EX-99.1 2 coral_ex991.htm PRELIMINARY ECONOMIC ASSESSMENT coral_ex991.htm
EXHIBIT 99.1
 
 
 
PRELIMINARY ECONOMIC

ASSESSMENT

on the

ROBERTSON PROPERTY

Lander County,
Nevada, USA

Prepared for

CORAL GOLD RESOURCES LTD.
Vancouver, B.C. Canada
 
Prepared by

Beacon Hill Consultants (1988) Ltd.

in conjunction with

Knight Piésold Ltd.
SRK Consulting (U.S.), Inc.
and
Kaehne Consulting Ltd.

January 15, 2012
 
 
 
 
 
 
 
 

 

Preliminary Economic Assessment
Robertson Property
 
TABLE OF CONTENTS
 
SECTION 1.0 SUMMARY
1-1  
     
1.1 SCOPE 1-1  
1.2 PROJECT DESCRIPTION 1-1  
1.3 RESOURCES 1-4  
1.4 MINE PLAN 1-4  
1.5 PROCESSING AND METALLURGY 1-7  
1.6 INFRASTRUCTURE 1-7  
1.7 ENVIRONMENTAL 1-7  
1.8 DEVELOPMENT SCHEDULE 1-8  
1.9 CAPITAL COSTS 1-11  
1.10 OPERATING COSTS 1-13  
1.11 FINANCIAL ANALYSIS 1-13  
1.12 RESULTS 1-13  
  1.12.1
Base Case (Owner Operated)
1-13  
  1.12.2
Results Alternative Case A1 (Contractor Operated)
1-16  
1.13 CONCLUSIONS 1-19  
1.14 RECOMMENDATIONS 1-20  
  1.14.1
Exploration and Definition Drilling
1-20  
  1.14.2
Metallurgical Test Work Program
1-21  
  1.14.3
Environmental Work
1-21  
  1.14.4
Geotechnical and Associated Investigations
1-22  
  1.14.5
Prefeasibility Study
1-23  
     
SECTION 2.0 INTRODUCTION 2-1  
     
2.1 SCOPE OF WORK 2-1  
2.2 PROJECT CRITERIA 2-1  
2.3 PROJECT MANAGEMENT 2-2  
2.4 TEAM MEMBERS 2-2  
2.5 DATA SUPPLIED BY CORAL 2-2  
2.6 EVALUATION CRITERIA 2-2  
     
SECTION 3.0 RELIANCE ON OTHER EXPERTS 3-1  
     
SECTION 4.0 PROPERTY DESCRIPTION AND LOCATION 4-1  
     
4.1 LOCATION 4-1  
4.2 MINING CLAIM DESCRIPTION 4-1  
4.3 AGREEMENTS AND ENCUMBRANCES 4-1  
4.4 ENVIRONMENTAL LIABILITIES 4-3  
4.5 PERMITTING 4-4  
4.6 LIST OF CLAIMS 4-7  
     
SECTION 5.0 ACCESSIBILITY, CLIMATE, LOCAL RESOURCES, 5-1  
     
INFRASTRUCTURE AND PHYSIOGRAPHY 5-1  
     
5.1 ACCESSIBILITY 5-1  
5.2 CLIMATE AND PHYSIOGRAPHY 5-1  
5.3 LOCAL RESOURCES AND INFRASTRUCTURE 5-1  
     
SECTION 6.0 HISTORY 6-1  
     
6.1 INTRODUCTION 6-1  
6.2 CORAL GOLD CORP. (1986-1989) 6-1  
6.3 AMAX GOLD (1990-1996) 6-2  
6.4 CORTEZ GOLD MINES (1998-1999) 6-3  
6.5 CORAL GOLD RESOURCES LTD (2001-2010) 6-3  
  6.5.1
Coral Drilling Programs (2004-2010)
6-3  
 
Coral Gold Resources Ltd.  January, 2012
 
 
 

 
 
Preliminary Economic Assessment
Robertson Property
 
  6.5.2
Coral Resource Studies (2001-2010)
6-4
   
SECTION 7.0 GEOLOGICAL SETTING AND MINERALIZATION 7-1
   
7.1 REGIONAL GEOLOGY 7-1
7.2 LOCAL GEOLOGY 7-1
7.3 ROBERTSON PROPERTY STRUCTURES 7-2
  7.3.1
Low-Angle Faults 
7-2
  7.3.2 NNW and East-West High-Angle Faults 7-3
  7.3.3 Northeast and North-South High-Angle Faults/Dikes 7-3
  7.3.4
Folds
7-3
7.4 MINERALIZED ZONES 7-8
  7.4.1
Porphyry Zone 
7-8
  7.4.2
39A Zone
7-8
  7.4.3
Gold Pan Zone
7-9
  7.4.4
Altenburg Hill Zone 
7-9
  7.4.5
Distal  Zone 
7-10
7.5 HYDROTHERMAL ALTERATION 7-11
  7.5.1
Potassic Alteration 
7-11
  7.5.2
Retrograde Skarn(?) 
7-11
  7.5.3
Late Stage Quartz (Silica)-Sericite-(Pyrite) 
7-11
  7.5.4
Chlorite-Clay
7-12
7.6 GOLD DISTRIBUTION 7-12
7.7 COPPER DISTRIBUTION 7-12
   
SECTION 8.0 DEPOSIT TYPES 8-1
   
8.1 EXPLORATION TARGET CONCEPT 8-1
8.2 GEOLOGICAL MODEL FOR THE ROBERTSON PROPERTY 8-2
   
SECTION 9.0 EXPLORATION  9-1
   
9.1 PRE-CORAL EXPLORATION ACTIVITY 9-1
9.2 CORAL GOLD EXPLORATION ACTIVITIES (1986-1989)  9-1
9.3 AMAX GOLD ACTIVITIES (1990-1996)  9-1
  9.3.1
39A Zone
9-1
  9.3.2
Porphyry Zone 
9-2
  9.3.3
Altenburg Hill Zone 
9-2
  9.3.4
Gold Pan Zone
9-4
9.4 CORTEZ ACTIVITIES (1999)  9-5
9.5 CORAL GOLD RESOURCES ACTIVITIES (2004-2006) 9-5
   
SECTION 10.0 DRILLING 10-1
   
10.1 CORAL DRILLING (2007) 10-1
10.2 CORAL DRILLING (2008) 10-1
  10.2.1
Altenburg Hill Zone 
10-1
  10.2.2
South Porphyry 
10-2
  10.2.3
39A Zone
10-2
  10.2.4
Distal Zone 
10-2
10.3 CORAL DRILLING (2010) 10-5
  10.3.1
Lower Triplet Gulch RC Drilling
10-6
  10.3.2
Diamond Drilling (2010)
10-6
10.4 DRILLING PROCEDURES 10-10
  10.4.1
Coral RC Drilling (1986-1989)
10-11
  10.4.2
Amax RC Drilling 
10-12
  10.4.3
Amax Diamond Drilling
10-12
  10.4.4
Cortez RC Drilling
10-13
  10.4.5
Coral RC Drilling (2004-2006, 2008 and 2010) 
10-13
  10.4.6
Coral Flooded RC Drilling (2007) 
10-14
  10.4.7
Coral Diamond Drilling (2010)
10-15
 
Coral Gold Resources Ltd. January, 2012
 
 
 

 
 
Preliminary Economic Assessment
Robertson Property
 
SECTION 11.0 SAMPLE PREPARATION, ANALYSES AND SECURITY 1-Nov 11-1
   
11.1 INTRODUCTION 11-1
11.2 AMAX RC AND CORE DRILLING 11-1
11.3 CORAL GOLD RESOURCES RC SAMPLING (2004-2006) 11-1
11.4 CORAL GOLD RESOURCES RC SAMPLING (2007) 11-1
11.5 CORAL GOLD RESOURCES RC SAMPLING (2008, 2010) 11-2
11.6 CORAL GOLD RESOURCES DRILL CORE SAMPLING (2010) 11-3
11.7 SAMPLE PREPARATION, ANALYSES AND SECURITY 11-3
 
11.7.1
Introduction
11-3
 
11.7.2
Amax Drill Sample Security Measures
11-4
 
11.7.3
Analyses of Amax Drill Samples
11-4
 
11.7.4
Metallic Screen Analyses
11-5
 
11.7.5
Cyanide-Soluble Gold and Copper Analyses
11-5
 
11.7.6
Use of Standards and Blanks
11-5
 
11.7.7
Coral Gold RC Drill Sample Security Measures (2004-2010)
11-5
 
11.7.8
Analyses of Coral Gold RC Drill Samples (2004-2010)
11-6
 
11.7.9
Coral Gold Core Drilling Sample Security Measures (2010)
11-6
 
11.7.10
Analyses of Coral Gold Core Drilling Samples (2010)
11-7
   
SECTION 12.0 DATA VERIFICATION 1-Dec 12-1
   
12.1 INTRODUCTION 12-1
12.2 DATA VERIFICATION OF AMAX DRILL SAMPLE RESULTS 12-1
12.3 CORAL GOLD DATA VERIFICATION OF RC DRILL SAMPLE RESULTS (2004-2006) 12-2
 
12.3.1
Summary of Verification-Drill Sample Results
12-2
 
12.3.2
Certified Reference Pulps
12-2
 
12.3.3
Check Assays
12-2
 
12.3.4
Rig Duplicate Samples
12-3
 
12.3.5
Coarse Blank and Low-Level Gold Samples
12-3
12.4 CORAL GOLD DATA VERIFICATION OF DEEP RC DRILL SAMPLE RESULTS (2007)  12-4
 
12.4.1
Summary of Verification-Drill Sample Results
 12-4
 
12.4.2
Certified Reference Pulps
 12-4
 
12.4.3
Rig Duplicate Samples
12-4
12.5 CORAL GOLD DATA VERIFICATION OF RC DRILL SAMPLE RESULTS (2008, 2010)  12-5
 
12.5.1
Summary of Verification-Drill Sample Results
 12-5
 
12.5.2
Certified Reference Pulps
12-5
 
12.5.3
Rig Duplicate Samples
12-6
 
12.5.4
Coarse Blank and Low-Level Gold Samples
12-6
12.6 CORAL GOLD DATA VERIFICATION OF DDH SAMPLE RESULTS (2010) 12-6
 
12.6.1
Summary of Verification-Drill Sample Results
12-7
 
12.6.2
Certified Reference Pulps
12-7
 
12.6.3
Check Assays
 12-7
 
12.6.4
Coarse Blank and Low-Level Gold Samples
12-8
 
12.6.5
Comparison of Twin DDH and RC Assay Results
12-8
12.7 AUTHORS DATA VERIFICATION 12-10
   
SECTION 13.0 MINERAL PROCESSING AND METALLURGICAL TESTING 13-1 13-1
   
13.1 INTRODUCTION  13-1
 
13.1.1
Historical Studies
13-2
 
Phase I
 
13-3
 
Phase II
 
13-3
 
13.1.2
Phase III
13-5
13.2 GOLD PAN, ALTENBURG HILL AND 39A RESOURCES 13-5 13-6
13.3 LEACH TESTS RESULTS 13-9
 
13.3.1
Distal, 39A and Altenburg Hill
13-9
 
13.3.2
Sample Selection and Composite Make-up Information,
13-9
 
13.3.3
Laboratory Test Conditions
 13-10
 
13.3.4
Results
 13-11
  13.3.5 Summary of Historical Laboratory Studies 13-14
  13.3.6 2011 Laboratory Study 13-15
  13.3.7 Column Leaching 13-15
13.4 CONCLUSIONS 13-30
 
Coral Gold Resources Ltd. January, 2012
 
 
 

 
 
Preliminary Economic Assessment
Robertson Property
 
SECTION 14.0 MINERAL RESOURCE ESTIMATES 
14-1
   
14.1
INTRODUCTION
14-1
14.2
DATA EVALUATION
14-1
14.3
TOPOGRAPHY
14-5
14.4
COMPUTERIZED GEOLOGIC MODELING
14-7
14.5
COMPOSITES
14-11
14.6
OUTLIERS
14-13
14.7
SPECIFIC GRAVITY DETERMINATIONS
14-14
14.8
VARIOGRAPHY
14-14
14.9
BLOCK MODEL DEFINITION
14-16
14.10
INDICATOR ESTIMATION
14-17
  14.10.1
Resource Interpolation 
14-18
14.11
RESOURCES
14-19
  14.11.1
Model Validation 
14-20
14.12
PIT OPTIMIZATION
14-23
14.13
PIT DESIGN AND RESOURCES
14-24
   
SECTION 15.0 MINERAL RESERVE ESTIMATES
15-1
   
SECTION 16.0 MINING METHODS 
16-1
   
16.1
MINING
16-1
  16.1.1
Resources and Production Rates 
16-1
  16.1.2
Pit Design 
16-2
  16.1.3
Mining Operations
16-2
16.2
MANPOWER
16-4
   
SECTION 17.0 RECOVERY METHODS 
17-1
   
17.1
PROCESS DESCRIPTION
17-1
  17.1.1
Introduction 
17-1
  17.1.2
Recovery Methods
17-1
   
SECTION 18.0 PROJECT INFRASTRUCTURE 
18-1
   
18.1
GENERAL
18-1
  18.1.1
Introduction 
18-1
  18.1.2
Site conditions
18-1
  18.1.3
Seismicity 
18-2
  18.1.4
Mine Development 
18-4
18.2
OPEN PIT DESIGN CRITERIA
18-4
  18.2.1
Information Review
18-4
  18.2.2
Slope Stability Analysis
18-5
  18.2.3
Summary 
18-7
18.3
LEACH PAD DESIGN CRITERIA 
18-7
  18.3.1
Summary 
18-7
  18.3.2
Site Selection
18-7
  18.3.3
Design Objectives 
18-8
  18.3.4
Design Basis 
18-8
  18.3.5
Foundation Preparation 
18-8
  18.3.6
Leach Pads 
18-9
  18.3.7
Pad Liner Systems
18-9
  18.3.8
Overliner and Solution Drainage System
18-9
  18.3.9
Pregnant Solution Transfer 
18-10
  18.3.10
Pregnant Solution Pond
 18-10
  18.3.11
Barren Solution Pond 
 18-10
  18.3.12
Solution Application 
18-11
  18.3.13
Event Pond
 18-11
  18.3.14
Diversion System 
18-12
  18.3.15
Leach Pad Design
18-12
 
Coral Gold Resources Ltd. January, 2012
 
 
 

 
 
Preliminary Economic Assessment
Robertson Property
 
18.4 FRESHWATER SUPPLY 18-19
18.5 WASTE ROCK STORAGE AREA 18-19
  18.5.1
Summary
18-19
  18.5.2
Geotechnical Conditions
18-20
  18.5.3
Waste Rock Storage Area struction and Operation
18-20
  18.5.4
Stability Assessment
18-21
  18.5.5
Reclamation
18-21
18.6 OPERATIONAL STRATEGY 18-21
18.7 MONITORING AND RECLAMATION 18-22
  18.7.1
Monitoring:
18-22
  18.7.2
Reclamation:
18-22
18.8 SITE WATER MANAGEMENT 18-23
  18.8.1
General
18-23
  18.8.2
Design Storm
18-23
  18.8.3
Design Methodology
18-24
18.9 ELECTRICAL SUPPLY AND DISTRIBUTION 18-26
  18.9.1
Summary
18-26
  18.9.2
Introduction
18-26
  18.9.3
Electrical Power Supply
18-26
  18.9.4
Electrical Distribution
18-30
  18.9.5
Process Drive Motors
18-30
  18.9.6
Grounding
18-30
  18.9.7
Lighting
 18-30
  18.9.8
 Fire Detection & Suppression
 18-30
  18.9.9
Security
18-30
  18.9.10
Process Control / Instrumentation
18-30
  18.9.11
Plant Site Communications
18-31
18.10 OTHER SURFACE INFRASRUCTURE 18-31
  18.10.1
Transportation of Doré Bars
18-31
  18.10.2
Fuel Storage
18-31
  18.10.3
Explosive Storage
18-31
  18.10.4
Warehouse/Shops
18-31
  18.10.5
Administration Building / Security and Gatehouse
 18-31
   
SECTION 19.0 MARKET STUDIES AND CONTRACTS 19-1
   
SECTION 20.0 ENVIRONMENTAL STUDIES, PERMITTING AND SOCIAL OR COMMUNITY IMPACT 20-1
   
  20.1.1
Introduction
20-1
  20.1.2
Authorized Exploration Activities
20-2
  20.1.3
Proposed Exploration Activities
20-3
  20.1.4
Future Mining
20-3
  20.1.5
Federal Permitting
20-6
20.2 STATE PERMITTING 20-8
  20.2.1
Local Permitting
20-8
  20.2.2
Liabilities
20-9
 
Coral Gold Resources Ltd. January, 2012
 
 
 

 
 
Preliminary Economic Assessment
Robertson Property
 
SECTION 21.0 CAPITAL AND OPERATING COSTS 21-1
   
21.1 CAPITAL COSTS 21-1
  21.1.1
Introduction
21-1
  21.1.2
Basis of Estimate
21-1
  21.1.3
Cost Summaries
21-1
  21.1.4
Environmental
 21-4
  21.1.5
Exploration
 21-4
  21.1.6
Metallurgical Test Work
 21-4
  21.1.7
Prefeasibility and Full Feasibility Studies
 21-4
  21.1.8
Detail Design
 21-4
  21.1.9
Purchase of Royalty
21-4
  21.1.10
Crusher and Screening Facilities
21-4
  21.1.11
Stacker, Conveyors and Silo
21-5
  21.1.12
Leach Facilities
21-5
  21.1.13
ARD Plant and Associated Facilities
21-7
  21.1.14
Yard Facilities and Mobile Equipment
 21-7
  21.1.15
Buildings and Structures, Fuel Supply and Explosives Magazine
 21-7
  21.1.16
Mining Equipment
21-7
  21.1.17
Pre-production Development
21-8
  21.1.18
Electrical Capital Cost
21-8
  21.1.19
Water Distribution and Sewage
21-9
  21.1.20
Additional Costs
21-10
  21.1.21
Ongoing Costs
21-10
21.2 OPERATING COSTS 21-11
  21.2.1
Basis of Estimate
21-11
21.3 CRUSHING AND ARD PLANT 21-13
  21.3.1
Electrical
21-13
   
SECTION 22.0 ECONOMIC ANALYSIS 22-1
   
22.1 FINANCIAL ANALYSIS 22-1
  22.1.1
Financial Analysis Method
22-1
  22.1.2
Results Base Case
22-1
  22.1.3
Results Alternative Case A1
22-6
   
SECTION 23.0 ADJACENT PROPERTIES 23-1
   
SECTION 24.0 OTHER RELEVANT DATA AND INFORMATION 24-1
   
SECTION 25.0 INTERPRETATION AND CONCLUSIONS 25-1
   
25.1 INTRODUCTION 25-1
25.2 CONCLUSIONS 25-3
   
SECTION 26.0 RECOMMENDATIONS 26-1
   
26.1 EXPLORATION AND DEFINITION DRILLING 26-1
26.2 METALLURGICAL TEST WORK PROGRAM 26-3
26.3 GEOTECHNICAL AND ASSOCIATED INVESTIGATIONS 26-5
  26.3.1
Heap Leach Pad Stability Assessment
26-5
  26.3.2
Open Pit and Plant Site
26-6
  26.3.3
Foundation Design
 26-7
26.4 ENVIRONMENTAL WORK 26-7
26.5 PREFEASIBILITY STUDY 26-8
   
SECTION 27.0 REFERENCES 27-1
   
SECTION 28.0 CERTIFICATE OF QUALIFIED PERSONS 28-1
   
SECTION 29.0 DATE AND SIGNATURE PAGE ...............ERROR! BOOKMARK NOT DEFINED. 29-1
 
Coral Gold Resources Ltd. January, 2012
 
 
 

 

Preliminary Economic Assessment
Robertson Property
 
List of Tables
 
TABLE 1.1:
INFERRED RESOURCES FOR ROBERTSON 1-4
TABLE 1.2:
PRODUCTION SCHEDULE 1-5
TABLE 1.3:
CAPITAL COST SUMMARY $(000)’S (OWNER OPERATED) 1-11
TABLE 1.4:
CAPITAL COST SUMMARY $(000)’S (CONTRACTOR OPERATED) 1-11
TABLE 1.5:
ONGOING CAPITAL COST SUMMARY $(000)’S (OWNER OPERATED) 1-11
TABLE 1.6:
ONGOING CAPITAL COST SUMMARY $(000)’S (CONTRACTOR OPERATED) 1-11
TABLE 1.7:
OPERATING COST SUMMARY $(000)’S (OWNER OPERATED) 1-12
TABLE 1.8:
OPERATING COST SUMMARY $(000)’S (CONTRACTOR OPERATED) 1-12
TABLE 1.9:
FINANCIAL ANALYSIS (OWNER OPERATED) 1-14
TABLE 1.10:
SENSITIVITIES (OWNER OPERATOR) 1-15
TABLE 1.11:
FINANCIAL ANALYSIS ALTERNATIVE 1 (CONTRACTOR OPERATED) 1-17
TABLE 1.12:
SENSITIVITIES – ALTERNATIVE 1 (CONTRACTOR OPERATED) 1-18
TABLE 1.13:
SUMMARY OF EXPENDITURES FOR STAGE 1 1-19
TABLE 1.14:
PROPOSED TEST WORK TO PREFEASIBILITY 1-20
TABLE 1.15:
SUMMARY OF PROPOSED ENVIRONMENTAL WORK 1-21
TABLE 1.16:
PREFEASIBILITY COST ESTIMATE 1-22
TABLE 4.1:
TABULATION OF MINING LEASE AND OPTION AGREEMENTS 4-3
TABLE 6.1:  
SUMMARY OF PRE-CORAL DRILLING ACTIVITIES AT ROBERTSON 6-1
TABLE 6.2:  
ROBERTSON PROPERTY DRILL-INDICATED RESOURCES (1996) 6-2
TABLE 6.3:  
ROBERTSON PROPERTY INDICATED RESOURCE ESTIMATE (MCCUSKER, 2001) 6-5
TABLE 6.4:  
ROBERTSON PROPERTY MEASURED AND INDICATED MINERAL RESOURCES (BARNES, 2006) 6-5
TABLE 6.5:
ROBERTSON PROPERTY INFERRED MINERAL RESOURCES (MCCUSKER, 2006) 6-5
TABLE 6.6:  
INFERRED MINERAL RESOURCE ESTIMATE FOR ROBERTSON PROPERTY (BEACON HILL, 2008) 6-6
TABLE 6.7:  
INFERRED MINERAL RESOURCE ESTIMATE FOR ROBERTSON PROPERTY (BEACON HILL, 2009) 6-6
TABLE 7.1:  
SUMMARY OF MINERALS IDENTIFIED AT THE ROBERTSON PROPERTY 7-12
TABLE 7.2:  
SUMMARY OF SIGNIFICANT COPPER INTERCEPTS IN THE PORPHYRY ZONE* 7-14
TABLE 7.3:  
SUMMARY OF DISTAL ZONE ASSAY RESULTS USING A 0.05 OZAU/T CUTOFF 7-15
TABLE 9.1:  
SUMMARY OF SIGNIFICANT GOLD INTERCEPTS IN THE 39A ZONE* 9-3
TABLE 9.2: 
SUMMARY OF SIGNIFICANT GOLD INTERCEPTS IN THE PORPHYRY ZONE* 9-4
TABLE 10.1:
SUMMARY OF SIGNIFICANT GOLD INTERCEPTS IN TV07-1 AND TV07-2 10-1
TABLE 10.2:
SUMMARY OF 2008 DRILLING 10-3
TABLE 10.3:
SUMMARY OF ASSAY RESULTS FOR THE 2010 LOWER TRIPLET GULCH RC DRILLING 10-7
TABLE 10.4:
SUMMARY OF ASSAY RESULTS FOR THE 2010 DIAMOND DRILL HOLES 10-9
TABLE 10.5:
ROBERTSON PROPERTY DRILLING SUMMARY 10-11
TABLE 10.6:  
SUMMARY OF CORAL RC DRILLING FROM 2004 THROUGH 2010 10-14
TABLE 12.1:
COMPARISON OF GLOBAL AVERAGE GRADES BETWEEN TWIN CORE AND RC HOLES 12-8
TABLE 12.2:
COMPARISON OF TWINNED RC/DDH > 0.01 OZAU/T GRADE ZONES 12-9
TABLE 13.1:
CYANIDE LEACH TESTS 13-2
TABLE 13.2:
SUMMARY OF PHASE I METALLURGICAL TEST RESULTS (AMAX R&D,1993) 13-3
TABLE 13.3:  
SUMMARY OF PHASE II METALLURGICAL TEST RESULTS (MCCLELLAND, 1994) 13-4
TABLE 13.4:
SUMMARY OF PHASE III METALLURGICAL TEST RESULTS (MCCLELLAND, 1994) 13-5
TABLE 13.5:
SUMMARY OF BULK SULFIDE FLOTATION TEST RESULTS (MCCLELLAND, 1996) 13-6
TABLE 13.6
SUMMARY OF BOTTLE ROLL TEST RESULTS (MCCLELLAND, 1996) 13-7
TABLE 13.7:
SUMMARY OF COLUMN LEACH TEST RESULTS (MCCLELLAND, 1996) 13-8
TABLE 13.8:  
SUMMARY METALLURGICAL RESULTS, GRAVITY AND FLOTATION TESTS, 80%-75UM FEED SIZE 13-11
TABLE 13.9:
SUMMARY METALLURGICAL RESULTS - BOTTLE ROLL TESTS 13-13
TABLE 13.10:
HEAD ANALYSES OXIDE AND PARTIAL OXIDIZED COMPOSITES 13-16
TABLE 13.11:
HEAD ANALYSES SULFIDE COMPOSITES 13-16
TABLE 13.12:
OB COMPOSITES HEAD ANALYSES 13-17
TABLE 13.13:
ALTENBURG HILL OXIDE COMPOSITES –BOTTLE ROLL GOLD LEACH RESPONSE 13-18
TABLE 13.14:
GOLD PAN DEPOSIT PARTIALLY OXIDIZED COMPOSITES 13-18
TABLE 13.15:
ALTENBURG HILL SULFIDE COMPOSITES –BOTTLE ROLL GOLD LEACH RESPONSE 13-19
TABLE 13.16:
GOLD PAN DEPOSIT SULFIDE COMPOSITES 13-20
 
Coral Gold Resources Ltd. January, 2012
 
 
 

 
 
Preliminary Economic Assessment
Robertson Property
 
TABLE 13.17:
OB COMPOSITES –BOTTLE ROLL GOLD LEACH RESPONSE
13-20
TABLE 13.18:
-3/4” COLUMN LEACH COMPOSITES
13-23
TABLE 13.19:
-3/4” COLUMN LEACH RESULTS
13-24
TABLE 14.1:
REPORT CONVENTIONS AND ABBREVIATIONS
14-1
TABLE 14.2:
STATISTICS FOR GOLD ASSAYS FOR THE ROBERTSON DEPOSIT
14-2
TABLE 14.3:
STATISTICS FOR GOLD ASSAYS FOR THE ROBERTSON DEPOSIT
14-2
TABLE 14.4
COMPOSITE STATISTICS
14-11
TABLE 14.5:
INFERRED RESOURCES FOR ROBERTSON
14-19
TABLE 14.6:
INFERRED RESOURCES FOR ROBERTSON
14-21
TABLE 14.7:
INFERRED RESOURCES ALTENBURG HILL
14-26
TABLE 14.8:
INFERRED RESOURCES PORPHYRY
14-27
TABLE 14.9:
INFERRED RESOURCES GOLD PAN
14-27
TABLE 16.1:  
PRODUCTION SCHEDULE BY YEAR
16-3
TABLE 16.2:  
LIST OF MAJOR EQUIPMENT
16-4
TABLE 16.3:
ADMINISTRATION STAFF
16-4
TABLE 16.4:
SURFACE OPERATIONS
16-5
TABLE 16.5:
MINE STAFF
16-5
TABLE 16.6:  
MINE OPERATIONS
16-5
TABLE 16.7:  
PROCESS PLANT AND LEACH PAD
16-6
TABLE 18.1:
MONTHLY CLIMATE DATA1
18-2
TABLE 18.2:
DESIGN STORM EVENTS1
18-23
TABLE 18.3:
CHANNEL DESIGN
18-25
TABLE 20.1:
AUTHORIZED AND EXISTING DISTURBANCE
20-2
TABLE 20.2:
SUMMARY OF MAJOR PERMITS FOR FUTURE MINING
20-5
TABLE 20.3:
FUTURE BASELINE STUDIES
20-7
TABLE 20.4:
STATE PERMITS FOR FUTURE MINING
20-8
TABLE 21.1:
INITIAL CAPITAL EXPENDITURES – BASE CASE (OWNER OPERATOR)
21-2
TABLE 21.2:
INITIAL CAPITAL EXPENDITURES - ALTERNATE 1 (CONTRACTOR OPERATOR)
21-3
TABLE 21.3:
SUMMARY OF ESTIMATED COST CRUSHING AND ASSOCIATED FACILITIES
21-5
TABLE 21.4:
PRELIMINARY CAPITAL COST ESTIMATE TOTAL CONSTRUCTION COSTS
21-6
TABLE 21.5:
SUMMARY OF ESTIMATED COST ARD PLANT AND ASSOCIATED FACILITIES
21-7
TABLE 21.6:
MINE EQUIPMENT
21-8
TABLE 21.7:
ELECTRICAL CAPITAL
21-9
TABLE 21.8:
ONGOING CAPITAL COSTS – BASE CASE (OWNER OPERATOR)
21-10
TABLE 21.9:
ONGOING CAPITAL COSTS ALTERNATE 1 (CONTRACTOR OPERATOR)
21-10
TABLE 21.10:
PRELIMINARY SUSTAINING CAPITAL COST - SURFACE FACILITIES
21-11
TABLE 21.11:
OPERATING COST SUMMARY $(000)’S BASE CASE. (OWNER OPERATOR)
21-12
TABLE 21.12:
OPERATING COST SUMMARY $(000)’S ALTERNATIVE 1 (CONTRACTOR OPERATOR)
21-12
TABLE 21.13:
SUMMARY OPERATING COST 7500TPD
21-13
TABLE 21.14:
SUMMARY OPERATING COST 12500TPD
21-13
TABLE 21.15:
ANNUAL ELECTRICAL POWER COSTS
21-14
TABLE 22.1:
FINANCIAL ANALYSIS (OWNER OPERATOR)
22-2
TABLE 22.2:
SENSITIVITIES (OWNER OPERATOR)
22-3
TABLE 22.3:
FINANCIAL ANALYSIS ALTERNATIVE 1 (CONTRACTOR OPERATOR)
22-7
TABLE 22.4:
SENSITIVITIES – ALTERNATIVE 1 (CONTRACTOR OPERATOR)
22-8
TABLE 26.1:
SUMMARY OF EXPENDITURES FOR STAGE 1
26-1
TABLE 26.2:
RECOMMENDED 2012-13 DRILLING PROGRAM AND BUDGET
26-3
TABLE 26.3:
ESTIMATED COST - METALLURGICAL TEST WORK PROGRAM
26-5
TABLE 26.4:
SUMMARY OF PROPOSED ENVIRONMENTAL WORK
26-8
TABLE 26.5:
PREFEASIBILITY COST ESTIMATE
26-8
 
Coral Gold Resources Ltd. January, 2012
 
 
 

 
 
Preliminary Economic Assessment
Robertson Property
 
List of Figures
 
FIGURE 1-1:
LOCATION MAP
1-2
FIGURE 1-2:
CLAIM MAP
1-3
FIGURE 1-3:
GENERAL ARRANGEMENT
1-8
FIGURE 1-4:
DEVELOPMENT SCHEDULE
1-9
FIGURE 4-1:
ROBERTSON PROPERTY LOCATION MAP.
4-5
FIGURE 4-2:
CLAIM MAP
4-6
FIGURE 6-1:
DRILL HOLE LOCATION MAP PRE-CORAL DRILLING
6-8
FIGURE 6-2:
CORAL GOLD CORP. DRILL HOLE LOCATION MAP (1986-89)
6-9
FIGURE 6-3:
DRILL HOLE LOCATION MAP AMAX GOLD DRILLING
6-10
FIGURE 6-4:
DRILL LOCATION MAP CORTEZ DRILLING
6-11
FIGURE 6-5:
DRILL HOLE LOCATION MAP ROBERTSON PROPERTY
6-12
FIGURE 6-6:
MAP SHOWING LOCATIONS OF THE 2007 DEEP DRILL HOLES AND USGS HOLE NO.1.
6-13
FIGURE 6-7:
2010 DRILL HOLE LOCATION MAP.
6-14
FIGURE 7-1:
REGIONAL GEOLOGY MAP
7-5
FIGURE 7-2:
DISTRICT GEOLOGY MAP
7-6
FIGURE 7-3:
“TYPICAL” CROSS SECTION THROUGH 39A ZONE LOOKING WEST.
7-7
FIGURE 7-4:
RESOURCE MAP
7-16
FIGURE 7-5:
PORPHYRY ZONE SECTION 12,600N LOOKING NORTH
7-17
FIGURE 7-6:
PORPHYRY ZONE SECTION 11,500E LOOKING WEST
7-18
FIGURE 7-7:
39A ZONE GEOLOGY SECTION D-D1 LOOKING WEST.
7-19
FIGURE 7-8:
TYPICAL CROSS SECTION C-C’ LOOKING NORTHEAST THROUGH ALTENBURG HILL INFERRED MINERAL RESOURCE.
7-20
FIGURE 7-9:
CROSS SECTION A-A’ THROUGH DISTAL ZONE MINERAL RESOURCE. SECTION LOOKING EAST
7-21
FIGURE 7-10:
CROSS SECTION B-B’ THROUGH DISTAL ZONE INFERRED MINERAL RESOURCE. SECTION LOOKING NORTH.
7-22
FIGURE 12-1:
COMPARISON OF GLOBAL AVERAGE GRADES FOR TWINNED CORE HOLES (BLACK) VS.
12-11
FIGURE 12-2:
COMPARISON OF INITIAL LAB ASSAYS (BLACK) VS. RMG HEAD ASSAYS (RED)
12-12
FIGURE 12-3:
COMPARISON OF INITIAL ASSAYS (BLACK) VS. CALCULATED CN HEAD GRADE (RED)
12-12
FIGURE 12-4:
 COMPARISON OF INITIAL ASSAY (BLACK) VS. RMG HEAD GRADE (RED)
12-13
FIGURE 12-5:
COMPARISON OF INITIAL ASSAYS (BLACK) VS. CALCULATED CN HEAD GRADE (RED)
12-13
FIGURE 12-6:
COMPARISON OF CHECK ASSAYS (BLACK) VS. CALCULATED CN HEAD GRADE (RED)
12-14
FIGURE 13-1*:
GOLD RECOVERY VS HEAD GRADE BOTTLE ROLL TESTS
13-21
FIGURE 13-2*:
GOLD RECOVERY VS SULFIDE SULPHUR BOTTLE ROLL TESTS
13-21
FIGURE 13-3*:
NACN CONSUMPTION VS COPPER DISSOLUTION
13-22
FIGURE 13-4*:
NACN CONSUMPTION VS SULPHIDE SULPHUR
13-22
FIGURE 13-5*:
LEACH RATE PROFILE COLUMN LEACH TEST F-1 OB –COMP - LOW
13-25
FIGURE 13-6*:
LEACH RATE PROFILE COLUMN LEACH TEST F-1 OB –COMP - HIGH
13-26
FIGURE 13-7*:
LEACH RATE PROFILE COLUMN LEACH TEST F-4
13-27
FIGURE 13-8*:
LEACH RATE PROFILE COLUMN LEACH TEST F-5
13-28
FIGURE 13-9*:
LEACH RATE PROFILE COLUMN LEACH TEST F-6
13-28
FIGURE 13-10*:
LEACH RATE PROFILE COLUMN LEACH TEST F-7
13-29
FIGURE 13-11*:
GOLD RECOVERY COMAPRISON
13-30
FIGURE 14-1:
AU ASSAYS WEIGHTED
14-3
FIGURE 14-2:
CUMULATIVE DISTRIBUTION PLOT OF AU ASSAYS.
14-3
FIGURE 14-3:
PLAN VIEW SHOWING DRILL HOLES USED IN RESOURCE ESTIMATE.
14-4
FIGURE 14-4:
LONG SECTION PERSPECTIVE VIEW (LOOKING NORTH) SHOWING ALL DRILL HOLES USED IN RESOURCE ESTIMATE
14-4
FIGURE 14-5:
PLAN VIEW OF THE 3D GRIDDED TOPOGRAPHIC.
14-5
FIGURE 14-6:
PLAN VIEW OF THE 3D GRIDDED MODEL OF QUATERNARY ALLUVIUM LAYER (NORTH TO TOP OF SCREEN).
14-6
FIGURE 14-7:
PLAN VIEW OF SHOWING DRILL HOLES WITH INTERPRETATION OF THE MINERALIZED ZONES
 
 
(GOLD PAN-YELLOW, DISTAL-GREEN, PORPHYRY- ORANGE, ALTENBURG HILL-BLUE AND TRIPLET
 
 
GULCH-RED) CLIPPED TO TOPOGRAPHY
14-8
 
Coral Gold Resources Ltd.
January, 2012
 
 
 

 
 
 Preliminary Economic Assessment Robertson Property
 
FIGURE 14-8:
PLAN VIEW OF SHOWING DRILL HOLES WITH INTERPRETATION OF THE MINERALIZED ZONES (39A-PURPLE, DISTAL-GREEN, PORPHYRY- ORANGE, ALTENBURG HILL-BLUE AND TRIPLET GULCH RED) CLIPPED TO TOPOGRAPHY
 
14-8
FIGURE 14-9:
PLAN VIEW OF SHOWING DRILL HOLES WITH INTERPRETATION OF THE OXIDE ZONE CLIPPED TO TOPOGRAPHY
14-9
FIGURE 14-10:
SECTION VIEW OF SHOWING DRILL HOLES WITH INTERPRETATION OF THE OXIDE ZONE CLIPPED TO TOPOGRAPHY
14-9
FIGURE 14-11:
SECTION VIEW OF SHOWING DRILL HOLES WITH INTERPRETATION OF THE MINERALIZED ZONES (GOLD PAN-YELLOW, DISTAL-GREEN, PORPHYRY- ORANGE, ALTENBURG HILL-BLUE AND TRIPLET GULCH-RED) OVERLAIN WITH THE OXIDE SOLID IN RED AND YELLOW SOLID CLIPPED TO TOPOGRAPHY.
14-10
FIGURE 14-12:
PLAN VIEW OF SHOWING DRILL HOLES WITH INTERPRETATION OF THE MINERALIZED ZONES (GOLD PAN-YELLOW, DISTAL-GREEN, PORPHYRY- ORANGE, ALTENBURG HILL-BLUE AND TRIPLET GULCH-RED) OVERLAIN WITH THE OXIDE SOLID IN RED AND YELLOW SOLID CLIPPED TO TOPOGRAPHY.
14-10
FIGURE 14-13:
HISTOGRAM FOR AU, 20 FOOT COMPOSITES  
14-12
FIGURE 14-14:
GRADE-TONNAGE CURVES FOR AU, 20 FOOT COMPOSITES
14-12
FIGURE 14-15:
BOX PLOTS FOR AU, 20 FOOT COMPOSITES 
14-13
FIGURE 14-16:
PROBABILITY PLOT FOR AU, 20 FOOT COMPOSITES 
14-14
FIGURE 14-17:
DOWNHOLE CORRELOGRAM FOR AU WITHIN ALL ZONES
14-15
FIGURE 14-18:
BLOCK MODEL ORIGIN
14-16
FIGURE 14-19:
BLOCK MODEL LIMITS
14-17
FIGURE 14-20:
0.005 OZAU/T INDICATOR ISOVOLUMES
14-18
FIGURE 14-21:
PLAN VIEW OF GRADE MODEL DISPLAYING BLOCK MODEL WITH DRILLHOLES
14-19
FIGURE 14-22:
PIT SHELLS DERIVED FROM LERSCH-GROSSMAN PIT OPTIMIZATION
14-24
FIGURE 14-23:
BENCHED PIT DESIGNS WITH HAUL ROADS
14-25
FIGURE 17-1:
CRUSHING HEAP LEACH PROCESS 7500TPD 
17-2
FIGURE 17-2:
ARD PLAN AND ELEVATION
17-3
FIGURE 17-3:
ARD PLAN AND ELEVATION  
17-4
FIGURE 17-4:
ARD PLAN AND ELEVATION 
17-5
FIGURE 18-1 :
USGS SEISMIC HAZARD MAP - PEAK GROUND ACCELERATION (1:475)
18-3
FIGURE 18-3:
HEAP LEACH FACILITIES PAD DETAILS (1 OF 2)  
18-14
FIGURE 18-4:
HEAP LEACH FACILITIES PAD DETAILS (2 OF 2)
18-15
FIGURE 18-5:
HEAP LEACH FACILITIES SOLUTION TRANSFER CHANNELS - SECTION
18-16
FIGURE 18-6:
HEAP LEACH FACILITIES SOLUTION POND DETAILS (1 OF 2)
18-17
FIGURE 18-7:
HEAP LEACH FACILITIES SOLUTION POND DETAILS (2 OF 2)
18-18
FIGURE 18-8:
NOAA DEPTH DURATION CURVES FOR PROJECT AREA1
18-24
FIGURE 18-9:
OVERALL POWER DISTRIBUTION LAYOUT  
18-28
FIGURE 18-10:
ELECTRICAL SINGLE LINE DIAGRAM 
18-29
FIGURE 18-11:
ADMINISTRATION / MINE DRY - GENERAL ARRANGEMENT PLAN (SHEET 1 OF 2)
18-32
FIGURE 18-12:
ADMINISTRATION / MINE DRY - GENERAL ARRANGEMENT PLAN (SHEET 2 OF 2)
18-32
FIGURE 18-13:
ADMINISTRATION / MINE DRY - GENERAL ARRANGEMENT ELEVATIONS
18-33
FIGURE 18-14:
TRUCKSHOP MAINTENANCE COMPLEX - GENERAL ARRANGEMENT PLAN AND END VIEW
18-33
FIGURE 18-15:
WAREHOUSE - GENERAL ARRANGEMENT PLAN AND END VIEW
18-34
FIGURE 18-16:
SECURITY GATEHOUSE - GENERAL ARRANGEMENT PLAN AND ELEVATION
18-34
FIGURE 18-17:
FUEL STORAGE AND DISTRIBUTION STATION - GENERAL ARRANGEMENT PLAN AND ELEVATION  
18-35
FIGURE 25-1:
 
25-1
 
Coral Gold Resources Ltd.
January, 2012
 
 
 

 
   
 Preliminary Economic Assessment Robertson Property
 
SECTION 1.0 SUMMARY

1.1 SCOPE
 
A Preliminary Economic Assessment (PEA) has been prepared, to meet the NI 43-101 criteria for a technical report on the Robertson property by Beacon Hill Consultants (1988) Ltd. (Beacon Hill) on behalf of the property owners, Coral Gold Resources Ltd. (Coral).
 
1.2 PROJECT DESCRIPTION
 
The Robertson Property is an advanced-stage gold exploration project located in eastern Lander County, Nevada, 60 miles southwest of Elko. Coral Resources, Inc., a subsidiary of Coral Gold Resources Limited of Vancouver, B. C., acquired control of the Robertson Property in 1986. The property consists of 601 unpatented federal lode claims, mill sites, placer claims and nine patented lode claims covering over 7,300 acres of public lands administered by the Bureau of Land Management. Coral is record owner of 525 claims and controls an additional 76 claims through a series of mineral leases and option agreements.
 
Site location and claim map are shown on Figure 1-1 and 1-2 respectively.
 
 
 
 
 
Coral Gold Resources Ltd. 1-1 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

__________________
1All figure numbers are shown at the bottom of each figure. The figure number contained within the figure should be disregarded.
 
 
 
Coral Gold Resources Ltd. 1-2 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


 
 
 
Coral Gold Resources Ltd. 1-3 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

1.3 RESOURCES
 
The inferred resources estimated, as shown on Table 1.1, for the Altenburg Hill, Porphyry and Gold Pan zones is based upon a cut-off grade of 0.0147 ozAu/t for each zone termed as higher grade and 0.005 ozAu/t for lower grade material and upon the following open pit criteria;
 
• 
Ore mining cost of US$1.27 per ton2;
• 
Waste mining cost of US$1.43 per ton;
• 
Processing cost of US$6.25 per ton;
• 
Metallurgical recovery of 70%;
• 
Gold price of US$1,000 per ounce;
• 
Tonnage factor of 12.2 cubic foot per ton;
• 
Pit slope angles of 45 degrees
• 
Bench interval 20 feet at double benches for a total of 40 feet
• 
Berm width 25 feet
• 
Slope angle bench 70 degrees
• 
Roadway gradient 8%
• 
Roadway width 105 feet.
 
Table 1.1: Inferred Resources for Robertson3
 
 
Higher Grade
Lower Grade
Total
Zone
Quantity
Grade
Gold
Quantity
Grade
Gold
Quantity
Grade
Gold
 
Tons
ozAu/t
Oz
Tons
ozAu/t
Oz
Tons
ozAu/t
Oz
Altenburg
5,557,572
0.0189
105,038
13,810,677
0.0106
146,749
19,368,249
0.0130
251,787
Porphyry
17,337,872
0.0209
362,362
28,888,371
0.0103
296,479
46,226,243
0.0143
658,840
Gold Pan
3,613,310
0.0223
80,577
9,01,14
0.0100
89,717
12,614,324
0.0135
170,293
Total
26,508,754
0.0207
547,976
51,700,062
0.0103
532,945
78,208,816
0.0138
1,080,921
 
1.4           MINE PLAN
 
The mine plan as described in this report evaluates the open pit mining of three deposits of the Robertson property, the Altenburg Hill, Porphyry and Gold Pan zones. These deposits contain mineralization which is considered based upon metallurgical work to have cyanide heap leach potential. The estimated inferred resources at a cut-off of 0.005ozAu/t are some 78.2 million tons containing 1.08 million oz of gold. Based upon cut-off of 0.0147ozAu/t for a crushed higher grade heap leach recovery of 67% and a run-off-mine lower grade heap recovery of 45%, the recovered ozs are 604,100 oz. The mine life has been estimated at 10.5 years at a maximum production rate of approximately 40,000 tons per day for both mineral and waste. The waste to mineral strip ratio is 0.6:1.
 
The production rate was determined to establish a life of at least 8 years and no more than 15 years to minimize capital and operating costs and provide an acceptable yearly gold production and return on investment. It was determined that to meet these goals it was beneficial to leach the higher grade separate from the lower grade. The schedule was optimized by mining the zones that would provide the lowest strip ratio, Altenburg Hill together with the larger Porphyry first and then Gold Pan. The production schedule for each deposit and the combined rates is shown on Table 1.2.
_____________
2 Since this is a property located in the USA all units are shown in imperial unless specifically noted as otherwise.
 
3 Due to the uncertainty that may be attached to an inferred mineral resource, it cannot be assumed that all or any part of an inferred mineral resource will be upgraded to an indicated or measured resource as a result of continued exploration.
 
 
Coral Gold Resources Ltd. 1-4 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Table 1.2: Production Schedule
 
 
 
 
Coral Gold Resources Ltd. 1-5 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

1.5  PROCESSING AND METALLURGY
 
A considerable amount of metallurgical work has been completed over a number of years for forecasting leach recoveries for the Altenburg Hill, Porphyry and Gold Pan mineralized zones. In 2011 further laboratory test work was performed by McClelland Laboratories, Inc., Sparks, Nevada based upon samples from the Altenburg Hill and Gold Pan Deposits. No recent metallurgical test work has been done on the Porphyry deposit.
 
In this study, based on previous work and the recent work completed by McClelland Laboratories recoveries have been assumed as follows;
 
1.  
Mineralization that grades 0.0147ozAu/t or higher that will be crushed prior to being placed on the leach pad - 67% leach recovery;
2.  
Run-off-mine mineralization that has a grade lower than 0.0147ozAu/t and a cut-of 0.005ozAu/t - 45% recovery.
 
It should be noted that considerable further work is required to confirm the foregoing leach recoveries and they should be considered as indicative only.
 
1.6 INFRASTRUCTURE
 
The general arrangement drawing, which includes the open pits, haul roads, leach pads, pipelines, ponds, offices, dry, ADR plant, warehouse and maintenance facilities is shown on Figure 1-3.
 
1.7 ENVIRONMENTAL
 
The Project area consists of approximately 7300 acres, of which 169 acres are private lands, held as patented mining claims either owned or controlled by Coral Gold Resources, Inc. (Coral). The remaining 7131 acres are public lands administered by the BLM Mount Lewis Field Office (MLFO) in Lander County; Coral controls approximately 601 unpatented lode and placer claims on these public lands.
 
This mixed estate makes the MLFO the primary agency for authorizing mining activities on public and private land; the MLFO works with the Nevada Division of Environmental Protection - Bureau of Mining Regulation and Reclamation (BMRR) under a memorandum of understanding to authorize mining on projects on both public and private lands.
 
As a result of the foregoing there are a number of environmental evaluations, reports and approvals required to allow for work to be done on the property.
 
The first of these is an Environmental Assessment (EA) which upon approval by the regulatory authorities will provide the basis for work to commence on the property. It is expected that the EA, being performed by SRK Elko Nevada, will be completed by January 2012 and approval achieved during the third quarter 2012. Coral have indicated that they expect a number of drill holes to be approved prior to approval of the EA such that drilling can commence in the second quarter 2012. The EA approval will allow for the further drilling and the removal of samples for laboratory metallurgical test work and on-site bulk leach program to confirm laboratory results.
 
The second study will be site environmental work to provide data for an EIS based upon the proposed mine plan for the property. These studies and associated approvals are the critical timeline for the project and any improvement to shorten this timeline will be beneficial to bringing the project on stream as soon as feasible. The schedule of these activities is shown on Figure 1-4.
 
 
 
Coral Gold Resources Ltd. 1-6 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
1.8 DEVELOPMENT SCHEDULE
 
An overall development schedule of activities has been derived. The schedule provides a two stage approach to the development of the project; the first stage is the work program required to advance the project to prefeasibility. This program on the Altenburg Hill, Porphyry and Gold Pan deposits includes exploration and drill definition activities, metallurgical test work, environmental studies, geotechnical open pit and infrastructure test work and evaluations, infrastructure requirements, and capital and operating costs. The work is intended to upgrade the level of confidence in the resource estimates to measured and indicated categories and based on prefeasibility cost estimates move the resources into reserves.
 
It should be noted;
 
•  
there is no guarantee that resources will be designated as measured and indicated and that reserves will be designated on the Robertson property; and
•  
while the schedule indicates a timeline for the overall project, the period after the completion of a prefeasibility study is subject to the results of that study.
 
 
 
 
Coral Gold Resources Ltd. 1-7 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


Figure 1-3: General Arrangement
 
 
 
Coral Gold Resources Ltd. 1-8 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
 
Figure 1-4: Development Schedule
 
 
 
Coral Gold Resources Ltd. 1-9 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

1.9  CAPITAL COSTS

The project initial capital costs, based upon 2011 dollars and Owner operation, to construct the facilities have been estimated at $122.1 million with expenditures of $16.5 million to develop the property. Ongoing costs are estimated at $54.2 million. The initial capital cost schedule is shown in Table 1.3 and ongoing cost Table 1.4 and is based upon budget estimates from suppliers for major items, cost data from Mining Cost Service, InfoMine USA, Inc. and in-house data. These costs are preliminary and should be considered as indicative.
 
An alternative case has been developed using a Nevada Contractor to develop and mine the open pits with the Owner operating all other facilities. The initial capital cost for this approach is $97 million with ongoing capital of $26.1 million. The initial capital cost is shown in Table 1.5 and the ongoing cost Table 1.6. Under this alternative the Contractor provides all the mining associated equipment which reduces the initial capital expenditures.
 
The capital costs are intended to reflect those costs that Coral would incur to further explore the Robertson property, complete environmental and permitting studies, obtain permits, environmental bonding of the property, purchase of all equipment, buildings and supplies, construct all facilities, preproduction development, commissioning all facilities, construct all surface infrastructure including leach pads and waste disposal areas and commence production.
 
Coral have an agreement with Albany Gold Corp. on all the claims on which the Robertson property sits. This agreement calls for a 3% NSR to be paid or a purchase payment of $1.25 million paid at any time to purchase outright the 3% NSR on the claims. It is understood from Coral representatives that this purchase would be made upon Coral making a construction decision. Thus this cost has been added to the capital cost estimate. Tenabo Gold Mines have a royalty on a claim that slightly covers non mineable Gold Pan mineralization.
 
Environmental bonding will be required by the USA and Nevada regulators prior to obtain the permit(s) to commence construction of the project. An allowance of $7.5 million has been added to the capital cost of the project to cover this item, based upon bonding requirements to those experienced for similar projects in Nevada. At the end of the life of the mine reclamation will be required and this has been estimated at a similar cost to the bond, $7 million. In addition if the reclamation is completed then the bonding would be returned to the company and this is included in the financials.
 
Salvage of equipment can be expected for the mobile equipment, ARD and crusher plant. The capital cost for these are some $45 million. A salvage allowance of 15% has been used amounting to $6.75 million.
 
The capital costs include allowances for Engineering, Procurement, Construction Management, Construction Indirects, Freight, Start-up and Commissioning and First Fills and Capital Spares. A contingency of 15% has been added to the estimated capital cost.

Ongoing capital costs are shown separately and include ongoing construction of the leach pads and replacement equipment that are used for maintaining operations.
 
 
 
Coral Gold Resources Ltd. 1-10 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Table 1.3: Capital Cost Summary $(000)'s (Owner Operated)
 
Description
 
2012
2013
2014
2015
2016
2017
Project Development
 
$4,157
$3,012
$3,076
$2,525
$1,616
$1,334
Plant and Surface Facilities
           
$40,758
Mining
           
$31,102
Indirect Costs
           
$22,399
Contingency
15.00%
$624
$452
$461
$379
$242
$14,946
Total Initial Capital
 
$4,780
$3,464
$3,538
$2,903
$1,859
$114,583
 
In addition there is a Bond of $7.5 million which gives a total of $122.1 million.
 
Table 1.4: Capital Cost Summary $(000)'s (Contractor Operated)
 
Description
 
2012
2013
2014
2015
2016
2017
Project Development
 
$4,157
$3,012
$3,076
$2,525
$1,616
$1,334
Plant and Surface Facilities
           
$40,758
Mining
           
$14,159
Indirect Costs
           
$17,486
Contingency
15.00%
$624
$452
$461
$379
$242
$11,667
Total Initial Capital
 
$4,780
$3,464
$3,538
$2,903
$1,859
$89,449

In addition there is a Bond of $7.5 million which gives a total of $97 million.
 
Table 1.5: Ongoing Capital Cost Summary $(000)'s (Owner Operated)
 
 
Year
 
Description
%
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
Total
Leach Pads
   
$3,122
$3,122
$3,122
$2,943
$2,943
$1,472
          $16,724
Replacement vehicles
5.00
 
$1,175
$1,175
$1,175
$1,175
$16,175
$1,175
$1,175
$1,175
$1,175
    $25,579
Reclamation
                       
$7,000
$7,000
Contingency
10.00
 
$430
$430
$430
$412
$1,912
$265
$117
$117
$117
 
$700
$4,930
Total
   
$4,727
$4,727
$4,727
$4,530
$21,030
$2,912
$1,292
$1,292
$1,292
 
$7,700
$54,233
 
Table 1.6: Ongoing Capital Cost Summary $(000)'s (Contractor Operated)
 
 
Year
 
Description
%
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
Total
Reclamation
10.00
 
$312
$312
$312
$294
$294
$147
       
$7,000
$7,000
Contingency                        
$700
$2,372
Total
   
$3,434
$3,434
$3,434
$3,237
$3,237
$1,619
       
$7,700
$26,096
 
 
 
 
Coral Gold Resources Ltd. 1-11 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

1.10 OPERATING COSTS
 
The operating costs have been estimated based upon prevailing labour rates for Nevada and the expected costs for supplies and materials. Efficiencies of equipment have been based upon costs developed by the suppliers of the equipment which reflects their operational experience. Overall costs have been compared to adjacent operations where possible. No contingency has been added. The average operating cost estimated to mine and process the mineralization is $5.28/t mined for the Owner operated base case and $6.45/t for the Contractor operation. This includes mining of mineral and waste, leaching, processing, general and administration and owners cost. The costs are indicative only and are in 2011 US$.
 
Table 1.7 shows a summary of the estimated cost by year and area for the Owner operated and Table 1.8 the Contractor operated alternative.
 
Table 1.7: Operating Cost Summary $(000)'s (Owner Operated)
 
Description
Cost/t
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
Total
Processed Ore (000)'s Ton
 
3,880
6,977
7,151
8,886
8,933
9,156
8,993
9,144
6,368
6,824
1,896
 
78,209
Total
 
$25,644
$38,500
$40,236
$43,854 $45,011 $45,426
$44,543
$46,625
$35,455 $34,621 $12,744  
$412,660
Yearly Cost/ton
$5.28
$6.61
$5.52
$5.63
$4.94
$5.04
$4.96
$4.95
$5.10
$5.57
$5.07
$6.72
 
$5.28

Table 1.8: Operating Cost Summary $(000)'s (Contractor Operated)
 
Description
Cost/t
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
Total
Processed Ore (000)'s Ton
 
3,880
6,977
7,151
8,886
8,933
9,156
8,993
9,144
6,368
6,824
1,896
 
78,209
Total
 
$33,741
$45,271
$48,182
$51,389
$59,206
$59,465
$56,309
$55,790
$41,635
$40,283
$13,554
 
$504,826
Yearly Cost/ton
$6.45
$8.70
$6.49
$6.74
$5.78
$6.63
$6.49
$6.26
$6.10
$6.54
$5.90
$7.15
 
$6.45

1.11    FINANCIAL ANALYSIS

The financial analysis has been prepared using standard discounted cash flow methods to determine the NPV and IRR of the project based upon 100% equity financing and metal price of US$1350/oz Au for the Base Case. This gold price is based on the trailing three year average. The analysis was performed in constant 2011 US dollars, excluding inflation. Various sensitivities have been completed to determine the effect of changes to metal prices, grade, capital costs, operating costs and leach recovery.
___________________________
 
It should be noted that the authors of this report have not and do not forecast the future price of gold. The alternatives shown in this report are intended to indicate the variation of the project financials based upon sensitivity criteria shown.
 
 
 
Coral Gold Resources Ltd. 1-12 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

1.12 RESULTS

1.12.1 Base Case (Owner Operated)

Case 1 economic evaluation is are based on an initial construction capital expenditure of US$122.1 million operating cost of $5.28/ton mined and metal prices of US$1350/oz4. The project will generate an after-tax IRR of 15.44% and an NPV of US$180.6 million undiscounted and US$97 million discounted at 5%. Payback of initial capital can be achieved in 5.91 years. The inferred resources established in this study are 78.2 million tons grading 0.0138 oz/t of gold.
 
Case 1 financial analysis summary is shown on Table 1.9.

Case 5 reflects a gold price of US$1500/oz. Under this scenario the project will generate an after-tax IRR of 20.03% and an NPV of US$247.2 million undiscounted and US$147.1 million discounted at 5%. Payback of initial capital can be achieved in 4.72 years.
 
Case 7 reflects a gold price of US$1750/oz. Under this scenario the project will generate an after-tax IRR of 27.24% and an NPV of US$358.3 million undiscounted and US$230.7 million discounted at 5%. Payback of initial capital can be achieved in 3.91 years.
 
Sensitivity studies have been prepared varying the price of gold, the operating and capital cost, grade and leach recovery. The project is most sensitive to gold price, sensitive to operating cost, grade and recovery and least sensitive to capital cost. The sensitivity results are shown on Table 1.10.

It should be noted that the financial analysis has been evaluated on the basis of the construction activities being set against proceeds and those costs for the period to a construction decision have been included as sunk costs although these development costs have not been incurred at the time of writing this report. This is considered as an acceptable approach since any decision to construct will be based upon the financial analysis at the time following completion of the development activities. Thus the expenditures for construction only are set against the proceeds of the project and not the development costs. To include the development costs in the capital costs will not provide a basis for a fair evaluation of the project.
 
 
 
Coral Gold Resources Ltd. 1-13 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Table 1.9: Financial Analysis (Owner Operated)
 
ROBERTSON PROJECT
ALTENBURG, PORPHYRY AND GOLD PAN DEPOSITS
Financial Analysis Base Case
$(000)s
 
Resource Ton (000)'s                                             78,209                                                                                          YEAR
 
Description
-3
-2
-1
1
2
3
4
5
6
7
8
9
10
11
12
Total
Production Ton/year HG
     
439
1,436
2,687
2,198
2,877
2,903
3,528
4,596
2,696
2,496
652
 
26,509
Au Grade oz/t
     
0.017
0.019
0.021
0.019
0.019
0.019
0.020
0.023
0.022
0.024
0.021
 
0.021
Recovery Au %
     
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
 
67.00%
Production Ton/year LG
     
3441
5541
4464
6688
6056
6253
5465
4549
3673
4328
1244
 
51,700
Au Grade oz/t
     
0.010
0.010
0.010
0.010
0.011
0.010
0.011
0.010
0.010
0.010
0.010
 
0.010
Recovery Au %
     
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
 
45.00%
Au ounces payable
     
20,277
42,619
57,438
58,180
65,106
66,406
73,156
90,776
55,848
59,364
14,942
 
604,111
Gross Revenue
     
$ 27,350
$ 57,487
$ 77,476
$ 78,477
$ 87,819
$ 89,572
$ 98,678
$122,444
$ 75,332
$ 80,074
$ 20,155
 
342,699
Operating Costs
     
$(25,644)
$(38,500)
$(40,236)
$(43,854)
$(45,011)
$(45,426)
$(44,543)
$(46,625)
$(35,455)
$(34,621)
$(12,744)
 
($412,660)
Income Tax
     
$   (29)
$    (315)
$ (1,115)
$ (1,822)
$ (3,409)
$ (4,622)
$ (5,857)
$(20,477)
$ (9,084)
$(11,167)
$ (1,608)
 
($59,506)
Revenue Before Capital Exp.
   
$1,677
$18,672
$36,125
$32,800
$39,399
$39,525
$48,278
$55,342
$30,793
$34,286
$5,803
 
$342,699
Capital Expenditures
                               
- Development/Construction
   
($114,583)
                       
($114,583)
- On-Going Capital
       
($4,727)
($4,727)
($4,727)
($4,530)
($21,030)
($2,912)
($1,292)
($1,292)
($1,292)
   
($46,528)
Working Capital Change
     
($3,039)
($1,697)
               
$4,735
   
Reclamation Bond
   
($7,500)
                     
$7,500
 
Reclamation
                           
($7,700)
($7,700)
Salvage
                           
$6,750
$6,750
Total Capital
   
($122,083)
($3,039)
($6,423)
($4,727)
($4,727)
($4,530)
($21,030)
($2,912)
($1,292)
($1,292)
($1,292)
$4,735
$6,550
($162,061)
Net Cashflow
   
($122,083)
($1,362)
$12,249
$31,399
$28,074
$34,869
$18,495
$45,366
$54,050
$29,500
$32,993
$10,538
$6,550
$180,638
Discounted NCF 5%
   
($122,083)
($1,297)
$11,110
$27,123
$23,096
$27,321
$13,801
$32,241
$36,583
$19,016
$20,255
$6,161
$3,647
$96,976
Discounted NCF 8%
   
($122,083)
($1,261)
$10,501
$24,925
$20,635
$23,732
$11,655
$26,471
$29,201
$14,758
$15,282
$4,520
$2,601
$60,937
Discounted NCF 10%
   
($122,083)
($1,238)
$10,123
$23,590
$19,175
$21,651
$10,440
$23,280
$25,215
$12,511
$12,720
$3,694
$2,087
$41,164
 
Rate of Return 15.44%      
Notes:     Payback 5.91     years
1. Metal Prices US $ Ai 1350.00   Au first full production year 20,277 ozs
2. Capital requirements based on 100% equity.   4. Taxes are approximate. Average NSR/ton $10.42
3. All funds are in US$ except where noted.        
 
 
 
 
Coral Gold Resources Ltd. 1-14 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Table 1.10: Sensitivities (Owner Operator)
 
Case
Description of Sensitivity
NPV Dis.0%
NPV Dis.5%
NPV Dis.8%
IRR
   
US$(000)s
US$(000)s
US$(000)s
%
 
CASE 1 Base Case $180,638 $96,976 $60,937 15.44%
 
Case 2
CASE3
Gold Price $850/oz
Gold Price $1100/oz
($57,729)
$79,451
($84,166)
$19,046
($94,825)
($6,612)
-6.12%
7.15%
CASE 1
Base Case
$180,638
$96,976
$60,937
15.44%
CASE5
CASE6
CASE7
Gold Price $1500/oz
Gold Price $1750/oz
Gold Price $2000/oz
$247,156
$358,295
$464,197
$147,053
$230,661
$310,181
$103,770
$175,241
$243,159
20.13%
27.24%
33.41%
 
CASE8
CASE9
Grade -10%
Grade -5%
$124,051
$151,823
$54,202
$75,315
$24,232
$42,414
11.07%
13.29%
CASE 1
Base Case
$180,638
$96,976
$60,937
15.44%
CASE10
CASE11
Grade +5%
Grade +10%
$209,974
$240,183
$119,021
$141,688
$79,779
$99,127
17.55%
19.62%
 
CASE12
CASE13
Capital Cost -20%
Capital Cost -10%
$188,904
$184,771
$103,569
$100,272
$66,733
$63,835
16.13%
15.79%
CASE 1
Base Case
$180,638
$96,976
$60,937
15.44%
CASE14
CASE15
Capital Cost +10%
Capital Cost +20%
$176,505
$172,372
$93,679
$90,382
$58,039
$55,141
15.09%
14.75%
 
CASE16
CASE17
Operating Cost -20%
Operating Cost -10%
$239,844
$209,805
$142,662
$119,521
$100,598
$80,533
20.04%
17.74%
CASE 1
Base Case
$180,638
$96,976
$60,937
15.44%
CASE18
CASE19
Operating Cost +10%
Operating Cost +20%
$152,031
$124,961
$74,793
$53,382
$41,610
$22,744
13.12%
10.80%
 
CASE20
CASE 21
Leach Recovery +10%
Leach Recovery +5%
$240,183
$209,974
$141,688
$119,021
$99,127
$79,779
19.62%
17.55%
CASE 1
Base Case
$180,638
$96,976
$60,937
15.44%
CASE 22
CASE23
Leach Recovery -5%
Leach Recovery -10%
$151,823
$124,051
$75,315
$54,202
$42,414
$24,232
13.29%
11.07%
 
 
 
Coral Gold Resources Ltd. 1-15 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

1.12.2 Results Alternative Case A1 (Contractor Operated)

Case A1 economic evaluation is are based on an initial construction capital expenditure of US$97 million operating cost of $6.45/ton mined and metal prices of US$1350/oz. The project will generate an after-tax IRR of 15.43% and an NPV ofUS$159.4 million undiscounted and US$85.2 million discounted at 5%. Payback of initial capital can be achieved in 5.94 years.

Case A1 financial analysis summary is shown on Table 1.11.
 
Case A5 reflects a gold price of US$1500/oz. Under this scenario the project will generate an after-tax IRR of 20.96% and an NPV of US$226.4 million undiscounted and US$135.9 million discounted at 5%. Payback of initial capital can be achieved in 4.86 years.

Case A7 reflects a gold price of US$1750/oz. Under this scenario the project will generate an after-tax IRR of29.18% and an NPV of US$337.8 million undiscounted and US$219.7 million discounted at 5%. Payback of initial capital can be achieved in 3.82 years.

Sensitivity studies have been prepared varying the price of gold, the operating and capital cost, grade and leach recovery. The project most sensitive to gold price, sensitive to operating cost, grade and recovery and least sensitive to capital cost. The sensitivity results are shown on Table 1.12.
 
 
 
Coral Gold Resources Ltd. 1-16 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Table 1.11: Financial Analysis Alternative 1 (Contractor Operated)
 
ROBERTSON PROJECT
ALTENBURG, PORPHYRY AND GOLD PAN DEPOSITS
Financial Analysis Base Case
$(000)s
 
Resource Ton (000)'s                                             78,209                                                                                    YEAR
 
Description -3 -2 -1 1 2 3 4 5 6 7 8 9 10
11
12
Total
Production Ton/year HG
     
439
1,436
2,687
2,198
2,877
2,903
3,528
4,596
2,696
2,496
652
 
26,509
Au Grade oz/t
     
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
 
0.02
Recovery Au %
     
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
 
67.00%
Production Ton/year LG
     
3441
5541
4464
6688
6056
6253
5465
4549
3673
4328
1244
 
51,700
Au Grade oz/t
     
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
 
0.01
Recovery Au %
     
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
 
45.00%
Au ounces payable
     
20,277
42,619
57,438
58,180
65,106
66,406
73,156
90,776
55,848
59,364
14,942
 
604,111
Gross Revenue
     
27,350
57,487
77,476
78,477
87,819
89,572
98,678
122,444
75,332
80,074
20,155
 
268,219
Operating Costs
     
(33,741)
(45,271)
(48,182)
(51,389)
(59,206)
(59,465)
(56,309)
(55,790)
(41,635)
(40,283)
(13,554)
 
($504,826)
Income Tax      
($29)
($210)
($205)
($107)
($169)
($214)
($3,617)
 ($17,845)
($7,572)
($9,799) ($2,053)  
($41,819)
Revenue Before Capital Exp.
   
($6,420)
$12,006
$29,090
$26,981
$28,445
$29,893
$38,752
$48,809
$26,125
$29,991
$4,548
 
$268,219
Capital Expenditures
                               
- Development/Construction
   
($89,449)
                       
($89,449)
- On-Going Capital
       
($3,434)
($3,434)
($3,434)
($3,237)
($3,237)
($1,619)
         
($18,396)
Working Capital Change
     
($3,039)
($1,697)
               
$4,735
   
Reclamation Bond
   
($7,500)
                     
$7,500
 
Reclamation
                           
($7,700)
($7,700)
Salvage
                           
$6,750
$6,750
Total Capital
   
($96,949)
($3,039)
($5,131)
($3,434)
($3,434)
($3,237)
($3,237)
($1,619)
     
$4,735
$6,550
($108,795)
Net Cashflow
   
($96,949)
($9,459)
$6,875
$25,656
$23,547
$25,207
$26,656
$37,132
$48,809
$26,125
$29,991
$9,283
$6,550
$159,424
Discounted NCF 5%
   
($96,949)
($9,008)
$6,236
$22,162
$19,372
$19,751
$19,891
$26,389
$33,036
$16,840
$18,412
$5,428
$3,647
$85,207
Discounted NCF 8%
   
($96,949)
($8,758)
$5,895
$20,366
$17,308
$17,156
$16,798
$21,666
$26,370
$13,069
$13,892
$3,981
$2,601
$53,394
Discounted NCF 10%
   
($96,949)
($8,599)
$5,682
$19,275
$16,083
$15,652
$15,047
$19,055
$22,770
$11,079
$11,563
$3,254
$2,087
$35,999
 
Rate of Return 15.43%      
Notes:     Payback 5.94    years
1. Metal Prices US $ Au 1350.00   Au first full production year 20,277 ozs
2. Capital requirements based on 100% equity.   4. Taxes are approximate. Average NSR/ton $10.42
3. All funds are in US$ except where noted.        
         
 
 
 
 
Coral Gold Resources Ltd. 1-17 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Table 1.12: Sensitivities - Alternative 1 (Contractor Operated)
 
Case
Description of Sensitivity
NPV Dis.0%
NPV Dis.5%
NPV Dis.8%
IRR
   
US$(000)s
US$(000)s
US$(000)s
%
 
CASE A1 Base Case $159,424 $85,207 $53,394 15.43%
 
Case A2
CASE A3
Gold Price $750
Gold Price $1000
($94,427)
$50,380
($107,304)
$624
($111,909)
($20,123)
-11.84%
5.08%
CASE A1
Base Case
$159,424
$85,207
$53,394
15.43%
CASE A5
CASE A6
CASE A7
Gold Price $1500
Gold Price $1750
Gold Price $2000
$226,426
$337,781
$445,057
$135,895
$219,732
$300,377
$96,886
$168,591
$237,512
20.96%
29.18%
36.41%
 
CASE A8
CASE A9
Grade -10%
Grade -5%
$106,068
$132,368
$43,645
$64,225
$17,154
$35,138
10.42%
12.94%
CASE A1
Base Case
$159,424
$85,207
$53,394
15.43%
CASE A10
CASE A11
Grade +5%
Grade +10%
$189,244
$219,453
$107,787
$130,521
$72,784
$92,229
17.95%
20.37%
 
CASE A12
CASE A13
Capital Cost -20%
Capital Cost -10%
$162,796
$161,071
$88,022
$86,587
$55,930
$54,640
15.80%
15.62%
CASE A1
Base Case
$159,424
$85,207
$53,394
15.43%
CASE A14
CASE A15
Capital Cost +10%
Capital Cost +20%
$157,789
$156,204
$83,836
$82,502
$52,156
$50,949
15.25%
15.08%
 
CASE A16
CASE A17
Operating Cost -20%
Operating Cost -10%
$232,745
$195,890
$142,161
$113,650
$103,028
$78,244
22.14%
18.84%
CASE A1
Base Case
$159,424
$85,207
$53,394
15.43%
CASE A18
CASE A19
Operating Cost +10%
Operating Cost +20%
$127,084
$95,153
$59,049
$32,755
$30,099
$6,515
12.14%
8.88%
 
CASE A20
CASE A21
Leach Recovery +10%
Leach Recovery +5%
$219,453
$189,244
$130,521
$107,787
$92,229
$72,784
20.37%
17.95%
CASE A1
Base Case
$159,424
$85,207
$53,394
15.43%
CASE A22
CASE A23
Leach Recovery -5%
Leach Recovery -10%
$132,368
$106,068
$64,225
$43,645
$35,138
$17,154
12.94%
10.42%
 
 
 
Coral Gold Resources Ltd. 1-18 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

1.13    CONCLUSIONS
 
The following is a list of the conclusions;
 
1.  
The Robertson property is one of merit upon which further work is warranted consisting of exploration and definition drilling, metallurgical test work, geotechnical test work and associated work that will allow the preparation of a project evaluation to a prefeasibility level.
2.  
The relative low capital cost provides an opportunity for a junior company such as Coral to raise those funds and operate the project.
3.  
The project is seen as one where a contractor operation would be beneficial due to the increased operating cost is offset by the lower capital cost expenditures.
4.  
The Nevada project approval system has elongated the development period for the project. Every effort should be made to attempt to reduce the time to achieve regulatory approval of the project and allow the project to be developed as quickly as is feasible.
5.  
The financial analysis results indicate that the project breaks even at US$950/oz gold for the Owner operation and US$1010/oz for the Contractor alternative.
 
1.14    RECOMMENDATIONS
 
It is recommended that the project be developed in two stages. The first is that work required to take the project to completion of a prefeasibility report and the second work required to complete a full “bankable” feasibility, i.e., one on which a construction decision could be made. Costs have been estimated for stage 1 and the cost for stage 2 have been included in the capital cost section for guidance only; stage 2 costs will be defined in the report derived from stage 1.
 
The work in stage 1 consists of;
 
1.  Exploratory and definition drilling.
2.  Metallurgical test work program.
3.  Environmental program.
4.  Geotechnical and associated work.
5.  A prefeasibility study.
 
A summary of stage 1, estimated to cost $7.9 million, is shown on Table 1.13. Cost breakdowns are shown on Tables 1.14, 1.15 and 1.16.
 
Table 1.13: Summary of Expenditures for Stage 1
 
Description
Estimated Cost $
Royalty and Regulatory Fees
$351,680
Exploratory and definition drilling
$2,817,000
Metallurgical test work program
$900,000
Environmental program
$1,826,138
Preliminary Feasibility Study
$1,495,000
Contingency
$510,182
Total
$7,900,000

 
1.14.1 Exploration and Definition Drilling
 
It is recommended that Coral conduct a two phase exploration program focused on expanding and up-grading the near-surface oxide and sulfide inferred mineral resources to measured and indicated.
 
The Phase I should consist of drilling 40 HQ diameter diamond core holes and 42 RC holes having an average depth of 400-500 ft and totaling about 40,000 ft in the;
 
Porphyry Zone: “Twinning” 10 percent (20 holes) of the historic drill holes by diamond core drilling to determine if “historic” Amax drilling data can be used with confidence to upgrade the level of confidence in the resources. In addition an additional 17 RC holes, totaling about 7,600 ft, to be drilled along the west and south boundaries of the Porphyry Zones to test for possible extensions to mineralization.
 
 
 
 
Coral Gold Resources Ltd. 1-19 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Altenburg Hill/South Porphyry Area: Twenty-five RC holes totaling 12,400 ft.
 
Gold Pan Zone: Twenty wide-spaced diamond core holes totaling 10,000 ft to verify continuity and grade retuned in historic drilling.
 
Altenburg Hill/South Porphyry: Base on results on the Phase I RC drilling follow up diamond core drilling (20 holes) is conducted in these areas.
 
Phase one drilling is expected to cost $2 million with the second Phase $800,000 for a total cost including contingency of $2.8 million.
 
1.14.2 Metallurgical Test Work Program
 
Variability testing will be performed on samples obtained both spatially and at depth for the oxide and transition to sulfide ore zones. This work will encompass;
 
prepare composite material representing larger zones of each deposit to define the crush size and other process conditions;.
crushing work index and abrasion testing;
mineralogical evaluation of column feed and products;
extensive column work to determine optimum crush size and other process conditions;
similar testing as was performed on oxide materials to be done on sulfide and transition zone materials;
additional processing parameters to be investigated including reagent use and concentrations;
leach evaluation on below the cut-off grades of the various deposits was classified as waste based on dump leaching of run of mine low grade materials;
laboratories testwork up to 10 tons of 100% minus 300 mm (~12”) feed.
 
Table 1.14: Proposed Test Work to Prefeasibility
 
Description
Est Cost $
Oxide / Partially Oxidized High Grade Drill Core
$350,000
Sulfide and Transition High Grade Drill Core
$200,000
Low Grade Bulk Tonnage Samples
$350,000
Total
$900,000
 
1.14.3 Environmental Work
 
The proposed environmental work consists of the following as shown in Table 1.15. It is expected based upon present legislation to be complete and the project approved in 2017. It may be possible to reduce this period and it is recommended that every effort be made to achieve this.
 
 
 
Coral Gold Resources Ltd. 1-20 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Table 1.15: Summary of Proposed Environmental work
 
 
1.14.4 Geotechnical and Associated Investigations
 
The proposed geotechnical and associated investigation costs are included in the feasibility costs estimates. It is planned to geotechnically log the core holes drilled as part of the exploration program. This information together with the list below will form the basis for this work.
 
Evaluation of the allowable soil bearing pressures induced by plant site facilities for a range of different footing shapes and sizes, and consideration of potential settlements
Estimation of the allowable bearing pressures of the bedrock
Seismic design parameters for the plant site, and
Test pits in the leach pad area to investigate foundation conditions, overburden materials, and depth to bedrock.
Drill holes to investigate depth and quality of bedrock, for permeability testing, and for the installation of groundwater monitoring wells.
Additional test pits to prove suitability, availability and quantity of borrow materials for earthworks construction.
Additional laboratory index test works (including compaction tests) on potential borrow materials.
Strength and permeability test work on potential borrow materials for pad foundation and embankment construction.
Direct shear testing of the geosynthetic liner interfaces, to determine interface friction angles for stability assessment.
Ore testing (including gradation, load-permeability, and load-density).
 
 
 
 
Coral Gold Resources Ltd. 1-21 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

1.14.5 Prefeasibility Study
 
The expected cost to complete a prefeasibility study, based upon the results of the PEA as described in this report, is $1.495 million.
 
Table 1.16 shows the cost estimate breakdown for the Prefeasibility Study.
 
Table 1.16: Prefeasibility Cost Estimate
 
 
 
 
Coral Gold Resources Ltd. 1-22 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

SECTION 2.0 INTRODUCTION
 
2.1 SCOPE OF WORK
 
Coral Gold Resources Ltd. (Coral) requested Beacon Hill Consultants (1988) Ltd. (Beacon Hill) to prepare a Preliminary Economic Assessment (PEA) on the Robertson Property containing a number of gold bearing zones, located in Lander County, Nevada, USA. The evaluation was to review the Altenburg Hill, Porphyry and Gold Pan zones only and include recent additional drilling and metallurgical work completed in 2010 and 2011. The PEA has been prepared to meet the NI 43- 101 criteria for a technical report.
 
2.2  PROJECT CRITERIA
 
Unless otherwise indicated all references to dollars (US$) used in this report refer to currency of the United States.
 
Units of measure, conversion factors and abbreviation frequently used in this report include: Units of measure and conversion factors used in this report (from SME-AIME):
 
1 inch = 2.54 centimeters
 
10 parts per billion = 0.0029 troy ounces/short ton
1 foot = 0.3048 meters
 
1 part per million = 0.029 troy ounces/short ton
1 mile = 1.61 kilometers
 
1 troy ounce/short ton = 34.2857 grams/metric ton
1 acre = 0.4047 hectares
 
1 gram/metric ton = 0.02917 troy ounces/short ton
1 square mile = 640 acres
 
1 short ton = 2,000 pounds
640 acres = 259 hectares
 
1 short ton = 0.907 metric tons
1 pound = 0.454 kilograms
   
 
Abbreviations used frequently in this report:
 
AA
Atomic absorption spectrometry
Pb
Lead
Au
Gold
ppb
Parts per billion
Ag
Silver
ppm
Parts per million
As
Arsenic
oz/t
Troy ounces/short ton
Bi
Bismuth
ROM
Run of mine
Cu
Copper
RC
Reverse circulation drilling
DDH
Diamond drill hole (core)
Sb
Antimony
ft
Feet
Zn
Zinc
Hg
Mercury
   
ICP
Inductively coupled plasma spectrophotometry
i.d.
Inside diameter
   
ID
Identification
   
Ma
Million years ago
   
Mo
Molybdenum
   
NaCN
Sodium cyanide
   
NE
Northeast
   
NW
Northwest
   
NNW
North-northwest
   
 
 
 
 
Coral Gold Resources Ltd. 2-1 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

2.3  PROJECT MANAGEMENT
 
Beacon Hill Consultants (1988) Ltd. has compiled this report, providing the overall study co­ordination, as well as certain engineering elements within the study. The team completing the work is shown below.
 
2.4  TEAM MEMBERS
 
The team consisted of:
 
Beacon Hill Consultants (1988) Ltd. personnel and associates;
 
·    W. P. Stokes, P.Eng., Project Manager and Mining Engineer
·    G. Kirkham, P.Geo., Associate Geologist and Geoscientist
·    R.W. J Fox, P.Eng., Metallurgist
 
Independent Metallurgist
 
·    F. Wright, P.Eng.
 
Independent Geological Consultant;
 
·    Robert T. McCusker, P.Geo. Knight Piésold Ltd.;
 
Knight Piésold Ltd.;
 
·    K. J. Brouwer, P.Eng. Managing Director
·    C. Aurala, P.Eng., Project Manager
 
Ledcor CMI Inc.
 
Nevada Contractor
 
2.5   DATA SUPPLIED BY CORAL
 
Coral has supplied the surface topography for the area; all the geological data, assay and associated data to allow for the resource modeling and estimation to be completed.
 
2.6   EVALUATION CRITERIA
 
The evaluation was based on two approaches;
 
Base Case; The Owner was operator for all operations at the mine and mineral processing activities.
 
Alternative A; A contractor operation to mine the mineral and waste and deliver that to the crusher, low grade stockpile and the waste deposition area; the Owner would be operator and responsible for all other activities.
 
 
 
Coral Gold Resources Ltd. 2-2 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

SECTION 3.0 RELIANCE ON OTHER EXPERTS
 
The authors have relied on the experience and expertise of the on-site geology personnel for input with respect to the interpretation of recovery data and also the interpretation of geology, mineralization, and specific gravity data. The authors believe these interpretations to be a current and an accurate representation of the deposit.
 
 
 
 
Coral Gold Resources Ltd. 3-1 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

SECTION 4.0 PROPERTY DESCRIPTION AND LOCATION 4.1 LOCATION
 
The Robertson Property is located in eastern Lander County, Nevada, on public lands administered by the Bureau of Land Management (BLM). The property is situated in Sections 2-10, 15-18, 20, 21, Township 28 North, Range 47 East and Sections 26, 32 and 34, Township 29 North, Range 47 East, Mt. Diablo Baseline & Meridian (Figure 4-1).
 
4.2   MINING CLAIM DESCRIPTION
 
The Robertson Property consists of 510 unpatented federal lode, 90 placer claims, nine patented lode claims and one unpatented mill site, covering approximately 7,300 acres (Figure 4-2). The claim total includes two no-contiguous groups of claims totaling 82 claims that are also controlled by Coral. Coral Resources, Inc. owns or controls the surface and mineral estates within the project area through record title, or through mining lease and mining lease with option to purchase agreements of the patented and unpatented mining claims. At the end of 2010, Coral was record owner with 100 percent interest in 525 claims and controls an additional 76 claims through a variety of mineral leases. A comprehensive title search of these claims was completed in 2007 by Harris & Thompson, a Reno, Nevada law firm, which found no major title issues. The authors of this report have not completed a title search or verified the ownership of the claims and have relied upon the legal advice given by Coral.
 
4.3   AGREEMENTS AND ENCUMBRANCES
 
In 1986, Coral Gold Corporation and its US affiliate Coral Resources, Inc., acquired an option to acquire a 70 percent interest in the “mining properties” owned or controlled by Aaron Mining and its affiliates, in the Tenabo mining district, Nevada, under an Option and Joint Venture agreement. Coral was granted an undivided 70 percent interest in the Tenabo mining properties in 1987. Also in 1987, Coral and its affiliate, acquired an undivided 29 percent interest in the “Tenabo Properties” from Geomex Development, Inc. (predecessor-in-interest to Albany Gold Corp.). Geomex had acquired its interest from E & B Exploration, who explored the property under a 1980 Option Agreement with Aaron Mining Ltd. As part of Coral’s acquisition of the Geomex interest, Geomex reserved a 3 percent Net Smelter Return Royalty covering all of the “Tenabo Properties”, including all mining claims owned or controlled by Coral, or its affiliates, in Lander County, Nevada. This royalty has an option to purchase for $1,250,000.
 
In 1990, Coral and Amax Gold Exploration, Inc. (“Amax”) entered into an Amended and Restated Option and Earn-In Agreement in which Amax could earn a 60 percent interest in the property by producing a bankable feasibility study. A feasibility study was completed by Amax in November, 1994, but because of marginal economics of the project, the parties determined that additional exploration was necessary. Both companies agreed that Amax did not fulfill the requirements of the agreement and did not earn any interest in the property. Amax withdrew from the project in 1996.
 
In 1995, Coral and Amax agreed to “carve out” 219 claims (the “Excluded Claims”) from the original block of 755 claims and place them under a separate Earn-In and Mining Venture Agreement. In 1996, Amax withdrew from the 1990 agreement but maintained its interest in the agreement covering the “Excluded Claims”. Cortez acquired the Amax interest in the “Excluded Claims” and in 1998, Coral and Cortez signed an Option and Earn-In Agreement covering the Robertson Property (non-Excluded Claims). After completing an exploration program on the Robertson Property in 1999, Cortez withdrew from the Option and Earn-In Agreement. Under terms of the agreement, Cortez did not earn an interest in the property.
 
 
 
Coral Gold Resources Ltd. 4-1 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

In December 2004, Coral and Agnico-Eagle (USA), Ltd., then known as Nevada Contact, Inc., entered into an agreement covering 71 mining claims owned by Mauzy et al. and controlled by Coral through a 1989 Mineral Lease and Purchase Option (amended). Coral assigned and subleased the underlying 1989 Mauzy Agreement to Agnico-Eagle, along with the obligation to pay required lease payments under the Mauzy Agreement and minimum advance royalty payments to Coral. Coral also reserved a 2.5 percent net smelter return production royalty. In 2007, Agnico-Eagle withdrew from the agreement without earning an interest in the property.
 
As part of the Coral-Agnico agreement, the parties agreed to amend the underlying 1989 Mineral Lease and Purchase Option Agreement with Mauzy et al. The amendment included extending the term of the agreement, reducing the royalty to 2 percent of the net smelter return and adjusting the purchase price for all claims subject to the agreement.
 
In 2005, Coral acquired 39 unpatented lode claims and two association placer claims, covering approximately 960 acres, within the Robertson project area, from the Marcus Corporation. Under a Share Exchange Agreement dated July 12, 2005, Marcus shareholders were offered one common share of Coral stock for 4 common shares of Marcus stock and one warrant for additional common shares of Coral stock at a reduced fixed price for every 2 common shares of Marcus stock. As of December 2005, Coral had acquired 1,391,860 shares, or 99.98 percent, of the outstanding Marcus common shares. Certain of the Marcus claims cover portions of the Altenburg Hill inferred resource.
 
Twenty of the claims acquired as part of the Marcus acquisition include the Ruf unpatented lode claims which are subject to a 1995 Option and Joint Venture Agreement with Levon Resources Ltd. In 2002, after incurring a minimum $200,000 in exploration expenditures, as required under terms of the agreement, Levon was deemed to have earned an undivided one-third interest in the Ruf claims.
 
In 2008, Coral entered into a Mineral Lease and Option to Purchase Agreement with Dianne Breckon et al, owners of the June 1-6 unpatented lode claims. Terms of the agreement include annual rental payments of $25,000, renewable in successive 4 year terms, provided the rent increases by $5,000 every four years. The property is subject to a 3% NSR which can be purchased for $3,000,000 and the property for $1,000,000.
 
During 2007, Coral exercised its option to purchase 76 unpatented lode and placer claims and 6 patented mining claims owned by Elwood Wright and 16 unpatented lode claims owned by Florence Johnson.
 
Approximately 76 of the 601 claims that comprise the Robertson Property are controlled by Coral through six mining leases and option agreements. Total annual payments for the various leases and minimum advance royalties or rental payments are US$91,700. A summary compilation of the terms of these agreements are presented in Table 4.1. The location of claims subject to the various production royalties are shown in Figure 4-2. It should be noted that a 3% NSR royalty owned by Albany Gold Corp. applies to all Coral-owned mining claims within the Robertson project area, as well as throughout Lander County, Nevada.
 
 
 
 
Coral Gold Resources Ltd. 4-2 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Table 4.1: Tabulation of Mining Lease and Option Agreements.
 
Company/Date
Number
Option
Production
Advance
 
of Claims
Pmt.
Royalty
Royalty Pmt.
Tenabo Gold Mining Co
13
$2M
8% NSR
$12,000/yr
Nov. 30, 1975
       
Northern Nevada Au, Inc
12
$0.3M
4% GSR
$9,600/yr
Sept. 30, 1986
       
Albany Gold Corp.
All
$1.25M
3% NSR
None
(Geomex)
       
Mauzy, et al
36
$1.15M
2% NSR
$23,500/yr
Apr. 21, 1989
       
Jay Wintle
9
 
5% NSR
$21,600/yr
Mar. 1, 1992
       
Breckon, et al
6
$1.0M
3% NSR
$25,000/yr
Mar. 22, 2008
       

Annual federal rental fees of US$84,140 payable to the BLM and Notice of Intent to Hold Mining Claims fee of US$6,310.50 payable to Lander County have been paid for the 2011-2012 assessment year.
 
Effective September 2004, Coral changed its name from Coral Gold Corporation to Coral Gold Resources Limited. The company is listed on the TSX Venture Exchange.
 
4.4   ENVIRONMENTAL LIABILITIES
 
In 1988-89, Coral operated a small open pit gold mining operation and heap leach facility on the Robertson Property. The resulting disturbances include three small open pit mines, waste dumps, haul roads, drill roads, open drill holes, and a 350,000 ton heap leach facility and related recovery plant. In 1994, a reclamation plan was prepared by Amax and submitted to the Mount Lewis Field Office (formally the Battle Mountain office) of the BLM. The cost to perform the reclamation of the Robertson mine site was estimated at that time to be $2 million. In 2001, Coral began reclamation activities which were accelerated in 2002, with the recontouring of waste dumps, reclamation of the leach pad, haul roads and the filling of all open drill holes. As a result of this activity, in June, 2003, the BLM lowered the bonding requirements for the project to $406,000.
 
In March 2003, on behalf of Coral, SRK Consulting submitted a Final Plan for Permanent Closure with the BLM and Nevada Division of Environmental Protection (NDEP) which was approved by both agencies. The major component of the closure plan was the installation of a site fluid management system. During 2004, a terminal evapo-transpiration basin with a designed annual evapo-transpire capacity of 422,300 gallons per year was constructed. In 2007, the recovery plant was dismantled and removed from the property and additional road and drill site reclamation was completed. As a result of this work, the BLM lowered the bonding requirements to $352,934. Coral currently maintains a state wide performance bond totaling $63,650 with the Nevada State Office of the BLM covering its various drilling programs conducted under a Notice of Intent (TRY/View).
 
Coral’s current reclamation obligation at Robertson is $352,934, covering 209.5 acres of disturbance.
 
 
 
Coral Gold Resources Ltd. 4-3 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

4.5 PERMITTING
 
In 2010, Coral submitted and was granted a five year renewal of Water Pollution Control Permit (NEV60035) by the NDEP. In addition, Coral continues to conduct reclamation and exploration activities under a Plan of Operation (NVN-067688) approved in 1989 by the BLM. In 2007, Coral conducted drilling operations in the extreme northwest part of the Robertson core property under a Notice of Intent NVN-083095 (TRY/View Notice).
 
During the period 2000 through 2003, no exploration activity was conducted on the Robertson Property. However, during that period a significant amount of surface reclamation was completed on the property. As a result, new exploration activities in reclaimed areas will require submission and approval of an Amendment to the Plan of Operation. Additionally, the National Historic Preservation Act requires that all operators on public lands conduct an archeological survey of the proposed sites of new disturbance. Much of the core Robertson Property has been previously cleared under various surveys conducted by Amax. Recent and planned future exploration activities by Coral have moved outside the area covered by previous archeological surveys. It is possible that future exploration will experience delays in receiving approval because additional surveys will be required by state and federal agencies. In 2004-06, Coral conducted exploratory drilling under a series of amendments to the Plan of Operation which were approved by the Mount Lewis Field office of the BLM and NDEP.
 
In 2007, NDEP requested that Coral prepare and submit a new Plan of Operation consolidating all of the past modifications and amendments to the previous plan into one document. The new plan was submitted in November 2007 and approval was granted in July 2008.
 
Coral submitted a new Amended Plan of Operation (APO) to the Mount Lewis Field office of the BLM in April 2010 to cover proposed drilling operations on approximately 5,169 acres of the Robertson core claims. After reviewing the APO, the BLM determined that Coral would be required under the National Environmental Policy Act (NEPA) to produce an Environmental Assessment (EA) to address various potential environmental issues associated with the proposed drilling activities. Approval of the new APO is expected in 2012.
 
There are no known environmental or threaten and endangered species issues at the Robertson Property that would provide grounds for denial of approval of an Amended Plan of Operation.
 
 
 
Coral Gold Resources Ltd. 4-4 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
 
Figure 4-1: Robertson Property location map.
 
 
 
Coral Gold Resources Ltd. 4-5 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
Figure 4-2: Claim Map

 
 
Coral Gold Resources Ltd. 4-6 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
4.6 LIST OF CLAIMS
 
The following lists the claims owned or leased by Coral. This list was provided by Coral and the authors of this report have not confirmed the veracity of the claim list but have not reason to believe that the list represent those claims owned or leased by Coral.
 
There are two claim areas that are not held by Coral and are shown in dark blue on Figure 4-2 Claim Map. One of these claims “Bronko” is held by Newmont while the other “Lucky Boy” by the Filipini family. Coral are in ongoing negotiations to option both these group of claims.
 
 Claim Name BLM Serial No.
County
Type Section Township
Range
Meridian
Ajax Mine
NMC 108376
Lander
LODE 8
SW SE
28N
47E
MDB&M
Andy 10A Amd
NMC 185342
Lander
LODE 8
NW SW
28N
47E
MDB&M
Andy 11 Amd
NMC 194632
Lander
LODE 8
SE
28N
47E
MDB&M
Andy 12 Amd
NMC 280683
Lander
LODE 9
NW
28N
47E
MDB&M
Andy 13 Amd
NMC 304726
Lander
LODE 9
SW
28N
47E
MDB&M
Andy 14 Amd
NMC 345415
Lander
LODE 16
NW
28N
47E
MDB&M
Andy 1A Amd
NMC 185339
Lander
LODE 8
SW
28N
47E
MDB&M
Andy 2 Amd
NMC 185343
Lander
LODE 8
SW SE
28N
47E
MDB&M
Andy 3 Amd
NMC 185344
Lander
LODE 8
SE
28N
47E
MDB&M
Andy 4 Amd
NMC 185345
Lander
LODE 8
SE
28N
47E
MDB&M
Andy 5 Amd
NMC 185346
Lander
LODE 16
NW
28N
47E
MDB&M
Andy 6A Amd
NMC 185340
Lander
LODE 9
SW
28N
47E
MDB&M
Andy 7A Amd
NMC 185341
Lander
LODE 9
SW SE
28N
47E
MDB&M
Andy 8 Amd
NMC 185347
Lander
LODE 9
NW SW
28N
47E
MDB&M
Andy 9 Amd
NMC 185348
Lander
LODE 9
NW SW
28N
47E
MDB&M
April Fool
NMC 121043
Lander
LODE 7
NE
28N
47E
MDB&M
Blue Nugget
NMC 92283
Lander
LODE 33
NW SW
29N
47E
MDB&M
Blue Nugget 1
NMC 92282
Lander
LODE 33
NW
29N
47E
MDB&M
Blue Nugget 2
NMC 289435
Lander
LODE 33
NE
29N
47E
MDB&M
Blue Nugget 3
NMC 289436
Lander
LODE 32
NE
29N
47E
MDB&M
Blue Nugget 4
NMC 289437
Lander
LODE 32
NE
29N
47E
MDB&M
Blue Nugget 5
NMC 289438
Lander
LODE 32
NW
29N
47E
MDB&M
Blue Nugget 6
NMC 289439
Lander
LODE 32
NW
29N
47E
MDB&M
Blue Nugget 7
NMC 289440
Lander
LODE 32
NW
29N
47E
MDB&M
Blue Nugget 8
NMC 289441
Lander
LODE 31
NE
29N
47E
MDB&M
BLUE RIDGE
NMC 69209
Lander
LODE 20
SW
28N
47E
MDB&M
BLUE RIDGE 1
NMC 69210
Lander
LODE 20
SW
28N
47E
MDB&M
BLUE RIDGE 2
NMC 69211
Lander
LODE 29
NW
28N
47E
MDB&M
BLUE RIDGE 3
NMC 69212
Lander
LODE 30
NE
28N
47E
MDB&M
BLUE RIDGE 4
NMC 69213
Lander
LODE 30
NE
28N
47E
MDB&M
BLUE RIDGE 5
NMC 69214
Lander
LODE 19
SE
28N
47E
MDB&M
BLUE RIDGE 6
NMC 69215
Lander
LODE 30
NE
28N
47E
MDB&M
BLUE RIDGE 7
NMC 69216
Lander
LODE 30
NE
28N
47E
MDB&M
BLUE RIDGE 8
NMC 69217
Lander
LODE 19
SE
28N
47E
MDB&M
Blue Rock
NMC 121033
Lander
LODE 8
SW
28N
47E
MDB&M
Blue Rock 2
NMC 121034
Lander
LODE 8
SW
28N
47E
MDB&M
Bluebird 1
NMC 298637
Lander
LODE 7
NE
28N
47E
MDB&M
Bluebird 2
NMC 298638
Lander
LODE 6
SE
28N
47E
MDB&M
BO 1
NMC 618727
Lander
LODE 16
SW SE
28N
47E
MDB&M
BO 10
NMC 618736
Lander
LODE 15
NW SW
28N
47E
MDB&M
BO 11
NMC 618737
Lander
LODE 15
SW
28N
47E
MDB&M
BO 12
NMC 618738
Lander
LODE 15
NW SW
28N
47E
MDB&M
BO 13
NMC 618739
Lander
LODE 15
SW
28N
47E
MDB&M
BO 14
NMC 618740
Lander
LODE 15
NW SW
28N
47E
MDB&M
BO 15
NMC 618741
Lander
LODE 15
SW
28N
47E
MDB&M
BO 16
NMC 618742
Lander
LODE 15
NW SW
28N
47E
MDB&M
BO 17
NMC 618743
Lander
LODE 15
SW
28N
47E
MDB&M
BO 18
NMC 618744
Lander
LODE 15
E NW SW
28N
47E
MDB&M
BO 19
NMC 618745
Lander
LODE 16
NE
28N
47E
MDB&M
BO 2
NMC 618728
Lander
LODE 16
E NW SW
28N
47E
MDB&M
BO 20
NMC 618746
Lander
LODE 9
SE
28N
47E
MDB&M

 
 
Coral Gold Resources Ltd. 4-7 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Claim Name BLM Serial No. County Type Section Township Range Meridian
BO 21
NMC 618747
Lander
LODE 16
NE
28N
47E
MDB&M
BO 22
NMC 618748
Lander
LODE 9
SE
28N
47E
MDB&M
BO 23
NMC 618749
Lander
LODE 16
NE
28N
47E
MDB&M
BO 24
NMC 618750
Lander
LODE 9
SE
28N
47E
MDB&M
BO 25
NMC 618751
Lander
LODE 15
NW
28N
47E
MDB&M
BO 26
NMC 618752
Lander
LODE 9
SE
28N
47E
MDB&M
BO 27
NMC 618753
Lander
LODE 15
NW
28N
47E
MDB&M
BO 28
NMC 618754
Lander
LODE 10
SW
28N
47E
MDB&M
BO 29
NMC 618755
Lander
LODE 15
NW
28N
47E
MDB&M
BO 3
NMC 618729
Lander
LODE 16
SE
28N
47E
MDB&M
BO 30
NMC 618756
Lander
LODE 10
SW
28N
47E
MDB&M
BO 31
NMC 618757
Lander
LODE 10
SW
28N
47E
MDB&M
BO 32
NMC 618758
Lander
LODE 10
SW
28N
47E
MDB&M
BO 33
NMC 618759
Lander
LODE 9
SE
28N
47E
MDB&M
BO 34
NMC 618760
Lander
LODE 10
SW
28N
47E
MDB&M
BO 35
NMC 618761
Lander
LODE 10
SW
28N
47E
MDB&M
BO 36
NMC 618762
Lander
LODE 10
SW SE
28N
47E
MDB&M
BO 37
NMC 618763
Lander
LODE 10
SW SE
28N
47E
MDB&M
BO 38
NMC 618764
Lander
LODE 10
SW SE
28N
47E
MDB&M
BO 39
NMC 618765
Lander
LODE 10
E NW SW
28N
47E
MDB&M
BO 4
NMC 618730
Lander
LODE 16
NE SE
28N
47E
MDB&M
BO 5
NMC 618731
Lander
LODE 16
SE
28N
47E
MDB&M
BO 6
NMC 618732
Lander
LODE 16
NE SE
28N
47E
MDB&M
BO 7
NMC 618733
Lander
LODE 16
SE
28N
47E
MDB&M
BO 8
NMC 618734
Lander
LODE 16
NE SE
28N
47E
MDB&M
BO 9
NMC 618735
Lander
LODE 15
SW
28N
47E
MDB&M
Bolder Mine
NMC 108373
Lander
LODE 7
SE
28N
47E
MDB&M
BRIDGET 1
NMC 57891
Lander
LODE 9
SE
28N
47E
MDB&M
BRIDGET 2
NMC 57892
Lander
LODE 9
SW
28N
47E
MDB&M
BRIDGET 3
NMC 57893
Lander
LODE 9
SW SE
28N
47E
MDB&M
BRIDGET 4
NMC 57894
Lander
LODE 9
SE
28N
47E
MDB&M
BRIDGET 5
NMC 319536
Lander
LODE 9
SW SE
28N
47E
MDB&M
CGR 1
NMC 1041042
Lander
LODE 16
SWSE
28N
47E
MDB&M
CGR 2
NMC 1041043
Lander
LODE 16
NWSW
28N
47E
MDB&M
CGR 3
NMC 1041044
Lander
LODE 7
SE
28N
47E
MDB&M
CGR 4
NMC 1041045
Lander
LODE 8
SW
28N
47E
MDB&M
CGR 5
NMC 1041046
Lander
LODE 8
SW
28N
47E
MDB&M
CGR 6
NMC 1041047
Lander
LODE  8
SW
28N
47E
MDB&M
CGR 7
NMC 1041048
Lander
LODE 8
SWSE
28N
47E
MDB&M
CGR 8
NMC 1041049
Lander
LODE 8
NNWSE
28N
47E
MDB&M
CGR 9
NMC 1041050
Lander
LODE 8
NE
28N
47E
MDB&M
CGR 10
NMC 1041051
Lander
LODE 7
NE
28N
47E
MDB&M
CGR 11
NMC 1041052
Lander
LODE 8
NW
28N
47E
MDB&M
CGR 12
NMC 1041053
Lander
LODE 7
NE
28N
47E
MDB&M
CGR 13
NMC 1041054
Lander
LODE 7
NE
28N
47E
MDB&M
CGR 14
NMC 1041055
Lander
LODE 7
NE
28N
47E
MDB&M
CGR 15
NMC 1041056
Lander
LODE 7
NESE
28N
47E
MDB&M
CGR 16
NMC 1041057
Lander
LODE 6
NW
28N
47E
MDB&M
CGR 17
NMC 1047714
Lander
LODE 9
SE
28N
47E
MDB&M
Char
NMC 108452
Lander
LODE 16
NE
28N
47E
MDB&M
CORAL 111
NMC 388655
Lander
LODE 7
NW
28N
47E
MDB&M

 
 
Coral Gold Resources Ltd. 4-8 January, 2012
 
Preliminary Economic Assessment   Robertson Property

Claim Name BLM Serial No. County Type Section Township Range Meridian
CORAL 112
NMC 388656
Lander
LODE 7
NW
28N
47E
MDB&M
CORAL 113
NMC 388657
Lander
LODE 7
NW
28N
47E
MDB&M
CORAL 114
NMC 388658
Lander
LODE 7
NW SW
28N
47E
MDB&M
CORAL 115
NMC 388659
Lander
LODE 7
SW
28N
47E
MDB&M
CORAL 116
NMC 388660
Lander
LODE 7
SW
28N
47E
MDB&M
CORAL 117
NMC 388661
Lander
LODE 7
SW
28N
47E
MDB&M
CORAL 118
NMC 388662
Lander
LODE 7
SW
28N
47E
MDB&M
CORAL 119
NMC 388663
Lander
LODE 7
NW
28N
47E
MDB&M
CORAL 120
NMC 388664
Lander
LODE 18
NE NW
28N
47E
MDB&M
CORAL 121
NMC 388665
Lander
LODE 18
SW SE
28N
47E
MDB&M
CORAL 122
NMC 388666
Lander
LODE 7
SW SE
28N
47E
MDB&M
CORAL 123
NMC 388667
Lander
LODE 7
SW SE
28N
47E
MDB&M
CORAL 124
NMC 388668
Lander
LODE 7
SW SE
28N
47E
MDB&M
CORAL 125
NMC 388669
Lander
LODE 7
E NW SW
28N
47E
MDB&M
CORAL 126
NMC 388670
Lander
LODE 7
NE NW
28N
47E
MDB&M
CORAL 127
NMC 388671
Lander
LODE 7
NE NW
28N
47E
MDB&M
CORAL 133
NMC 399063
Lander
LODE 9
NW
28N
47E
MDB&M
CORAL 134
NMC 399064
Lander
LODE 9
NE NW
28N
47E
MDB&M
CORAL 135
NMC 399065
Lander
LODE 4
SW
28N
47E
MDB&M
CORAL 136
NMC 538705
Lander
LODE 16
NE
28N
47E
MDB&M
CORAL 137
NMC 538706
Lander
LODE 16
NE
28N
47E
MDB&M
CORAL 138
NMC 538707
Lander
LODE 16
NE
28N
47E
MDB&M
CORAL 71
NMC 388615
Lander
LODE 18
NW
28N
47E
MDB&M
CORAL 72
NMC 388616
Lander
LODE 18
NW
28N
47E
MDB&M
CORAL 75
NMC 388619
Lander
LODE 18
NW SW
28N
47E
MDB&M
CORAL 76
NMC 388620
Lander
LODE 18
NW
28N
47E
MDB&M
CORAL 77
NMC 388621
Lander
LODE 18
E NW SW
28N
47E
MDB&M
CORAL 78
NMC 388622
Lander
LODE 18
NE NW
28N
47E
MDB&M
CORAL 79
NMC 388623
Lander
LODE 18
NE NW
28N
47E
MDB&M
CORAL 80
NMC 388624
Lander
LODE 18
NE NW
28N
47E
MDB&M
CP 1
NMC 622393
Lander
PLACER 16
SE
28N
47E
MDB&M
CP 10
NMC 622402
Lander
PLACER 15
NW SW
28N
47E
MDB&M
CP 11
NMC 622403
Lander
PLACER 15
SW
28N
47E
MDB&M
CP 13
NMC 622405
Lander
PLACER 15
SW
28N
47E
MDB&M
CP 15
NMC 622407
Lander
PLACER 15
SW SE
28N
47E
MDB&M
CP 17
NMC 622409
Lander
PLACER 16
NE
28N
47E
MDB&M
CP 18
NMC 622410
Lander
PLACER 16
NE
28N
47E
MDB&M
CP 19
NMC 622411
Lander
PLACER 16
NE
28N
47E
MDB&M
CP 2
NMC 622394
Lander
PLACER 16
NE SE
28N
47E
MDB&M
CP 20
NMC 622412
Lander
PLACER 16
NE
28N
47E
MDB&M
CP 21
NMC 622413
Lander
PLACER 15
NW
28N
47E
MDB&M
CP 22
NMC 622414
Lander
PLACER 15
NW
28N
47E
MDB&M
CP 23
NMC 622415
Lander
PLACER 15
NW
28N
47E
MDB&M
CP 24
NMC 622416
Lander
PLACER 15
NW
28N
47E
MDB&M
CP 3
NMC 622395
Lander
PLACER 16
SE
28N
47E
MDB&M
CP 35
NMC 622427
Lander
PLACER 9
SW SE
28N
47E
MDB&M
CP 36
NMC 622428
Lander
PLACER 9
SE
28N
47E
MDB&M
CP 37
NMC 622429
Lander
PLACER 9
SE
28N
47E
MDB&M
CP 4
NMC 622396
Lander
PLACER 16
NE SE
28N
47E
MDB&M
CP 40
NMC 622432
Lander
PLACER 10
SW
28N
47E
MDB&M
CP 42
NMC 622434
Lander
PLACER 10
SW
28N
47E
MDB&M

 
 
Coral Gold Resources Ltd. 4-9 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Claim Name BLM Serial No. County Type Section Township Range Meridian
CP 5
NMC 622397
Lander
PLACER 16
SE
28N
47E
MDB&M
CP 6
NMC 622398
Lander
PLACER 16
NE SE
28N
47E
MDB&M
CP 7
NMC 622399
Lander
PLACER 15
SW
28N
47E
MDB&M
CP 8
NMC 622400
Lander
PLACER 15
NW SW
28N
47E
MDB&M
CP 9
NMC 622401
Lander
PLACER 15
SW
28N
47E
MDB&M
Cracker Jack 1
NMC 121028
Lander
LODE 8
NW SW
28N
47E
MDB&M
Cracker Jack 2
NMC 121029
Lander
LODE 8
NW
28N
47E
MDB&M
Cracker Jack 3
NMC 298639
Lander
LODE 7
NE
28N
47E
MDB&M
Cracker Jack 4
NMC 298640
Lander
LODE 7
NE
28N
47E
MDB&M
Cracker Jack 5
NMC 121030
Lander
LODE 7
NE SE
28N
47E
MDB&M
Cresent
NMC 108400
Lander
LODE 16
NE NW
28N
47E
MDB&M
Crown
NMC 108398
Lander
LODE 16
NE NW
28N
47E
MDB&M
Crown 1
NMC 108399
Lander
LODE 16
NE NW
28N
47E
MDB&M
Crown 2
NMC 108396
Lander
LODE 16
NE
28N
47E
MDB&M
Crown 3
NMC 108397
Lander
LODE 16
NE NW
28N
47E
MDB&M
DR 1
NMC 108392
Lander
LODE 9
SW
28N
47E
MDB&M
DR 2
NMC 108393
Lander
LODE 9
SW
28N
47E
MDB&M
DR 3
NMC 108394
Lander
LODE 9
SW SE
28N
47E
MDB&M
DR 4
NMC 108395
Lander
LODE 9
SE
28N
47E
MDB&M
DR 5A
NMC 251744
Lander
LODE 9
NW SW
28N
47E
MDB&M
DR 6
NMC 251745
Lander
LODE 9
NW SW
28N
47E
MDB&M
DR 7
NMC 251746
Lander
LODE 9
SW SE
28N
47E
MDB&M
Eakin Fr
NMC 121032
Lander
LODE 8
SW SE
28N
47E
MDB&M
ELNA
NMC 145519
Lander
PLACER 10
NW
28N
47E
MDB&M
ELNA 1
NMC 145520
Lander
PLACER 10
SW
28N
47E
MDB&M
ELNA 2
NMC 145521
Lander
PLACER 10
SW
28N
47E
MDB&M
ELNA MS
NMC 145522
Lander
MILLSITE 10
NW
28N
47E
MDB&M
FANNIE K
NMC 145523
Lander
LODE 9
NE SE
28N
47E
MDB&M
FANNIE K 1
NMC 145524
Lander
LODE 10
NW SW
28N
47E
MDB&M
FANNIE K 10
NMC 186564
Lander
LODE 3
SW
28N
47E
MDB&M
FANNIE K 11
NMC 186565
Lander
LODE 4
SE
28N
47E
MDB&M
FANNIE K 12
NMC 186566
Lander
LODE 4
SE
28N
47E
MDB&M
FANNIE K 13
NMC 186567
Lander
LODE 4
SE
28N
47E
MDB&M
FANNIE K 14
NMC 186568
Lander
LODE 3
NW SW
28N
47E
MDB&M
FANNIE K 15
NMC 186569
Lander
LODE 3
SW
28N
47E
MDB&M
FANNIE K 16
NMC 186570
Lander
LODE 3
SW
28N
47E
MDB&M
FANNIE K 17
NMC 186571
Lander
LODE 3
SW
28N
47E
MDB&M
FANNIE K 18
NMC 186572
Lander
LODE 3
SW
28N
47E
MDB&M
FANNIE K 19
NMC 186573
Lander
LODE 3
SW
28N
47E
MDB&M
FANNIE K 2
NMC 145525
Lander
LODE 9
SE
28N
47E
MDB&M
FANNIE K 20
NMC 186574
Lander
LODE 3
SW
28N
47E
MDB&M
FANNIE K 21
NMC 186575
Lander
LODE 10
NW
28N
47E
MDB&M
FANNIE K 22
NMC 186576
Lander
LODE 10
NE NW
28N
47E
MDB&M
FANNIE K 23
NMC 186577
Lander
LODE 10
NE NW SW
28N
47E
MDB&M
FANNIE K 24
NMC 186578
Lander
LODE 9
NE
28N
47E
MDB&M
FANNIE K 25
NMC 186579
Lander
LODE 9
NE
28N
47E
MDB&M
FANNIE K 26
NMC 186580
Lander
LODE 4
SE
28N
47E
MDB&M
FANNIE K 27
NMC 186581
Lander
LODE 4
SW SE
28N
47E
MDB&M
FANNIE K 28
NMC 186582
Lander
LODE 4
SW SE
28N
47E
MDB&M
FANNIE K 3
NMC 145526
Lander
LODE  9
SE
28N
47E
MDB&M
FANNIE K 4
NMC 186558
Lander
LODE 10
NW SW
28N
47E
MDB&M
 
 
 
Coral Gold Resources Ltd. 4-10 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Claim Name
BLM Serial No.
County
Type
Section
Township
Range
Meridian
FANNIE K 5
NMC 186559
Lander
LODE 10
NW SW
28N
47E
MDB&M
FANNIE K 6
NMC 186560
Lander
LODE 10
NW
28N
47E
MDB&M
FANNIE K 7
NMC 186561
Lander
LODE 10
NE
28N
47E
MDB&M
FANNIE K 8
NMC 186562
Lander
LODE 9
NE
28N
47E
MDB&M
FANNIE K 9
NMC 186563
Lander
LODE 3
SW
28N
47E
MDB&M
Fannie K Ext 1
NMC 314753
Lander
LODE 3
SW
28N
47E
MDB&M
Fannie K Ext 2
NMC 314754
Lander
LODE 4
SE
28N
47E
MDB&M
Fannie K Ext 3
NMC 314755
Lander
LODE 4
SE
28N
47E
MDB&M
Fannie K Ext 4
NMC 314756
Lander
LODE 9
NE NW
28N
47E
MDB&M
Fannie K Ext 5
NMC 314757
Lander
LODE 4
SW SE
28N
47E
MDB&M
Fannie K Ext 6
NMC 314758
Lander
LODE 4
SW SE
28N
47E
MDB&M
Fannie K P 1
NMC 240336
Lander
PLACER 10
SW
28N
47E
MDB&M
Fannie K P 10
NMC 240345
Lander
PLACER 3
SW
28N
47E
MDB&M
Fannie K P 13
NMC 240346
Lander
PLACER 3
SW
28N
47E
MDB&M
Fannie K P 14
NMC 240347
Lander
PLACER 3
SW
28N
47E
MDB&M
Fannie K P 15
NMC 240348
Lander
PLACER 10
NW
28N
47E
MDB&M
Fannie K P 16
NMC 240349
Lander
PLACER 10
NW
28N
47E
MDB&M
Fannie K P 17
NMC 240350
Lander
PLACER 10
SW
28N
47E
MDB&M
Fannie K P 18
NMC 240351
Lander
PLACER 10
SW
28N
47E
MDB&M
Fannie K P 19
NMC 240352
Lander
PLACER 9
SE
28N
47E
MDB&M
Fannie K P 2
NMC 240337
Lander
PLACER 10
NW
28N
47E
MDB&M
Fannie K P 20
NMC 240353
Lander
PLACER 9
SE
28N
47E
MDB&M
Fannie K P 21
NMC 240354
Lander
PLACER 9
SE
28N
47E
MDB&M
Fannie K P 22
NMC 240355
Lander
PLACER 9
NE
28N
47E
MDB&M
Fannie K P 23
NMC 240356
Lander
PLACER 9
NW
28N
47E
MDB&M
Fannie K P 24
NMC 240357
Lander
PLACER 4
SE
28N
47E
MDB&M
Fannie K P 25
NMC 240358
Lander
PLACER 4
SE
28N
47E
MDB&M
Fannie K P 29
NMC 240359
Lander
PLACER 4
SE
28N
47E
MDB&M
Fannie K P 3
NMC 240338
Lander
PLACER 10
NE
28N
47E
MDB&M
Fannie K P 30
NMC 240360
Lander
PLACER 4
SE
28N
47E
MDB&M
Fannie K P 32
NMC 240361
Lander
PLACER 9
NE
28N
47E
MDB&M
Fannie K P 33
NMC 240362
Lander
PLACER 9
NE
28N
47E
MDB&M
Fannie K P 34
NMC 240363
Lander
PLACER 9
SE
28N
47E
MDB&M
Fannie K P 35
NMC 240364
Lander
PLACER 9
SE
28N
47E
MDB&M
Fannie K P 4
NMC 240339
Lander
PLACER 10
NE
28N
47E
MDB&M
Fannie K P 5
NMC 240340
Lander
PLACER 10
NE NW
28N
47E
MDB&M
Fannie K P 6
NMC 240341
Lander
PLACER 10
NE
28N
47E
MDB&M
Fannie K P 7
NMC 240342
Lander
PLACER 10
NW
28N
47E
MDB&M
Fannie K P 8
NMC 240343
Lander
PLACER 10
NW
28N
47E
MDB&M
Fannie K P 9
NMC 240344
Lander
PLACER 0
SW
28N
47E
MDB&M
FBA 101
NMC 244321
Lander
PLACER 9
SE
28N
47E
MDB&M
FBA 102
NMC 244322
Lander
PLACER 9
SW
28N
47E
MDB&M
FBA 103
NMC 244323
Lander
PLACER 9
SE
28N
47E
MDB&M
FBA 104
NMC 244324
Lander
PLACER 9
SW
28N
47E
MDB&M
FBA 105
NMC 244325
Lander
PLACER 9
SE
28N
47E
MDB&M
FBA 106
NMC 244326
Lander
PLACER 9
SW
28N
47E
MDB&M
FBA 107
NMC 244327
Lander
PLACER 9
SE
28N
47E
MDB&M
FBA 108
NMC 244328
Lander
PLACER 9
SW
28N
47E
MDB&M
FBA 109
NMC 244329
Lander
PLACER 9
NW
28N
47E
MDB&M
FBA 110
NMC 244330
Lander
PLACER 9
SW
28N
47E
MDB&M
FBA 111
NMC 244331
Lander
PLACER 9
SW
28N
47E
MDB&M
 
 
Coral Gold Resources Ltd. 4-11 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Claim Name
BLM Serial No.
County
Type
Section
Township
Range
Meridian
FBA 112
NMC 244332
Lander
PLACER 8
SE
28N
47E
MDB&M
FBA 113
NMC 244333
Lander
PLACER 8
SE
28N
47E
MDB&M
FBA 114
NMC 244334
Lander
PLACER 8
SE
28N
47E
MDB&M
FBA 115
NMC 244335
Lander
PLACER 9
SE
28N
47E
MDB&M
FBA 116
NMC 244336
Lander
PLACER 9
SW
28N
47E
MDB&M
FBA 117
NMC 244337
Lander
PLACER 9
SW
28N
47E
MDB&M
FBA 118
NMC 304727
Lander
PLACER 16
NW
28N
47E
MDB&M
FBA 119
NMC 304728
Lander
PLACER 16
NW
28N
47E
MDB&M
FBA 120
NMC 304729
Lander
PLACER 16
NW
28N
47E
MDB&M
FBA 121
NMC 304730
Lander
PLACER 16
NW
28N
47E
MDB&M
FBA 122
NMC 304731
Lander
PLACER 16
NW
28N
47E
MDB&M
FBA 123
NMC 304732
Lander
PLACER 16
NW
28N
47E
MDB&M
FBA 124
NMC 304733
Lander
PLACER 16
NE NW
28N
47E
MDB&M
FBA 125
NMC 304734
Lander
PLACER 16
NE
28N
47E
MDB&M
Fossil 1
NMC 485485
Lander
PLACER 16
NE SE
28N
47E
MDB&M
Fossil 2
NMC 485486
Lander
PLACER 16
NE SE
28N
47E
MDB&M
Gary
NMC 121031
Lander
LODE 7
NE SE
28N
47E
MDB&M
GIV 1
NMC 108476
Lander
LODE 16
SW SE
28N
47E
MDB&M
GIV 2
NMC 108477
Lander
LODE 16
SW SE
28N
47E
MDB&M
GIV 3
NMC 108478
Lander
LODE 16
SW SE
28N
47E
MDB&M
GIV 4
NMC 108479
Lander
LODE 16
NW SW
28N
47E
MDB&M
GIV 5
NMC 108480
Lander
LODE 16
NW
28N
47E
MDB&M
GIV 6
NMC 120965
Lander
LODE 16
NW SW
28N
47E
MDB&M
Gold Leaf 1 Ext
NMC 191669
Lander
LODE 2
NW
28N
47E
MDB&M
Gold Leaf 10
NMC 381907
Lander
LODE 3
SW
28N
47E
MDB&M
Gold Leaf 11
NMC 316600
Lander
LODE 4
SW SE
28N
47E
MDB&M
Gold Leaf 12
NMC 316601
Lander
LODE 4
SE
28N
47E
MDB&M
Gold Leaf 13
NMC 316602
Lander
LODE 4
SE
28N
47E
MDB&M
Gold Leaf 14
NMC 316603
Lander
LODE 4
SE
28N
47E
MDB&M
Gold Leaf 15
NMC 316604
Lander
LODE 4
SE
28N
47E
MDB&M
Gold Leaf 16
NMC 316605
Lander
LODE 4
SW SE
28N
47E
MDB&M
Gold Leaf 2 Ext
NMC 191670
Lander
LODE 3
NE
28N
47E
MDB&M
Gold Leaf 3 Ext
NMC 191671
Lander
LODE 34
SW
29N
47E
MDB&M
Gold Leaf 4 Ext
NMC 221410
Lander
LODE 3
NW
28N
47E
MDB&M
Gold Leaf 5
NMC 381902
Lander
LODE 3
NW SW
28N
47E
MDB&M
Gold Leaf 6
NMC 381903
Lander
LODE 3
SW SE
28N
47E
MDB&M
Gold Leaf 7
NMC 381904
Lander
LODE 3
SW SE
28N
47E
MDB&M
Gold Leaf 8
NMC 381905
Lander
LODE 3
NW SW
28N
47E
MDB&M
Gold Leaf 9
NMC 381906
Lander
LODE 3
SW
28N
47E
MDB&M
Gold Link
NMC 121036
Lander
LODE 8
SW SE
28N
47E
MDB&M
Gold Note 1
NMC 121453
Lander
LODE 9
SE
28N
47E
MDB&M
Gold Note Mine
NMC 108382
Lander
LODE 9
SE
28N
47E
MDB&M
Gold Note 1
NMC 108383
Lander
LODE 16
NW
28N
47E
MDB&M
Gold Note 1A
NMC 245899
Lander
LODE 8
SE
28N
47E
MDB&M
Gold Note 2
NMC 121454
Lander
LODE 9
NE SE
28N
47E
MDB&M
Gold Note 2
NMC 108384
Lander
LODE 17
NE
28N
47E
MDB&M
Gold Note 2A
NMC 245900
Lander
LODE 8
SW SE
28N
47E
MDB&M
Gold Pan 1
NMC 121016
Lander
LODE 8
NE SE
28N
47E
MDB&M
Gold Pan 2
NMC 121017
Lander
LODE 8
NE SE
28N
47E
MDB&M
Gold Pan 3
NMC 121018
Lander
LODE 8
NE
28N
47E
MDB&M
Gold Pan 4
NMC 121019
Lander
LODE 8
NE
28N
47E
MDB&M

 
 
Coral Gold Resources Ltd. 4-12 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Claim Name BLM Serial No. County Type Section
Township 
Range Meridian
Gold Pan 5
NMC 121020
Lander
LODE 8
NE
28N
47E
MDB&M
Gold Rock 1
NMC 121014
Lander
LODE 8
NE
28N
47E
MDB&M
Gold Rock 2
NMC 121015
Lander
LODE 8
NE
28N
47E
MDB&M
Gold Zone
NMC 121027
Lander
LODE 8
NW SW
28N
47E
MDB&M
Gray Rock
NMC 121037
Lander
LODE 8
SW
28N
47E
MDB&M
Gylding 1
NMC 121021
Lander
LODE 8
NE NW SW
28N
47E
MDB&M
Gylding 2
NMC 121022
Lander
LODE 8
NW SW
28N
47E
MDB&M
Gylding 3
NMC 121023
Lander
LODE 8
NE NW
28N
47E
MDB&M
Gylding 4
NMC 121024
Lander
LODE 8
NE NW
28N
47E
MDB&M
Gylding 5
NMC 121025
Lander
LODE 5
SW SE
28N
47E
MDB&M
Hard Climb
NMC 121042
Lander
LODE 7
NE NW
28N
47E
MDB&M
HATTISBURG
NMC 121472
Lander
PLACER 9
NE
28N
47E
MDB&M
Hercules Amd
NMC 108375
Lander
LODE 8
SE
28N
47E
MDB&M
Jake 1
NMC 832390
Lander
LODE 9
SE
28N
47E
MDB&M
Jake 10
NMC 832399
Lander
LODE 15
NW
28N
47E
MDB&M
Jake 11
NMC 832400
Lander
LODE 15
NW SW
28N
47E
MDB&M
Jake 12
NMC 832401
Lander
LODE 15
NW SW
28N
47E
MDB&M
Jake 13
NMC 832402
Lander
LODE 15
NW SW
28N
47E
MDB&M
Jake 14
NMC 832403
Lander
LODE 15
SW
28N
47E
MDB&M
Jake 15
NMC 832404
Lander
LODE 15
SW
28N
47E
MDB&M
Jake 16
NMC 832405
Lander
LODE 15
SW
28N
47E
MDB&M
Jake 2
NMC 832391
Lander
LODE 10
SW
28N
47E
MDB&M
Jake 3
NMC 832392
Lander
LODE 10
SW
28N
47E
MDB&M
Jake 4
NMC 832393
Lander
LODE 10
SW
28N
47E
MDB&M
Jake 5
NMC 832394
Lander
LODE 10
SW
28N
47E
MDB&M
Jake 6
NMC 832395
Lander
LODE 10
SW
28N
47E
MDB&M
Jake 7
NMC 832396
Lander
LODE 15
NW
28N
47E
MDB&M
Jake 8
NMC 832397
Lander
LODE 15
NW
28N
47E
MDB&M
Jake 9
NMC 832398
Lander
LODE 15
NW
28N
47E
MDB&M
Jiant Lode Mine
NMC 108372
Lander
LODE 8
SW
28N
47E
MDB&M
JRT 1
NMC 584820
Lander
LODE 34
SE
29N
47E
MDB&M
JRT 10
NMC 584829
Lander
LODE 34
NE SE
29N
47E
MDB&M
JRT 11
NMC 584830
Lander
LODE 34
NE
29N
47E
MDB&M
JRT 12
NMC 584831
Lander
LODE 34
NE
29N
47E
MDB&M
JRT 13
NMC 584832
Lander
LODE 34
NE
29N
47E
MDB&M
JRT 14
NMC 584833
Lander
LODE 34
NE
29N
47E
MDB&M
JRT 15
NMC 584834
Lander
LODE 34
NE
29N
47E
MDB&M
JRT 16
NMC 584835
Lander
LODE 34
NE
29N
47E
MDB&M
JRT 17
NMC 584836
Lander
LODE 34
NE
29N
47E
MDB&M
JRT 18
NMC 584837
Lander
LODE 34
NE
29N
47E
MDB&M
JRT 19
NMC 584838
Lander
LODE 34
SW
29N
47E
MDB&M
JRT 2
NMC 584821
Lander
LODE 34
SE
29N
47E
MDB&M
JRT 20
NMC 584839
Lander
LODE 34
SW
29N
47E
MDB&M
JRT 21
NMC 584840
Lander
LODE 34
SW
29N
47E
MDB&M
JRT 22
NMC 584841
Lander
LODE 34
SW
29N
47E
MDB&M
JRT 23
NMC 584842
Lander
LODE 34
SW
29N
47E
MDB&M
JRT 24
NMC 584843
Lander
LODE 34
SW
29N
47E
MDB&M
JRT 25
NMC 584844
Lander
LODE 34
SW
29N
47E
MDB&M
JRT 26
NMC 584845
Lander
LODE 34
SW
29N
47E
MDB&M
JRT 27
NMC 584846
Lander
LODE 34
NW SW
29N
47E
MDB&M
JRT 28
NMC 584847
Lander
LODE 34
NW SW
29N
47E
MDB&M

 
 
Coral Gold Resources Ltd. 4-13 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Claim Name
BLM Serial No.
County
Type
Section
Township
Range
Meridian
JRT 29
NMC 584848
Lander
LODE 34
NW
29N
47E
MDB&M
JRT 3
NMC 584822
Lander
LODE 34
SE
29N
47E
MDB&M
JRT 30
NMC 584849
Lander
LODE 34
NW
29N
47E
MDB&M
JRT 31
NMC 584850
Lander
LODE 34
NW
29N
47E
MDB&M
JRT 32
NMC 584851
Lander
LODE 34
NW
29N
47E
MDB&M
JRT 33
NMC 584852
Lander
LODE 34
NW
29N
47E
MDB&M
JRT 34
NMC 584853
Lander
LODE 34
NW
29N
47E
MDB&M
JRT 35
NMC 584854
Lander
LODE 34
NW
29N
47E
MDB&M
JRT 36
NMC 584855
Lander
LODE 34
NW
29N
47E
MDB&M
JRT 37
NMC 584856
Lander
LODE 33
SE
29N
47E
MDB&M
JRT 38
NMC 584857
Lander
LODE 33
SE
29N
47E
MDB&M
JRT 39
NMC 584858
Lander
LODE 33
SE
29N
47E
MDB&M
JRT 4
NMC 584823
Lander
LODE 34
SE
29N
47E
MDB&M
JRT 40
NMC 584859
Lander
LODE 33
SE
29N
47E
MDB&M
JRT 41
NMC 584860
Lander
LODE 33
SW
29N
47E
MDB&M
JRT 42
NMC 584861
Lander
LODE 33
SW
29N
47E
MDB&M
JRT 43
NMC 584862
Lander
LODE 33
SW
29N
47E
MDB&M
JRT 44
NMC 584863
Lander
LODE 33
SW
29N
47E
MDB&M
JRT 45
NMC 584864
Lander
LODE 33
SW
29N
47E
MDB&M
JRT 46
NMC 584865
Lander
LODE 26
SW
29N
47E
MDB&M
JRT 47
NMC 584866
Lander
LODE 26
SW
29N
47E
MDB&M
JRT 48
NMC 584867
Lander
LODE 26
SW
29N
47E
MDB&M
JRT 49
NMC 584868
Lander
LODE 26
SW
29N
47E
MDB&M
JRT 5
NMC 584824
Lander
LODE 34
SE
29N
47E
MDB&M
JRT 50
NMC 584869
Lander
LODE 26
SW
29N
47E
MDB&M
JRT 51
NMC 584870
Lander
LODE 26
SW
29N
47E
MDB&M
JRT 52
NMC 584871
Lander
LODE 26
SW
29N
47E
MDB&M
JRT 53
NMC 584872
Lander
LODE 26
SW
29N
47E
MDB&M
JRT 54
NMC 584873
Lander
LODE 26
NW SW
29N
47E
MDB&M
JRT 55
NMC 584874
Lander
LODE 26
NW SW
29N
47E
MDB&M
JRT 56
NMC 584875
Lander
LODE 26
NW
29N
47E
MDB&M
JRT 57
NMC 584876
Lander
LODE 26
NW
29N
47E
MDB&M
JRT 58
NMC 584877
Lander
LODE 26
SE
29N
47E
MDB&M
JRT 59
NMC 584878
Lander
LODE 26
SE
29N
47E
MDB&M
JRT 6
NMC 584825
Lander
LODE 34
SE
29N
47E
MDB&M
JRT 60
NMC 584879
Lander
LODE 26
SE
29N
47E
MDB&M
JRT 61
NMC 584880
Lander
LODE 26
SE
29N
47E
MDB&M
JRT 62
NMC 584881
Lander
LODE 26
SE
29N
47E
MDB&M
JRT 63
NMC 584882
Lander
LODE 26
SE
29N
47E
MDB&M
JRT 64
NMC 584883
Lander
LODE 26
SE
29N
47E
MDB&M
JRT 65
NMC 584884
Lander
LODE 26
SE
29N
47E
MDB&M
JRT 66
NMC 584885
Lander
LODE 26
 
29N
47E
MDB&M
JRT 67
NMC 584886
Lander
LODE 26
 
29N
47E
MDB&M
JRT 68
NMC 584887
Lander
LODE 26
NE
29N
47E
MDB&M
JRT 69
NMC 584888
Lander
LODE 26
NE
29N
47E
MDB&M
JRT 7
NMC 584826
Lander
LODE 34
SE
29N
47E
MDB&M
JRT 70
NMC 584889
Lander
LODE 4
NE
28N
47E
MDB&M
JRT 71
NMC 584890
Lander
LODE 4
NE
28N
47E
MDB&M
JRT 72
NMC 584891
Lander
LODE 4
NE
28N
47E
MDB&M
JRT 73
NMC 584892
Lander
LODE 4
NE NW
28N
47E
MDB&M
JRT 74
NMC 584893
Lander
LODE 4
NW
28N
47E
MDB&M

 
 
Coral Gold Resources Ltd. 4-14 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Claim Name
BLM Serial No.
County
Type
Section
Township
Range
Meridian
JRT 75
NMC 584894
Lander
LODE 4
NW
28N
47E
MDB&M
JRT 76
NMC 584895
Lander
LODE 4
NW
28N
47E
MDB&M
JRT 77
NMC 584896
Lander
LODE 4
NW
28N
47E
MDB&M
JRT 78
NMC 584897
Lander
LODE 4
NW
28N
47E
MDB&M
JRT 8
NMC 584827
Lander
LODE 34
SE
29N
47E
MDB&M
JRT 9
NMC 584828
Lander
LODE 34
NE SE
29N
47E
MDB&M
Jumbo Mine
NMC 108374
Lander
LODE 8
SW
28N
47E
MDB&M
June #1
NMC 123439
Lander
LODE 6
NE
28N
47E
MDB&M
June #2
NMC 123440
Lander
LODE 6
SE
28N
47E
MDB&M
June #3
NMC 123441
Lander
LODE 6
NW
28N
47E
MDB&M
June #4
NMC 123442
Lander
LODE 31
SW
29N
47E
MDB&M
June #5
NMC 123443
Lander
LODE 31
SW
29N
47E
MDB&M
June #6
NMC 123444
Lander
LODE 6
NE
28N
47E
MDB&M
Lander Ranch
NMC 299862
Lander
LODE 5
NE
28N
47E
MDB&M
Lander Ranch 1
NMC 291643
Lander
LODE 5
NW
28N
47E
MDB&M
Lander Ranch 10
NMC 304592
Lander
LODE 5
NW SW
28N
47E
MDB&M
Lander Ranch 11
NMC 299867
Lander
LODE 5
NE
28N
47E
MDB&M
Lander Ranch 12
NMC 304593
Lander
LODE 5
NE SE
28N
47E
MDB&M
Lander Ranch 13
NMC 299868
Lander
LODE 5
NE
28N
47E
MDB&M
Lander Ranch 14
NMC 304594
Lander
LODE 5
NE SE
28N
47E
MDB&M
Lander Ranch 15
NMC 299869
Lander
LODE 5
NE
28N
47E
MDB&M
Lander Ranch 16
NMC 304595
Lander
LODE 5
NE SE
28N
47E
MDB&M
Lander Ranch 17
NMC 299870
Lander
LODE 5
NE
28N
47E
MDB&M
Lander Ranch 18
NMC 304596
Lander
LODE 5
NE SE
28N
47E
MDB&M
Lander Ranch 19
NMC 304597
Lander
LODE 5
SE
28N
47E
MDB&M
Lander Ranch 2
NMC 291644
Lander
LODE 5
NW SW
28N
47E
MDB&M
Lander Ranch 20
NMC 304598
Lander
LODE 5
SE
28N
47E
MDB&M
Lander Ranch 21
NMC 304599
Lander
LODE 5
SE
28N
47E
MDB&M
Lander Ranch 22
NMC 304600
Lander
LODE 5
SE
28N
47E
MDB&M
Lander Ranch 23
NMC 304601
Lander
LODE 5
SW SE
28N
47E
MDB&M
Lander Ranch 24
NMC 304602
Lander
LODE 5
SW
28N
47E
MDB&M
Lander Ranch 25
NMC 304603
Lander
LODE 5
SW
28N
47E
MDB&M
Lander Ranch 3
NMC 291645
Lander
LODE 5
NW
28N
47E
MDB&M
Lander Ranch 4
NMC 291646
Lander
LODE 5
NW SW
28N
47E
MDB&M
Lander Ranch 5
NMC 299864
Lander
LODE 5
NW
28N
47E
MDB&M
Lander Ranch 6
NMC 304590
Lander
LODE 5
NW SW
28N
47E
MDB&M
Lander Ranch 7
NMC 299865
Lander
LODE 5
NW
28N
47E
MDB&M
Lander Ranch 8
NMC 304591
Lander
LODE 5
NW SW
28N
47E
MDB&M
Lander Ranch 9
NMC 299866
Lander
LODE 5
NE NW
28N
47E
MDB&M
Lander Ranch ext
NMC 299863
Lander
LODE 5
NE
28N
47E
MDB&M
Little Gem Ext
NMC 121026
Lander
LODE 5
SW
28N
47E
MDB&M
Molly 1
NMC 121038
Lander
LODE 7
SE
28N
47E
MDB&M
Molly 2
NMC 121039
Lander
LODE 7
SW SE
28N
47E
MDB&M
Molly 3
NMC 121040
Lander
LODE 7
SE
28N
47E
MDB&M
Molly 4
NMC 121041
Lander
LODE 7
SE
28N
47E
MDB&M
New Ray
NMC 108377
Lander
LODE 8
SE
28N
47E
MDB&M
New Ray Fr
NMC 108378
Lander
LODE 9
NW SW
28N
47E
MDB&M
Our Faith
NMC 298636
Lander
LODE 5
SW
28N
47E
MDB&M
Phoenix Mine
NMC 108381
Lander
LODE 8
SE
28N
47E
MDB&M
Phoenix
NMC 121452
Lander
LODE 9
NE SE
28N
47E
MDB&M
Phoenix 1
NMC 108385
Lander
LODE 16
NW
28N
47E
MDB&M

 
 
Coral Gold Resources Ltd. 4-15 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Claim Name
BLM Serial No.
County
Type
Section
Township
Range
Meridian
Phoenix 2
NMC 108386
Lander
LODE 8
SE
28N
47E
MDB&M
Phoenix 3
NMC 108387
Lander
LODE 8
SE
28N
47E
MDB&M
Phoenix 4
NMC 108388
Lander
LODE 8
SE
28N
47E
MDB&M
Phoenix 5
NMC 108389
Lander
LODE 9
SW
28N
47E
MDB&M
Phoenix 6
NMC 108390
Lander
LODE 9
SW
28N
47E
MDB&M
Phoenix B
NMC 245898
Lander
LODE 8
SE
28N
47E
MDB&M
Rob 10A
NMC 943457
Lander
LODE 7
SW
28N
47E
MDB&M
Rob 1A
NMC 943456
Lander
LODE 8
NE
28N
47E
MDB&M
Rob 2A
NMC 943455
Lander
LODE 8
NE
28N
47E
MDB&M
Rob 5
NMC 936375
Lander
LODE 8
SW SE
28N
47E
MDB&M
Rob 6
NMC 936376
Lander
LODE 8
SW SE
28N
47E
MDB&M
Rob 7
NMC 936377
Lander
LODE 8
E NW SW
28N
47E
MDB&M
Rob 8
NMC 936378
Lander
LODE 17
NW
28N
47E
MDB&M
Rob 9
NMC 936379
Lander
LODE 7
SE
28N
47E
MDB&M
Rod B 1
NMC 268011
Lander
LODE 7
SW SE
28N
47E
MDB&M
Rod B 2
NMC 268012
Lander
LODE 7
E NW SW
28N
47E
MDB&M
Rod B 3
NMC 60952
Lander
LODE 7
SW SE
28N
47E
MDB&M
Rod B 4
NMC 60953
Lander
LODE 7
SW SE
28N
47E
MDB&M
Rod B 5
NMC 268013
Lander
LODE 7
NW SW
28N
47E
MDB&M
Rod B 6
NMC 268014
Lander
LODE 7
NE NW
28N
47E
MDB&M
Rod B 7
NMC 60954
Lander
LODE 7
NE SE
28N
47E
MDB&M
RUF 1
NMC 108404
Lander
LODE 16
SW
28N
47E
MDB&M
RUF 10
NMC 108413
Lander
LODE 20
NE
28N
47E
MDB&M
RUF 11
NMC 108414
Lander
LODE 17
SW SE
28N
47E
MDB&M
RUF 12
NMC 108415
Lander
LODE 17
SW SE
28N
47E
MDB&M
RUF 13
NMC 108416
Lander
LODE 20
NE NW
28N
47E
MDB&M
RUF 14
NMC 108417
Lander
LODE 20
NE NW
28N
47E
MDB&M
RUF 15
NMC 108418
Lander
LODE 20
NE NW
28N
47E
MDB&M
RUF 16
NMC 108419
Lander
LODE 20
NE SE
28N
47E
MDB&M
RUF 17
NMC 108420
Lander
LODE 20
SE
28N
47E
MDB&M
RUF 18
NMC 108421
Lander
LODE 20
SE
28N
47E
MDB&M
RUF 19
NMC 108422
Lander
LODE 20
SE
28N
47E
MDB&M
RUF 2
NMC 108405
Lander
LODE 17
SE
28N
47E
MDB&M
RUF 20
NMC 108423
Lander
LODE 20
SE
28N
47E
MDB&M
RUF 21
NMC 735751
Lander
LODE 16
SW
28N
47E
MDB&M
RUF 22
NMC 735752
Lander
LODE 17
SE
28N
47E
MDB&M
RUF 23
NMC 735753
Lander
LODE 17
SW SE
28N
47E
MDB&M
RUF 3
NMC 108406
Lander
LODE 20
NE
28N
47E
MDB&M
RUF 4
NMC 108407
Lander
LODE 17
SE
28N
47E
MDB&M
RUF 5
NMC 108408
Lander
LODE 20
NE
28N
47E
MDB&M
RUF 6
NMC 108409
Lander
LODE 20
NE
28N
47E
MDB&M
RUF 7
NMC 108410
Lander
LODE 20
NE
28N
47E
MDB&M
RUF 8
NMC 108411
Lander
LODE 20
NE
28N
47E
MDB&M
RUF 9
NMC 108412
Lander
LODE 20
NE
28N
47E
MDB&M
Sage
NMC 108401
Lander
LODE 16
NW
28N
47E
MDB&M
Silver Safe
NMC 121035
Lander
LODE 8
SW SE
28N
47E
MDB&M
S&M 1
NMC 4636
Lander
PLACER 8
SE
28N
47E
MDB&M
S&M 2
NMC 4637
Lander
PLACER 8
SE
28N
47E
MDB&M
S&M 3
NMC 4638
Lander
PLACER 8
SE
28N
47E
MDB&M
S&M 4
NMC 4639
Lander
PLACER 9
SW
28N
47E
MDB&M
Small Wonder Fr
NMC 121045
Lander
LODE 6
SW SE
28N
47E
MDB&M
 
 
 
Coral Gold Resources Ltd. 4-16 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Claim Name
BLM Serial No. County
Type 
 Section
Township 
Range Meridian
Standard Mine
NMC 108380
Lander
LODE 8
SE
28N
47E
MDB&M
T&E 1
NMC 108481
Lander
LODE 8
SW SE
28N
47E
MDB&M
T&E 2
NMC 108482
Lander
LODE 9
SW
28N
47E
MDB&M
TENABO 1
NMC 87260
Lander
LODE 9
NE SW SE
28N
47E
MDB&M
TENABO 2
NMC 87261
Lander
LODE 9
SW SE
28N
47E
MDB&M
TENABO 3 Fr
NMC 57902
Lander
LODE 9
SE
28N
47E
MDB&M
TENABO 4
NMC 57903
Lander
LODE 9
NE SE
28N
47E
MDB&M
Tenabo Surprise Fr
NMC 57904
Lander
LODE 9
NW SW SE
28N
47E
MDB&M
TIGER 1
NMC 57889
Lander
LODE 9
NW SW
28N
47E
MDB&M
TIGER 2
NMC 57890
Lander
LODE 9
SW SE
28N
47E
MDB&M
Total Wreck
NMC 121044
Lander
LODE 6
SE
28N
47E
MDB&M
Try 100
NMC 330615
Lander
LODE 6
SE
28N
47E
MDB&M
TRY 37
NMC 2721
Lander
LODE 17
NE NW
28N
47E
MDB&M
TRY 38
NMC 2722
Lander
LODE 17
NE
28N
47E
MDB&M
TRY 39
NMC 2723
Lander
LODE 17
NE NW
28N
47E
MDB&M
TRY 40
NMC 2720
Lander
LODE 17
NE
28N
47E
MDB&M
TRY 41
NMC 2719
Lander
LODE 17
NE NW
28N
47E
MDB&M
TRY 42
NMC 2718
Lander
LODE 17
NE
28N
47E
MDB&M
TRY 43
NMC 2717
Lander
LODE 17
E NW SW
28N
47E
MDB&M
TRY 44
NMC 2716
Lander
LODE 17
NE SE
28N
47E
MDB&M
TRY 45
NMC 2715
Lander
LODE 17
SW SE
28N
47E
MDB&M
TRY 46
NMC 2714
Lander
LODE 17
SE
28N
47E
MDB&M
TRY 47
NMC 2713
Lander
LODE 17
SW SE
28N
47E
MDB&M
TRY 48
NMC 2712
Lander
LODE 17
SE
28N
47E
MDB&M
TRY 49
NMC 2711
Lander
LODE 17
SW
28N
47E
MDB&M
TRY 50
NMC 2710
Lander
LODE 17
SW
28N
47E
MDB&M
TRY 51
NMC 2709
Lander
LODE 17
NW SW
28N
47E
MDB&M
TRY 52
NMC 2708
Lander
LODE 17
NW SW
28N
47E
MDB&M
TRY 53
NMC 2707
Lander
LODE 17
NW
28N
47E
MDB&M
TRY 54
NMC 2706
Lander
LODE 17
NW
28N
47E
MDB&M
TRY 55
NMC 2705
Lander
LODE 17
NW
28N
47E
MDB&M
TRY 56
NMC 2704
Lander
LODE 17
NW
28N
47E
MDB&M
TRY 57
NMC 2703
Lander
LODE 17
NW
28N
47E
MDB&M
TRY 58
NMC 2702
Lander
LODE 17
NW
28N
47E
MDB&M
TRY 63
NMC 2701
Lander
LODE 16
SW
28N
47E
MDB&M
TRY 64
NMC 2700
Lander
LODE 16
SW
28N
47E
MDB&M
TRY 65
NMC 2699
Lander
LODE 16
SW
28N
47E
MDB&M
TRY 66
NMC 2698
Lander
LODE 17
SE
28N
47E
MDB&M
TRY 67
NMC 2697
Lander
LODE 17
SW SE
28N
47E
MDB&M
TRY 68
NMC 2696
Lander
LODE 17
SW
28N
47E
MDB&M
TRY 70
NMC 2695
Lander
LODE 7
SE
28N
47E
MDB&M
TRY 74
NMC 2694
Lander
LODE 8
SE
28N
47E
MDB&M
TRY 75
NMC 2693
Lander
LODE 16
NW SW
28N
47E
MDB&M
TRY 80
NMC 2692
Lander
LODE 7
SE
28N
47E
MDB&M
TRY 81
NMC 2691
Lander
LODE 18
NE
28N
47E
MDB&M
TRY 82
NMC 2690
Lander
LODE 18
NE
28N
47E
MDB&M
TRY 83
NMC 2689
Lander
LODE 18
NE
28N
47E
MDB&M
TRY 84
NMC 2688
Lander
LODE 18
NE SE
28N
47E
MDB&M
TRY 85
NMC 2687
Lander
LODE 18
SE
28N
47E
MDB&M
TRY 86
NMC 2686
Lander
LODE 7
SE
28N
47E
MDB&M
TRY 88
NMC 2685
Lander
LODE 7
SE
28N
47E
MDB&M
 
 
 
Coral Gold Resources Ltd. 4-17 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Claim Name
BLM Serial No.
County
Type
Section
Township
Range
Meridian
TRY 89
NMC 2684
Lander
LODE 7
SE
28N
47E
MDB&M
TRY 90
NMC 2683
Lander
LODE 8
SW
28N
47E
MDB&M
TRY 91
NMC 245901
Lander
LODE 7
NW SW
28N
47E
MDB&M
TRY 92
NMC 245902
Lander
LODE 7
NW SW
28N
47E
MDB&M
TRY 93
NMC 245903
Lander
LODE7
NW
28N
47E
MDB&M
TRY 94
NMC 280680
Lander
LODE 9
NW
28N
47E
MDB&M
TRY 95
NMC 280681
Lander
LODE 9
NW
28N
47E
MDB&M
TRY 96
NMC 280682
Lander
LODE 9
NW
28N
47E
MDB&M
TRY 97
NMC 330612
Lander
LODE 6
SE
28N
47E
MDB&M
TRY 98
NMC 330613
Lander
LODE 6
SE
28N
47E
MDB&M
TRY 99
NMC 330614
Lander
LODE 6
SE
28N
47E
MDB&M
View 1
NMC 928587
Lander
LODE 5
SW
28N
47E
MDB&M
View 10
NMC 928596
Lander
LODE 6
NW SW
28N
47E
MDB&M
View 11
NMC 928597
Lander
LODE 6
NW
28N
47E
MDB&M
View 13
NMC 935489
Lander
LODE 6
NW
28N
47E
MDB&M
View 14
NMC 935490
Lander
LODE 6
SW
28N
47E
MDB&M
View 15
NMC 935491
Lander
LODE 6
SW
28N
47E
MDB&M
View 16
NMC 935492
Lander
LODE 6
SW
28N
47E
MDB&M
View 17
NMC 980312
Lander
LODE 6
NW
28N
47E
MDB&M
View 18
NMC 980313
Lander
LODE 6
NW
28N
47E
MDB&M
View 19
NMC 980314
Lander
LODE 6
SW
28N
47E
MDB&M
View 2
NMC 928588
Lander
LODE 5
SW
28N
47E
MDB&M
View 20
NMC 980315
Lander
LODE 6
NE
28N
47E
MDB&M
View 21
NMC 980316
Lander
LODE 6
SE
28N
47E
MDB&M
View 22
NMC 980317
Lander
LODE 6
NW
28N
47E
MDB&M
View 23
NMC 980318
Lander
LODE 6
SW
28N
47E
MDB&M
View 24
NMC 980319
Lander
LODE 6
SW
28N
47E
MDB&M
View 3
NMC 928589
Lander
LODE 6
NE SE
28N
47E
MDB&M
View 4
NMC 928590
Lander
LODE 6
SE
28N
47E
MDB&M
View 5
NMC 928591
Lander
LODE 6
NE SE
28N
47E
MDB&M
View 6
NMC 928592
Lander
LODE 6
NE SE
28N
47E
MDB&M
View 7
NMC 928593
Lander
LODE 6
NE SE
28N
47E
MDB&M
View 8
NMC 928594
Lander
LODE 6
E NW SW
28N
47E
MDB&M
White Cloud
NMC 108402
Lander
LODE 16
NW
28N
47E
MDB&M
White Cloud Fr
NMC 108403
Lander
LODE 9
SW
28N
47E
MDB&M
WYOD
NMC 57907
Lander
LODE 8
SE
28N
47E
MDB&M
WYOD 1
NMC 57908
Lander
LODE 8
SE
28N
47E
MDB&M
WYOD 2
NMC 57909
Lander
LODE 8
SE
28N
47E
MDB&M
WYOD 3
NMC 57910
Lander
LODE 8
SE
28N
47E
MDB&M
XRay
NMC 108379
Lander
LODE 9
SW
28N
47E
MDB&M
 
 
 
Coral Gold Resources Ltd. 4-18 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
SECTION 5.0 ACCESSIBILITY, CLIMATE, LOCAL RESOURCES,
 
INFRASTRUCTURE AND PHYSIOGRAPHY
 
5.1 ACCESSIBILITY
 
The property is 58 miles southeast of Battle Mountain and 70 miles southwest of Elko, NV (Figure 4- 1). From Battle Mountain, the county seat, the property is reached by traveling 28 miles east on Interstate Highway 80, then 29 miles south on Nevada Highway 306 which passes through to the Coral property turn off. The property is reached by driving two miles west on a well maintained gravel road. A network of unimproved dirt roads and tracks provide access to the remainder of the property.
 
5.2 CLIMATE AND PHYSIOGRAPHY
 
The Robertson Property is situated in the Tenabo sub-district of the Bullion mining district, within a series of low foothills on the extreme eastern flank of the Shoshone Mountains near the abandon town site of Tenabo. The climate is arid to semi-arid, with high annual insolation, low annual precipitation and large daily temperature fluctuations. Altitude on the project varies from 5,000 ft to 6,281 ft above mean sea level. Vegetation is typical of the Great Basin Desert Shrub Steppe, comprised of communities of large sage brush, rabbit brush, Sandburg bluegrass and varieties of forbs. Average annual precipitation at the site is less than 7 inches per year, mostly from winter snowfall and sporadic summer afternoon thunderstorms. In the region, the average maximum temperature is 63°F and the average minimum temperature is 30°F. Mid-winter day-time temperatures average 24°F and mid-summer day-time temperatures average 90°F.
 
5.3 LOCAL RESOURCES AND INFRASTRUCTURE
 
Land ownership within the Robertson Property project area consists of federal surface and minerals within the Shoshone-Eureka Resource Area, administered by the Mount Lewis Field Office of the Bureau of Land Management. According to the BLM, principal land uses within the project area are mining, wildlife habitat and livestock grazing. Portions of the project area are subject to BLM livestock grazing permits.
 
Because the “Komp” well, the previous source of water for past mining and exploration activities at Robertson Property is no longer operational, water is available with permission, from the Barrick Cortez mining operation as a result of their de-watering operations at the nearby Pipeline mine. A series of infiltration ponds are located Section 22, T. 28 N., R. 47 E. which can provide sufficient water for future exploration activities. Water to support mining operations at Robertson likely will likely require new production wells.
 
A paved state highway provides access to within 2 miles of the property and a major power line that currently provides electrical power to a nearby operating mine crosses the east edge of the property. Surface rights at Robertson are sufficient to support a major mining operation. Experienced mining personnel are available in the nearby communities of Elko and Battle Mountain.

 
 
Coral Gold Resources Ltd. 5-1 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
SECTION 6.0 HISTORY
 
6.1 INTRODUCTION
 
The Robertson property is located in the Tenabo area, a sub-district of the Bullion mining district. Historic lode mining in the sub-district dates from about 1905 with a total production of 20,000 ounces of gold credited to the mines of the area (Stager, 1977). Placer gold was discovered in many of the dry washes in the Tenabo area in 1916. During the period 1937-39, a small dragline dredge and washing plant operated in the district, and a dredge was reported by Humphrey (1945) to be operating in lower Mill Gulch in 1945. Placer production is estimated to have yielded $25,000 worth of gold and minor amounts scheelite (Johnson, 1973).
 
During the period 1966-70, a number of companies explored the district in search of porphyry copper-style mineralization. In 1968, while drilling a series of shallow rotary holes near the Gold Pan mine, Superior Oil discovered a small, but relatively high-grade zone of gold at shallow depths in what is now known as the Gold Pan Zone. However, with additional drilling, Superior quickly lost interest in the district. They were soon followed by a number of mainly Vancouver-based junior mining companies, including Placer Development (1974-75), Teck Corporation (1977), Aaron Mining Ltd. (1975-86), and E & B Exploration Ltd. (1980-81), all of whom sporadically explored the Tenabo area with limited success. A summary of the drilling completed by these companies prior to Coral’s involvement (1986) is presented in Table 6.1. The locations of these holes are shown in Figure 5-1.
 
Table 6.1: Summary of Pre-Coral Drilling Activities at Robertson.
 
   
Date of
 
Number and Type
 
Drill
   
Company
 
Activity
 
of Holes Drilled
 
Footage(ft)
 
Target
Superior Oil
    1968-70  
92(?)Conv. Rotary
    c. 32,000  
Gold Pan
Placer Dev.
    1973-74  
23(?)Conv. Rotary
    c. 3,500  
none
Teck Corp.
    1977  
none
 
    none
 
none
Aaron
    1977  
7 Conv. Rotary
    c.300  
Gold Quartz
E & B Exploration
    1980-81  
148 RC(?)
    30,807  
Gold Pan
Totals
       
270
    65,407    

Modern open pit mining and heap leaching began as early as 1974, when Aaron Mines, Ltd., initiated a pilot leach operation. Aaron placed about 15,000 tons of oxide material mined from the “glory hole” and waste dumps of the historic Gold Quartz mine on a small leach pad, from which 377 ounces of gold were recovered (Stevenson & Assoc., 1977). During the period 1978-80, Aaron placed 38,400 tons of ore on a second larger pad, from which they recovered 517 ounces of gold (Sampson, 1988). Also during that period Aaron continued exploration and began consolidating and acquiring claims in the district.
 
6.2 CORAL GOLD CORP. (1986-1989)
 
In 1986, Coral acquired Aaron's interest in the property and immediately began a series of major drilling programs beginning in 1986 and continuing until 1989. By 1988, Coral had reportedly defined a reserve of 11 million tons averaging 0.04 ozAu/t (NBMG, 1989). Mining operations commenced in 1988, but were suspended less than one year later. During the operating life of the

 
 
Coral Gold Resources Ltd. 6-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property

Robertson mine, approximately 350,000 tons of low-grade material was placed on leach pads from which about 6,200 ounces of gold were recovered.
 
During the period 1986 through 1989, Coral completed approximately 380 RC holes and 7 DDH, totaling about 109,377 ft. Much of this drilling was focused in four resources areas; Gold Pan, Gold Quartz, Gold Quartz extension (also called Gold Quartz West) and in the Triplet Gulch area. The purpose of this drilling was to determine the limits and continuity of mineralization within these zones. Nearly all of the RC holes were drilled vertically to an average depth of about 300 ft. The locations of the Coral drill holes and the four resource areas are shown in Figure 6-2.
 
During the later stages of Coral’s exploration program, they completed two “deep” RC holes that reached depths of 1,400 ft and 1,810 ft, respectively. In addition to resource definition, Coral also embarked on a program of district-wide exploratory and follow-up drilling of numerous surface anomalies.
 
6.3 AMAX GOLD (1990-1996)
 
In 1990, Coral and Amax Gold Exploration entered into an Amended and Restated Option and Earn-In Agreement in which Amax could earn a 60 percent interest in the property by producing a bankable feasibility study. From 1990, until they withdrew from the venture in 1996, Amax completed a district-wide exploration program that included drilling 342 RC holes and 62 DDH, totaling over 176,000 feet. The locations of the Amax drill holes are shown on Figure 6-3.
 
During this time period, Amax discovered a number of mineralized zones which comprised a low-grade, drill-indicated resource of over 1 million ounces of gold. These resources are summarized below in Table 6.2. In 1994, Amax began close-spaced grid drilling of the Porphyry Zone resource to define a mineable reserve to serve as a basis for completing a bankable feasibility study (Amax, 1994). The resulting reserve of about 14 million tons averaging 0.019 and containing about 180,000 recoverable ounces of gold was deemed marginal at a gold price of $400/oz. The historic mineral resource and mineral reserve estimates cited in Table 6.2 and discussed above are presented for the purpose of historic background only and do not represent defined mineral resources on the property. In addition, the classification of these historic mineral resources and reserves do not conform to the National Instrument 43-101.
 
Table 6.2: Robertson Property Drill-Indicated Resources (1996).
 
Mineralized
 
Million
   
Grade
   
Contained
 
Zones
 
Tons
   
( ozAu/t)
   
Ounces
 
Altenburg Hill**
  3.5     0.018     63,900  
Porphyry Zone*
  20     0.02     400,000  
Gold Pan**
  8.3     0.024     199,200  
39A Zone
  4.7     0.077     367,190  
Total
  36.5     0.028     1,030,290  

* Includes AGI proven + probable reserve 13,556,125 tons at an average grade of 0.0188 (1994).
** Inferred mineral resources estimated by AGI (1996).

 
 
Coral Gold Resources Ltd. 6-2 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
 
6.4 CORTEZ GOLD MINES (1998-1999)
 
In 1998, Cortez entered into an Option and Earn-In Agreement with Coral in which Cortez could earn a 70 percent interest in the Robertson property by producing a bankable feasibility study. The focus of their exploration was to expand the 39A Zone and test a number of outlying targets. During 1999, Cortez completed 46 RC drill holes and a single mud rotary hole, totaling 57,000 ft. Of the thirteen holes directed at expanding the 39A Zone only two holes, 99401 (130 ft/0.05 ozAu/t) and 99413 (80ft/0.163 ozAu/t), encountered significant mineralization. However, this drilling program did little to expand the resource. Of the remaining holes drilled by Cortez, only two holes (99406 and 99419) encountered significant mineralization. Both holes were designed to offset and (or) follow up existing drill intersections and surface gold anomalies. The locations of the Cortez drill holes are shown in Figure 5-4.
 
After completing this drilling program, Cortez declared its interest in renegotiating the terms of the Option Agreement. When Coral declined, Cortez subsequently terminated the agreement and did not earn an interest in the property.
 
6.5 CORAL GOLD RESOURCES LTD (2001-2010)
 
6.5.1 Coral Drilling Programs (2004-2010)
 
During 2004 and 2005, Coral conducted three drilling programs consisting of 32 RC holes totaling 24,020 ft on the Robertson Property (McCusker, 2004, 2005). The focus of this exploration was to expand and further define the 39A Zone, test the “deep” Gold Pan Zone for extensions of the 39A Zone and offset previous mineralized intersections in the “distal target area”. The locations of the Coral drill holes are shown in Figure 6-5
 
During 2006, Coral completed a two phase drilling program. Phase I consisted of drilling 14 RC holes totaling 11,355 ft, which were completed in the immediate vicinity of the existing 39A Zone indicated mineral resource. The purpose of Phase I drilling was to define the “economic margins” of the 39A mineralized zone and to test the continuity of higher grade intersections between wide spaced drill holes. Phase II drilling consisted of drilling 32 RC holes totaling 24,260 ft, which were completed in the Distal Zone, on the northeast flank of Altenburg Hill, in the gravel-covered area between the Altenburg Hill and the Porphyry Zone and along a northeast striking structural zone in the Porphyry Zone. Several of these holes were also used to test the north and northwest edges of 39A Zone (Coral Gold, 2007). The locations of the 2006 Coral drill holes are shown in Figure 6-6.
 
In 2007, the NDEP required Coral to consolidate previous amendments to the Plan of Operation before they would consider approving a new amendment. As a result no drilling was conducted on any of the defined mineral resources during 2007. Instead Coral was able to complete two deep flooded RC holes (TV07-1 and TV07-2) totaling 6,440 ft, in the extreme northwest part of the Robertson claim block under a Notice of Intent (TRY/View Notice). The purpose of the 2007 deep drilling program was to discover high-grade Carlin-type gold deposits on the Robertson Property hosted by favorable strata in the lower plate of the Roberts Mountains thrust fault. Drill targets were selected based on the coincidence of multi-element soil and rock chip geochemical anomalies with mapped faults having strong geophysical expressions that identified certain structures as major fluid conduits (McCusker, 2008). The locations of the 2007 deep drill holes are shown in Figure 6-6
 
The 2008 drilling program consisted of 34 RC holes totaling 22,835 ft to further define and expand the Altenburg Hill, South Porphyry, 39A and Distal mineralized zones. A total of 15 holes (7,270 ft) were completed on Altenburg Hill and 6 holes (3,000 ft) were drilled in the S. Porphyry zones to offset and infill known mineralization. At the 39A zone, eight holes (6,645 ft) were completed in an effort to expand the resource to the northwest and northeast and 5 offset holes (5,920 ft) were drilled in the Distal zone.

 
 
Coral Gold Resources Ltd. 6-3 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
No exploration was conducted at Robertson in 2009.
 
In 2010, Coral conducted a 12 hole RC program to evaluate the lower Triplet gulch resource (also called the South Zone resource). The drilling program consisted of 12 vertical RC holes totaling 8,000 ft, drilled on a grid with holes spaced 500 ft apart on lines also spaced 500 ft apart. Hole depths ranged from 600 ft to 1,000 ft. Only two of the 12 RC holes, CR10-7 and -8, were completed to 1,000 ft (McCusker, 2010). The locations of the 12 RC holes drilled during 2010 are shown in Figure 6-7.
 
Also in 2010, Coral completed 14 HQ diameter diamond core holes totaling 6,350 ft and ranging from 400 ft to 550 ft deep. This limited program was designed to twin 12 existing RC holes in the Altenburg Hill (9 holes), S. Porphyry (1 hole) and Gold Pan (4 holes) zones in order to evaluate the reliability of the RC drilling and to provide samples for metallurgical testing. The location of the 14 diamond drill holes are shown in Figure 6-7.
 
6.5.2 Coral Resource Studies (2001-2010)
 
Prior to 2001, the earliest resource estimate that was made on any of the currently defined resources was in 1988 by Mintec Inc., using various cutoff grades for the Gold Pan Zone. An estimate of the 39A Zone resource was made by Amax in 1993, based on only 21,000 ft of drilling in 25 holes and using a 0.02 ozAu/t cutoff grade. In 1994, Amax and MRDI jointly completed a resource estimate for the Porphyry Zone as part of a feasibility study. The study concluded that a proven + probable mineral reserve was present, but was deemed “marginal” at the current gold price ($420/oz).
 
In 1996, after completing grid and in-fill drilling in the Gold Pan and Altenburg Hill zones, Amax completed resources estimates for these mineralized zones using a 0.01 ozAu/t cutoff grade. Results of these studies indicated that while a low-grade “drill indicated resource” was present, it did not represent a potential “mineable reserve which is of interest to Amax” (Candee, 1996).
 
In 2001, Coral Gold contracted R.T. McCusker Geological consulting to prepare a review of previous drilling activities and provide a resource summary. The study concluded that at the prevailing gold prices of less than $300/oz, a resource containing about 11 million short tons of mineralized material averaging 0.053ozAu/t, at an 0.02ozAu/t cutoff grade, were present on the Robertson property (Table 6.3).
 
In late 2005, Barnes Engineering was contracted by Coral Gold Resources to undertake a Preliminary Assessment of the currently defined mineral resources at the Robertson Property. The purpose for of this study was to update the 2001 resource estimate, include results of the 2004-2005 Coral drilling programs (24,000 ft) in the estimate and examine the effect of higher gold price on the economics of the existing resources.

 
 
Coral Gold Resources Ltd. 6-4 January, 2012
 
Preliminary Economic Assessment   Robertson Property

Table 6.3: Robertson Property Indicated Resource Estimate (McCusker, 2001).
 
   
Cutoff Grade
ozAu/t
   
Million
tons
   
Grade
ozAu/t
   
Contained
Ounces
 
Zone
                       
39 A   0.02     2.8     0.101     282,800  
39A *   0.05     1.54     0.13     200,000  
Porphyry
  0.02     3.95     0.04     158,000  
Gold Pan**
  0.02     2.97     0.038     112,900  
Altenburg Hill
  0.02     1.25     0.024     30,000  
Total
        10.97     0.053     583,700  

*Note 39A resource estimate at 0.05ozAu/t cutoff not used in total calculation. **From Mintec Inc., 1988 estimate; includes oxide + sulfide material.
 
In 2006, the Robertson mineral resources were reported using gold cutoff grades calculated by Barnes Engineering is shown in Table 6.4. Inferred mineral resources were calculated by R.T. McCusker Geological consulting and are presented in Table 6.5.
 
Table 6.4: Robertson Property Measured and Indicated Mineral Resources (Barnes, 2006).
 
   
Measured mineral
resources
   
Indicated mineral
resources
         
Total measured
and indicated
 
   
Tons
   
Grade
   
Contained
   
Tons
   
Grade
   
Contained
   
Tons
   
Grade
   
Contained
 
Zone
  (000’s)    
ozAu/t
   
ozs (000’s)
    (000’s)    
ozAu/t
   
ozs (000’s)
    (000s)    
ozAu/t
   
ozs (000’s)
 
Porphyry1
  10,600     0.020     212     2,100     0.018     37     12,700     0.020     249  
39A/Gold Pan2
                    10,200     0.044     450     10,200     0.044     450  
Total
  10,600     0.020     212     12,300     0.040     487     22,900     0.031     699  
 
(1) Calculated using a 0.010 ozAu/t cutoff grade. (2) Calculated using a 0.015 ozAu/t cutoff grade.
 
Table 6.5: Robertson Property Inferred Mineral Resources (McCusker, 2006) Inferred Mineral Resources
 
   
Tons
   
Grade
   
Contained
 
Zone
  (000’s)    
(ozAu/t)
   
ozs (000’s)
 
Altenburg Hill1
  3,500     0.018     63  
39A/Gold Pan2
  4,900     0.039     192  
Distal Target3
  1,008     0.178     179  
Total
  9,408     0.046     434  

(1), (2), (3) Estimates calculated using 0.01 ozAu/t, 0.015 ozAu/t and 0.05 ozAu/t cutoff grades respectively.
 
In 2007 Coral contracted Beacon Hill Consultants to prepare an updated mineral resource estimate as part of a new NI 43-101 technical report. The new resource study included the 2006 drilling results (35,615 ft) and examined the effect of higher gold prices on the resources. In January 2008, Beacon Hill reported an inferred mineral resource estimated to contain 91.3 million tons averaging 0.0253 ozAu/t and containing about 2.3 million ounces of gold at a cutoff grade of 0.015 ozAu/t (Table 6.6).
 
 
 
Coral Gold Resources Ltd. 6-5 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
Table 6.6: Inferred Mineral Resource Estimate for Robertson Property (Beacon Hill, 2008).
 
 Zone   Tons       OzAu/t     
Ounces
 
Distal
  10,335,041     0.0335     346,224  
39A   25,010,247     0.0287     717,794  
South Zone
  5,904,713     0.0269     158,837  
Outside
  2,187,500     0.0208     45,500  
Gold Pan Oxide
  7,049,181     0.0262     184,689  
Altenburg Hill Oxide
  4,558,402     0.0208     94,815  
Porphyry Oxide
  19,121,927     0.0213     407,297  
Gold Pan Sulphide
  12,053,279     0.0208     250,708  
Altenburg Hill Sulphide
  584,016     0.0176     10,279  
Porphyry Sulphide
  4,480,533     0.0223     99,916  
TOTAL   91,284,840     0.0253     2,309,506  
 
·  
Gold ounces were calculated on the basis of US$600/oz Au and 70% Au recovery.
·  
The 0.015 ozAu/t cut-off grade, utilized to report the resource, was derived from a mining cost of US$1.02/ton, process cost of US$5.00/ton and waste cost of US$1.14/ton.
·  
The mineral resources in the table above were estimated using the CIM Standards on Mineral Resources and Reserves. This resource is compliant with NI 43-101 regulations.
 
In October 2009, Coral announced a revised mineral resource estimate incorporating the 2008 drilling results (22,835 ft) and a higher gold price. Using a 0.0106 ozAu/t cutoff grade based on a three year rolling average gold price of $850/oz, Beacon Hill calculated an inferred mineral resource containing nearly 179 million tons averaging 0.0189 ozAu/t and containing nearly 3.4 million oz of gold.
 
Table 6.7: Inferred Mineral Resource Estimate for Robertson Property (Beacon Hill, 2009)
 
Zone
 
Tons
   
OzAu/t
   
Oz Au
 
Distal
  13,310,451     0.0287     382,010  
39A   38,945,698     0.0228     887,962  
South Zone
  9,993,853     0.0209     208,872  
Outside
  5,422,131     0.0156     84,585  
Gold Pan Oxide
  12,566,599     0.02     251,332  
Altenburg Hill Oxide
  12,873,976     0.0152     195,684  
Porphyry Oxide
  39,049,182     0.0167     652,121  
Gold Pan Sulphide
  32,524,592     0.0154     500,879  
Altenburg Hill Sulphide
  1,701,844     0.014     23,826  
Porphyry Sulphide
  12,535,861     0.0158     198,067  
TOTAL
  178,924,188     0.0189     3,381,667  

Resource estimate parameters:
 
·  
Gold ounces were calculated on the basis of US$850/oz Au and 70% Au recovery.
 
·  
The 0.0106 ozAu/t cut-off grade utilized to report the resource was derived from a mining cost of US$1.02/ton, process cost of US$5.00/ton and waste cost of US$1.14/ton.
 
·  
The mineral resources in the table above were estimated using the CIM Standards on Mineral Resources and Reserves.

 
 
Coral Gold Resources Ltd. 6-6 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
·  
The database comprised a total of 1,160 drill holes, 533,453 feet (162,638 meters) of drilling and 101,757 gold assays.
 
·  
The inferred resource covers 6 distinct and separate areas; Distal, 39A, Gold Pan, Porphyry, Altenburg Hill, Southern Area and then all remaining blocks outside these areas that warrant inclusion as an inferred resource. In addition, Gold Pan, Porphyry and Altenburg Hill were separated into oxide and sulphide zones for analysis and modeling.
 
·  
An interpreted mineralized envelope was modeled into a solid in MineSight 3DTM, with six area mineralized zones and then separated into oxide and sulphide zones.
 
·  
Block dimensions of 25 feet (7.6 m) north, 25 feet (7.6 m) East and 20 feet (6 m) vertically.
 
·  
Grade interpolation - 20 foot (6 m) composites.
 
·  
Composites greater than 0.075 ozAu/t (2.33 g Au/tonne) limited in influence to 100 feet (30.5 m).
 
·  
Tonnage estimates are based on 200 bulk historic density measurements carried out by previous operators. These were assigned to each block by zone. The resources are categorized as inferred since the amount and distribution of bulk tonnage factor data is sparse.

 
 
Coral Gold Resources Ltd. 6-7 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Figure 6-1: Drill Hole Location Map Pre-Coral Drilling
 
 
 
Coral Gold Resources Ltd. 6-8 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 

Figure 6-2: Coral Gold Corp. Drill Hole Location Map (1986-89)
 
 
 
Coral Gold Resources Ltd. 6-9 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 

Figure 6-3: Drill Hole Location Map Amax Gold Drilling
 
 
 
Coral Gold Resources Ltd. 6-10 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 

Figure 6-4: Drill Location Map Cortez Drilling
 
 
 
Coral Gold Resources Ltd. 6-11 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 

Figure 6-5: Drill Hole Location Map Robertson Property
 
 
 
Coral Gold Resources Ltd. 6-12 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 

Figure 6-6: Map showing locations of the 2007 deep drill holes and USGS Hole No.1.

 
 
 
Coral Gold Resources Ltd. 6-13 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 

Figure 6-7: 2010 drill hole location map.

 
 
 
Coral Gold Resources Ltd. 6-14 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 

SECTION 7.0 GEOLOGICAL SETTING AND MINERALIZATION
 
7.1 REGIONAL GEOLOGY
 
Published geological reports describing the regional geology of the Tenabo district include Gilluly and Gates (1965), Wrucke (1974), Wrucke and Armbrustmacher (1975), and Stewart (1980). The regional geology of the Tenabo area depicted in Figure 7-1 is modified from a map by Wrucke (1974).
 
The Robertson property lies along the far eastern flank of the Northern Shoshone Mountains in north-central Nevada within the Basin and Range physiographic province of western North America. The region lies at or very near the rifted margin of continental crust which was subjected to periodic contractual deformation starting in Middle Paleozoic and continuing until Late Cretaceous (Stewart, 1980, Oldow, 1984). The most important of these events affecting the region is a complex set of branching, low-angle faults that are part of the Roberts Mountains thrust fault (RMT). Forming the upper plate of this regionally significant structure are a series of thick, vertically stacked nappes of predominately dark-gray, fine-grained siliceous sedimentary and lesser submarine volcanic rocks of early to middle Paleozoic age. During latest Devonian or earliest Mississippian time, these eugeosynclinal rocks were transported eastward many tens of miles along segments of the RMT and structurally emplaced over a mostly carbonate sequence of similar age that comprise the lower plate. While siliceous rocks of the upper plate are widespread in the region, carbonate rocks of the lower plate are comparatively rare and are exposed in a few “structural windows” such as the Gold Acres and Cortez windows. Many of the regions gold deposits, including Gold Acres, Cortez, Cortez Hills and Pipeline are within or near to structural windows of lower plate carbonate rocks (Roberts, 1966).
 
Subduction-related calc-alkaline magmatism began as early as Middle Jurassic and continued through early Miocene time (Stewart, 1980). Beginning in the late Eocene, an important episode of magmatism gradually swept from northeast to southwest across northern Nevada which was accompanied by widespread extensional deformation (Christiansen and Yeats, 1992). Many of the regions largest gold deposits, including those situated along the Carlin and Battle Mountain-Eureka trends, are both spatially and temporally related to this period of calc-alkaline Eocene magmatism and extensional tectonics (Ressel and Henry, 2006). Starting about 17 Ma, regional extensional block faulting, accompanied by rift-related bimodal basalt-rhyolite magmatism, further modified the region resulting in the characteristic basin and range topography encountered in this part of Nevada (Dickinson, 2002).
 
7.2 LOCAL GEOLOGY
 
The Robertson property covers a series of low hills along the west side of Crescent Valley. The property, including the adjacent “Excluded” claims, lies approximately one mile north of the Pipeline open pit gold mine and reaches 4.5 miles north to Indian Creek. The geology of this area is depicted in Figure 7-2. Most of this area is underlain by a thick sequence of mostly fine-grained, siliceous sedimentary rocks that are part of the Roberts Mountains allochthon (RMA). These highly faulted and folded rocks are dominated by middle to late Devonian Slaven Chert composed mainly of argillite, chert, lesser shale, siltstone and mafic submarine volcanic rocks. Structurally overlying the Slaven Chert along the west, north and east sides of the property are a sequence of rusty brown weathering siltstone, sandstone and very minor limestone of the Silurian Elder Sandstone. Along the far west edge of property, many of these rocks are structurally overlain along the Lander thrust fault by massive quartzite of the Ordovician Valmy Fm.
 
 
 
Coral Gold Resources Ltd. 7-1 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 

Portions of the “Excluded” claims in the southwest part of the property cover the northern part of the Gold Acres structural window, which exposes a sequence of mostly carbonate rocks in the lower plate of the RMT. These strata consist of silty limestone, weakly to non-calcareous siltstone, calcareous mudstone and argillite of the Devonian-lower Mississippian Pilot Shale (Wrucke, 1974). However, this unit is remarkably similar to the Devonian-lower Mississippian Rodeo Creek Fm as described from the Carlin Trend (Lenardson and Rahn, 1996) where it overlies the Devonian Popovich Limestone. At Gold Acres, this unit conformably (?) overlies thin to thick bedded argillaceous to micritic limestone of the Middle Devonian Wenban Limestone which in turn conformably overlies a sequence of predominately finely laminated calcareous siltstone of the Silurian Roberts Mountains Fm.
 
Intruding a portion of the upper plate sequence, at the north end of the property, is an elliptical shaped granodiorite stock or lacolith (?), along with related dikes and sills that vary in composition from dacitic to rhyolitc. In its long dimension, the Tenabo granodiorite is exposed for 6,000 ft in an east-west direction and over 3,000 ft in a north-south direction. Its long axis is oriented at about 280°, whereas a set of prominent dike swarms strike approximately 300° to 340°. In addition, the district is transected by a series of E-W-striking sericite-altered feldspar-porphyry dikes that are exposed for at least 3.5 miles. Based on intrusive relationships the feldspar porphyry dike swarm appears to be intra-mineral, cutting early Au-Ag (Cu) mineralization but is cross cut by later Ag-Au +As-base metal veining.
 
A series of recent K-Ar age dates indicate that emplacement of the stock took place about 39.35+0.07 Ma (Henry, 2011, written communication). A single Re-Os date on molybdenite from the Tenabo stock yielded an age of 39.0+1.4 Ma (Kelson, et al., 2005) and K/Ar age dates on adularia and sericite indicate that and the age of gold and base metal mineralization is 39.08+0.08 Ma (Henry, 2011, written communication). Based on two new K-Ar dates, emplacement of widespread post-mineral rhyolite porphyry dikes and sills is dated at 35.8+0.07 Ma (Henry, written communication). Gold mineralization at Robertson is closely associated with emplacement of the Tenabo stock.
 
7.3 ROBERTSON PROPERTY STRUCTURES
 
Mineralization at Robertson is strongly controlled by a system of low- and high-angle faults and related fracture zones. Locally, brecciation associated with the granodiorite and hornfels contact zones and to a lesser extent axial plane shears in isoclinal folds are also important hosts for mineralization. Although individual structures host ore-grade gold, higher grades commonly occur where one or more structures intersect.
 
7.3.1 Low-Angle Faults
 
Rocks of the district are cut by a myriad of low-angle thrust faults associated with the emplacement of the Roberts Mountains allochthon. Reactivation of these faults during emplacement of the Tenabo intrusive complex created an important fracture system that, in combination with younger high-angle faults and/or favorable lithology, strongly control the distribution gold at Tenabo. A major low-angle structural zone is thought to be the principal control of gold distribution in a broad area extending from hole AT-1 westward to 99445, a distance of over 3,000 ft, and containing the 39A and Distal zone mineral resources. Detailed logging has shown that portions of this low-angle structural zone are filled by a series of sill-like intrusions that form within or parallel to the broad envelope of mineralization and (or) alteration. In addition, at least two narrow and laterally persistent zones of open space quartz and sulfide filling and local sulfide replacement are developed within and along a series of low-angle faults with similar orientation as the principal fault system. The sulfide horizons are locally disrupted by post-mineral movement along these same low-angle faults. These relationships are summarized in Figure 7-3, a cross section oriented north-northeast and looking west. The location of C-C’ is shown in Figure 7-4.
 
 
 
Coral Gold Resources Ltd. 7-2 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 

7.3.2 NNW and East-West High-Angle Faults
 
In addition to the flat-lying thrust faults associated with reactivated segments of the RMT, rocks of the district are broken and offset by series of NNW-striking high-angle faults. Many of these faults extend (?) through the Eocene-age stock and are filled locally by younger dikes. Gold mineralization appears closely associated with NNW faults. A less obvious, but important east-west fault system occurs along the north side of the granodiorite stock which likely controlled emplacement of the granodiorite stock itself, as well as, the later feldspar porphyry dike swarm. At least two east-west and (or) north-northwest faults are postulated to have controlled mineralization within the 39A Zone. Where these faults intersect the principal low-angle fault zone, mineralization is typically thicker and higher grade. Movement along these faults is suspected to be, at least in part, sinistral. Within the Gold Pan zone, higher grade mineralization forms a series of en echelon ore shoots that trend generally east-west and are thought to be controlled by this fault zone.
 
7.3.3 Northeast and North-South High-Angle Faults/Dikes
 
A subtle NE-trending structural fabric is reflected mainly by a number of dike-filled faults and the apparent control exerted on the distribution of gold mineralization. In the Porphyry Zone, high-grade gold is commonly associated with a series of sub-parallel, NE striking faults locally filled by granodiorite and (or) igneous breccia dikes. The highest grades (0.94 ozAu/t) in the Porphyry Zone occur at or near the contacts of the dikes where they intersect prominent N-S faults. However, the overall trend of ore-grade (>0.01 ozAu/t) mineralization in the Porphyry Zone is north-south.
 
7.3.4 Folds
 
Paleozoic-age upper plate rocks of the district are locally folded into small-scale isoclinal folds that typically strike NNW and plunge 50 to 150 to the NNW. This fold orientation is largely confined to the Devonian Slaven Chert. Strong shearing and brecciation are often well developed along many fold axial planes creating additional structural disruption in the rocks and sites for gold deposition.
 
In contrast, a series of broad, NE-striking open folds are developed in a nappe (?) of Silurian Elder Sandstone along the northeast part of the property. This variation in fold orientation and style suggests that these thrust sheets were emplaced separately and from different directions. A similar, broad anticlinal fold is developed in the Porphyry Zone that is more or less coincident with mineralization. This fold, which strikes N-S, is thought to have formed partly in response to emplacement of the Tenabo stock. Mineralization in this zone is strongly controlled by faulting in the footwall of a thick dike/sill. Any influence on the localization of the mineralization by this fold is unclear.
 
Recent geologic mapping and compilation has defined at least one prominent and potentially important fold along the west side of the Robertson Property (McCusker, 2007). The Shoshone antiform strikes about N-S and appears to plunge gently northward. The axis of this fold lies slightly west of the prominent ridge separating the Robertson claims from the “Excluded” claims. Because of the many small-scale folds, the Shoshone antiform is not well defined by bedding attitudes alone. However, the general pattern and “stratigraphic” position of certain units (greenstone and Elder Sandstone) provide convincing evidence for the existence of this structural feature. The fold is best defined in the northern half of the property even though it is disrupted by a series “major” NNW-striking high-angle faults. Many of these mapped faults coincide with major geophysical features and abrupt topographic breaks that interrupt the current ridge line.
 
 
 
Coral Gold Resources Ltd. 7-3 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
This fold also affects both the plane of the RMT and lower plate strata where it is defined by bedding attitudes in outcrop, from measurements in drill cores and stratigraphic re-construction based on drill logs (McCusker, 2007). As defined in lower plate rocks, the N-S trending fold is broadly asymmetric with a shallow dipping west limb and steep or possibly overturned eastern limb. Because of disruption due to NE- and NNW-striking high-angle faults, the actual strike of the fold is unknown. However, its general trend appears to be N-S.
 
As a result of late Tertiary Basin and Range block faulting, rocks along the east side of the northern Shoshone Range, including the Tenabo area, have been tilted as much as 10° to 15° to the east (Gilluly and Gates, 1965). This post-mineral tilting resulted in the rotation of the large diorite dike in the Porphyry zone, leading to the original interpretation that this intrusion was a thick sill. The tabular mineralized zone associated with the footwall of the diorite dike was also rotated eastward, resulting in a shallow westward dip.
 
 
 
Coral Gold Resources Ltd. 7-4 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
 
Figure 7-1: Regional Geology Map
 
 
 
Coral Gold Resources Ltd. 7-5 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 

Figure 7-2: District Geology Map

 
 
 
Coral Gold Resources Ltd. 7-6 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 

Figure 7-3: “Typical” cross section through 39A Zone looking west.

 
 
 
Coral Gold Resources Ltd. 7-7 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
 
7.4 MINERALIZED ZONES
 
The currently identified mineral resources occur in five zones localized along the northern and eastern contact of the Tenabo granodiorite, forming a general east-west trend. These resources include Porphyry, Gold Pan, Altenburg Hill, 39A and Distal Zones (Figure 7-4). The Porphyry, Gold Pan and Altenburg Hill Zones occur in highly fractured hornfels and skarn units at the contact of the granodiorite stock, whereas the 39A Zone is localized at the intersection of a series of high-angle faults with a major low-angle structural zone in retrograde-altered hornfels. In addition, an emerging mineralized zone referred to as the Distal Zone occurs 1,500 ft northwest of the 39A Zone and at least 2,200 ft from the nearest exposure of Tenabo granodiorite. Gold in the Distal Zone occurs in weakly retrograde-altered quartz and calc-silicate hornfels and skarnoid.
 
7.4.1 Porphyry Zone
 
In 1994, Amax defined a proven + probable + inferred “mineable reserve” in the Porphyry Zone, using a 0.01 ozAu/t cutoff grade that contained 14 million short tons averaging 0.019 ozAu/t. These historic reserves are presented for informational purposes only and do not represent current reserves at Robertson.
 
The Porphyry Zone was re-evaluated in 2009 using a gold cutoff grade of 0.0106 ozAu/t and was estimated to contain a total inferred mineral resource of 51.6 Mt (oxide + unoxidized) containing about 850,188 ounces of gold. Approximately 156 RC and 51 diamond core holes define a tabular mineralized zone that dips 30º to 45º west, ranges from 50 ft to over 250 ft thick, reaches over 500 ft down dip and has a strike length of nearly 3,000 ft. Depth to the top mineralization varies from 5 ft to 30 ft in the south and 125 ft in the north. Mineralization is mainly fracture controlled with lesser amounts occurring as Approximately one-third of the Porphyry Zone gold resource is mainly fracture controlled hosted by a fine-grained margin phase of the Tenabo granodiorite (also called diorite) and two-thirds are hosted by biotite, quartz hornfels and retrograde skarn in Elder Sandstone. Locally, higher grade gold values occur as narrow replacement horizons in retrograde skarn. The Porphyry Zone is intruded at least two sets of dikes: a NE-striking set that is spatially associated with higher gold grades and an E-W-striking set of sericite-altered, post-mineral dikes that dip moderately to the south. The E-W dikes cut the zone and disrupt the continuity of mineralization. Overburden depth varies from none to 30-ft-thick. The intensity of surficial oxidation is controlled by the density of both high- and low-angle fracture zones and lithology. As a result the redox front forms a complex irregular interface that varies from 15 ft to as deep as 450 ft deep. It is estimated that 76 percent of the defined resources has undergone at least 50 percent oxidation. These relationships are summarized in section, 12,600 N (Figure 7-5) and section 11,500 E (Figure 7-6), which show the general geology and potential ore-grade mineralization at a cutoff grade of 0.01 ozAu/t. The locations of section 12,600 N and 11,500 E are shown in Figure 7-4.
 
7.4.2 39A Zone
 
The 39A zone is currently defined by 104 RC holes and 4 diamond core holes, totaling about 54,415 ft. In 2009 the 39A Zone was estimated to contain 38.9 Mt (sulfide) averaging 0.0228 ozAu/t and containing about 887,962 ounces of gold, using a 0.0106 ozAu/t cutoff grade. Using a 0.01 ozAu/t cutoff grade and a minimum of 20 ft thickness, the 39A mineralization forms a stratiform body roughly 1,500-ft-long in the principal north-northeast direction and 900-ft-long in the secondary west-northwest direction. Along these principal directions, mineralization averages about 129-ft­thick and 400-ft-wide. In the northeasterly direction, the zone plunges about 160 to the north. In the west-northwest direction, the zone plunges from 21-340 to the southeast. Depth to the top of mineralization varies from 300 ft at the south end of the zone to 605 ft at the extreme north end. Section D-D’ (Figure 7-7) through the 39A Zone shows the general geology and distribution of potential ore-grade mineralization at a cutoff grade 0.015 ozAu/t. The location of section D-D’ is shown in Figure 7-4.
 
 
 
Coral Gold Resources Ltd. 7-8 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
 
The 39A Zone is characterized by a broadly and strongly developed zone of retrograde alteration consisting of fine-grained dark-green actinolite + dark-green to black chlorite and accompanied by 5- 25 percent sulfides as disseminations and local replacement. Semi-massive sulfide replacement form narrow (5-ft to 25-ft-thick), persistent layers that extend along strike up to 250 ft. The highest gold values are generally encountered at or near the base of these sulfide layers. Major ore controls are exerted by the intersection of NNE and WNW striking high-angle structural zones with a low-angle fracture system which are represented by the overall shape of the mineralized zone and distribution of higher gold grades. 39A mineralization is cut by a set of E-W-striking, sericite-altered post-mineral feldspar porphyry dikes that dip moderately to the south. These dikes disrupt continuity of mineralization in the southern part of the 39A Zone.
 
7.4.3 Gold Pan Zone
 
Gold mineralization in the Gold Pan Zone is confined to a series of high- and low-angle faults forming a number of narrow tabular to lenticular zones oriented generally to the northwest. Based on a gold cutoff grade of 0.01 ozAu/t, the zone is roughly 1,500-ft-long in an east-west direction, 500-ft­wide and at least 200-ft-thick. The depth to mineralization within the zone ranges from 10 ft to 200 ft. The Gold Pan resource is defined by approximately 135 RC holes spaced 100 ft or less apart and 7 diamond core holes. At least 90 percent of the holes were drilled vertical with an average depth of less than 300 ft.
 
The west half of the Gold Pan Zone resource is hosted mainly by a sequence biotite hornfels, quartz hornfels and locally abundant retrograde skarn replacing greenstone, whereas the eastern half is hosted largely by quartz, lesser biotite hornfels and abundant granodiorite sills extending from the north contact of the Tenabo granodiorite. Higher grades (> 0.05 ozAu/t) form a series en echelon shoots and veins aligned in an east-west direction that reach 600-ft-long, 100-ft-wide and 50-ft-thick (Candee, 1996). The depth of oxidation varies from up to 200-ft-deep in the east half to 10-75 ft in the west. The redox front in the Gold Pan Zone is complex particularly in areas of strong retrograde skarn development.
 
In 2009, the Gold Pan inferred mineral resources was estimated to contain a total of 45.0 Mt (oxide + sulfide) averaging 0.0167 ozAu/t and containing about 752,211 ounces of gold using a 0.0106 ozAu/t cutoff grade. Included in this resource are 12.6 Mt of material classified as oxide, with an average grade of 0.02 ozAu/t.
 
7.4.4 Altenburg Hill Zone
 
The Altenburg Hill resource occurs along the southeast contact of the Tenabo granodiorite in highly fractured and folded hornfels and intrusive rocks (Figure 7-8). Gold appears confined to fracture zones and vein zones cutting biotitized and calc-silicate altered siltstone and sandstone (Candee, 1996). Mineralization is also hosted by dikes and sills of granodiorite porphyry. Less commonly, gold distribution is controlled by fractures and breccia bodies developed along minor fold axes. The highest grade gold mineralization is controlled by the intersection of series of NW- and NE-striking dike-filled high-angle fault and fracture zones. The Altenburg Hill Zone is cut by at least one sericite-altered, post-mineral feldspar porphyry dike that locally disrupts continuity of mineralization.
 
As defined by a gold cutoff grade of 0.01 ozAu/t, mineralization forms a coherent tabular zone that extends from just south of the top of the Altenburg Hill (5,440 ft) northeastward approximately 1,500 ft along the north flank of the hill to the northern extent of current drilling. The mineralized zone averages about 500 ft wide. Depth to the top of mineralization varies from outcropping ore-grade material to less than 100 ft and generally occurs within 30 ft of the surface. Mineralization extends as deep as 495 ft and individual zones reach up to 145-ft-thick. Surficial oxidation is strongly developed in the Altenburg Hill Zone reaching as deep as 450 ft and affecting approximately 88 percent of the identified resource. Locally the redox front forms a complex interface due to persistent but thin layers of unoxidized calc-silicate hornfels. Figure 7-8 is a typical cross section through the Altenburg Hill resource showing the distribution of gold grading > 0.01 ozAu/t. The location of section C-C’ is shown on Figure 7-4.
 
 
 
Coral Gold Resources Ltd. 7-9 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
The Altenburg Hill inferred mineral resource is defined by approximately 57 RC holes and 10 diamond drill holes. Twenty-five RC and 10 core holes were drilled by Coral between 2006 and 2010. The remaining 32 RC holes that define the resource were drilled by Amax in 1991 and 1996. Total footage is estimated at 22,000 ft.
 
In 2009, Beacon Hill estimated the total Altenburg Hill inferred mineral resource to be 14.6 Mt (oxide + sulfide) averaging 0.0151 ozAu/t and containing 219,510 ounces of gold. Of this total resource, 12.9 Mt averaging 0.0152 ozAu/t are considered oxide.
 
7.4.5 Distal Zone
 
Mineralization in the Distal Zone is hosted by a thick sequence (>100-ft-thick) of locally retrograde-altered biotite, quartz, calc-silicate hornfels and a thin yellow-brown skarnoid (?) layer. The highest grade gold is within or immediately adjacent to the possible skarnoid layer. These rocks are cut by at least one prominent high-angle fault that strikes NNW and dips steeply southwest. This fault may exert significant control on the distribution of ore-grade mineralization. The Distal Zone mineralization is structurally overlain by a succession of hornfelsed and retrograde-altered greenstone followed by a locally hornfelsed sequence of carbonaceous argillite, shale, chert, minor siltstone and very minor silty limestone. The favorable mineralized horizon in The Distal Zone appears to be in the same “stratigraphic” position as the mineralized horizon in the 39A Zones, but in a more distal position with respect to the Tenabo stock contact. This is reflected in the higher average arsenic values (2,427 ppm) and lower average copper values (337 ppm) in the Distal Zone versus lower average arsenic values (577 ppm) and higher copper values (757 ppm) in the 39A Zone.
 
As shown in Figures 7-9 and 7-10 the “distal target” is currently defined by 14 vertical and one inclined RC holes collared from 160 ft to 625 ft apart and totaling 20,140 ft. The location of sections A-A’ and B-B’ are shown in Figure 7-4. At present, these holes outline an apparently flat-lying mineralized zone at least 1,200-ft-long in a northerly direction, 500- ft-wide east-west and ranging from 55-ft- to 170-ft-thick with an average thickness of 109 ft at a 0.01 oz Au/t cutoff grade. Except where disrupted by faulting, the continuity of mineralization between holes appears good especially for the N-S trending higher grades zones. Near its margin the zone begins to rapidly break up into a series of narrow mineralized intervals ranging from 15 ft to 55 ft thick. Depth to the top of mineralization ranges from 800 ft to 995 ft. A summary of assay results at a 0.05 oz Au/t cutoff grade is compiled in Table 7.3.
 
 
 
Coral Gold Resources Ltd. 7-10 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
 
In 2009, the Distal Zone was estimated to contain an inferred mineral resource of 13.3 Mt averaging 0.0287 and containing about 383,010 ounces of gold using a 0.0106 ozAu/t cutoff grade.
 
7.5 HYDROTHERMAL ALTERATION
 
Hydrothermal alteration forms a broadly concentric halo surrounding the Tenabo stock and affecting certain rock units as far as 2,000 ft from the stock contact. Alteration patterns in the district are complex due to intense fracturing of the wall rocks, thin bedded nature and rapid compositional change that characterize the sedimentary sequence. Gold-related alteration consist of an early-stage intrusion-related potassic, a later “retrograde” skarn(?) stage and still younger quartz (silica)-sericite­(pyrite) and clay-chlorite-sulfide stages which appear to cut all earlier phases.
 
7.5.1 Potassic Alteration
 
Early potassic alteration is widespread and strongly developed in early phases of the intrusion, and is often spatially associated with gold mineralization, particularly in the Porphyry and Altenburg Hill Zones. In intrusive rocks, this alteration assemblage is characterized by widespread fine-grained secondary biotite replacing coarse-grained magmatic biotite, hornblende and pyroxene, and as veinlets accompanied by adularia (Honea, 1994). Fine secondary biotite also forms narrow envelopes surrounding quartz veinlets that cross-cutting early calc-silicate and biotite hornfels, and certain phases of the stock. In several localities, coarse-grained (> 5mm) adularia occurs as fracture fillings, accompanies quartz + calcite veins and as cement in several pebble dikes. Potassic alteration is generally associated with Au-Ag (Cu) mineralization having an overall Au to Ag ratio of about 1.5:1.
 
7.5.2 Retrograde Skarn(?)
 
Gold mineralization at Robertson is closely associated with moderately to strongly retrograde-altered quartz + calc-silicate and biotite hornfels. While not always obvious in deeply oxidized portions of mineralized zones both chlorite-actinolite and fine-grained quartz alteration form a strong fracture-controlled “stockwork” and local pervasive replacement of the biotite and calc-silicate hornfels. Locally, the chlorite-actinolite alteration is accompanied by semi-massive to massive sulfides (up to 50 percent) composed mainly of pyrrohotite, chalcopyrite, marcasite-pyrite, and arsenopyrite, which form 5-ft to 25-ft–thick semi-continuous replacement horizons and (or) open space fracture fillings. Gold grades exceeding 0.25 ozAu/t are sometimes, though not always, spatially associated with the strongest chlorite-actinolite-sulfide alteration. While the intensity of chlorite-actinolite alteration diminishes rapidly below the semi-massive sulfide layer, the highest gold grades are often encountered immediately beneath the sulfide replacement horizons and ore-grade gold values often persist well below the bottom of the chlorite-actinolite-sulfide alteration zone. This alteration is characterized by Au to Ag ratios of 1:<1.
 
7.5.3 Late Stage Quartz (Silica)-Sericite-(Pyrite)
 
The youngest (?) gold-related alteration consists of narrow envelopes of quartz (silica)-sericite­(pyrite) surrounding quartz-sulfide +calcite veins and zones of fine-grained “jasperoidal” silicification carrying Au-Ag, arsenopyrite, tetrahedrite - tennantite, stibnite, galena, sphalerite and chalcopyrite. The age of the Q-S-(Py) alteration and related mineralization is indicated from its relationship with a series of intensely Q-S-(py-mc)-altered, post-mineral dikes that cut proximal Au-Ag (Cu) skarn-type mineralization in the 39A and Porphyry Zones. Locally, Au-Ag, As-Sb + Hg, Cu + Pb + Zn veins cut and are hosted by the same post-skarn dikes.
 
 
 
Coral Gold Resources Ltd. 7-11 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
 
7.5.4 Chlorite-Clay
 
A late-stage, pale green chlorite + clay (montmorillonite ?), accompanied by coarse-grained euhedral pyrite-marcasite and arsenopyrite with minor galena, sphalerite and chalcopyrite, forms narrow replacement envelopes along fractures cutting hornfels and, less commonly, intrusive rocks. This alteration assemblage occasionally carries moderate to high-grade gold. The position of the chlorite-clay assemblage within the alteration sequence is currently equivocal.
 
7.6 GOLD DISTRIBUTION
 
A number of unpublished petrographic (both thin and polished sections) and SEM studies to determine the distribution, locations and close mineralogical associations of gold in the various resource areas were conducted by Russ Honea from 1993 through 1996. Result of those studies indicates that gold occurs mainly as native particles of generally high fineness that range in size from 2 to 200 microns and average about 40 microns. Where oxidized gold and rare native silver occur mainly as liberated grains that are closely associated with goethite. In the deeper 39A zone (unoxidized), native gold (88-92 % Au) is often associated with arsenopyrite, pyrrhotite and chalcopyrite. When present, very minor bismuth tellurides, including tetradymite, hedleyite and tellurobismuthite, are closely associated with gold and electrum (minor), which occur as irregular blebs on telluride grain margins.
 
Locally, gold is encapsulated in fine silicate gangue and occurs as small grains hosted by pyrrhotite, arsenopyrite and loellingite. A summary of major and trace minerals identified during the various petrographic and SEM examinations are presented in Table 7.1. Samples used for these studies include metallurgical pan concentrates, selected intervals of RC cuttings and diamond drill core.
 
Table 7.1: Summary of Minerals Identified at the Robertson Property
 
native gold
native silver
electrum
pyrite
pyrrhotite
marcasite
arsenopyrite
stibnite
chalcopyrite
sphalerite
galena
bournonite
acanthite
loellingite
gersdorffite
tetradymite
petzite
hessite
hedleyite
tellurobismuthite
altaite
tetrahedrite
bornite
chalcocite
covellite
digenite
native copper
cuprite
chysocolla
azurite
goethite
magnetite
hematite
illmenite
scorodite

7.7 COPPER DISTRIBUTION
 
Copper mineralization is widespread and locally reaches economically significant concentrations on the Robertson Property. Copper is closely associated with ore-grade gold and is best developed in the Porphyry Zone, where Cu occurs mainly as secondary sulfides replacing chalcopyrite and pyrite, and as lesser oxides. Within selected five-foot assay intervals containing ore-grade gold (>0.01 ozAu/t), copper values range from < 0.001 percent to over 9.5 percent, but averages less than 0.02 percent Cu. A tabulation of significant copper intercepts in the Porphyry Zone are presented in Table 7.2. The weighted average grade from this tabulation is 0.29 % Cu, over an average thickness of about 96 feet.
 
 
 
Coral Gold Resources Ltd. 7-12 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
In the 39A Zone, copper occurs primarily as discrete grains of chalcopyrite closely associated with pyrrohotite, pyrite-marcasite, and less commonly with arsenopyrite. Within selected 20 ft composite assay intervals containing ore-grade gold (>0.015 ozAu/t), copper values range from 0.009 percent to 8.28 percent, but averages only about 0.03% Cu.
 
 
 
Coral Gold Resources Ltd. 7-13 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
 
Table 7.2: Summary of Significant Copper Intercepts in the Porphyry Zone*
 
Hole No.
Type
From (ft)
To (ft)
Thickness (ft)
Cu(%)
AT-123
RC
25
110
85
0.21
AT-150
RC
145
280
135
0.29
AT-151
RC
20
85
65
0.21
AT-167
RC
330
375
45
0.2
   
395
465
70
0.28
AT-168
RC
320
465
145
0.22
AT-170
RC
215
400
185
0.15
   
430
495
65
0.25
AT-171
RC
75
180
105
0.14
   
205
290
85
0.2
   
310
485
175
0.22
AT-174
RC
380
430
50
0.3
AT-187
RC
40
185
145
0.48
   
215
250
35
0.25
AT-188
RC
175
265
90
0.14
   
365
405
70
0.25
AT-190
RC
360
440
80
0.26
AT-191
RC
100
105
105
0.19
AT-198
RC
165
225
60
0.34
AT-199
RC
70
225
155
0.22
AT-209
RC
40
105
65
0.24
AT-211
RC
30
100
70
0.21
CAT-18
CORE
130
295
165
0.28
CAT-21
CORE
45
200
155
0.31
   
230
275
45
0.25
CAT-22
CORE
95
155
60
0.21
   
175
285
110
0.38
CAT-23
CORE
110
210
100
0.3
CAT-24
CORE
40
75
35
0.59
CAT-27
CORE
255
320
65
0.36
CAT-30
CORE
70
145
75
0.19
CAT-33
CORE
375
460
85
0.28
CAT-36
CORE
175
235
60
0.28
   
255
325
70
0.7
   
355
390
45
0.17
   
410
480
70
0.22
CAT-37
CORE
115
250
135
0.18
   
295
500(EOH)
205
0.64
CAT-40
CORE
110
175
65
0.12
   
230
435
205
0.31
CAT-47
CORE
260
350
90
0.29
CAT-48
CORE
165
280
115
0.14
CAT-52
CORE
440
575
135
0.19
CAT-54
CORE
145
220
75
0.22
CAT-55
CORE
385
450
65
0.19
CAT-57
CORE
15
115
100
0.77

*Interval average grade calculated using 0.10% Cu cutoff.
 
 
 
Coral Gold Resources Ltd. 7-14 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 

Table 7.3: Summary of Distal Zone assay results using a 0.05 ozAu/t cutoff.
 
     
Collar
Hole
     
Au
Hole No.
UTM
East
UTM
North
Elev. (ft)
Length
(ft)
From
(ft)
To
(ft)
Thickness (ft)
Grade
oz/t
CR05-1
525449
4462671
5741
1200
945
995
50
0.163
including
       
950
975
25
0.262
CR05-2
525375
4462734
5733
1200
855
865
10
0.105
including
       
905
940
35
0.128
         
915
920
5
0.439
CR06-16
525347
4462618
5744
1200
905
985
80
0.085
including
       
960
965
5
0.241
         
990
1045
55
0.113
including
       
1030
1035
5
0.295
CR06-17
525414
4462735
5739
1200
950
960
10
0.118
         
1010
1020
10
0.057
CR06-18
525335
4462748
5780
1200
890
955
65
0.120
including
       
890
895
5
0.333
including
       
925
930
5
0.420
         
1010
1045
35
0.120
CR06-19
525366
4462803
5800
1200
 
no significant values
 
CR06-20
525369
4462851
5794
1500
1005
1015
10
0.123
         
1070
1090
20
0.164
CR08-1e
525324
4462896
5814
1120
930
940
10
0.0565
CR08-2
not drilled
             
CR08-3
525299
4462769
5849
1200
1005
1010
5
0.127
CR08-4
525307
4462716
5821
1200
955
970
15
0.128
CR08-5
525314
4462659
5795
1200
860
870
10
0.054
         
885
890
5
0.270
CR08-6
525378
4462595
5728
1200
910
920
10
0.354
         
965
1000
35
0.084
         
1015
1030
15
0.086
AT-3
525401
4462678
5678
2920
845
890
45
0.083
including
       
885
890
5
0.235
99406
525401
4462602
5680
1100
800
810
10
0.624 1
         
900
910
10
0.061
         
940
950
10
0.116
99445 2
525230
4462912
5890
1500
1080
1090
10
0.222
Total
     
20140
       

(1) Average of two assays.
(2) Inclined hole drilled at -70° on an azimuth of 144°.
 
 
 
Coral Gold Resources Ltd. 7-15 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
 
Figure 7-4: Resource Map
 
 
 
Coral Gold Resources Ltd. 7-16 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 

Figure 7-5: Porphyry Zone Section 12,600N Looking North
 
 
 
 
Coral Gold Resources Ltd. 7-17 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Figure 7-6: Porphyry Zone Section 11,500E Looking West
 
 
 
Coral Gold Resources Ltd. 7-18 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
 
Figure 7-7: 39A Zone Geology section D-D1 Looking West.
 
 
 
Coral Gold Resources Ltd. 7-19 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
 
Figure 7-8: Typical cross section C-C’ looking northeast through Altenburg Hill inferred mineral resource.
 
 
 
Coral Gold Resources Ltd. 7-20 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
 
Figure 7-9: Cross section A-A’ through Distal Zone mineral resource. Section looking east
 
 
 
Coral Gold Resources Ltd. 7-21 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
 
Figure 7-10: Cross section B-B’ through Distal Zone inferred mineral resource. Section looking north.

 
 
 
Coral Gold Resources Ltd. 7-22 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
SECTION 8.0 DEPOSIT TYPES
 
8.1 EXPLORATION TARGET CONCEPT
 
Economic gold mineralization at Robertson is both spatially and temporally associated with the Eocene-age Tenabo granodiorite. Gold mineralization in the Porphyry Zone occurs at the contact between a locally potassic-altered, fine-grained phase of the Tenabo granodiorite and calc-silicate hornfels and skarnoid units in the Elder Sandstone. These relationships suggest that this mineralization represents a proximal Au-Ag (Cu) skarn system as defined by Orris, et al. (1987) and Ray, et al. (1990). Gold in the Altenburg Hill and Gold Pan zones occur in a similar proximal position in biotite and calc-silicate hornfels at the faulted (?) contact of the granodiorite stock, related dikes, sills, and irregular diorite endoskarn bodies (Candee, 1996). The higher-grade 39A Zone is strongly controlled by intersecting high-angle fault zones developed in a highly fractured layered sequence of retrograde-altered biotite, calc-silicate hornfels and skarnoid. The deposit is developed 800 ft to 1,000 ft from the contact of the granodiorite stock and shares many mineralogical and geochemical characteristics of “distal” gold skarn, as defined by Ray et al., (1990).
 
The “Distal” Zone consists of a series of persistent, but narrow flat-lying mineralized zones, situated well outside the thermal metamorphic aureole of the stock that are postulated to represent a more distal position of the Tenabo Au-Ag (Cu) hornfels/skarn system. This mineralization is hosted locally by biotite, quartz, calc-silicate hornfels and skarnoid which developed in layered sequences of silty carbonaceous shale, siltstone and very minor silty limestone. Along with the lack of hornfels at the surface or the presences of intrusive rocks at depth, the highest grade gold mineralization is closely associated with an 80-ft-thick sequence of quartz and calc-silicate hornfels and a distinctive fine-grained yellow-brown skarnoid layer. Mineralization is often accompanied by weak retrograde actinolite-tremolite-chlorite alteration along with very strong enrichment in arsenic.
 
Also outside the metamorphic aureole are a series of locally mineralized, NNW-striking moderate to high-angle faults marked by discontinuous 5-ft- to +50-ft-thick, weakly to moderately silicified breccia zones in argillite, shale and chert. Surface rock chip sampling and RC drilling of these breccia outcrops have returned significant ore grade values. Many of the anomalous gold values from outcrop sampling have not been followed up and at least three ore-grade gold drill intercepts remain open along strike and down dip.
 
High-grade, east-west striking (?), quartz-sulfide + calcite veins and (or) silicified zones with strong quartz (silica)-sericite-(pyrite) alteration envelopes, have been defined in the Gold Pan Zone and include a number of veins in the Phoenix and Silver Safe mines. The highest grades (+0.5 ozAu/t) occur at intersections with NW-striking faults and fracture zones. These veins and silicified structural zones carry significant values in Au-Ag, As-Sb + Hg, Cu-Pb-Zn.
 
Deep drilling at Robertson in 2007 intersected Carlin-type (C-T) mineralization in hole TV07-2 hosted by variably altered limestone in the lower plate of the RMT. The gold values and trace element geochemistry returned in this hole, along with its geologic setting, host rock composition and hydrothermal alteration, meet the criteria for sediment hosted C-T mineralization as defined by Teal and Jackson (1997). These criteria include the following features:
 
·  
Single to multiple dike-filled faults, locally mineralized and showing evidence of protracted episodic movement.
·  
Multiple intrusive events (Cretaceous-Late Eocene).
·  
Significant gold mineralization in the district (>1million ounces of gold).
·  
Major NNW- to NW-trending fault zones with intersecting NE-trending faults.
·  
Map-scale anticlinal folds in lower plate carbonate rocks.
·  
Evidence that faults acted as major fluid conduits (positive geochemistry).
·  
Favorable carbonate host strata in the lower plate.
 
 
 
Coral Gold Resources Ltd. 8-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
8.2 GEOLOGICAL MODEL FOR THE ROBERTSON PROPERTY
 
Gold mineralization within the Tenabo intrusive complex exhibits characteristics of an Au-Ag (Cu) hornfels/skarn system. Near-term exploration at Robertson will focus on expanding currently defined low-grade near surface resources (Porphyry, Altenburg Hill and Gold Pan Zones) and assess their potential to be brought into production. Longer term, the deeper resources (39A and Distal Zones) will be further evaluated for their potential to contribute to future production. Additional continued exploration for high-grade C-T Au mineralization hosted by favorable lower plate rocks should also be continued.
 
The geological setting for these deposit-types includes:
 
·  
structural intersections of high-and low-angle faults,
·  
replacement of relatively favorable lithologies for development of skarn,
·  
late-stage quartz-sulfide + calcite “gash” veins within a strike-slip fault environment,
·  
proximity to the tenabo stock for proximal and distal au-ag (cu) hornfels/skarn,
·  
Igneous dike-filled faults.
·  
Deep high-grade Carlin-type mineralization hosted in lower plate carbonate rocks.
 
The Robertson Au-Ag (Cu) hornfels/skarn system contains a series of mineralized zones spatially associated with an intermediate-composition intrusive complex of late Eocene age. Gold occurs in highly fractured, fine-grained siliciclastic sedimentary and lesser volcanic rocks at or near contacts with intrusive rocks. Major fault zones controlled not only emplacement of the Tenabo stock and later dike swarms, but also provided pathways as well as sites of deposition for Au-Ag (Cu) mineralization. In northern Nevada, a number of Au-Ag (Cu) skarn systems have become significant producing gold mines and several identified mineral resources remain unexploited. Examples of deposits with similar geologic settings include McCoy/Cove mine, Phoenix Project (Battle Mountain district), Buffalo Valley mine and Redline prospect, all of which are on the Battle Mountain-Eureka trend.
 
At Robertson local Au-As-Hg + Sb anomalies, thought to represent leakage of potential Carlin-type mineralization, occur in upper plate rocks outside or near the edge of Ag-base metal zones located southwest and north-northwest of the Tenabo stock (Figure 7-1). Similar relationships are described at Cove/McCoy where Au-Ag base metal retrograde skarn occurs at or near contacts with the Eocene age Brown stock, with fracture controlled sediment hosted Ag-Au base metal mineralization in a distal position and “true” Carlin-type mineralization located at the outer margin of the Ag-base metal mineralization (Johnston, 2000). Also, the close spatial and partly cross cutting relationship of a Carlin-type gold system in the East and West Archimedes deposits with Ag-base metal mineralization at Eureka, Nevada (Dilles et al., 1996), suggests a genetic association between the two assemblages that may also exist at Robertson.
 
 
 
Coral Gold Resources Ltd. 8-2 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
SECTION 9.0 EXPLORATION 9.1 PRE-CORAL EXPLORATION ACTIVITY
 
The most important modern exploration activity prior to Coral’s involvement in the property are those of Superior Oil (1968-70) and E & B Exploration (1980-81). The intersections of high-grade gold in holes T 29 (20 ft/1.154 ozAu/t) and T 83 (10 ft/0.525 ozAu/t), near the Gold Pan mine by Superior, along with at least six +100-ft-thick drill intercepts of lower grade mineralization, were the first indications that real potential for open-pit-mineable gold existed on the property. E & B Exploration advanced the property by undertaking the first district-wide mapping and sampling programs which succeeded in identifying a number of high priority gold anomalies. More importantly, they followed up the Superior drilling results in the Gold Pan Zone and provided a basis for defining a resource in that area.
 
9.2 CORAL GOLD EXPLORATION ACTIVITIES (1986-1989)
 
Exploration of the district by Coral during the period 1986-89, focused mainly on developing a resource base from which a mineable reserve could be defined. As a result, much of their activity was confined to drilling the known resource areas at Gold Pan, Gold Quartz and Gold Quartz Extension (West). At this time Coral also contracted two geophysical surveys (Barringer, 1987 and E-Scan, 1988) and an extensive geochemical orientation study (Barringer, 1987). None of these studies provided significant encouragement. During 1988, Coral decided to place the Gold Quartz West and poorly defined Gylding zones into production. But overly optimistic and aggressive resource estimates, and poor geological understanding resulted in less than expected head grades and poor heap leach recoveries. This ultimately led to the decision to halt mining less than a year later. In 1989, Coral focused its exploration in the upper Triplet Gulch area, where several widely scattered drill intercepts provided some encouragement. However, additional drilling has failed to define even a modest resource in this area.
 
9.3 AMAX GOLD ACTIVITIES (1990-1996)
 
From 1990, until they withdrew from the agreement, Amax completed a district-wide exploration program that included drilling of over 176,000 ft of combined RC and diamond core, detailed geological and geochemical reconnaissance of the entire claim block (including the Excluded Claims), rock chip and mine dump sampling, detailed geological mapping and site-specific geophysics. During that time period, Amax identified the 39A, Porphyry, and Altenburg Hill Zones and continued to define the previously identified Gold Pan Zone. As a result of the detailed reconnaissance stream sediment and follow-up rock chip sampling programs, a series of strong gold anomalies were identified within the claim block, but outside the main district. In 1999, Cortez drill-tested one of the Amax anomalies that was outlined on the Lander Ranch claims.
 
9.3.1 39A Zone
 
Beginning in 1990, Amax drilled three “deep” RC holes totaling about 9,340 ft to test the concept that potential high-grade gold mineralized hosted by lower plate carbonate rocks existed at depth in the Tenabo district. All of the holes failed to reach the lower plate, but did provide substantial encouragement for near surface gold resources. These holes ultimately led to discovery of the higher grade 39A Zone near the west end of the district. As constrained by a 0.01 ozAu/t cutoff grade, the 39A Zone is currently defined by 104 RC and 4 core holes, totaling about 54,415 ft, including 13 RC holes drilled by Cortez in 1999 and 58 RC holes drilled by Coral Gold Resources in 2004-2008.
 
 
 
Coral Gold Resources Ltd. 9-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Table 9.1 is a compilation of significant gold intercepts from holes drilled in the 39A Zone, using a 0.01 ozAu/t cutoff grade and a 20 ft minimum thickness.
 
9.3.2 Porphyry Zone
 
Sampling a series of small bedrock exposures at the east end of the district in areas disturbed by historic placer mining, returned ore-grade results from highly fractured outcrops of potassic-altered, fine-grained diorite. Follow-up RC drilling encountered several +150-ft-thick intervals of low-grade Au mineralization beginning at the bedrock surface. Later, after a series of wide spaced RC holes, it was determined that a potentially large, shallow, low-grade oxidized resource was present. This led to grid drilling on approximately 120-ft-centers with 147, mostly vertical RC holes and 50 core holes, for a combined total of about 80,000 ft of drilling. The drilling defined a proven + probable mineral reserve estimated to contain 13,556,125 short tons of ore at a grade of 0.019 ozAu/t and containing about 255,000 ounces of gold (Amax, 1994). The presentation of data form this historic mineral reserve is intended to provide context for the Amax exploration activities and should not be construed as representing a current mineable reserve. A compilation of significant gold intercepts from holes drilled in the Porphyry Zone are presented in Table 9.2.
 
9.3.3 Altenburg Hill Zone
 
As a result of ore-grade gold values returned from several surface rock chip samples on Altenburg Hill and significant gold in follow-up grid soil sampling, a series of 15 shallow, vertical and inclined RC holes were drilled in 1993 by Amax. Results of this drilling suggested potential for shallow, structurally controlled, low-grade mineralized zone. In 1996, these intercepts were followed up by grid drilling on approximately 100-ft-centers with 38 vertical RC holes and one core hole, totaling 9,485 ft. The drilling defined an indicated resource of 3,500,000 short tons of mineralized material with an average grade of 0.018 ozAu/t, using a 0.01 ozAu/t cutoff grade (Candee, 1996). The presentation of data form this historic mineral resource estimate is intended to provide context for the Amax exploration activities and should not be construed as representing a current mineable reserve.
 
 
 
Coral Gold Resources Ltd. 9-2 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Table 9.1: Summary of significant gold intercepts in the 39A Zone*.
 
     
Collar
     
Au Grade
Hole No.
UTM
East
UTM North
Elev. (ft)
From
(ft)
To (ft)
Thickness
(ft)
oz/t
AT-39A
525788
4462299
5506
670
765
95
0.134
AT-40
525815
4462279
5494
665
780
115
0.088
AT-44
525768
4462278
5505
575
730
155
0.047
AT-45
525757
4462320
5523
580
770
190
0.101
AT-49
525720
4462294
5512
500
700
200
0.124
AT-51
525726
4462359
5542
570
710
140
0.105
AT-56
525683
4462328
5529
505
635
130
0.084
AT-57
525673
4462288
5539
470
705
245
0.088
AT-58
525652
4462252
5545
350
485
135
0.056
AT-64
525646
4462184
5509
340
445
105
0.116
AT-65
525679
4462213
5507
420
455
35
0.072
       
480
584
105
0.042
AT-68
525767
4462390
5516
570
730
160
0.054
CR04-8
525760
4462347
5523
600
735
135
0.074
CR04-12
525624
4462176
5515
295
375
80
0.063
CR04-15
525752
4462291
5513
540
575
35
0.078
       
600
760
160
0.113
CR04-16
525734
4462268
5507
545
690
145
0.093
CR04-17
525698
4462309
5525
510
710
200
0.118
CR04-18
525847
4462258
5477
600
615
15
0.154
       
745
845
100
0.074
CR05-3
525657
4462173
5505
385
450
65
0.089
CR05-8
525796
4462540
5582
480
540
60
0.039
       
785
855
70
0.073
CR06-2
525712
4462226
5506
550
595
45
0.185
CR06-4
525700
4462276
5520
515
675
160
0.057
CR06-5
525792
4462258
5491
680
755
75
0.102
CR06-8
525783
4462381
5515
615
740
125
0.084
CR06-14
525821
4462500
5564
565
630
70
0.067
CR08-13
525808
4462404
5509
680
780
100
0.074
CR08-17
525868
4462447
5523
820
910
90
0.057
99413
525608
4462168
5514
300
380
80
0.163
CAT-5
525672
4462289
5538
470
595
125
0.112
CAT-6
525753
4462318
5524
620
770
150
0.163
CAT-58
525723
4462296
5516
495
700
205
0.059
CAT-59
525722
4462332
5536
530
585
55
0.059
       
600
755
155
0.149
 
*Calculated using a 0.01 oz A/t cutoff grade.
 
 
 
Coral Gold Resources Ltd. 9-3 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
9.3.4 Gold Pan Zone
 
Also in 1996, Amax drilled 25 RC holes in the previously identified and partly defined Gold Pan Zone resource area. The drilling was designed to provide further detail on the distribution and continuity of high-grade mineralization, as well as close off possible extensions to mineralization along the northwest edge of the zone. Upon completion of this program an indicated resource of 8,300,000 short tons of mineralized material with an average grade of 0.024 ozAu/t, using 0.01 ozAu/t cutoff grade, was estimated by Amax to be present in the Gold Pan Zone (Candee, 1996).
 
Table 9.2: Summary of significant gold intercepts in the Porphyry Zone*.
Hole No.
Type
From (ft)
To (ft)
Thickness (ft)
Grade ozAu/t
AT-72
RC
225
325
100
0.039
AT-123
RC
30
85
55
0.05
AT-150
RC
150
250
100
0.054
AT-151
RC
30
85
50
0.054
AT-165
RC
60
140
80
0.049
AT-167
RC
200
465
265
0.025
AT-171
RC
55
120
65
0.051
AT-187
RC
20
165
145
0.032
AT-188
RC
175
300
125
0.043
   
365
405
40
0.035
AT-190
RC
360
450
90
0.068
AT-191
RC
100
130
30
0.155
   
175
250
75
0.052
AT-195
RC
55
130
75
0.029
AT-199
RC
85
175
90
0.041
AT-209
RC
70
125
55
0.037
   
175
210
35
0.052
AT-211
RC
25
70
45***
0.082
CAT-10
CORE
20
100
80
0.044
CAT-12
CORE
215
320
105
0.035
CAT-21
CORE
15
110
95
0.053
CAT-22
CORE
95
155
60
0.039
CAT-23
CORE
105
175
70
0.045
CAT-24
CORE
20
90
70
0.035
CAT-30
CORE
90
135
45
0.054
CAT-33
CORE
290
460
170
0.037
CAT-37
CORE
280
490
210
0.072
CAT-44
CORE
215
355
140
0.09
CAT-47
CORE
155
215
60
0.037
   
250
345
95
0.127
CAT-49
CORE
270
410
140
0.036
CAT-52
CORE
210
285
75***
0.026
   
360
480
120
0.067
CAT-54
CORE
140
215
75***
0.038
CAT-55
CORE
345
440
95
0.049
CAT-57
CORE
30
110
80
0.172
 
*Average grade calculated using 0.02 ozAu/t cutoff.
**Interval thickness from near vertical drill holes. ***Interval thickness from angle hole.
 
 
 
Coral Gold Resources Ltd. 9-4 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
9.4 CORTEZ ACTIVITIES (1999)
 
In 1999, Cortez completed a 56,000 ft RC drilling program comprised of 47 holes that focused on extending the 39A mineralization, following up gold-anomalous surface samples mainly in upper Mill Gulch with a series of shallow trenching and testing a series of NW trending structures in upper Triplet Gulch (Hebert, 1999). Additionally, Cortez completed a grid enzyme leach survey over the pediment gravel east of Altenburg Hill, which was followed up by drilling a single 3,000-ft-deep mud rotary hole. A series of four RC holes were drilled in the vicinity of AT-3 to test a mineralized zones thought to represent a distal position of the porphyry system. Finally, single 1,500-ft-deep RC hole was drilled on the Lander Ranch claims, located about one mile north of the main district, to test a group of strong gold-anomalous surface samples taken from a moderately silicified fault breccia.
 
In the 39A Zone, Cortez focused 13 RC holes along an apparent NE-SW trend of mineralization testing for possible extensions of the zone. Only three of the holes encountered significant mineralization, but they failed to substantially expand the zone.
 
Four step-out holes were drilled by Cortez in the vicinity of AT-3, providing additional evidence that distal hornfels-skarnoid mineralization, hosted by a thick sequence of fine-grained siliciclastic rocks and forming a broad zone up to 800 ft in a NNW direction and 350 ft to the northeast.
 
A single 1,500-ft-deep RC hole was completed in the vicinity of a mineralized fault zone on the Lander Ranch claim block, which encountered significant gold values in two intervals from deep in the hole. These intersections suggest that ore-grade mineralization encountered in this drill hole at 1,100 ft may extend to the surface where ore-grade samples have been taken.
 
The deep mud-rotary-drill hole (99432) collared on an enzyme-leach-generated anomaly in the pediment east of Altenburg Hill, failed to cut any significant gold values and remained in siliceous upper plate rocks. The hole is located very close to the sites of USGS drill holes No. 2 and 3, diamond core holes that reached over 2,000-ft- and 1,250-ft-deep, respectively (Wrucke, 1974). Except for hole No. 3, which end in granodiorite of the Tenabo stock, these holes also encountered thick intervals of siliceous upper plate rocks.
 
9.5 CORAL GOLD RESOURCES ACTIVITIES (2004-2006)
 
During 2004 and 2005, Coral conducted three drilling programs consisting of 32 RC holes totaling 24,020 ft on the Robertson Property. The focus of this exploration was to expand and further define the 39A Zone, test the “deep” Gold Pan Zone for extensions of the 39A Zone and offset previous ore-grade intersections in the “distal target area”. Results of the 2004-2005 drilling programs succeeded in increasing the contained ounces in the 39A Zone by expanding the area of higher-grade gold within the defined resource area and by modestly expanding the resource to the north and east. A total of 22 holes were directed at expanding and testing continuity of the 39A Zone.
 
In 2006, Coral completed 48 RC holes totaling 35,615 ft on the Robertson Property. This drilling program focused on expanding and defining the 39A, Altenburg Hill and Porphyry Zone mineral resources, and offset drilling of the emerging Distal Zone.
 
A summary of Coral’s 2004-2006 drilling programs were previously reported in the NI 43-101 compliant technical report Mineral Resource Estimate for the Robertson Property, Lander County, Nevada, USA (Stokes et al., 2008) available on SEDAR.
 
 
 
Coral Gold Resources Ltd. 9-5 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Also during 2006, Coral completed a program designed to evaluate the potential of its Robertson Property to host deep CT-type gold deposits in favorable carbonate rocks in the lower plate of the RMT. The program consisted of geological mapping, 100 m x 100 m grid soil sampling (1,032 samples), collecting about 196 rock chip/dump samples and conducting a detailed gravity survey (300 stations/400m spacing).
 
The 2006 soil samples were submitted to ALS Chemex for sample prep and multi-element analysis. All samples were dry screened to +80 mesh-10 mesh. The -80 mesh and +10 mesh fractions were discarded. The samples were then pulverized to approximately 80 % passing -80 mesh and analyzed for Au by FA/AA, using a one-assay ton charge, and multi-element analyses using a combination of ICP-MS (inductive coupled plasma with mass spectroscopy) and ICP-AES (inductively coupled plasma with atomic emission spectroscopy) using a 5 g sample and aqua-regia digestion. The gold determination using FA/AA has a lower limit of detection (LLD) =5 ppb. The multi-element (61 elements) analysis using a combination ICP-MS and ICP-AES included Ag (LLD=0.01 ppm), As (LLD=0.2 ppm), Sb (LLD=0.05 ppm), Hg (LLD=0.01 ppm), Tl (LLD=0.02 ppm), Ba (LLD=10), Bi (LLD=0.01 ppm), Se (LLD=1 ppm), Cu (LLD=0.2 ppm), Mo (0.05 ppm), Pb (LLD=0.2 ppm), and Zn (LLD=2 ppm).
 
In 2006, Coral collected 196 rock chip and mine dump samples from the area of the recently acquired View claims and from the NW part of the Robertson property. Samples were analyzed by ALS Chemex for Au by FA/AA with a lower limit of detection (LLD) of 5 ppb. Multi-element determinations were made using a combination of inductively coupled plasma with mass spectroscopy and atomic emission spectroscopy for 61 elements including Ag (LLD=0.01 ppm), As (LLD=0.2 ppm), Sb (LLD=0.05 ppm), Hg (LLD=0.01 ppm), Tl (LLD=0.02 ppm), Ba (LLD=10), Bi (LLD=0.01 ppm), Se (LLD=1 ppm), Cu (LLD=0.2 ppm), Mo (0.05 ppm), Pb (LLD=0.2 ppm), and Zn (LLD=2 ppm).
 
Coral completed a detailed gravity survey during 2006 that covered all of the Robertson property as well as adjacent portions of the Excluded claims and claims owned by Cortez (with their permission). The survey was planned, supervised and the data interpreted by Bob Ellis, a consulting geophysicists. The acquisition and processing of the gravity data was completed by Magee Geophysical Services using state-of the-art gravity meters with high-accuracy GPS units to determine UTM coordinates and altitude of gravity stations. Gravity measurements were taken at approximately 300 stations spaced roughly 400 meters apart. In addition, Coral acquired detailed gravity data for the adjacent Lander Ranch and Blue Nugget claims as well as compiling all public domain gravity data
 
Result of these studies defined at least two target areas: The NNW-striking high-angle Try and Tomcat fault zones. Both are strongly developed structural zones that reach >5,000 ft along strike and up to 1,000 ft wide and show evidence of recurrent movement over a long time period. Certain fault segments are filled by multiple igneous dikes and contain local zones of strong silica-clay alteration that carry gold values up to 6.06 ppm and arsenic values >10,000 ppm. These structural zones are further defined by coincident linear gravity and magnetic features interpreted to represent deep expressions of the faults mapped at surface. Evidence that these structural zones served as important conduits for the transport of gold is provided by soil and rock geochemistry which define a series of strong gold-arsenic and silver-base metal anomalies that coincide precisely with the areal extent of the mapped faults zones and geophysical linear features (McCusker, 2007).
 
 
 
Coral Gold Resources Ltd. 9-6 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
SECTION 10.0 DRILLING 10.1 CORAL DRILLING (2007)
 
Because of various permitting delays in 2007, Coral was unable to drilling targets in the “Core” area of the Robertson Property. Instead, Coral drilled two vertical flooded reverse circulation holes that tested deep targets which were identified along the west side of Coral’s Robertson claim block during the 2006 evaluation. Holes TV07-1 and TV07-2 were drilled to depths of 2,990 ft and 3,450 ft, respectively. TV07-1 intersected a thick sequence of fine grained siliceous sedimentary and volcanic rocks followed by biotite and quartz hornfels equivalents in the upper plate of the RMT. Although the hole failed to reach the lower plate rocks, it did intersect a number of narrow low-grade zones. TV07-2 was collared along a dike-filled splay of the Try fault zone and intersected limey mudstone in the lower plate of the RMT starting at 3,080 ft. The hole returned a 200-ft-thick interval of weakly to strongly anomalous gold values ranging from 0.031 to 2.190 ppm gold, hosted by altered lower plate carbonates rocks (McCusker, 2008). A summary of significant assay results for the 2007 deep drilling are presented in Table 10.1.
 
Table 10.1: Summary of significant gold intercepts in TV07-1 and TV07-2.
Hole ID
From (ft)
To (ft)
Thickness (ft)
Au, oz/t Ag, oz/t
As, ppm
TV07-1
680
720
40
0.013
0.137
290
TV07-1
1640
1650
10
0.020
0.027
886
TV07-1
1740
1750
10
0.032
0.020
882
TV07-1
1930
2010
80
0.020
0.030
495
TV07-1
2460
2480
20
0.014
0.024
995
TV07-2
3080
3090
10
0.064
0.015
278
TV07-2
3120
3140
20
0.041
0.011
1560
TV07-2
3150
3160
10
0.010
0.003
333
TV07-2
3180
3200
20
0.008
0.003
344
 
10.2 CORAL DRILLING (2008)
 
During 2008, Coral completed 33 RC drill holes totaling 22,835 ft. Of the total drilling, 15 vertical holes were drilled on the north flank of Altenburg Hill mainly as infill and offset of the wide spaced 2006 drilling. Six holes were completed in the gravel-covered South Porphyry Zone, an extension to the Porphyry Zone, as follow up of the intercept in CR06-30 (140 ft/0.04 ozAu/t). The six vertical holes were offset up to 350 ft east and 420 ft north of CR06-30. Seven vertical holes were drilled in the 39A Zone to test the potential for expanding the current resource to the northeast and five vertical holes were completed in the Distal Zone to test for extensions north and west of the currently defined resource. Assay results for the 2008 drilling program are presented in Table 10.2.
 
10.2.1 Altenburg Hill Zone
 
The infill and offset drilling of the 2006 drilling in the Altenburg Hill Zone resulted in a modest expansion and increased confidence in the continuity of mineralization. The drilling also indicated that mineralization remains open for potential expansion northward and with limit expansion both to the east and west of the current resource. The most significant assay results were returned in holes CR08-21 (100 ft / 0.019 ozAu/t starting at surface), CR08-26 (130 ft/0.020 ozAu/t from 25 ft),
 
 
 
Coral Gold Resources Ltd. 10-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
CR08-30 (160 ft/0.023 ozAu/t from 5 ft) and CR08-31 (135 ft/0.018 ozAu/t from surface). These intervals were calculated using 0.01 ozAu/t cutoff grade.
 
10.2.2 South Porphyry
 
The results from offset drilling in the gravel-covered South Porphyry Zone indicate that mineralization diminishes rapidly to the east but is continuous to the north for at least 350 ft. Hole CR08-37 was collared 350 ft north of CR06-30 and intersected 135 ft averaging 0.020 ozAu/t from 135 ft, under 30 ft of gravel, and CR08-38 was located 125 ft north of CR06-30 and returned 50 ft averaging 0.039 ozAu/t from 160 ft, followed by 50 ft averaging 0.017. Mineralization in both holes is disrupted by a series of E-W striking post-mineral feldspar porphyry dikes.
 
10.2.3 39A Zone
 
Drilling in the 39A Zone resulted in a modest expansion to the northeast of CR06-8 (125 ft/0.084 ozAu/t from 615 ft). CR08-13 was collared 105 ft to the northeast and returned 100 ft/0.075 ozAu/t starting at 680 ft, CR08-17, collared 355 ft northeast intersected 90 ft/0.057 ozAu/t from 820 ft and CR08-16 located 560 ft northeast returned 130 ft/0.014 ozAu/t starting at 830 ft. These results, as well as other holes in this area, indicate that higher grade 39A mineralization is diminishing to the northeast but that lower grade gold values continue to define the zone.
 
10.2.4 Distal Zone
 
Drilling in the Distal Zone clearly identified the west edge of mineralization and a single hole CR08- 1 drilled north of the zone returned only scattered low-grade gold values suggesting that mineralization is diminishing in that direction. However, offsetting CR06-16 (110 ft/0.068 ozAu/t from 955 ft), the southern-most hole in the Distal Zone 125 ft to the southeast, intersected 120 ft averaging 0.071 ozAu/t from 910 ft, including 10 ft that average 0.354 ozAu/t, in CR08-6. Drilling results indicate potential for expanding the Distal Zone resource farther south.
 
 
 
Coral Gold Resources Ltd. 10-2 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Table 10.2: Summary of 2008 Drilling
 
ALTENBURG HILL
             
     
Collar
Total
     
Gold
Hole No.
UTM
north
UTM
east
elev.
(ft)
depth
(ft)
From
(ft)
To (ft)
Thickness
(ft)
Grade,
ozAu/t
CR08-10
4461369
527204
5265
500
95
170
75
0.014
CR08-19
4461311
527199
5293
500
40
115
75
0.027
         
175
235
65
0.018
         
265
280
15
0.071
CR08-20
4461399
527079
5278
500
35
65
30
0.010
         
165
185
20
0.012
         
210
230
20
0.037
CR08-21
4461421
527145
5259
500
0
100
100
0.019
         
130
200
70
0.017
         
270
305
35
0.017
         
320
370
50
0.017
CR08-22
4461341
527236
5264
500
   
no significant values
CR08-23
4461349
527273
5236
500
   
no significant values
CR08-24
4461380
527248
5244
500
30
75
45
0.012
         
360
380
20
0.024
CR08-25
4461428
527230
5209
500
60
150
90
0.019
         
375
415
40
0.013
CR08-26
4461463
527201
5204
500
25
155
130
0.020
         
290
315
25
0.018
CR08-27
4461475
527165
5209
500
0
15
15
0.013
         
50
125
75
0.018
         
200
265
65
0.021
         
370
385
15
0.047
CR08-28
4461385
527303
5192
500
405
495
90
0.013
CR08-29
4461446
527311
5172
500
60
140
80
0.021
         
435
450
15
0.034
CR08-30
4461477
527271
5172
425
5
165
160
0.023
         
280
345
65
0.012
         
365
385
20
0.024
         
405
425
20
0.030
CR08-31
4461503
527234
5195
500
0
135
135
0.018
         
330
365
35
0.018
         
440
455
15
0.031
CR08-32
4461541
527260
5186
345
0
85
85
0.014
         
305
320
15
0.023
Total
     
7270
       
 
 
 
 
Coral Gold Resources Ltd. 10-3 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
SOUTH PORPHYRY ZONE
           
     
Collar
Total
     
Gold
Hole No.
UTM
north
UTM
east
elev.
(ft)
Depth
(ft)
From
(ft)
To (ft)
Thickness
(ft)
Grade,
ozAu/t
CR08-33
4461648
527518
5127
500
95
110
15
0.025
CR08-34
4461655
527565
5143
500
   
no significant values
CR08-35
4461698
527511
5163
500
145
170
25
0.017
CR08-36
4461750
527530
5169
500
65
75
10
0.015
         
220
230
10
0.032
         
470
480
10
0.014
CR08-37
4461753
527479
5173
500
135
270
135
0.020
CR08-38
4461694
527458
5166
500
160
210
50
0.039
         
370
420
50
0.017
Total
     
3000
       
 
 
39A ZONE
               
Hole No.
UTM
north
UTM
east
Collar
elev.
(ft)
Total
depth
(ft)
From
(ft)
To (ft)
Thickness
(ft)
Grade,
ozAu/t
CR08-11
4462209
525782
5487
760
80
85
5
0.061
         
165
170
5
0.057
         
205
210
5
0.070
         
660
685
25
0.034
         
695
710
15
0.012
CR08-12
not drilled
             
CR08-13
4462406
525809
5504
850
680
780
100
0.075
including
       
690
770
80
0.088
including
       
710
735
25
0.170
CR08-14
4462501
525821
5517
1000
80
155
75
0.017
         
340
380
40
0.025
         
555
580
25
0.012
         
825
855
30
0.015
         
905
925
20
0.022
CR08-15
4462482
525864
5551
1000
80
100
20
0.021
         
385
395
10
0.064
         
600
610
10
0.046
         
835
900
65
0.037
         
965
990
25
0.027
CR08-16
4462504
525898
5527
1040
55
75
20
0.014
         
140
170
30
0.017
         
265
280
15
0.018
         
295
320
25
0.021
         
380
390
10
0.054
         
760
800
40
0.037
         
830
965
135
0.014
CR08-17
4462445
525868
5515
970
95
110
15
0.025
         
225
265
40
0.045
         
820
910
90
0.057
 
 
 
 
Coral Gold Resources Ltd. 10-4 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
including
       
820
830
10
0.327
CR08-18
4462472
525941
5487
1025
245
265
20
0.031
         
285
350
65
0.039
         
620
625
5
0.069
         
710
735
25
0.022
         
765
770
5
0.137
         
965
1025
60
0.019
Total Footage
   
6645
       
 
 
DISTAL ZONE
             
Hole No.
UTM
north
UTM
east
Collar
elev.
(ft)
Total
depth
(ft)
From
(ft)
To (ft)
Thickness
(ft)
Grade,
ozAu/t
CR08-1
4462897
525324
5804
1120
925
940
15
0.043
         
960
1000
40
0.013
CR08-2
not drilled
             
CR08-3
4462768
525301
5831
1200
680
730
50
0.027
         
940
955
15
0.014
         
980
1035
55
0.024
         
1050
1080
30
0.026
CR08-4
4462714
525307
5806
1200
430
480
50
0.011
         
705
720
15
0.021
         
860
885
25
0.023
         
910
945
35
0.015
         
955
980
25
0.089
         
1055
1085
30
0.018
CR08-5
4462659
525314
5791
1200
630
650
20
0.031
         
820
835
15
0.028
         
850
895
45
0.058
including
       
885
890
5
0.27
         
925
945
20
0.022
         
1080
1095
15
0.028
         
1165
1175
10
0.029
CR08-6
4462596
525378
5728
1200
890
900
10
0.032
         
910
1030
120
0.071
including
       
910
920
10
0.354
including
       
965
970
5
0.24
         
1045
1060
15
0.016
Total Footage
   
5920
       
 
Calculated using 0.010 ozAu/t cutoff grade.
 
10.3 CORAL DRILLING (2010)
 
During 2010, Coral completed 12 RC holes totaling 8,000 ft in the lower Triplet Gulch area where a previously identified historic resource was located. The purpose of this drilling was to verify the gold grade, reported thickness and continuity of mineralization in this zone. Also in 2010, 14 HQ-diameter diamond drill holes totaling 6,450 ft were completed as twins of existing RC holes in the South Porphyry, Altenburg Hill and Gold Pan Zones to test the reliability and continuity of gold grades returned by RC drilling acquire specific gravity and geotechnical data.
 
 
 
 
Coral Gold Resources Ltd. 10-5 January, 2012
 
Preliminary Economic Assessment   Robertson Property
  
10.3.1 Lower Triplet Gulch RC Drilling
 
The primary purpose of this drilling program was to verify the historic drilling results used to calculate the Triplet Gulch (also referred to as the “South Zone”) inferred mineral resource in the 2008 NI 43-101 Technical Report (Stokes, et al., 2008). In addition, the drilling was also directed at expanding the resource.
 
To evaluate the validity of this resource, Coral conducted a 12-hole RC program drilled on a grid with holes spaced 500 ft apart on lines also spaced 500 ft apart (Figure 10-6). The program consisted of 12 vertical RC holes, CR10-1 through CR10-12, totaling 8,000 ft and ranging in depth from 600 ft to 1,000 ft. Only two of the 12 RC holes, CR10-7 and -8, were completed to 1,000 ft. A summary of assay results, using a 0.01 ozAu/t cutoff grade is shown in Table 10.3.
 
The Triplet Gulch drilling occurred in an alluvial covered area that lies between 2,000- 4,000 ft southeast of the exposed southern contact of Tenabo granodiorite. The area is also 3,000 ft south of the Altenburg Hill inferred resource. Rocks exposed in the immediate vicinity if the drilling are mainly thermally metamorphosed upper plate greenstone, chert and argillite of the Devonian Slaven Chert, which are converted locally to biotite and quartz hornfels. Based on mapping and drilling, the overburden ranges from a few feet to 125-ft-thick.
 
The 2010 drilling results indicate that the while broad zones of anomalous gold values (>0.1 ppm) are present in the Lower Triplet Gulch area, only widely scattered narrow and discontinuous intervals of mineralization exceeding 0.01 ozAu/t were encountered. These results cast serious doubt as to the validity of the historic drilling and assaying that are the basis of the “South Zone” inferred mineral resource. The South Zone resource represents about 5.6% of the total of the total Robertson inferred mineral resources.
 
10.3.2 Diamond Drilling (2010)
 
Also in 2010, Coral completed a 14-hole diamond drilling program (CC10-1 through CC10-10 and CC10-12 through CC10-15) aimed at accessing the reliability and continuity of mineralization returned in the 2008 RC drilling in the South Porphyry, Altenburg Hill and Gold Pan Zones. Core drilling also provided geological and geotechnical data (RQD), and bulk samples for metallurgical testing. Eleven of the 14 core holes were drilled as twins of existing RC holes and were collared between 4 ft and 17 ft from their respective twin RC holes and with less than one foot of collar elevation difference. The drilling produced 960 twinned sample pairs, each representing a “twinned” five foot assay interval. A summary of assay results for the 2010 diamond drilling is presented in Table 10.4.
 
To compare the core vs. RC results the global average grades returned by all the core and corresponding twin RC holes were calculated. The average for all twin RC holes is 0.011 ozAu/t whereas the average grade of all core holes is 0.0107 ozAu/t, a difference of 0.0003 ozAu/t. If the top one percentile of assays is removed from the data
 
 
 
 
Coral Gold Resources Ltd. 10-6 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Table 10.3: Summary of assay results for the 2010 Lower Triplet Gulch RC drilling
 
Hole No.
Total
Depth(ft)
Angle
Azimuth
From
(ft)
To
(ft)
Thickness
(ft)
Grade
Au, oz/t
CR10-1
600
-90
0
0
10
10
0.023
       
130
135
5
0.0128
       
155
160
5
0.0112
       
195
200
5
0.0194
       
210
220
10
0.0139
       
255
260
5
0.0114
       
280
295
15
0.0142
       
460
480
20
0.0169
       
500
505
5
0.0132
       
555
560
5
0.0148
       
585
590
5
0.0107
       
595
600
5
0.0166
CR10-2
600
-90
0
55
60
5
0.0151
       
135
140
5
0.023
       
215
245
30
0.0344
       
275
280
5
0.0232
       
320
340
20
0.0207
       
360
370
10
0.0439
       
380
385
5
0.0207
       
460
465
5
0.0298
       
515
520
5
0.0295
       
580
585
5
0.0143
CR10-3
600
-90
0
20
25
5
0.0214
       
285
295
10
0.0326
       
350
360
10
0.0182
       
490
495
5
0.0102
       
515
535
20
0.0404
       
585
595
5
0.0162
CR10-4
600
-90
0
10
15
5
0.0417
       
320
340
20
0.0217
       
500
505
5
0.0122
       
580
600
20
0.0258
CR10-5
600
-90
0
105
110
5
0.0283
       
125
135
10
0.016
       
250
265
15
0.0118
       
310
325
15
0.0184
       
390
400
10
0.014
       
430
440
10
0.0172
       
480
485
5
0.0208
       
500
515
15
0.0129
       
585
595
10
0.0254
CR10-6
600
-90
0
320
325
5
0.0126
       
335
340
5
0.0118
CR10-7
1,000
-90
0
80
85
5
0.0476
       
95
100
5
0.418
 
 
 
 
Coral Gold Resources Ltd. 10-7 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
       
380
405
25
0.0125
       
570
575
5
0.0123
       
605
630
25
0.0119
       
705
715
10
0.0313
       
840
845
5
0.0146
       
870
885
15
0.0142
       
940
945
5
0.0389
       
970
975
5
0.0205
       
995
1,000
5
0.0516
CR10-8
1,000
-90
0
60
65
5
0.0463
       
75
80
5
0.014
       
185
210
25
0.0673
       
365
380
15
0.0195
       
525
530
5
0.0217
       
540
550
10
0.0274
       
560
565
5
0.011
       
610
670
60
0.0182
       
735
745
10
0.0172
       
765
770
5
0.0167
       
780
810
30
0.0164
       
855
870
15
0.0193
       
925
930
5
0.0152
       
990
995
5
0.0174
CR10-9
600
-90
0
75
85
10
0.0257
including
     
75
80
5
0.4891
       
180
185
5
0.0157
       
385
390
5
0.0162
CR10-10
600
-90
0
120
125
5
0.0259
CR10-11
600
-90
0
385
395
10
0.0118
CR10-12
600
-90
0
100
105
5
0.0197
       
500
505
5
0.0216
 
Calculated using a 0.010 ozAu/t cutoff grade
 
(>2.244 ppm Au for RC and >3.296 ppm Au for core), the RC holes average 0.01 ozAu/t and core holes average 0.0095 ozAu/t, a difference of 0.0005 ozAu/t. In both cases the average grade for all core holes is slightly lower than the twinned RC holes by 2.7 percent and 5 percent, respectively. The correlation coefficient for the two data sets is 0.2705, indicating that short range correlation of the assay data is poor.
 
When compared on a grade zone basis, defined by the 0.01 ozAu/t cutoff grade and at comparable elevations, the RC holes averaged 0.0225 ozAu/t and the cores holes averaged 0.0232 ozAu/t, a difference of 0.007 ozAu/t (+3 percent higher in core). Individual grade zones in twinned RC holes, defined by a 0.01 ozAu/t cutoff grade, are well reproduced in the corresponding core holes. When the average grade and thickness of all intervals within the defined grade zones are compared between the twin core and RC, the difference is 0.0014 ozAu/t and less than one foot in thickness.
 
These analyses indicate that while individual assay intervals vary between the 2008 twinned RC holes and the 2010 core holes, the corresponding grade zones are well within the acceptable range of reproducibility. In addition, there is no evidence of down hole contamination in the twinned RC holes.
 
 
 
 
Coral Gold Resources Ltd. 10-8 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Table 10.4: Summary of assay results for the 2010 diamond drill holes.
 
 
Total
   
Collar
     
Grade
Hole No.
Depth
(ft)
UTM east
UTM north
Elev.
(ft)
From
(ft)
To
(ft)
Thickness
(ft)
ozAu/t
CC10-1
400
527480.02
4461750
5174.31
130
270
140
0.022
         
350
365
15
0.011
CC10-2
400
527263.19
4461542
5189.43
20
55
35
0.010
         
210
235
25
0.024
         
285
290
5
0.071
CC10-3
500
527233.67
4461501
5200.03
20
140
120
0.023
         
315
375
60
0.032
         
390
395
5
0.037
         
475
495
20
0.010
CC10-4
500
527271.35
4461476
5192.19
0
40
40
0.024
         
60
170
110
0.022
         
300
320
20
0.013
         
365
380
15
0.044
CC10-5
450
527309.84
4461445
5185.79
45
150
105
0.029
including
       
65
70
5
0.223
         
290
300
10
0.046
         
325
340
15
0.017
CC10-6
400
527166.98
4461467
5228.34
0
35
35
0.011
         
60
145
85
0.019
         
175
320
145
0.021
CC10-7
400
527200.40
4461464
5227.10
5
15
10
0.021
         
75
155
80
0.040
including
       
130
150
20
0.109
         
190
195
5
0.031
         
275
295
20
0.013
         
325
330
5
0.040
CC10-8
500
527229.27
4461432
5227.19
95
175
80
0.019
         
230
245
15
0.023
         
290
305
15
0.021
         
320
350
30
0.026
         
390
405
15
0.022
         
465
470
5
0.035
         
490
495
5
0.11
CC10-9
500
527144.30
4461420
5260.98
50
145
95
0.014
         
195
215
20
0.027
         
270
285
15
0.029
         
325
350
25
0.012
         
370
385
15
0.015
         
475
490
15
0.021
CC10-10
500
527202.24
4461311
5309.92
30
50
20
0.014
         
80
115
35
0.012
 
 
 
 
Coral Gold Resources Ltd. 10-9 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
         
185
275
90
0.021
         
315
325
10
0.042
CC10-12
450
525942.49
4462473
5501.46
130
165
35
0.022
         
250
270
20
0.031
         
285
345
60
0.024
CC10-13
450
525887.66
4462398
5486.56
0
45
45
0.045
including
       
0
15
15
0.106
         
65
120
55
0.012
         
245
255
10
0.019
         
320
335
15
0.020
CC10-14
450
525916.60
4462428
5481.88
65
100
35
0.013
         
145
235
90
0.019
         
295
305
10
0.032
CC10-15
450
526004.09
4462409
5467.14
95
105
10
0.018
         
150
180
30
0.019
         
215
315
100
0.022
including
       
215
220
5
0.182
Total
6350
             
 
Calculated using a 0.010 ozAu/t cuff grade
 
10.4 DRILLING PROCEDURES
 
The Robertson Property has had a long and varied drilling history during which time at least 1,238 drill holes totaling 512,737 ft have been completed. About 13 percent of the total footage drilled occurred prior to Coral’s involvement in the property. As a result, much of the documentation regarding the early drilling programs is no longer available. What remains available is a digital compilation produced by Amax in the early 1990’s, that includes collar coordinates in local mine and UTM grid systems, elevation in feet, assay interval, and gold assay value. The sources of this information were manual compilations by Coral and Amax taken from driller’s logs, assay reports and assay certificates. In most cases no geologic logs were available.
 
The drilling methods employed by some early explorers are unknown (e.g. Aaron) or are not precisely known. It is known that the Superior and Placer Development drilling programs employed both conventional rotary drilling methods and “percussion” drilling methods. Conventional “open hole” rotary methods produce generally unreliable results because of chronic contamination problems and poor sampling technique. Except where twin RC or DDH have verified the original assays, much of the early results were not used in resource evaluations. Table 10.5 provides a summary of drilling in the district by companies known to have operated there since about 1968.
 
 
 
Coral Gold Resources Ltd. 10-10 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Table 10.5: Robertson Property Drilling Summary.
 
Company
Number
of Holes
Drilling
Method
Down Hole Survey
Collar Survey
Footage Drilled(ft)
Ave Hole Depth (ft)
Superior
92(?)
Conv. Rtry
no
yes
c.32,000
348
Placer Dev.
23(?)
Conv. Rrty
no
yes
c.3,200
150
Aaron
N/A
Percussion
no
some
<1,000
8-10
E & B Expl.
148
RC(?)
“Percussion”
no
yes
30,800
200
Coral
380 7
RC DDH
no
?
yes
yes
105,877
3,500
278
500
Amax
338
62
RC DDH
yes
yes
yes
yes
141,700
34,300
420
553
Cortez
46
1
RC
Mud Rtry
yes
?
yes
yes
54,000
3,000
1,174
Coral Gold
125
10
2
RC
DDH
Fldd RC
yes
 no
yes
yes
yes
yes
90,470
6,440
6,450
745
450
3,225
TOTAL
1,238
     
512,737
398
 
The E & B Exploration drilling is described in various reports by J. DeLeen (1980 and 1981) as “percussion”, but it is believed to have been reverse circulation. Except for the Amax digital compilation, the only remaining record of the E & B drilling is a complete set of drill cuttings retained for each sample interval. In addition, approximately 20 chip boards have also been preserved. The cuttings are stored on site in 20-compartment plastic chip trays identified by hole number and footage. E & B routinely sampled the drill holes on even 5-ft intervals. Of the 148 “percussion” holes drilled by E & B, the majority of which were 200 ft or less in depth and all were drilled vertical.
 
In 1987, Coral developed a local north-south, east-west survey grid consisting of surveyed triangulation stations. All of the pre-Coral drill collars located in the field were subsequently tied to the local grid. Elevation control was determined from the USGS “Tenabo” bench mark (5,164.1 ft) situated at the east edge of the local survey grid.
 
10.4.1 Coral RC Drilling (1986-1989)
 
Documentation of the Coral RC and core drilling is incomplete. At the time of the Amax compilation (c.1991-92), the Coral drilling records were well organized and complete, and included driller’s logs, sample interval, and assay report. Of the 380 RC holes drilled by Coral, the majority were less 250-ft-deep and fewer than 20 holes were inclined. Most holes had summary geologic logs and are on file in Coral’s Crescent Valley office. The summary logs are included in the Amax digital compilation. A complete set of drill cuttings are retained for each RC sample interval and are stored on site in 20-compartment plastic chip trays identified by hole number and footage. Sampling was routinely done on even 5-ft-intervals over the length of the hole, including overburden. All drill collars were surveyed and tied to the local mine grid. No down-hole surveys were done on the Coral RC holes.
 
The majority of the Coral RC drilling was completed by two local drilling contractors: Eklund Drilling Company of Elko, NV and Rimrock Drilling also of Elko. The 7 core holes were drilled by Coates Drilling of Delta, B.C., Canada.
 
 
 
Coral Gold Resources Ltd. 10-11 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
10.4.2 Amax RC Drilling
 
The methodology of the Amax RC drilling is well documented. Amax completed 342 RC holes, AT-1 through AT-341, totaling nearly 142,000 ft. Over 90 percent of the RC holes were drilled vertical to depths ranging from 400 ft to 2,830 ft (AT-3). Overburden depths varied from none to 60 ft. Where thin overburden was encountered, a minimum of 10 ft of steel surface casing was installed. In deeper overburden, 20 ft to 40 ft of steel casing was installed. Drill hole diameter averaged 5.5 inches and samples were collected on even 5-ft interval starting at the overburden-bedrock interface. Because of the low-angle orientation or flat-lying nature of most mineralized zones at Robertson, sample length (5 ft) is believed to represent true thickness.
 
Most RC holes drilled to depths of <1,000 ft, were completed using conventional down-the-hole hammer bits with conventional cross over assembly. Holes exceeding 1,000 ft feet were completed using standard tricone bits. All RC holes exceeding a depth of 400 ft had down-hole surveys using a multi-reading magnetic vertical deviation tool. Measured deflection in deeper hole ranged up to 105 ft, but averaged about 55 ft and is not considered serious. Surveys were conducted by Century Geophysics of Elko, NV. Prior drilling experience indicate that hole less than 400 ft deep had negligible deflection. Drill collars were surveyed and tied to the local grid system by registered surveyors from Desert Mountain Surveying of Winnemucca, NV.
 
Character samples for each 5-ft assay interval were collected from the reject port of the sample splitter and logged at the drill site. The drill cuttings are stored in 20-compartment plastic chip trays and stored on site. Geologic observations were recorded on standardized logging forms and included percentage oxidation, primary and secondary lithology, alteration and mineralization. The Amax drill logs are no longer in the possession of Coral.
 
The drilling contractor for 90 percent of the holes was Eklund Drilling Company of Elko, NV. The remaining holes were drilled by Lang Exploratory Drilling of Salt Lake City, UT and Becker Drills of Denver, CO. All of the contractors are well regarded and highly experienced.
 
10.4.3 Amax Diamond Drilling
 
Amax completed 62 DDH, CAT-1 through CAT-62, totaling over 34,000 ft. The principal drilling contractor was Longyear Drilling of Dayton, NV, a well-respected drilling company, who generally preformed above industry standard. The initial four core holes were completed by Tonto Drilling Company of Spokane, WA. At that time, their performance on the project was considered substandard due to their poor core recovery efforts.
 
Of the 62 DDH, 56 were drilled using HQ-diameter (2.5 inches) diamond impregnated bits, 5-ft core barrels and wire-line method. Six holes were inclined and nine were drilled using PQ-diameter (3.33 inches) tools in order to collect samples for metallurgical testing (column leach tests). Core orientation studies were attempted in four of the HQ core holes with only limited success. All hole collars were surveyed and tied to the local grid coordinate system. Down-the-hole surveys were completed on 90 percent of the core holes using a standard single shot camera survey tool. Shots were taken at regular 100 ft intervals.
 
Core was retrieved from the drill site in standard waxed cardboard core boxes (5 ft/box). Wooden blocks indicating footage were placed at the end of each core run by the driller. Prior to logging, the core was measured and marked into even 5-ft or less sample intervals. The percentage of core recovery was determined and RQD data collected and recorded on a standardized form. The core was cleaned of drilling mud and grease, and photographed. Detailed geologic observations of the core were made using a standardized logging form. Key observations included percent oxidation, primary and secondary lithology, alteration, mineralization and structure. In addition, 15 secondary fields were also visually estimated. Small lengths of representative core were collected at regular intervals over the entire length of the holes as a visual record. The “skeleton” core is stored on site in standard cardboard core boxes identified with hole number and footage interval. Individual core is identified by hole number and footage in permanent marker.
 
 
 
 
Coral Gold Resources Ltd. 10-12 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
10.4.4 Cortez RC Drilling
 
The Cortez drilling consisted of 46 RC holes totaling 54,000 ft and one “mud rotary” hole drilled to a depth of 3,000 ft. The RC drilling contractor was Eklund Drilling Company of Elko, NV, a well-respected and experienced drilling company. The mud rotary hole was completed by the Lang Division of Boart Longyear of Salt Lake City, UT, a well-respected and experienced drilling company.
 
Of the 46 RC holes 34 were drilled to a depth of between 1,000 ft to 2,000 ft and 12 were drilled to a depth of 500 ft to 900 ft. Twelve holes were inclined from 52° to 62°. All of the RC holes had down-hole surveys using a multi-reading magnetic vertical deviation tool. The surveys were conducted by Silver State Surveys, Inc., of Elko, NV. None of the measured deflection is considered serious.
 
Cortez routinely sampled the RC holes at 10-ft intervals over the entire length of the hole. Because of the low-angle orientation or flat-lying nature of most mineralized zones at Robertson, sample length (10 ft) is believed to represent true thickness. No geologic logging was completed and no other details, except assay results were provided. Character samples were collected for each 10-ft assay interval in 20-compartment plastic chip trays which are stored off-site.
 
10.4.5 Coral RC Drilling (2004-2006, 2008 and 2010)
 
The methodologies employed during the period 2004 through 2010 for the various Coral RC drilling programs are well documented. During that time period Coral completed 125 RC holes totaling 90,470 ft. A summary of the Coral RC drilling from 2004 through 2010 is presented in Table 10.6. Depths of the holes varied from 345 ft to 1,500 ft. Overburden depths ranged from none to 125 ft. A total of 122 of the RC holes were drilled vertical to depths ranging from 345 ft to 1,500 ft. Three holes were inclined at angles of between 60° and 70° and drilled to depths of 600 ft to 725 ft. Where thin overburden was encountered, a minimum of 10 ft of steel surface casing was installed. In deeper overburden, 20 ft to 40 ft of steel casing was installed. Drill hole diameter averaged 5.5 inches and samples were collected on even 5-ft interval starting at the overburden-bedrock interface. Because of the low-angle orientation or flat-lying nature of most mineralized zones at Robertson, sample length (5 ft) is believed to represent true thickness.
 
The drilling was conducted using truck-mounted TH-75 Ingersoll Rand and Drill Tech D40K drills with 900 cfm/350 psi compressors. These drills employ air-cyclone sample collection equipment that meet current industry standard. Auxiliary air compressors were employed when extremely hard rock conditions were encountered. Standard care was taken to minimize contamination during all parts of sampling procedure. In addition, a geologist was at the drill site during all phases of the drilling and sampling procedure.
 
 
 
 
Coral Gold Resources Ltd. 10-13 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Most RC holes drilled to depths of <1,000 ft, were completed using conventional down-the-hole hammer bits with conventional cross over assembly. Holes exceeding 1,000 ft feet were completed using standard tricone bits.
 
All RC holes exceeding a depth of 600 ft had down-hole surveys using a multi-reading gyroscopic vertical deviation tool. Measured horizontal deflection at the bottom of holes with total depth between 600 ft and 1,000 ft ranged from 9 ft to 24.5 ft on azimuths varying from nearly due north to east-southeast. Within ore-grade intersections, deflection varied from 7 ft to 21.5 ft along similar azimuths. The measured deflections are considered negligible. Measured horizontal deflections in deeper holes (>1,000 ft) ranged up to 67 ft, but averaged about 22 ft and is not considered serious. Surveys for holes drilled in 2004 were conducted by Wellbore Navigation, Inc of Elko, NV. Surveys of holes drilled in 2005 and later were done by International Directional Services of Elko, NV. Prior drilling experience indicated that holes less than 600 ft deep had negligible deflection. Drill collars were surveyed and tied to the UTM and local grid systems by registered surveyors from Summit Engineering of Elko, NV.
 
Character samples for each 5-ft assay interval were collected from the reject port of the sample splitter and logged at the drill site. Drill cuttings are stored in 20-compartment plastic chip trays and stored on site. Geologic observations were recorded on standardized logging forms and included percentage oxidation, primary and secondary lithology, alteration and mineralization.
 
The drilling contractor for the 2004-2010 drilling programs was Lang Exploratory Drilling, a division of Boart Longyear, Inc. of Elko, NV. Lang is a well-regarded and highly experienced RC drilling company.
 
Table 10.6: Summary of Coral RC drilling from 2004 through 2010.
 
Year
Drilled
Hole No.
Holes
Drilled
Hole
Depth (ft)
Total
Footage
Drilling
Contractor
Down Hole
Survey
Collar
Survey
2004
CR04-1 to -20
20
485-850
13,600
Lang
>600ft
UTM
2005
CR05-1 to -12
12
500-1,200
10,420
Lang
>600ft
UTM
2006
CR06-2 to -48A
48
445-1,500
35,615
Lang
>600ft
UTM
2007
TV07-1, -2
2
3,450
6,440
Lang
>600ft
UTM
2008
CR08-1, -3 to -6
CR08-10 to -11
CR08-13 to -38
33
345-1,200
22,835
Lang
>600
UTM
2010
CR10-1 to -12
12
600-1,000
8,000
Lang
>600
UTM
Total
 
127
 
96,910
     
 
10.4.6 Coral Flooded RC Drilling (2007)
 
The 2007 deep drilling was conducted using an LM 120 drill capable of reaching depths exceeding 3,000 ft and which employs a flooded RC method. This method uses conventional RC drilling starting at the surface with a 9 inch hammer bit and conventional crossover assembly. The conventional RC drilling is advanced as deep as possible, typically 600-900 ft deep, in order to reach at least 250 ft below the local water table. Once the hammer bit has reached its maximum depth, the hole is converted to flooded RC. This method employs a 9 inch tricone bit followed by a series of stabilizers, several hundred feet of drill collars (for added weight), a series of crossover assemblies and finally conventional 20-ft-long dual-walled RC drill rods. Drilling fluid is introduced into the hole through the casing between the drill rods and the wall of the hole. A portion of the fluid reaches the drill bit and working face while the rest is captured by the crossover assembly. At the same time high pressure compressed air is introduced through the outer annulus of the dual-walled RC rods and mixes with the drilling fluid that enters through the crossovers, creating a highly buoyant air-charged fluid that rises at high velocity (>1,000 ft/sec) through the center tube of the RC rods to the surface. This rapid upward movement creates a significant vacuum at the bit face where the sample, entrained in the fluid, also passes rapidly upward through holes in the bit face, stabilizers and collars, mixes with the buoyant air-charged fluid and ascends at high velocity to the surface. The sample and fluid are discharged into a cyclone where, once their velocity is slowed, they empty on to a series of stacked vibrating screens. At this point the drilling fluid and some very fine sample are separated from the bulk sample and sent to a de-sander where the fine rock material is available for sampling and discharged into the mud sump. The drilling fluid is returned to a holding tank to be reused. The entire sample interval is discharged into a Gilson-type sample splitter directly from the vibrating screens.
 
 
 
 
Coral Gold Resources Ltd. 10-14 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Down-the-hole directional surveys were conducted on both holes by International Directional Services, Inc. of Elko, Nevada, using a gyroscopic directional survey tool that measures horizontal and vertical deflection in the hole. TV07-1 had a total deviation of 500 ft in a northeasterly direction at the bottom of the hole. TV07-2 had a total deviation of 118 ft in a due east direction at 3,200 ft.
 
The drilling contractor for this program was Lang Exploratory Drilling, a division of Boart Longyear, Inc., of Elko, Nevada. Lang is a highly experienced drilling company specializing in reverse circulation and is an industry leader in deep exploration. Lang’s performance on this project was excellent and met current industry standard.
 
10.4.7 Coral Diamond Drilling (2010)
 
In 2010, Coral completed 14 vertical, HQ diameter diamond core holes, CC10-1 through CC10-15 (CC10-11 abandon) totaling 6,450 ft. The drilling contractor for this program was Major Drilling Inc. of Salt Lake City, Utah. Major Drilling is a highly experienced core drilling company. Their performance on this project was plagued by inexperienced drilling crews, equipment breakdowns, crew absenteeism and generally poor core recovery in critical mineralized areas.
 
All 14 core holes were drilled using a truck mounted LF-70 diamond core drill using conventional HQ-diameter (2.5 inch core) diamond impregnated bits, 5-ft core barrels and standard wire-line method. Overburden depth ranged from none to 30 ft. A minimum of 10 ft of casing was installed in all holes. Hole CC10-1, which was collared on the gravel-covered South Porphyry Zone, employed 35 ft of casing. Hole depths varied from 400 ft to 500 ft. Drill collars were surveyed by Summit Engineering of Elko, Nevada. No down-the-hole surveys were conducted.
 
Core was retrieved from the drill site in standard waxed cardboard core boxes (10 ft/box). All core boxes were marked with hole number, footage interval and box number. Wooden blocks indicating footage were placed at the end of each core run by the driller. Prior to logging, the core was measured and marked into even 5-ft or less sample intervals. The percentage of core recovery was determined and RQD data collected and recorded on a standardized form. The core was cleaned of drilling mud and grease, and photographed. Detailed geologic observations of the core were made using a standardized logging form. Key observations included percent oxidation, primary and secondary lithology, alteration, mineralization and structure. In addition, 15 secondary fields were also visually estimated. Small lengths (3-6 inches) of representative core were collected at regular intervals over the entire length of the holes for specific gravity measurements and as a visual record. A total of 279 samples were collected and measured for specific gravity. The “skeleton” core is stored on site in standard cardboard core boxes identified with hole number and footage interval. Individual core is identified by hole number and footage in permanent marker.
 
Because the core was to be used for metallurgical testing, it was not split or sawed prior to bagging in pre-numbered heavy 17 in x 28 in canvas bags.
 
Core recovery for individual 5-ft assay intervals varied 0 to 100 percent. However, core recovery in the top 10 ft to 30 ft of most holes and within certain mineralized intervals was considered to be poor (<50 percent recovery). Overall core recovery for entire holes ranged from 87.4 to 97.5 percent and averaged 93.4 percent.
 
 
 
Coral Gold Resources Ltd. 10-15 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
SECTION 11.0 SAMPLE PREPARATION, ANALYSES AND SECURITY
 
11.1 INTRODUCTION
 
The authors have no first-hand knowledge of the sampling procedures employed during the exploratory drilling programs prior to Coral (pre-1986) (85 holes), as well as the procedures used by Coral (1986-1989) (403 holes). In addition, no written documentation or description of the sampling procedures employed by these companies was found in the Coral files. It cannot be assumed that the sampling procedures used by these companies would meet industry standard of today. However, the authors also have no reason to believe the procedures used in the past were, in any way, suspect or unprofessional. For the purpose of the inferred resource estimate, all holes were utilized due to confidence factors. These holes are distributed throughout the Gold Pan, Porphyry, Altenburg Hill and in particular the Triplet Gulch areas. Further validation and verification is required in order to utilize these holes in an upgraded resource however the grade distribution with and without these holes is within acceptable limits. Therefore, the inclusion or exclusion of these holes will not adversely affect the resource with the exception of Triplet Gulch were a much more rigorous validation program is required.
 
Additionally, the authors have no first-hand knowledge of the sampling procedures employed by Cortez (1999). No written documentation or verbal description of the sampling procedures used at the Robertson Property was provided by Cortez. However, it can be assumed that Cortez employed the same or similar sampling protocol on this project as is used at their nearby mining operation and that it meets current industry standard.
 
The sampling procedures employed by Amax and Coral Gold during their RC and the core drilling programs are well documented and, as Senior Project Geologist for Amax and as the supervising Qualified Person for Coral at the Robertson Property, the author has first-hand knowledge of their sampling methodologies. The sampling protocols used by Amax and Coral Gold on this project meet current industry standards.
 
11.2 AMAX RC AND CORE DRILLING
 
A summary of sampling methods employed by Amax during RC and core drilling operations at Robertson were previously reported in the NI 43-101 compliant technical report Mineral Resource Estimate for the Robertson Property, Lander County, Nevada, USA (Stokes et al., 2008) available on SEDAR.
 
11.3 CORAL GOLD RESOURCES RC SAMPLING (2004-2006)
 
A summary of sampling methods employed by Coral during their 2004-2006 RC drilling operations at Robertson were previously reported in the NI 43-101 compliant technical report Mineral Resource Estimate for the Robertson Property, Lander County, Nevada, USA (Stokes et al., 2008) available on SEDAR.
 
11.4 CORAL GOLD RESOURCES RC SAMPLING (2007)
 
The 2007 deep drilling was conducted using an LM 120 drill which employs a flooded RC method. This method uses conventional RC drilling starting at the surface until the hole is advanced as deep as possible, typically 600-900 ft deep. Once the hammer bit has reached its maximum depth, the hole is converted to flooded RC.
 
 
 
 
Coral Gold Resources Ltd. 11-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Since the two deep holes were drilled from the surface using conventional RC methods, samples were initially collected using an air-cyclone collection system. From the cyclone, samples were discharged into a radial rotating wet splitter. The split assay sample is collected in 5 gallon plastic buckets. Samples were decanted of excess water and transferred to pre-numbered 11 x 17 inch micro-pore sample bags. The reject material from the splitter is discharged into the mud sump. The sample collection buckets were cleaned after every sample using high pressure water hose. The splitter was routinely cleaned using a high pressure hose at every 20 ft rod change.
 
While using flooded RC, samples were collected in a similar air-cyclone collection system that discharged on to a series of stacked vibrating screens. Samples are discharged directly from the vibrating screens into a Gilson-type sample splitter. The split assay sample was collected in a 2.5 gallon pan. The split assay sample is transferred to a pre-numbered 11 x 17 inch micro-pore sample bag. The reject material from the splitter is discharged into the mud sump. The vibrating screens, sample splitter and sample collection pans are cleaned using a high pressure water hose after every sample.
 
Samples for assay were collected on even 10 ft intervals starting at the surface. During sampling, pre-numbered “rig duplicate” samples were routinely collected from the reject outlet of the splitter. These samples were used to assess the effectiveness of the sampling procedure and the natural distribution of gold in the rock by comparing them with the “original” sample.
 
Once the samples were dry, all drill samples were weighed at the lab. The average dry weight for a 10-ft sample was about 6.7 kg. Together with observations at the drill site, monitoring sample weights provided data from which sample recovery could be estimated.
 
11.5 CORAL GOLD RESOURCES RC SAMPLING (2008, 2010)
 
The 2008 and 2010 drilling programs were conducted using a truck-mounted Drill Tech D40K drill with 900 cfm/350 psi compressor. These drills employ air-cyclone sample collection equipment that meets current industry standard. Standard care was taken to minimize contamination during all phases of the sampling procedure. In addition, a geologist was at the drill site during the drilling and sampling procedure.
 
All drill holes were drilled wet beginning at the surface. Under these conditions, a small amount of water is injected during the drilling process until the water table is encountered, which varied from 220-ft- to 475-ft-deep. Samples for gold assay were collected on even 5-ft intervals starting at the surface. During wet drilling conditions, drill cuttings were spit on site using a radial rotating wet splitter. The purpose of splitting the sample was to obtain a consistent and representative sample weighing 3-4 kg. When drilling wet, samples were collected using a series of 5 gallon plastic buckets. The samples were decanted of excess water and transferred to pre-numbered heavy 10 inch x 17 inch sample bags. The sample collection buckets were cleaned using a high pressure water hose after each sample. The wet splitter was routinely cleaned with a high pressure water hose at every 20 ft rod change. In zones of high water flow, the 5-gallon sample buckets filled and overflowed with water and fine-grained material. These “fines” were not captured. Previous sampling studies of this material indicated that the gold content was negligible in the overflow material.
 
Character samples for each 5-ft assay interval were collected from the reject port of the sample splitter and logged at the drill site. The drill cuttings are stored in 20-compartment plastic chip trays that are stored on site. Geologic observations were recorded on standardized logging forms and included percentage oxidation, primary and secondary lithology, alteration and mineralization.
 
 
 
 
Coral Gold Resources Ltd. 11-2 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
During RC drilling, “rig duplicate” samples were routinely collected from the reject outlet of the splitter. These samples were used to assess the effectiveness of the sampling procedure and were compared with the “original” sample. Additionally, specially collected coarse “blank” (<0.005 ppm) and very low-level material (<0.025 ppm Au) were inserted into the sample sequence at pre­determined intervals to monitor possible lab contamination such as smearing of coarse gold on sample preparation equipment.
 
Once the samples were dry, all RC samples were weighed at the lab. The average dry weight for a 5- ft sample was about 4.0 kg. Together with observations at the drill site, monitoring sample weights provided data from which sample recovery could be estimated.
 
11.6 CORAL GOLD RESOURCES DRILL CORE SAMPLING (2010)
 
Drill core was delivered to Coral’s logging facility directly from the drill site at the end of each shift in core boxes containing approximately 10 ft of 2.5 inch diameter core. Each box is marked with hole number, interval footage and box number. Wooden core blocks are inserted at the end of each drill run with the measured depth marked on the block. At the logging facility the core is measured and core recovery was determined for each 5-ft assay interval. Individual assay intervals were marked by wooden blocks. Core recovery averaged 93.4 percent. After cleaning, photographing and detailed logging, the entire unsplit, 5-ft assay interval was placed in a pre-labeled heavy canvas bag. Each bag was labeled with hole number and a unique sample number. The samples remained in the logging facility until they were picked by the assay lab.
 
A total of 279 representative core samples (3-6 inches long) were collected and measured for specific gravity, which are stored on site.
 
Specially collected coarse barren material were inserted into the sample sequence at pre-determined intervals to monitor possible lab contamination and smearing of coarse gold on sample prep equipment.
 
11.7 SAMPLE PREPARATION, ANALYSES AND SECURITY
 
11.7.1 Introduction
 
The authors have no first-hand knowledge of the sample preparation protocols, analytical methodology and sample security that were employed at the Robertson Property by companies prior to Coral (pre-1986), as well as the procedures used by Coral (1986-1989). No written documentation or description of these procedures was found in the Coral files. Further, it cannot be assumed that the sample preparation, analytical procedures and sample security measures used by the early companies would meet industry standard of today. However, the authors also have no reason to believe the procedures used in the past were, in any way, suspect or unprofessional. For the purpose of the inferred resource estimate, all holes were utilized due to confidence factors. These holes are distributed throughout the Gold Pan, Porphyry, Altenburg Hill and in particular the Triplet Gulch areas. Further validation and verification is required in order to utilize these holes in an upgraded resource however the grade distribution with and without these holes is within acceptable limits. Therefore, the inclusion or exclusion of these holes will not adversely affect the resource with the exception of Triplet Gulch were a much more rigorous validation program is required.
 
The authors have no first-hand knowledge of the sample preparation protocols, analytical procedures or sample security measures employed by Cortez (1999) during their evaluation of the Robertson Property. It should also be noted that no written or oral description of these procedures was provided by Cortez. However, it may be assumed that the sample preparation, analytical procedures and sample security used by Cortez on this project would meet industry standard of today.
 
 
 
 
Coral Gold Resources Ltd. 11-3 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
The sample preparation protocol, analytical procedures and sample security measures employed by Amax (1990-1996) and Coral Gold (2004-2010) during their RC and core drilling programs are well documented and, as Senior Project Geologist for Amax and as the supervising Qualified Person for Coral Gold at the Robertson Property, the author also has first-hand knowledge of these methodologies. The sample preparation protocols, analytical procedures and sample security measures used by Amax and Coral Gold on this project meet current industry standard practices.
 
11.7.2 Amax Drill Sample Security Measures
 
All RC and core samples remained on the project site until they were picked up by the analytical lab. No sample preparation occurred on-site. Access to the samples prior to pick up by the lab, by non-Amax or Coral personnel was controlled during both daylight and night-time hours. While it is the opinion of the author that no tampering with samples occurred during this period and, within the context of the entire drilling program, large-scale tampering would have been impossible to achieve.
 
11.7.3 Analyses of Amax Drill Samples
 
During the period 1990-91 and 1993-94, Amax employed Monitor Geochemical Laboratory, with sample prep and analytical facilities in Elko, NV, as its principal analytical lab for the Robertson Property. In 1992, the principal laboratory was Bondar-Clegg, with sample prep facilities in Reno, NV and analytical laboratories in Vancouver, B.C. In 1993-94, during the Porphyry Zone evaluation, Chemex Labs, Inc. was chosen as the secondary (umpire) lab and used primarily to verify sample prep and check assaying.
 
The Amax sample preparation protocol was used at the Monitor, Bondar-Clegg and Chemex sample prep facilities and is summarized below:
 
·  Entire drill sample was dried in the sample bag and weighed;
·  Entire 25-35 pound (11-16 kilograms) sample jaw-crushed to 95% -10 mesh;
·  Crushed material reduced to 6 kilograms (13 pounds) with Jones-type splitter;
·  Reject material saved and stored at lab;
·  Entire 6 kilogram sub sample disk-pulverized to 95% -80 mesh;
·  Pulverized material reduced to 350 gram with Jones-type splitter
·  350 gram sub sample passed through rotary mill to 95% -200 mesh;
·  nominal 350 gram pulp sample sent for analysis;
·  Jaw crusher, rotary mill and pulverizer were cleaned by passing barren gravel and sand between samples; Jones splitter cleaned by compressed air.
 
The gold assay procedure used at both Monitor and Bondar-Clegg facilities is summarized below:
 
·  Re-homogenization of the 350 gram pulp;
·  One-assay ton (nominal 29.1 grams) weighed from 350 gram pulp;
·  One-assay ton fire assay followed by bead digestion in aqua regia and AA determination;
·  All values exceeding 10 ppm gold are re-assayed using one-assay ton with gravimetric finish.
 
 
 
 
Coral Gold Resources Ltd. 11-4 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
11.7.4 Metallic Screen Analyses
 
During the Porphyry Zone evaluation, concern over the presence of “coarse” gold prompted Amax to initiate “screen fire” analysis, considered the most accurate assay method for assessing coarse gold. The evaluation consisted of 132 screen fire assays (about 1 percent of all sample in the Porphyry Zone). The screen fire assay procedure employed at Monitor is summarized below:
 
·  Split a 1 kilogram (2.2 pounds) sub sample from the –10 mesh reject material;
·  1 kilogram sub sample pulverized in ring and puck mill to nominal –150 mesh;
·  Pulverized material weighed (weight recorded);
·  Entire sample wet sieved through 150 mesh screen;
·  Entire +150 mesh (oversize) collected, dried, weighed and fire assayed;
·  Entire –150 mesh (undersize) collected, dried and a 2-assay ton split (58.3 grams) fire assayed;
·  Assay results of the two size fractions are combined by weighted averaging to determine the reported assay.
 
11.7.5 Cyanide-Soluble Gold and Copper Analyses
 
During evaluation of the Porphyry Zone resource, cyanide soluble gold and copper analyses were routinely performed on all samples with FA/AA gold values > 0.01 ozAu/t (over 2,100 samples). The cyanide soluble analytical procedure consisted of leaching 10 grams of –200 mesh pulp material in a flask for 24 hours in a 100 ml solution of one gram/liter NaCN solution. The leach solution was analyzed for gold and copper by atomic absorption spectrometry.
 
11.7.6 Use of Standards and Blanks
 
In order to assess the Monitor and Bondar-Clegg sample prep and analytical performance, Amax developed a QA/QC program consisting of submitting “blind” coarse blank material (3.5 %), rig duplicates (4 %) and Amax prepared standard pulps (9.3 %) into the sample stream. All reference materials were pre-numbered in sequence with the drill samples and submitted blind to the labs without unique identifiers. Standard pulps were chosen to match as closely as possible the oxidation state, expected grade and sulfide content of the accompanying drill samples.
 
Over 900 samples, representing coarse reject material and pulps, were randomly selected for sample preparation and gold assay determinations by Chemex. These materials were shipped by the primary lab. Sample prep and analytical procedure used by the secondary lab were same as those used by the primary lab facilities.
 
11.7.7 Coral Gold RC Drill Sample Security Measures (2004-2010)
 
All RC samples remained on the project site until they were picked up by the analytical lab. No sample preparation occurred on-site. No Coral personnel were involved in any aspect of sample preparation. Access to the samples prior to pick up by the lab by non- Coral personnel was controlled during daylight hours only. While it is the opinion of the author that no tampering with samples occurred during this period and, within the context of the entire drilling program, large-scale tampering would have been impossible to achieve.
 
 
 
 
Coral Gold Resources Ltd. 11-5 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
11.7.8 Analyses of Coral Gold RC Drill Samples (2004-2010)
 
During the period 2004-2010, Coral employed ALS Chemex with sample prep facilities in Elko, NV and analytical laboratories in Reno, NV to perform sample preparation and gold assays. ALS Chemex laboratories in North America are registered to ISO 9001:2000 by QMI Quality Registrars.
 
The sample preparation protocol used at the ALS Chemex sample prep facilities and is summarized below:
 
·  Entire drill sample was dried in the sample bag and weighed;
·  Entire 7-15 pound (3.2-6.7 kilograms) sample jaw-crushed to 70% -2mm;
·  Crushed material reduced to 1 kilogram (2.2 pounds) with riffle-type splitter;
·  Reject material saved and stored at lab;
·  Entire 1 kilogram sub sample disk-pulverized to 85% -200 mesh;
·  Pulverized material reduced to 250 gram with riffle-type splitter;
·  nominal 250 gram pulp sample sent for analysis;
·      Jaw crusher and pulverizer were cleaned after every sample by passing barren gravel and sand.
 
The gold assay procedure used at ALS Chemex facilities is summarized below:
 
·  Re-homogenization of the 250 gram pulp;
·  One-assay ton (nominal 29.1 grams) weighed from 250 gram pulp;
·  One-assay ton fire assay followed by bead digestion in aqua regia and AA determination;
·  All values exceeding 10 ppm gold are re-assayed using one-assay ton with gravimetric finish.
 
11.7.8.1 Use of Standards and Blanks
 
In order to assess the ALS Chemex sample prep and analytical performance, Coral developed a QA/QC program consisting of submitting “blind” coarse blank and low-level gold material (4.3 %), rig duplicates (2.1 %) and standard reference pulps (1.2 %) into the sample stream. All reference materials were pre-numbered in sequence with the drill samples and submitted blind to the labs without unique identifiers. Standard pulps were chosen to match as closely as possible the oxidation state, expected grade and sulfide content of the accompanying drill samples.
 
In 2004-2005, over 146 samples, representing coarse reject material and pulps, were selected for additional sample preparation and gold assay determinations by ALS Chemex. In 2006, a total of 604 samples, representing coarse reject material, were selected for additional sample preparation, compositing and gold assay determinations by McClelland Labs and Rocky Mountain Geochemical, both located in Sparks, NV, USA.
 
The sample preparation protocol, analytical procedures and sample security measures employed by Coral Gold during its 2004-2010 RC drilling programs meet current industry standard practices. As the supervising Qualified Person for Coral Gold at the Robertson Property, the author also has first­hand knowledge of these methodologies.
 
11.7.9 Coral Gold Core Drilling Sample Security Measures (2010)
 
At the end of each drill shift, core samples were delivered to a secure Coral storage facility in Crescent Valley, Nevada. No sample preparation occurred on-site. No Coral personnel were involved in any aspect of sample preparation. Access to the samples prior to delivery to Coral personnel was controlled at all time during drilling operations (24 hrs). While it is the opinion of the author that no tampering with samples occurred during this period and, within the context of the entire drilling program, large-scale tampering would have been impossible to achieve.
 
 
 
Coral Gold Resources Ltd. 11-6 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
11.7.10 Analyses of Coral Gold Core Drilling Samples (2010)
 
During the 2010 drilling program, Coral employed ALS Chemex with sample prep facilities in Elko, NV and analytical laboratories in Reno, NV to perform sample preparation and gold assays. ALS Chemex laboratories in North America are registered to ISO 9001:2000 by QMI Quality Registrars.
 
Because one of the objectives of the 2010 core drilling was to supply samples for metallurgical testing, a special sample preparation was designed to provide nominal 3/4 inch crushed material for column leach tests. The modified sample protocol used during the core drilling is summarized below:
 
      Entire drill sample was dried in the sample bag and weighed;
      Entire 24.2 pound (average sample weight 11.0 kilograms) sample jaw-crushed to -3/4 inch;
  1 kilogram (2.2 pounds) split from -3/4 inch crushed sample with rotary-type splitter;
      Entire -3/4 inch coarse reject material saved and stored at the lab;
      Entire 1 kilogram sub sample disk-pulverized to 85% -200 mesh;
      Pulverized material reduced to 250 gram with riffle-type splitter;
      nominal 250 gram pulp sample sent for analysis;
      Jaw crusher and pulverizer were cleaned after every sample by passing barren gravel and sand.
 
The gold assay procedure used at ALS Chemex facilities is summarized below:
 
       Re-homogenization of the 250 gram pulp;
      One-assay ton (nominal 29.1 grams) split and weighed from 250 gram pulp;
      One-assay ton fire assay followed by bead digestion in aqua regia and AA determination;
      All values exceeding 10 ppm gold are re-assayed using one-assay ton with gravimetric finish.
 
11.7.10.1 Use of Standards and Blanks
 
In order to assess the ALS Chemex sample prep and analytical performance, Coral developed a QA/QC program consisting of submitting “blind” coarse blank and low-level gold material (5.3 %) and standard reference pulps (3.7 %) into the sample stream. All reference materials were pre-numbered in sequence with the drill samples and submitted blind to the labs without unique identifiers. Standard pulps were chosen to match as closely as possible the oxidation state, expected grade and sulfide content of the accompanying drill samples.
 
The sample preparation protocol, analytical procedures and sample security measures employed by Coral Gold during its 2010 core drilling program meet current industry standard practices. As the supervising Qualified Person for Coral Gold at the Robertson Property, the author also has first-hand knowledge of these methodologies.
 
 
 
 
Coral Gold Resources Ltd. 11-7 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
SECTION 12.0 DATA VERIFICATION
 
12.1 INTRODUCTION
 
Verifying data collected by companies prior to Coral Resources (1986-1989) is nearly impossible due to a lack of documentation. However, it is possible to make a judgment regarding the E & B Exploration and portions of the Coral Resources databases. While details regarding drilling, sampling, sample prep and assay procedures are unavailable, the fact that both companies employed reputable assay labs for their analytical work suggests that the assays data is of good quality. An exception is the assay data of Coral Resources reported during a portion of 1988 and all of 1989, when Coral prepared and analyzed their own samples on site. The Coral assays produced during this period lack documentation and have been shown to be unreliable and should be excluded from use in resource estimates.
 
Data verification was undertaken by Amax during evaluation of the Porphyry Zone resource. MRDI (Mineral Resource Development, Inc., of San Mateo, CA) was responsible for verification of Amax’s methodology used to verify the quality of analytical data used in their evaluation at the Robertson Property (1994 Amax feasibility study). It was the opinion of MRDI that the methodology used is appropriate in the context of the evaluation being considered and that the work performed by Amax meets or exceeds industry standards.
 
12.2 DATA VERIFICATION OF AMAX DRILL SAMPLE RESULTS
 
The Amax primary labs were the Monitor facility in Elko, NV and the Bondar-Clegg facility in Vancouver, B. C. The Chemex Labs of Vancouver, B. C. was chosen as the secondary (umpire) lab facility.
 
The primary labs prep facilities were responsible for preparing course “rig” duplicate samples, coarse blank samples and for inserting the Amax supplied standard reference materials into the sample stream. The standard reference material was prepared by Amax as part of an internal, company-wide program that supplied reference material for all Amax sampling programs. The standards are highly reliable and were routinely monitored by Amax. Once the drill samples were reduced to pulp samples ready for assay, the Amax standards (pulps) were inserted by the lab in pre-numbered sequence with the other pulps and assayed sequentially.
 
In addition, Amax was supplied with and monitored the analytical results of the primary and secondary labs own internal QA/QC controls for sample batches.
 
Amax routinely (6% of all samples) submitted pulp samples prepared by the primary lab to the umpire lab for gold assay. Less frequently, coarse (-10 mesh) reject material was submitted to the umpire lab for preparation and analysis. The primary lab was responsible for shipping all samples to the umpire lab.
 
A complete summary of the verification of analytical data developed by Amax during their evaluation of the Porphyry Zone inferred mineral resource (1994 feasibility study) was previously reported in the NI 43-101 compliant technical report Mineral Resource Estimate for the Robertson Property, Lander County, Nevada, USA (Stokes et al., 2008) available on SEDAR.
 
 
 
 
Coral Gold Resources Ltd. 12-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
12.3 CORAL GOLD DATA VERIFICATION OF RC DRILL SAMPLE RESULTS (2004-2006)
 
The Coral primary lab was ALS Chemex with sample prep facilities in Elko, NV and assay facilities in Reno, NV. McClelland Metallurgical Labs, Sparks, NV was used as the secondary (check) lab.
 
The ALS Chemex prep facilities was responsible for preparing coarse “rig” duplicate samples, coarse blank samples, coarse low-level gold samples, and for inserting the Coral supplied standard reference materials into the sample stream. The commercially available certified reference materials were supplied by CANMET and MEG. The standards are highly reliable and were routinely monitored by Coral. Once the drill samples were reduced to pulp samples ready for assay, the certified reference pulps were inserted by the lab in pre-numbered sequence with the other pulps and assayed sequentially.
 
In addition, Coral was supplied with and monitored the analytical results of ALS Chemex own internal QA/QC controls for sample batches.
 
The following statistical analysis were calculated by substituting the assay value <0.005 ppm Au (below analytical detection) with the value 0.004 ppm Au.
 
12.3.1 Summary of Verification-Drill Sample Results
 
To assess the ability of the primary and umpire labs to provide consistently accurate analytical results, their performance was monitored using standards, blanks and rig duplicate samples. A total of 11,918 drill samples were submitted to ALS Chemex for initial gold determination from 2004- 2006. In addition Coral submitted 1,727 control (14.5%) samples to monitor lab performance.
 
12.3.2 Certified Reference Pulps
 
Analytical results for the 178 (1.5 % of all samples) certified reference pulps submitted to ALS Chemex indicate that the average for all “certified” values was 2.535 ppm Au, versus the primary labs average value of 2.530 ppm Au. This is a relative difference of 0.005 ppm Au, or <1 percent lower than the mean of the certified values. A correlation coefficient of 0.973 was calculated for the pair. These results indicate that relative bias between the two data sets is absent. However, it should be noted that assay results of certified blank samples by ALS Chemex returned gold values ranging from <0.005 ppm Au up to 0.085 ppm Au. Of the 19 certified blank samples submitted, six samples returned values >0.005 ppm Au. This suggests a contamination or precision problem at the assay lab
 
12.3.3 Check Assays
 
Check assays on the 2004-2005 pulps prepared by the primary lab were performed on 207 (1.7% of all samples) samples. The average value from the initial assay was 1.544 ppm Au versus the average value from the check assay of 1.544, essentially no difference between the mean of both values. However on a sample by sample comparison, results between the two data sets (average values) varied from 0.027 ppm to 0.116 ppm. A correlation coefficient of 0.998 was calculated for the data pairs. These results indicate very good analytical reproducibility by the primary lab.
 
 
 
Coral Gold Resources Ltd. 12-2 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Check assays on the 2006 assays were performed on 604 (5.1% of all samples) coarse reject samples which were made into 25 composite samples for metallurgical testing. The average value from the initial assay of the 604 samples was 1.94 ppm Au versus the average value from check assays which was 1.65 ppm Au, a difference of 0.29 ppm (14.9%). A correlation coefficient of 0.9802 was calculated for the data pairs. A comparison of the initial (ALS) assay versus the check assay (RMG) results indicates that on average the initial assays are higher than the corresponding check samples. On a sample by sample comparison, results between the two data sets (average values) varied from 0.10 ppm to 0.84 ppm. These results suggest that either the initial determinations are biased high or the check sample assays are biased low. In addition problems with analytical reproducibility (precision) or coarse gold may also be present. To assess these issues, assay results from both labs were compared with the head grades calculated from 2,000 g cyanide leach tests. The average initial assay value for the individual 25 composite samples were compared with the average grade for the calculated head grade and plotted on a scatter diagram shown in Figure 12-1. With the exception of a single sample pair, the data are in excellent agreement and show no systematic bias. The average for the initial assays is 1.94 ppm versus 1.92 ppm for the calculated head grade, a difference of 0.02 ppm or 1.03% of the average initial assay value. However, a comparison of the average check assay value for each of the 25 composite samples with the calculated head grade, shown in Figure 12-2, indicates a systematic low bias for the check assays versus the calculated head grade. The average value for all check assays is 1.65 ppm versus 1.92 ppm for the calculated heads, a difference of 0.27 ppm or 16.4% of the average check assay value. These comparisons support the conclusion that no apparent bias exists between the initial assays performed by the primary lab and the calculated head grades. They also indicate that the check assays performed by a secondary lab are on average lower than either the initial assay or the calculated head grade. A correlation coefficient of 0.9658 was calculated for the initial assays versus the calculated head grade and 0.9389 was calculated for the check assays versus the calculated head grade. These correlations also suggest bias between the check assays and the calculated head grades.
 
12.3.4 Rig Duplicate Samples
 
The “rig” duplicate samples taken from reject material at the drill rig, and submitted blind to the lab, were prepared and analyzed along with the routine drill samples. The primary lab prepared and analyzed 245 ‘rig’ duplicate samples (2.1% of all samples). The average value for the primary assay sample was 0.528 ppm Au and the average value for the “rig” duplicate assay was 0.544 ppm Au, a relative difference of 0.016 ppm Au, or 3.0 percent higher than the mean value for the primary sample. However, in several instances significant differences between 12 assay pairs were noted. The relative difference between these assay pairs ranged from 0.752 ppm to 10.1 ppm. Despite the high variance between these samples, a correlation coefficient of 0.932 was calculated for the data pairs. These results indicate an overall very good reproducibility of the sample preparation and analytical procedures by the primary lab. While the variance between the four sample pairs is relatively large, it probably reflects the erratic nature of the gold distribution in the sample rather than poor sample preparation or analytical precision.
 
12.3.5 Coarse Blank and Low-Level Gold Samples
 
A total of 493 samples (4.1% of all samples) containing coarse blank material (<0.005 ppm Au) or coarse material containing trace levels of gold (< 0.005 to 0.025 ppm Au), were systematically introduced into the sample stream to assess the potential for introducing contamination during sample preparation. The average assay value for the 250 blank samples (sample CO-1 + CO-2) was 0.006 ppm Au and varied from <0.005 to 0.282 ppm Au. The average value for the 225 trace-level gold material (sample CV-1) was 0.01 ppm Au and ranged from <0.005 ppm to 0.646 ppm Au. An examination of the expected values for the blank and low-level samples as compared with assay results of the immediately preceding 3 or 4 samples indicates that no discernible contamination occurred during sample preparation. The 19 detectable gold values (>0.005 ppm) from the coarse blank samples might indicate low level contamination or a lack of precision at low level determinations. A more likely explanation is that the control blank samples occasionally contain low-level detectable gold. However, if two samples are removed (0.275 ppm Au and 0.282 ppm Au), the average grade for the blank control samples is <0.005 ppm Au. The low-level sample that returned 0.646 ppm Au, as well as the three samples above and below this sample, were re-assayed. Results indicate that the analyses were correct, but that the control sample was mixed up with the preceding sample on the assay report. This error was corrected on the certificate of assay and in the Coral database.
 
 
 
Coral Gold Resources Ltd. 12-3 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
12.4 CORAL GOLD DATA VERIFICATION OF DEEP RC DRILL SAMPLE RESULTS (2007)
 
The Coral primary lab for the 2007 RC drilling was ALS Chemex with sample prep facilities in Elko, NV and assay facilities in Reno, NV.
 
The ALS Chemex prep facilities was responsible for preparing coarse “rig” duplicate samples, coarse blank samples, coarse low-level gold samples, and for inserting the Coral supplied standard reference materials into the sample stream. The commercially available certified reference materials were supplied by MEG. The standards are highly reliable and were routinely monitored by Coral. Once the drill samples were reduced to pulp samples ready for assay, the certified reference pulps were inserted by the lab in pre-numbered sequence with the other pulps and assayed sequentially.
 
In addition, Coral was supplied with and monitored the analytical results of ALS Chemex own internal QA/QC controls for sample batches.
 
12.4.1 Summary of Verification-Drill Sample Results
 
To assess the ability of the primary lab to provide consistently accurate analytical results, their performance was monitored using certified reference pulps and rig duplicate samples. A total of 644 drill samples were submitted to ALS Chemex for initial gold determination from the 2007 drilling program. In addition Coral submitted 26 control (4.0%) samples to monitor lab performance.
 
12.4.2 Certified Reference Pulps
 
Analytical results for the 20 (3.1% of all samples) certified reference pulps submitted to ALS Chemex indicate that the average for all “certified” values was 1.047 ppm Au, versus the primary labs average value of 1.043 ppm Au. This is a relative difference of 0.004 ppm Au, or <1 percent lower than the mean of the certified values. A correlation coefficient of 0.997 was calculated for the pair. These results indicate that relative bias between the two data sets is absent.
 
12.4.3 Rig Duplicate Samples
 
The “rig” duplicate samples taken from reject material at the drill rig, and submitted blind to the lab, were prepared and analyzed along with the routine drill samples. The primary lab prepared and analyzed 13 ‘rig’ duplicate samples (2.0% of all samples). The average value for the primary assay sample was 0.111 ppm Au and the average value for the “rig” duplicate assay was 0.087 ppm Au, a relative difference of 0.024 ppm Au, or 21.6 percent lower than the mean value for the primary sample. However, in several instances a significant difference between 3 assay pairs was noted. The relative difference between these assay pairs ranged from 0.048 ppm to 0.350 ppm. Despite the high variance between these samples, a correlation coefficient of 0.993 was calculated for the data pairs. These results indicate an overall very good reproducibility of the sample preparation and analytical procedures by the primary lab. While the variance between the three sample pairs is relatively large, it probably reflects the erratic nature of the gold distribution in the sample rather than poor sample preparation or analytical precision.
 
 
 
Coral Gold Resources Ltd. 12-4 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
12.5 CORAL GOLD DATA VERIFICATION OF RC DRILL SAMPLE RESULTS (2008, 2010)
 
The Coral primary lab for the 2008-2010 RC drilling was ALS Chemex with sample prep facilities in Elko, NV and assay facilities in Reno, NV.
 
The ALS Chemex prep facilities was responsible for preparing coarse “rig” duplicate samples, coarse blank samples, coarse low-level gold samples, and for inserting the Coral supplied standard reference materials into the sample stream. The commercially available certified reference materials were supplied by MEG. The standards are highly reliable and were routinely monitored by Coral. Once the drill samples were reduced to pulp samples ready for assay, the certified reference pulps were inserted by the lab in pre-numbered sequence with the other pulps and assayed sequentially.
 
In addition, Coral was supplied with and monitored the analytical results of ALS Chemex own internal QA/QC controls for sample batches.
 
12.5.1 Summary of Verification-Drill Sample Results
 
To assess the ability of the primary lab to provide consistently accurate analytical results, their performance was monitored using certified reference pulps and rig duplicate samples. A total of 6,160 drill samples were submitted to ALS Chemex for initial gold determination from the 2008 and 2010 drilling programs. In addition Coral submitted 620 control samples (10.1%) to monitor lab performance.
 
12.5.2 Certified Reference Pulps
 
Analytical results for the 95 (1.5% of all samples) certified reference pulps submitted to ALS Chemex in 2008 indicate that the average for all “certified” values was 1.314 ppm Au, versus the primary labs average value of 1.262 ppm Au. This is a relative difference of 0.052 ppm Au, or 4.0 percent lower than the mean of the certified values. This large difference is due to a single sample pair for which the lab sample was 0.068 ppm Au versus 4.5 ppm Au for the certified value. A correlation coefficient of 0.950 was calculated for the set of pairs. If this sample pair is removed for the data, the average certified value is 1.280 versus 1.2075 for the average lab value, a difference of 0.005 ppm Au and a correlation of 0.999.
 
Analytical results for the 40 (<1% of all samples) certified reference pulps submitted to ALS Chemex in 2010 indicate that the average for all “certified” values was 1.426 ppm Au, versus the primary labs average value of 1.402 ppm Au. This is a relative difference of 0.024 ppm Au, or 1.6 percent lower than the mean of the certified values. A correlation coefficient of 0.999 was calculated for the set of pairs.
 
These results indicate that relative bias between the two data sets is absent.
 
 
 
Coral Gold Resources Ltd. 12-5 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
12.5.3 Rig Duplicate Samples
 
In 2008, the primary lab prepared and analyzed 125 ‘rig’ duplicate samples (2.0% of all samples). The average value for the primary assay sample was 0.404 ppm Au and the average value for the “rig” duplicate assay was 0.319 ppm Au, a relative difference of 0.085 ppm Au, or 21 percent lower than the mean value for the primary sample. However, in one instance a significant difference between a single assay pairs was noted. The relative difference between these assay pairs 4.69 ppm Au. Because of the high variance between these samples, a correlation coefficient of 0.831 was calculated for the data pairs. These results indicate an overall very good reproducibility of the sample preparation and analytical procedures by the primary lab. While the variance between the single sample pairs is relatively large, it probably reflects the erratic nature of the gold distribution in the sample rather than poor sample preparation or analytical precision.
 
Forty “rig” duplicate samples were analyzed by the primary lab in 2010. The average value for the primary assay sample was 0.265 ppm Au and the average value for the “rig” duplicate assay was 0.199 ppm Au, a relative difference of 0.071 ppm Au, or 26.8 percent lower than the mean value for the primary sample and a correlation coefficient of only 0.454. These results indicate a large variance between samples possibly due to poor sampling at the splitter. However, much of this large variance is mainly due to a single assay pair having a relative difference of 3.63 ppm Au. With these samples removed from the data, the relative difference between the two data sets is 0.028 ppm Au, or an 18 percent higher average for the duplicate assays over the initial assay sample and a correlation coefficient of 0.918.
 
12.5.4 Coarse Blank and Low-Level Gold Samples
 
In 2008-2010, a total of 320 samples (4.1% of all samples) containing coarse blank material (<0.005 ppm Au) or coarse material containing trace levels of gold (< 0.005 to 0.025 ppm Au), were systematically introduced into the sample stream to assess the potential for introducing contamination during sample preparation. The average assay value for the 233 blank samples (sample CO-1) was 0.006 ppm Au and varied from <0.005 to 0.246 ppm Au. Of the 233 “blank” control samples, 65 samples returned gold values between 0.005 ppm and 246 ppm with an average gold value of 0.013 ppm. The average value for the 87 trace-level gold material (sample CV-1) was 0.008 ppm Au and ranged from <0.005 ppm to 0.056 ppm Au. An examination of the expected values for the blank and low-level samples as compared with assay results of the immediately preceding 3 or 4 samples indicates that no discernible contamination occurred during sample preparation. The 65 detectable gold values (>0.005 ppm) from the coarse blank samples might indicate low level contamination or a lack of precision at low level determinations. A more likely explanation is that the control blank samples occasionally contain low-level detectable gold. However, if a single sample is removed (0.246 ppm Au), the average grade for the blank control samples is <0.005 ppm Au.
 
12.6 CORAL GOLD DATA VERIFICATION OF DDH SAMPLE RESULTS (2010)
 
The Coral primary lab for the 2010 core drilling was ALS Chemex with sample prep facilities in Elko, NV and assay facilities in Reno, NV.
 
The ALS Chemex prep facilities was responsible for preparing coarse blank samples, coarse low-level gold samples, and for inserting the Coral supplied standard reference materials into the sample stream. The commercially available certified reference materials were supplied by MEG. The standards are highly reliable and were routinely monitored by Coral. Once the drill samples were reduced to pulp samples ready for assay, the certified reference pulps were inserted by the lab in pre-numbered sequence with the other pulps and assayed sequentially.
 
In addition, Coral was supplied with and monitored the analytical results of ALS Chemex own internal QA/QC controls for sample batches.
 
 
 
 
Coral Gold Resources Ltd. 12-6 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
12.6.1 Summary of Verification-Drill Sample Results
 
To assess the ability of the primary lab to provide consistently accurate analytical results, their performance was monitored using certified reference pulps and coarse blank and low-level control samples. A total of 1,224 core samples were submitted to ALS Chemex for initial gold determination from the 2010 core drilling program. In addition Coral submitted 113 control samples (9.2%) to monitor lab performance.
 
12.6.2 Certified Reference Pulps
 
Analytical results for the 43 (3.5% of all samples) certified reference pulps submitted to ALS Chemex indicate that the average for all “certified” values was 0.982 ppm Au, versus the primary labs average value of 0.974 ppm Au. This is a relative difference of 0.008 ppm Au, or <1 percent of the mean of the certified values. A correlation coefficient of 0.997 was calculated for the set of pairs.
 
12.6.3 Check Assays
 
Check assays of the 2010 initial assay were performed using 17 composite samples composed of 281 coarse reject samples used for metallurgical testing. The average value from the initial (ALS) assay of the 17 composite samples was 0.89 ppm Au versus the average value from check (RMG) assays which was 0.86 ppm Au, a difference of 0.03 ppm (3.4%). A correlation coefficient of 0.7510 was calculated for the data pairs. A comparison of the initial assay versus the check assay results indicates that on average the initial assays are higher than the corresponding check samples (Figure 12-3). On a sample by sample comparison, results between the two data sets (average values) indicate that the initial assay values varied from 0.39 ppm lower to 0.72 ppm higher than the corresponding check assay. These results suggest that either the initial determinations are biased high or the check sample assays are biased low. In addition problems with analytical reproducibility (precision) or coarse gold may also be present. To assess these issues, assay results from both labs were compared with the head grades calculated from 1,000 g cyanide leach tests. The average initial assay values for the individual 17 composite samples were compared with the average grade for the calculated head grade and plotted on a graph shown in Figure 12-4. The average for the 17n initial assays was 0.89 ppm Au compared to 0.82 ppm Au for the calculated head grade, a difference of 0.07 ppm (7.9%). The 17 sample pairs have a correlation coefficient of 0.8314. A comparison of the average check assay value (0.86 ppm Au) for each of the 17 composite samples with the calculated head grade based on results from 17 bottle roll cyanide leach tests is shown in Figure 12-5. The two data sets have an average difference of 0.04 ppm (4.6%) and a correlation coefficient of 0.9162, indicating relatively good agreement. Although the check assays are on average higher that the calculated head grades, the variance ranges from 0.18 ppm lower to 0.22 ppm higher values for the check assays. These comparisons support the conclusion that assay results from ALS exhibit an overall slightly higher bias verses either the check assays or the calculated head grades for the 17 composite samples.
 
 
 
Coral Gold Resources Ltd. 12-7 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
12.6.4 Coarse Blank and Low-Level Gold Samples
 
A total of 70 samples (5.7% of all samples) containing coarse blank material (<0.005 ppm Au) or coarse material containing trace levels of gold (< 0.005 to 0.040 ppm Au), were systematically introduced into the sample stream to assess the potential for introducing contamination during sample preparation. The average assay value for the 36 blank samples (sample CO-1) was 0.005 ppm Au and varied from <0.005 to 0.015 ppm Au. Of the 36 “blank” control samples, 14 samples returned gold values between 0.005 ppm and 0.015 ppm with an average gold value of 0.007 ppm. The average value for the 34 trace-level gold material (sample CV-1) was 0.011 ppm Au and ranged from <0.005 ppm to 0.040 ppm Au. An examination of the expected values for the blank and low-level samples as compared with assay results of the immediately preceding 3 or 4 samples indicates that no discernible contamination occurred during sample preparation. The 14 detectable gold values (>0.005 ppm) from the coarse blank samples might indicate low level contamination or a lack of precision at low level determinations. A more likely explanation is that the control blank samples occasionally contain low-level detectable gold.
 
12.6.5 Comparison of Twin DDH and RC Assay Results
 
An objective of the 2010 core drilling program was to evaluate the potential for down hole contamination and verify assay results from a series of RC holes drilled in 2008. This was accomplished by twinning 11 existing RC holes with HQ-diameter core which produced 960 sample pairs (1,920 samples) from the two sets of twinned holes. To test the effectiveness of RC drilling to return representative gold assays, the global average grades from the twinned RC holes were compared with the global average grades returned from the corresponding DDH. The results are shown in Table 12.1 and a plot of results is in Figure 12-1. The global average grade for all twinned RC holes is 0.011 ozAu/t compared with a global average grade for all corresponding core holes of 0.0107 ozAu/t, relative difference of 0.0003 ozAu/t (<1% of both mean values). Correlation between the twinned RC and cores ranged from 0.0271 to 0.7116, indicating mostly poor short range correlation between the holes which were spaced between 4 ft and 17 ft apart. By removing the top one percentile from the data, an average global average grade of 0.010 ozAu/t for the RC holes and 0.0095 ozAu/t for the core holes results, which is a difference of 0.0005 ozAu/t.
 
Table 12.1: Comparison of global average grades between twin core and RC holes
 
Core Hole
RC Hole
Average Grade
Core, ozAu/t
RC, ozAu/t
CC10-1
CR08-37
0.0098
0.0102
CC10-2
CR08-32
0.0061
0.0074
CC10-3
CR08-31
0.0128
0.0112
CC10-4
CR08-30
0.0122
0.014
CC10-5
CR08-29
0.0101
0.0089
CC10-6
CR08-27
0.0134
0.0125
CC10-7
CR08-26
0.0135
0.011
CC10-8
CR08-25
0.011
0.0084
CC10-9
CR08-21
0.0099
0.0126
CC10-10
CR08-19
0.0084
0.0119
CC10-12
CR08-18
0.0095
0.0117
All core
All RC
0.0107
0.011

When the twinned RC hole and corresponding core holes are compared on a grade zone basis, as defined by 0.010 ozAu/t cutoff grade and at equal elevation, the average grades are 0.0225 ozAu/t and 0.232 ozAu/t, respectively. Table 12.2 is a summary comparing selected 0.01 ozAu/t grade zones in the twinned RC and core holes. As shown in Table 14.2, the average difference between the twinned RC and DD holes is 0.0027 ozAu/t. While the thickness of grade zones varies from 5 ft to 110 ft, the average thickness indicates that the RC grade zones are on average 5 ft thicker.
 
 
 
Coral Gold Resources Ltd. 12-8 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Table 12.2: Comparison of twinned RC/DDH > 0.01 ozAu/t grade zones.
 
Twin Hole ID
Interval
thickness (ft)
Grade
ozAu/t
DD grade
diff. (ozAu/t)
DD thickness
diff. (ft)
CC10-1
140
0.022
0.002
+5
CR08-37
135
0.020
   
CC10-3
180
0.026
0.008
+10
CR08-31
170
0.018
   
CC10-4
150
0.0225
-0.0005
-10
CR08-30
160
0.023
   
CC10-5
105
0.023
0.002
+25
CR08-29
80
0.021
   
CC10-6
265
0.019
0.0002
+110
CR08-27
155
0.0188
   
CC10-7
90
0.038
0.016
-40
CR08-26
130
0.020
   
CC10-8
80
0.019
0
-10
CR08-25
90
0.019
   
CC10-9
125
0.0184
0.0004
-80
CR08-21
205
0.018
   
CC10-10
145
0.0179
-0.0096
-10
CR08-19
155
0.0275
   
CC10-12
80
0.0258
0.0112
-5
CR08-18
85
0.037
   
Ave diff.
   
0.0027
-5
 
To evaluate potential for down hole contamination a comparison was made of the depth at which individual grade zones start and end in the twinned RC and corresponding core holes. The elevation difference between the top of grade zones in the twinned RC versus the core holes ranges from 0 to 40 ft with grade zones in the core starting an of average 20 ft higher. It should be noted that that all of the twinned RC holes had 10 ft of casing installed using open-hole rotary methods which results in generally poor sample quality. Also poor core recovery in the upper 20 ft of most the 2010 core holes resulted in small or no samples.
 
 
 
 
Coral Gold Resources Ltd. 12-9 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
12.7 AUTHORS DATA VERIFICATION
 
As project manager for Amax during the time period 1990 through 1994 and a supervising Qualified Person for Coral Gold (2004-2010), the author was primarily responsible for developing, implementing and monitoring the QA/QC program employed by Amax and Coral Gold at the Robertson Property. These results verify the adequacy and effectiveness of these QA/QC programs, and justify a high level of confidence in the analytical data generated by Amax and Coral Gold used in the evaluation of the Robertson project.
 
It should be noted that although the overall quality of the assay data from the primary lab appears to be good, results reported by the check labs are, on average, lower than either the initial assay or calculated head grade for the same sample. This appears to be the result of a systematic low bias introduced during the check assay process or during the AA determination. A comparison of all (2004-2010) assays of certified reference pulp with the primary lab assay results indicates a consistent low bias in the primary lab assays. In addition, the primary lab reported a number of inconsistent gold determinations for samples at or below the lower limit of detection (0.005 ppm), possibly indicating a lack of analytical precision at lower levels of gold detection.
 
 
 
Coral Gold Resources Ltd. 12-10 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
These results indicate that down hole contamination during RC drilling is minimal. This is confirmed by the twin core holes drilled by both Amax (1994 feasibility study) and Coral (2010) that there is no evidence of down hole contamination and the differences in global average grades between the twinned RC and core holes are well within acceptable limits.
 
An additional concern is the high variability between the initial lab assay and the “rig” duplicate assay. This is usually due to significant differences between just one or two sample pairs. However, when compared on a sample by sample basis the gold values from both data sets are in “relative” agreement. Elevated gold values in the initial assay data set are usually mirrored by similarly elevated values in the duplicate sample set and low values are likewise mirrored. The variance is likely due to natural short range variability in gold distribution and sampling methodology.
 
While the author has no first-hand knowledge of the QA/QC program employed by Cortez during their 1999 evaluation of the Robertson Project, it is the author’s opinion that as a mining industry leader, they employed a program which was adequate to justify a high level of confidence in the analytical data generated.
 
Comparison of Global Average Grades of Twin Core vs RC Dril Holes
 
 
 
 
 
Coral Gold Resources Ltd. 12-11 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
 
Coral Gold Resources Ltd. 12-12 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
 
 
Coral Gold Resources Ltd. 12-13 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
 
 
Coral Gold Resources Ltd. 12-4 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
SECTION 13.0 MINERAL PROCESSING AND METALLURGICAL TESTING 13.1 INTRODUCTION
 
The Robertson Property has six mineralized zones (resources) or deposits and one mined out deposit with the following names:
 
· Porphyry;
· 39A;
· Distal;
· Altenburg Hill;
· Gold Pan;
· Triplet Gulch;
· and the mined out Tenabo Gold Quartz Deposit.
 
Historical metallurgical studies have indicated that the Porphyry, Altenburg Hill and the near surface zone of the Gold Pan and 39A are amenable to heap leach treatment. The Porphyry deposit process response is the best understood. In 2011 a laboratory program was undertaken at McClelland Laboratories in Sparks, Nevada to provide further leaching data for samples originating from the Altenburg Hill and Gold Pan deposits, and included some low grade samples which were labeled as overburden.
 
An overview of the historical test work performed on the property, followed by a description and results summary of the 2011 laboratory program are provided below.
 
13.1.1 Historical Studies
 
Of the six resources and deposits identified at Robertson, the Porphyry has had most of the previous test work performed on it as it was the subject of a feasibility study by Amax Gold in 1994. Its metallurgical characteristics are better defined than the other deposits. Its test program can be classed as detailed, while the others are more preliminary in nature. No documentation on the metallurgical characteristics of the Triplet Gulch Deposit was available and it is not known if such work was carried out in the past.
 
Details of the metallurgical testwork performed on each of the remaining mineralized zones or deposits together with the names of the laboratories that undertook the work are provided below summarizing work done from the late 1980’s to 2007.
 
 
 
Coral Gold Resources Ltd. 13-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
13.1.1.1 Gold Quartz Deposit
 
According to Mr. Bob McCusker, the Tenabo Gold Quartz Deposit has been mined out and is on longer relevant to the current evaluation of the Property but the historical metallurgical testwork and process information have been included for the record of this report as this deposit is close to the Gold Pan Deposit.
 
In 1981, the Miller-Kappes Company performed 14 cyanide leach tests. Two of the samples were from the small open pit (glory hole) and waste dumps in the original Gold Quartz mine. One was taken near the iron stained area of the north rim and the other from a low grade zone from the west end of the pit. The other twelve were from an existing ore heap and were taken by back-hoe trenching.
 
All samples were crushed to minus 5/8” and a 50lb split was used for testing. Leach solution ranging from 0.3 to 0.9 g/L cyanide and pH 9.5 to 10.7 was slowly dripped from a head tank to a column containing the crushed ore sample. Pregnant solution draining from the column reported to a bottle containing activated carbon to adsorb the leached gold and silver values. The pit samples were leached for 101 days and the ore heap samples for 75 days. Lime and cyanide consumptions averaged 2.7 and 3lb/ton respectively.
 
Results of the tests are presented in the table 13.1 below:
 
Table 13.1: Cyanide Leach Tests
 
 
Gold Quartz Pit
Ore Heap
Weighted Average
Feed Grade (oz Au/t)
0.026
0.050
0.046
Leach Residue (oz Au/t)
0.004
0.009
0.008
Recovery to day 15
 
57.5
 
Recovery to day 27
83.6
   
Final Gold Recovery
87.9
77.3
78.8

 
In 1986, an additional column test by Kappes Cassidy and Associates using a 50kg of bulk ore sample of Tenabo ore was tested. The sample was crushed to minus 1 inch and placed in a 6 inch diameter column. Height of ore in the column was about 63 inches. Cyanide solution strength of 0.6g/L was dripped into the column for a period of 24 hours. The column was then left dormant for the following 24 hours. This 24 hour leach and rest cycle was maintained for the test duration of 40 days. The collected pregnant solution was passed through a bottle containing activated carbon before being returned to leach.
 
From the calculated head grade of 0.033oz Au/t, 75.7% was recovered in the first 7 days and 84.8% gold recovered in the 40 day test period. Lime consumption was 2.56lb/ton ore and the cyanide consumption was 1.35lb/ton.
 
Analysis of the screen fractions of the column feed showed the gold to be concentrated in the minus 1/4 inch fraction which comprised 35% of the weight and 86% of the gold. Recoveries of gold from the various fractions range from 50% in the plus 1/2 inch to 94% from the minus 65 mesh fraction.
 
An agitated cyanide leach test was also performed on a sample ground to 100% passing 100mesh. Based on a head grade of 0.036ozAu/t, the recovery was 94.7% in 24 hours of leach time. It was also reported that solution fouling by soluble copper would be minor.
 
Reference: Kilborn Engineering (B.C.) Ltd Coral Gold Corp. dated January 1989, Evaluation Report.
 
 
 
Coral Gold Resources Ltd. 13-2 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
13.1.1.2 Porphyry Oxide and Sulfide Resource (from McCusker 2006 NI 43- 101 report)
 
As part of a 1994 feasibility study of the Porphyry Zone resource, Amax conducted detailed metallurgical testing in three phases summarized below. Phase I testing was performed by AMAX Research and Development in Golden, CO and Phase II and Phase III testing were performed by McClelland Laboratories of Sparks, NV.
 
Phase I:   Preliminary bottle roll leach tests on 32 composite RC cuttings (assay rejects) at 10 mesh and 80 mesh. Composite samples represent a variety of oxidation states, gold grade and copper content.
     
Phase II:   Detailed column and bottle roll leach testing on 13 composite samples from PQ-diameter (3.3 inches) core, representing variable gold grade, oxidation state and cyanide soluble copper content. Used crush sizes of 1 1/2 inches and Y2 inch and grind sizes ranging from 10 mesh, 100 mesh and 200 mesh.
     
Phase III:   Bottle roll testing on 13 composite samples at Y2 inch and 100 mesh. Composite material is from 3 PQ-diameter core and RC cuttings from a new area within the Porphyry resource.
 
Phase I
 
Phase I results indicates gold extractions from thirty 10 mesh samples ranged from 60.9 percent to 96.9 percent. Extractions for the two 80 mesh samples achieved 35.3 percent and 50 percent. A summary of Phase I metallurgical testing is shown in Table 13.2.
 
Table 13.2: Summary of Phase I Metallurgical Test Results (AMAX R&D,1993)
 
 
*Average of 7 samples, average of 6 samples 0.63 lbs/ton.
 
Phase II
 
The purpose of Phase II testing was to obtain data for process design. Core composites were prepared using Amax interval compositing instructions. The 13 composites for columns, bottle roll and crushing tests were prepared by blending, coning and quartering each specified interval. All rejects from the coning and quartering of 1 Y2 inch material were crushed to 80 percent passing Y2 inch and were blended and split to obtain samples for testing the 10 mesh and finer sizes. A total of 337 intervals of core from five PQ-diameter diamond drill holes were used to develop the composite samples. Results of Phase II are summarized in Table 13.3.
 
 
 
Coral Gold Resources Ltd. 13-3 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Table 13.3: Summary of Phase II Metallurgical Test Results (McClelland, 1994)
 
Comp. Calc Head
Oxid. 
CN Sol 
Gold Extractions (%) Consumptions
(1/2” feed)
No.
Grade
%
Cu(lbs/t)
1 1/2 “ 1/2 “ 10m 100m 200m NaCN(lbs/t) Lime(lbs/t)
1
0.018
100
0.2
56.3
72.2
76.5
89.5
89.5
1.69
4.5
2
0.023
99
0.2
8.2
82.6
75.0
84.0
84.0
1.51
4.3
3
0.017
86
0.2
55.
75.0
73.7
88.9
89.5
1.36
4.5
4
0.028
99
0.4
51.7
N/A
78.3
92.6
93.1
N/A
N/A
5
0.024
58
1.53
38.1
54.5
72.0
92.3
92.0
2.57
5.0
6
0.035
100
1.27
44.8
N/A
81.3
93.9
97.1
N/A
N/A
7
0.031
98
0.3
N/A
72.4
83.3
93.9
93.9
2.92
5.3
8
0.038
89
7.33
36.4
51.2
31.6
26.3
29.7
12.0
111.3
9
0.032
97
2.07
24.1
50.0
3.1
82.1
79.2
3.33
5.2
10
0.017
6
0.4
33.3
53.8
75.0
93.3
93.8
1.58
3.8
11
0.040
0
0.4
N/A
39.1
61.9
86.5
92.3
1.17
2.4
12
0.111
100
0.2
N/A
N/A
68.3
92.6
94.0
N/A
N/A
13
0.119
58
2.20
N/A
N/A
60.0
79.0
80.5
N/A
N/A
 
Composite head grades were determined by conventional fire assays for gold and silver, triplicate gold metallic screen fire assays, multi-element ICP analysis, sulfur speciation, carbon speciation and cyanide soluble gold and copper shaker tests.
 
Bottle roll leach tests were conducted on 13 composites using 1 Y2 inch, Y2 inch, 10 mesh, 100 mesh and 200 mesh material to determine gold, silver and copper extractions and reagent sensitivity to ore feed size. Bottle roll tests were conducted over a period of 96 hours.
 
Column percolation leach tests were performed on 9 composites at feed sizes of 80 percent passing 1 Y2 inch and Y2 inch. The ore was charged into 10-ft-high columns with inside diameters ranging from 4 inches to 12 inches. The column leach tests were conducted over a period of 39 days to 53 days.
 
Results from Phase II testing indicate that gold extractions are highly sensitive to ore crush size. Since recoveries were markedly increased with a finer crush size, Amax chose a nominal Y2 inch crush size as the basis for their heap leach process design.
 
 
 
Coral Gold Resources Ltd. 13-4 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
13.1.2 Phase III
 
The purpose of Phase III testing was to obtain additional data on extensions of the Porphyry resource that were identified after Phase II testing had begun. Because of time constraints imposed by the November 1994 deadline for producing the feasibility study, only bottle roll leach tests were conducted during Phase III. The core intervals were prepared and assayed using the same protocols as were the Phase II samples. A total of 234 intervals from three PQ-diameter diamond drill holes, were made into 13 composite samples at crush sizes of 80 percent passing Y2 inch and 80 percent passing 100 mesh. Bottle roll procedures were the same as those used in Phase II and test results are summarized in Table 13.4.

Table 13.4: Summary of Phase III Metallurgical Test Results (McClelland, 1994)
 
Comp. Calc Head Oxid. CN Sol
Gold Extractions (%) 
Consumptions
(1/2” feed)
No. Grade % Cu(lbs/t) 1 1/2 1/2 “ 10m 100m 200m NaCN(lbs/t) 
Lime(lbs/t)
14
0.020
100
0.3
N/A
66.7
N/A
83.3
N/A
0.15
7.3
15
0.019
100
0.2
N/A
53.3
N/A
93.8
N/A
0.85
4.1
16
0.025
100
0.2
N/A
72.4
N/A
96.0
N/A
0.28
6.3
17
0.025
91
0.4
N/A
78.3
N/A
96.6
N/A
0.92
9.3
18
0.018
98
0.2
N/A
65.0
N/A
85.7
N/A
0.24
7.6
19
0.034
100
0.2
N/A
51.3
N/A
92.5
N/A
0.90
4.7
20
0.131
100
0.2
N/A
51.7
N/A
93.4
N/A
0.21
10.2
21
0.023
88
0.6
N/A
50.0
N/A
94.7
N/A
0.63
5.9
22
0.800
95
6.0
N/A
41.2
N/A
57.5
N/A
9.12
8.3
23
0.174
50
0.6
N/A
20.9
N/A
30.8
N/A
27.02
109.3
24
0.076
73
1.8
N/A
30.8
N/A
94.0
N/A
2.6
4.3
25
0.038
5
6.0
N/A
43.2
N/A
89.4
N/A
4.97
19.0
26
0.051
8
0.2
N/A
20.0
N/A
92.2
N/A
1.79
4. 3
 
The culmination of the Amax and McClelland metallurgical testwork studies resulted in MRDI proposing a 17000tpd heap leach operation with relocated crushing, screening and conveying equipment from the Sleeper Mine in the feasibility study. Ore was to be crushed to minus 1/2” and conveyed to the leach pad. The projected gold recovery at this crush size was 67% for both the oxide and sulfide resources. Carbon columns were proposed for treating the gold bearing pregnant solution from the heap and a copper strip using cyanide to remove copper from the loaded carbon was included in the flowsheet. The resulting loaded carbon after copper removal was then shipped to the Sleeper mine for toll processing of the gold.
 
Following the Amax feasibility study, there has been no additional drilling or metallurgical testwork on the Porphyry deposit. Optimization of the crush size ie 10 mesh in a column test and other means for dealing with the soluble copper minerals and the resulting high cyanide consumption needs further work. In the Amax feasibility study, the conclusion was made that the tonnage of ore with high soluble content was small compared to the overall tonnage of the mineable ore, hence it was not considered to be a big operating problem for the plant.
 
 
 
Coral Gold Resources Ltd. 13-5 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
13.2 GOLD PAN, ALTENBURG HILL AND 39A RESOURCES
 
In 1996, McClelland Labs of Sparks, NV conducted metallurgical studies on shallow oxide and mixed oxide/sulfide material from the Gold Pan Zone (composites 1-7, 17-19), oxide material from Altenburg Hill Zone (composites 8-11) and ore-grade sulfide material from the 39A Zone (composites 12-16, 20-22). These studies included 40 direct agitation cyanide leach tests (bottle rolls) using various grind sizes on all the samples; 11 bulk sulfide flotation tests on the Gold Pan and the 39A sulfide resource and 5 column percolation leach tests on the Gold Pan and Altenburg Hill samples. Composites samples were prepared and analyzed in the same manner as describe above in Phase II of the Amax study.
 
Samples for testing consisted of 9 composites (1-9) derived from 135 five-foot-intervals from drill core, 10 composites (10-19) from RC cuttings and 3 composites (20-22) from pulverized drill core assay reject samples. Bulk sulfide flotation tests were conducted on selected composites at a nominal 35 mesh. Results from these tests are summarized in Table 13.5. Direct agitated cyanidation (bottle roll) tests were conducted on all 22 composites at feed sizes of 80% - 11/2 “, 80% -1/2”, 80% -35M, 80% -10M and 80-95% -200M. Results of these tests are reported in Table 13.5. Column percolation leach tests were conducted on drill core composites 2, 4, 6, 8, and 9 at a feed size of 80% -1/2”. Results from these tests are summarized in Table 13.7.
 
As shown in Table 13.5, the selected composites tested generally respond well, except for composite 1, to beneficiation using conventional flotation methods at 35 mesh grind size. Gold recovery in the cleaner concentrates achieved by flotation for the remaining composites at 35 mesh feed size ranged from 74.3 to 88.1 percent. A single flotation test was conducted using – 200M feed size resulted in lower gold recovery probably due to the oxidation products formed during grinding prior to flotation. In general the flotation results improved with depth for the Gold Pan and the 39A in fill samples. Flotation was not performed on the Altenburg Hill samples.
 
Table 13.5: Summary of Bulk Sulfide Flotation Test Results (McClelland, 1996)
 
 
(1) Recovered in the cleaner concentrate.
 
As summarized in Table 13.6, bottle roll tests conducted on the drill core composite samples (1- 9) averaged only 45.0 percent gold recovery using 80 percent –1/2 inch feed size. Crushing these composites to 80 percent –10 mesh improved gold recoveries significantly, averaging 71.2 percent. Also a comparison of composite samples used in the column leach tests with the corresponding –1/2 inch feed bottle roll composites, indicates that the column tests achieved significantly higher gold recoveries than the bottle roll tests (60.8 % vs. 45%). The higher column recoveries were probably on account of the 40 or more days of leach time vs 4 days for the bottle roll tests.
 
RC cuttings composites (10-19) from the Gold Pan, Altenburg Hill and 39A were amenable to direct agitation cyanidation treatment at the “as received” nominal 10M feed size. Gold recoveries varied from 42.9 to 78.8 percent and averaged 59.9 percent.
 
Drill core assay reject composite samples (20-22) from the 39A were readily amenable to direct agitated cyanidation treatment at the “as received” approximately 95 percent –35M feed size. Gold recoveries from these samples were 94.7, 91.2 and 93.2 percent, respectively and were only slightly improved by grinding to 80 percent –200M.
 
 
 
Coral Gold Resources Ltd. 13-6 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Table 13.6 Summary of Bottle Roll Test Results (McClelland, 1996)
 

Leach time for all bottle roll tests 4 days.
* Feed size as received drill cuttings nominally 35M.
** Feed size 95% -35M.
 
 
 
 
Coral Gold Resources Ltd. 13-7 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
As summarized in Table 13.7, composite 1 was readily amenable to simulated heap leach cyanidation treatment at 80 percent –1/2 inch feed size, achieving 84.3 percent gold recovery in 40 days. Composite samples 6, 8, and 9 were moderately amenable to heap leach treatment at 80 percent –1/2 inch feed size. Gold recoveries from those composites were 65.0, 53.8, and 60.0, respectively. Longer leaching cycles are likely to improve gold recoveries slightly. Cyanide consumptions were generally low and lime added to ore charges prior to leaching was sufficient to maintain protective alkalinity. The column tests were performed on the Gold Pan and the Altenburg Hill samples only.
 
Table 13.7: Summary of Column Leach Test Results (McClelland, 1996)
 
 
Results from the cyanide leach tests carried out by Amax (1993-94) indicate that oxidation and cyanide soluble copper content are the most important geological variables affecting process operating costs. Generally, greater oxidation of ore-grade material results in a higher gold extraction. The cyanide soluble copper content (average 185 ppm) does not present gold recovery problems, but does slow the rate of gold extraction and results in higher reagent consumption. From the process side, gold extractions are highly influenced by crush size. For the purposes of process scoping studies used in the 1994 Feasibility Study, a nominal 1/2 inch crush size, 1.1 pounds/ton of NaCN and 3.0 pounds/ton of lime were used to design optimal heap leach recovery. Heap recoveries were estimated to be 72 percent for oxide ore, 67 percent for mixed oxide ore, and 60 percent for sulfide ore, with an overall recovery estimated to be 67 percent.
 
Results from preliminary metallurgical testing carried out on behalf of Amax (1996) on drill samples from the Gold Pan, Altenburg Hill and the 39A Zone mineral resources indicate that most of the composite samples tested respond well to bulk sulfide flotation at 35 mesh and direct agitation cyanide leach tests at 10M feed size. In addition, four of the five composite samples used in the column leach tests are amenable to heap leaching at 80 percent –1/2 inch. Three of 10 composite samples from CAT-60 drilled in the Gold Pan Zone respond poorly to direct agitation at all feed sizes suggesting possible encapsulation and (or) mineralogical problems. Similar results were returned from CAT-62 drilled on the far west edge of the Altenburg Hill resource. The poor results retuned from these two holes negatively impacted the overall metallurgical studies. It should also be noted that 63 percent of all 1996 metallurgical tests were on composite samples from only three core holes, CAT-60 through CAT-62. These holes are unlikely to be representative of the mineral resources from which they were obtained and results should be viewed as very preliminary in nature.
 
 
 
Coral Gold Resources Ltd. 13-8 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
13.3.1 Distal, 39A and Altenburg Hill
 
The 2007 laboratory metallurgical test program was also conducted by McClelland Labs of Sparks, Nevada. This program was started in late 2006 and completed in 2007.
 
The samples tested were assay rejects from the 2006 RC drill cuttings. The 2006 exploration program focused on the 39A, Distal and Altenburg Hill deposits.
 
The 39A composites tested consisted of high and low grade composites. The low grade composites were further broken down into shallow near surface mineralization and deep low grade mineralization.
 
The Distal composites were considered deep while the Altenburg Hill composites shallow for the laboratory testing methods.
 
The shallow composites were tested for heap leach amenability whiles the deep for whole ore milling followed by cyanidation and whole ore milling followed by flotation. For the high grade composites, gravity was included in the test procedure in addition to whole ore milling and flotation.
 
In total, 25 RC drill cuttings composites were tested. There were 5 high grade samples (designated HG1 to 5), 2 low grade shallow (LG1 and LG2) and 4 low grade deep (LG3, 5,6 and 7) from the 39A; 5 from the Distal and 9 from the Altenburg Hill deposits.
 
13.3.2 Sample Selection and Composite Make-up Information,
 
The sample selection and composite make up was based on processing criteria. For the shallow near surface deposits, the preferred process specification for testing was its amenability to heap leaching while for the deeper mineralized zones, testing was focused on whole ore treatment.
 
The mineralized zones were identified from the drill logs and if the grade and location from surface were on interest for testwork, the drill hole and intercepts were noted for those sample intervals to be set aside for metallurgical testing. In total there were 25 composites selected for this program. The composite make-up information together with the drill hole numbers, the lab received weights and the sample preparation procedure are provided in McClelland 2007 report. The drill intercepts used can be found in the drill logs and assay report.
 
A composite from Hole CR-06-26 was selected as an extra for testing as it represented the northern-most hole in the 39A zone to return interesting grade material.
 
Another composite from Drill Hole CR-06-09 was proposed for testing but the wrong sample numbers were shipped. Hence testing of this composite was omitted from this program.
 
 
 
Coral Gold Resources Ltd. 13-9 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
13.3.3 Laboratory Test Conditions
 
13.3.3.1 Gravity Procedure
 
This procedure was used on the five high grade composites only. Each sample (10 kg) was stage ground, using a lab ball mill to 80%-75um in size. Each milled sample was subjected to gravity concentration by passing once through a Knelson (KC-MD3) concentrator. The resulting gravity rougher concentrate was cleaned once by hand panning to produce a gravity cleaner concentrate and gravity cleaner tailings. The gravity cleaner concentrate was dried, weighed and assayed to determine gold content. The gravity cleaner tailings and the gravity rougher tailings were each dried and weighed, and the tailings weight distributions were calculated. Each of the gravity cleaner tailings samples and the gravity rougher tailings samples were blended and split to obtain properly weighted samples for reconstituting a 2.5kg recombined gravity tailings sample for flotation testing. The splits from each sample were recombined, and used as feed for a batch flotation test.
 
13.3.3.2 Bulk Sulfide Flotation Test Procedures and Conditions
 
The bulk sulphide flotation test procedure was used on the recombined gravity tailings and on splits of whole ore from the 39A deep composites and the Distal composites. The whole ore samples were staged ground to 80% -75 microns in a laboratory steel ball mill while the recombined gravity tailings were subjected to a polishing grind of 2 minutes in a lab steel mill.
 
Flotation was conducted using a Denver laboratory scale flotation unit at 1200rpm. The ground pulp was slurried with water to achieve 30 weight percent solids and conditioned for 10 minutes with 0.25kg/t CuSO4. Flotation was conducted in 5 stages with incremental additions of 0.005kg/t of each PAX, Aero 208 and 3477 promoters. Total addition of each reagent was 0.025kg/t ore. Aerofroth 65 was used as a frother. The pulp was floated at natural pH. The 5 stages of concentrate were combined into a rougher concentrate. The rougher concentrate was cleaned once to produce a cleaner concentrate and cleaner tail. No additional reagents were added during cleaner flotation. The two float products were dried, weighed and assayed to determine precious metal content. The rougher tails were dried, weighed and assayed directly in triplicate to determine residual precious metal content.
 
13.3.3.3 Direct Agitated Cyanidation Test Procedures and Conditions
 
Direct agitated cyanidation (bottle roll) tests were conducted on all 25 composites to determine gold recovery, recovery rate and reagent requirements. Tests were conducted on the 39A low grade shallow composites (LG1 and LG2) and on all nine Altenburg Hill composites at the received (nominal 1.7mm) feed size to determine amenability to heap leach cyanidation treatment. Tests were conducted on the 39A high grade composites, 39A low grade deep composites and the Distal composites at an 80% - 75 micron feed size to determine amenability to milling/cyanidation treatment.
 
The 75 micron feeds were stage ground using laboratory steel ball mills. Ore charges were mixed with water, or settled in grinding water, to achieve 40 weight percent solids. Natural pulp pHs were measured. High calcium hydrated lime was added to adjust the pH of the pulps to 11.0 before adding the cyanide. Sodium cyanide, equivalent to 1.0g NaCN/L of solution was added to the alkaline pulps.
 
 
 
Coral Gold Resources Ltd. 13-10 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Leaching was conducted by rolling the pulps in bottles on the laboratory rolls for either 96 hours (as-rec’d feeds) or 72 hours (75 micron feeds). Rolling of the as-received slurries was suspended briefly after 2, 6, 24, 48, and 72 hours to allow the pulps to settle so samples of pregnant solution could be taken for gold and silver analysis by AA methods. Pregnant solution volumes were measured and sampled. Cyanide concentration and pH were determined for each pregnant solution. Make-up water, equivalent to that withdrawn, was added to the pulps. Cyanide concentrations were restored to initial levels. Lime was added, when necessary, to maintain the leaching pH at between 10.8 and 11.2. Rolling was then resumed.
 
Leaching procedures for the 75 micron feeds were essentially the same, except that a 12 hour sampling interval was added and the 96 hour sampling interval was deleted. Slurry dissolved oxygen levels were also measured at each sampling interval. Measured D.O. levels generally were above 6.0 mg/L, and never were lower than 4.0 mg/L.
 
After 72 or 96 hours, the pulps were filtered to separate liquids and solids. Final pregnant solution volumes were measured and sampled for gold and silver analysis. Final pH and cyanide concentrations were determined. Leached residues were washed, dried, weighed, and assayed in triplicate to determine residual precious metal content.
 
13.3.4 Results
 
13.3.4.1 Gravity/ Flotation Results
 
Summary results of the gravity and flotation results are presented in Table 13.8:
 
 
 
 
Coral Gold Resources Ltd. 13-11 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
The five high grade composites from 39A responded very well to whole ore gravity concentration followed by flotation at a grind size of 80% passing 75 microns. Gold recovery by gravity after cleaning ranged from 38 to 68% and the combined gravity/flotation recovery ranged from 91 to 96%.
 
Gold values reporting to the flotation rougher concentrate represented between 29% and 54% (additional to gravity recoveries) of gold values contained in the ore.
 
Gravity cleaner concentrates ranged from 562 - 1,529gAu/t (16 - 45 ozAu/t). Flotation cleaner concentrate grades ranged from 49 - 133gAu/t (1.4 - 3.9 ozAu/t). Flotation rougher (final) tail grades ranged from 0.13 to 0.42gAu/t.
 
Gravity cleaner concentrate weights ranged from 0.16% to 0.30% of the ore weight. Flotation cleaner concentrate weights ranged from 0.59% to 4.63% of the ore weight. Flotation cleaner tails ranged from 1.7% to 2.8%. Combined concentrate weights ranged from 3.9% to 6.7% of the ore weight.
 
The low grade deep composites from the 39A and Distal deposits also responded well to whole ore milling with bulk sulfide flotation treatment at a grind size of 80% passing 75 microns.
 
The four from 39A provided rougher concentrate grades between 7 and 62 g Au/t with 3.7% to 9.2% of the feed weight and represented gold recoveries of between 89.4% and 96.0%. The five from Distal provided similar results with mass recoveries to the rougher flotation concentrate of 7.2% to 13.2%, assayed between 6 and 25g Au/t and represented gold recoveries of between 87% and 95%. Flotation cleaner concentrate grades ranged from 11 to 53g Au/t.
 
 
 
Coral Gold Resources Ltd. 13-12 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
13.3.4.2 Cyanidation Bottle Roll Results
 
These results are summarized and presented in Table 13.9:
 
Table 13.9: Summary Metallurgical Results - Bottle Roll Tests
 
Composite
Feed Size
Au
Recovery
%
Extracted
Tail
Calc'd
Head
Assayed
Head
NaCN
Cons.
Lime
Added
39A HG1 Comp
P8075um
98.7
6.22
0.08
6.3
5.47
0.08
0.9
39A HG2 Comp
P8075um
98.7
4.46
0.06
4.52
4.38
0.15
1
39A HG3 Comp
P8075um
97.9
2.81
0.06
2.87
3.17
0.12
1
39A HG4 Comp
P8075um
98.4
4.28
0.07
4.35
4.11
0.39
1
39A HG5 Comp
P8075um
97.4
4.45
0.12
4.57
5.09
0.31
1.2
                 
39A LG1 Comp
As Rec'd
(1.7mm)
93
0.8
0.06
0.86
0.4
<0.07
1.6
39A LG2 Comp
As Rec'd
(1.7mm)
91.8
0.67
0.06
0.73
0.8
0.08
2.2
39A LG3 Comp
P8075um
96.3
1.29
0.05
1.34
1.41
0.15
1.9
39A LG5 Comp
P8075um
92.6
0.5
0.04
0.54
0.54
0.08
1.3
39A LG6 Comp
P8075um
97.8
2.7
0.06
2.76
2.67
0.18
1.3
39A LG7 Comp
P8075um
97.8
1.82
0.04
1.86
1.55
0.1
1.1
                 
Distal Comp CR06-16
P8075um
78.9
1.38
0.37
1.75
1.29
0.37
3.2
Distal Comp CR06-17
P8075um
76.9
0.6
0.18
0.78
0.58
0.65
2.8
Distal Comp CR06-18
P8075um
93.7
4.17
0.28
4.45
1.85
0.51
2.6
Distal Comp CR06-18
P8075um
91.6
4.38
0.4
4.78
1.85
0.38
2
Distal Comp CR06-20
P8075um
87.7
2.22
0.31
2.53
1.83
0.39
2.3
Distal Comp CR06-26
P8075um
92.5
1.47
0.12
1.59
1.88
0.46
2
                 
Altenburg Hill Comp CR 06-30
As Rec'd
(1.7mm)
76.4
0.68
0.21
0.89
0.52
0.26
2.1
Altenburg Hill Comp CR 06-34
As Rec'd
(1.7mm)
60.8
0.31
0.2
0.51
0.26
0.3
1.9
Altenburg Hill Comp CR 06-35
As Rec'd
(1.7mm)
73.3
0.33
0.12
0.45
0.23
0.15
2.1
Altenburg Hill Comp CR 06-36
As Rec'd
(1.7mm)
68.8
0.33
0.15
0.48
0.5
0.08
1.8
Altenburg Hill Comp CR 06-37
As Rec'd
(1.7mm)
66.7
0.5
0.25
0.75
0.42
0.23
1.8
Altenburg Hill Comp CR 06-38
As Rec'd
(1.7mm)
70.7
0.29
0.12
0.41
0.27
0.21
1.9
Altenburg Hill Comp CR 06-39
As Rec'd
(1.7mm)
58.9
0.99
0.69
1.68
1.18
0.1
1.7
Altenburg Hill Comp CR 06-40
As Rec'd
(1.7mm)
73.9
0.51
0.18
0.69
0.41
0.23
1.8
Altenburg Hill Comp CR 06-41
As Rec'd
(1.7mm)
54.3
0.25
0.21
0.46
0.24
0.15
2.3
 
 
 
 
Coral Gold Resources Ltd. 13-13 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
The 39A high grade composites were readily amenable to whole ore milling followed by cyanidation at a grind of 80% passing 75 microns. Gold recoveries ranged from 97% to 99% in 72 hours of leaching. Gold recovery rates were rapid and extraction was substantially complete in 24 hours. Reagent requirements were low. These results are comparable to the 1996 met test results from two core holes drilled in the 39A Zone. Head assay results showed that all the high grade composites contained less than 7 gAg/t ore.
 
The 39A low grade deep composites also responded favourably to whole ore milling followed by cyanidation at a grind of 80% passing 75 microns. Gold recoveries ranged from 93% to 98% in 72 hours of leaching. The behaviour of these composites is similar to the high grade composites where gold recovery rates were rapid and extraction was substantially complete in 24 hours. The reagent requirements were also low and there was good agreement between the calculated and the assayed head assays.
 
The 39A near surface composites were readily amenable to direct cyanidation treatment on the as received (approx. 1.7mm) feed size. Gold recoveries for LG-1 and LG-2 were 93% and 92% respectively in 96 hours of leaching. Gold recovery rates were rapid and the reagent requirements were low.
 
The Altenburg Hill composites also responded favourably to direct cyanidation treatment on the approximately 1.7mm feed size but the gold recoveries were lower than the 39A low grade composites. They ranged from 54% to 76%, and averaged 67% in 96 hours of leaching based on the calculated head. Gold recovery rates were moderate and a longer leaching cycle would improve recoveries. Reagent requirements were low. These results are similar to those obtained in 1996 met test results on the core and RC samples at the test size of 10mesh.
 
The Distal composites varied in their response to whole ore milling followed by cyanidation treatment at an 80% passing 75 microns feed size. Gold recoveries ranged from 77% to 94%, and averaged 87%, in 72 hours of leaching. Gold recovery rates were rapid, and extraction was substantially complete after 24 hours. Reagent requirements were low but were higher than for the 39A composites.
 
13.3.5 Summary of Historical Laboratory Studies
 
Metallurgical testwork completed to date suggests that the Porphyry, Altenburg Hill and the near surface deposits of the Gold Pan and 39A deposits are amenable to heap leach treatment. Optimization of the crush size would be required in future programs together with a column test on an overall or representative composite once the optimum crush size has been defined and selected.
 
No soluble copper problems were noted or identified in the 2007 test program as most reagent requirements in the cyanidation series of tests were low. The work suggests the Altenburg Hill and the 39A mineralized zones may not have as much soluble copper content as the Porphyry.
 
There are more processing options available for the deeper deposits of 39A and Distal. In addition to whole ore cyanidation where the best gold recoveries were achieved, these deposits are also amenable to flotation as well. Should the process selection lean towards heap leaching for the treatment of these two deep deposits, then there is the need to optimize the crush size in future test programs.
 
The 1996 test program on the Gold Pan deposit suggests that flotation is a viable process option for this deposit at depth with an increase in sulphide content. Further flotation work would be required for this deposit and the zone of oxidation from the sulphides better defined for the selection of test composites.
 
 
 
Coral Gold Resources Ltd. 13-14 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
There were several unusual observations noted when testing the Distal composites. Composite CR­06-18 used in the bottle roll cyanidation test had to be repeated due to an unusually high calculated head grade when compared to the assayed head grade and the calculated head grade form the flotation test. This test was repeated and provided a similar result with poor head assay agreement.
 
Composite CR-06-16 had a very high silver head assay of 8gAg/t compared to the other Distal composites of less than 5gAg/t. This abnormality was noted when the solution assays from the bottle roll tests were reviewed and compared to the other pregnant solution assays.
 
These two occurrences on the Distal composites suggests that there may be coarse gold and native silver in this deposit. In addition, the reagent requirements for the Distal were slightly higher than for the 39A. Mineralogy on the Distal is therefore highly recommended in any future test program and comparison should be made with those of 39A as these are deep deposits.
 
On the Altenburg Hill bottle roll cyanidation tests, the calculated heads in general were higher than the assayed heads. It is not known if this is a lab procedure issue or an assaying issue. Confirmatory testing for this series of tests would be recommended together with the longer leach time.
 
The flotation recoveries in general were slightly lower than the whole ore cyanidation results for the deep composites tested. Since the flotation tests were performed on RC drill cuttings, these flotation results could be slightly bias to the low side on account of surface oxidation of the sulphides. Confirmatory flotation tests with core drilling are better and should be considered in future test programs.
 
There is no documentation or reports on the metallurgical characteristics of the Triplet Gulch Deposit. Any future test program should include some preliminary work should this deposit become of interest for development.
 
13.3.6 2011 Laboratory Study
 
A laboratory program was performed in 2011 at McClelland Laboratories undertaken on samples obtained from the Altenburg Hill and Gold Pan deposits. The samples originated from continuous drill core intervals obtained during the 2010 exploration program. Portions of the samples were initially composited for use in bottle roll studies, followed by further re-blending of coarser material for column leach testing. A laboratory report by McClelland labs was not available at the time of issuing this report, but the interim resulting data is discussed below. A final laboratory report is expected by year end 2011 for this program.
 
13.3.6.1 Initial Composites
 
The initial samples were composited for use in bottle roll testing based on their location and head characteristics. Sample identification was based on a prefix AH for Altenburg Hill and GP for the Gold Pan deposit, followed by the drill hole number. Drill hole numbers and intervals used to make up the various composites will be included in the McClelland report expected to be issued in late December 2011. Based on head assays the material was classified as either oxide, partially (potentially) oxidized, or as sulfide material and identified respectively with a suffix OX, POX and SUL.
 
 
 
 
Coral Gold Resources Ltd. 13-15 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
There were eight oxide composites originating from Altenburg Hill, and two composites classified as partially oxidized from the Gold Pan deposit. Each was subjected to bottle roll testing. The corresponding head assays of these composites are provided in Table 13.10.
 
Table 13.10: Head Analyses Oxide and Partial Oxidized Composites
 
Composite
 
Au
   
Ag
   
Cu
   
ST
    S2-  
ID  
g/tonne
    oz/ton     ppm     ppm     %     %  
AH-CC10-3-OX
    0.68       0.020       1.5       460       0.02     0.02  
AH-CC10-4-OX
    0.96       0.028       5.5       760       0.03     0.02  
AH-CC10-5-OX
    1.1       0.032       2.4       636       0.02     0.01  
AH-CC10-6-OX
    0.66       0.019       1.4       396       0.01     0.01  
AH-CC10-7-OX
    1.37       0.040       5.1       1,425       0.02     0.01  
AH-CC10-8-OX
    0.72       0.021       3.1       548       0.01     0.01  
AH-CC10-9-OX
    0.69       0.020       1.7       372       0.01     0.01  
AH-CC10-10-OX
    0.73       0.021       3.7       1,495       0.18     0.14  
GP-CC10-13-POX
    1.9       0.055       7.5       577       0.60     0.03  
GP-CC10-15-POX
    0.34       0.010    
<0.5
      351       0.29     0.19  

 
The gold grades for these composites varied from 0.34 g/t to 1.9 g/t (0.010 oz/t to 0.055 oz/t). There was low associated silver, which increased slightly with a higher gold content. The copper content ranged from 350 to 1500 ppm. With one exception (AH-CC10-10-OX) the total sulfur content (ST) for the oxide material was less than 0.03%. Total sulfur content in the POX material was significantly higher, and a portion of these sulfides had been oxidized based on comparing total sulfur to the sulfide sulfur (S2-) analyses.
 
The initial metallurgical composites classified as sulfides are listed along with corresponding head analyses in Table 13.11.
 
Table 13.11: Head Analyses Sulfide Composites
 
Composite
 
Au
   
Ag
   
Cu
   
ST
    S2-  
ID   g/tonne     oz/ton     ppm     ppm     %     %  
AH-CC10-3-SUL
    0.74       0.022       2.0       1,110       0.63     0.50  
AH-CC10-4-SUL
    0.85       0.025       3.5       1,055       0.24     0.14  
AH-CC10-6-SUL
    0.54       0.016       2.0       532       0.44     0.32  
AH-CC10-8-SUL
    0.55       0.016       1.5       316       0.18     0.13  
GP-CC10-12-SUL
    0.86       0.025       2.6       638       1.89     1.65  
GP-CC10-13-SUL
    0.73       0.021       0.6       977       3.88     3.25  
GP-CC10-14-SUL
    0.63       0.018       1.0       507       1.88     1.68  
GP-CC10-15-SUL
    0.72       0.021       1.1       626       1.78     1.55  

Precious metal head grades for sulfide composites varied mid range as compared to the previous oxide samples with gold contents of 0.54 g/t to 0.86 g/t (0.016 oz/t to 0.025 oz/t). Copper grades were similar for both oxides and sulfides. For the sulfide composites the Gold Pan had significantly higher sulfur content than those of Altenburg Hill. Gold Pan and Altenburg composites had similar extent of oxidation based on the sulfide to total sulfur ratio.
 
 
 
Coral Gold Resources Ltd. 13-16 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
A final set of three composites was prepared on material with low gold grades and originating from rock that would be stripped or mined to access the ore. The sub-samples used for these composites were blended together based on anticipated gold grade (low, medium, and high). These samples were labeled as overburden (OB) for the lab program but are not organic or alluvial and are in competent rock, originating from drill holes overlying or adjacent to the higher grade ore zones at both Altenburg Hill, and Gold Pan, along with one drill hole located in the south Porphyry area.
 
The gold content in these OB composites is currently below that envisioned to be suitable for crushing and leaching on prepared pads. The material may be suitable for dump leaching and consequently was evaluated for cyanidation response in the testing program. A summary of the head assays for the OB composites is provided in Table 13.12.
 
Table 13.12: OB Composites Head Analyses
 
Composite
Au
Ag
Cu
ST
S2-
ID
g/tonne
oz/ton
ppm
ppm
%
%
OB-Comp-Low
0.28*
0.008
3*
668
0.30
0.22
OB-Comp-Med
0.28*
0.008
3*
377
0.98
0.76
OB-Comp-High
0.28*
0.008
2*
416
0.10
0.08
 
* Average of triplicate direct assay.

Despite an attempt to segregate the three samples based on grade from the exploration geochemical gold analyses, the three samples had very similar gold and silver content, as averaged from triplicate assay splits. The medium grade sample had higher sulfide content.
 
13.3.6.2 Bottle Roll Testing
 
A series of thirty bottle roll tests were performed on the initial composites, with some of the composites subjected to alternate procedures including the use of carbon in leach (CIL) methods to evaluate any potential preg robbing effect. Baseline bottle roll procedures including crushing to a particle size of 80% passing 1.7 mm (10 Tyler mesh). Bottle roll testing was conducted under protective alkalinity of pH 10.5 to 11 for 96 hours maintaining 1.0 g/L cyanide at approximately 40% solids.
 
The first set of 8 bottle rolls were performed on the Altenburg Hill oxide composites, with the results summarized in Table 13.13
 
 
 
Coral Gold Resources Ltd. 13-17 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Table 13.13: Altenburg Hill Oxide Composites –Bottle Roll Gold Leach Response
 
Composite
Recovery,
Extracted
Tail
Head (Au g/t)
ID
% Au
Au, g/t
Au, g/t
Calc.
Assay
AH-CC10-3-OX
60.0
0.39
0.26
0.65
0.68
AH-CC10-4-OX
58.5
0.62
0.44
1.06
0.96
AH-CC10-5-OX
73.0
0.65
0.24
0.89
1.1
AH-CC10-6-OX
63.2
0.43
0.25
0.68
0.66
AH-CC10-7-OX
72.3
1.12
0.43
1.55
1.37
AH-CC10-8-OX
66.7
0.42
0.21
0.63
0.72
AH-CC10-9-OX
88.7
0.47
0.06
0.53
0.69
AH-CC10-10-OX
63.9
0.46
0.26
0.72
0.73

Gold extractions for the various samples ranged from 58% to 88% within the 96 hour leach retention time. Detailed results the majority of the gold went into solution within the first 24 hours with dissolution nearing the maximum when leaching was terminated. The calculated and assayed heads for gold appear to be reasonably close. Tailing gold grades were variable between 0.06 g/t to 0.44 g/t. Higher losses roughly correlated to the increased head grades, indicating there may be a benefit to increase leach retention times for higher head grades.
 
Silver recoveries were 26% to 55% on heads of 2-7 g/t Ag. Soluble copper was typically less than 10%, except for composite AH-CC10-10-OX, which had 17% copper dissolution. This was likely due to an elevated sulphate content as compared to the other oxide samples. Soluble copper did not appear to adversely affect precious metal recovery, but cyanide consumption increased to 0.74 kg/tonne for sample AH-CC10-10-OX as compared to an average of 0.17 kg/tonne for the other seven oxide composites. Lime consumption was reasonably uniform for all samples in a range of 1.5 to 2.3 kg/tonne.
 
The next set of bottle roll leach tests discussed are on the two partially oxidized composites Gold Pan composites as shown in Table 13.14. Composite GP-CC10-15-POX was repeated in triplicate due to disagreement between the assayed and calculated heads.
 
Table 13.14: Gold Pan Deposit Partially Oxidized Composites
Bottle Roll Gold Leach Response
 
Composite
Rerun
Recovery,
Extracted
Tail
Head (Au g/t)
ID
 
% Au
Au, g/t
Au, g/t
Calc.
Assay
GP-CC10-13-POX
n/a
85.1
1.43
0.25
1.68
1.9
GP-CC10-15-POX
1
81.5
0.66
0.15
0.81
0.34
GP-CC10-15-POX
2
78.4
0.58
0.16
0.74
0.34
GP-CC10-15-POX
3
90.6
0.58
0.06
0.64
0.34

If averaging the 3 tests for GP-CC10-15-POX, the bottle roll results gave gold extractions in the mid eighty percent range. The three tests repeated on GP-CC10-15-POX all gave calculated heads close to double the assay head. The tailing grade also showed considerable fluctuation resulting in a 12% variation in gold recovery using the same sample and conditions. This sample also showed elevated sulfide content and approximately 25% copper dissolution during cyanidation that may be contributing to the variability of the sample. The average lime and cyanide consumptions of the three tests performed on GP-CC10-15-POX were similar respectively averaging ~3.2 kg/t and 0.4 kg/t. Leach profiles showed minor increases to precious metal dissolution when the testing was terminated at 96 hours. Further work is required to better understand the reasoning behind the variability in composite 15. GP-CC10-13-POX had a gold recovery of 85% in part owing to the higher head of 1.68 g/t (0.049 oz/t). It showed elevated lime consumption of 7.1 kg/tonne, but a moderate cyanide consumption of 0.26 kg/t.
 
 
 
Coral Gold Resources Ltd. 13-18 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
The results for bottle roll testing on the Altenburg Hill sulfide samples is provided in Table 13.15. Each of the four composites was run using standard baseline bottle roll procedures, as well as a second method consisting of carbon in leach (CIL) as a means of investigating preg robbing potential.
 
Table 13.15: Altenburg Hill Sulfide Composites –Bottle Roll Gold Leach Response
 
Composite
Method
Recovery,
Extracted
Tail
Head (Au g/t)
ID
 
% Au
Au g/t
Au g/t
Calc.
Assay
AH-CC10-3-SUL
CN
70.5
0.43
0.18
0.61
0.74
AH-CC10-3-SUL
CIL
66.1
0.39
0.20
0.59
0.74
AH-CC10-4-SUL
CN
70.4
0.57
0.24
0.81
0.85
AH-CC10-4-SUL
CIL
68.8
0.53
0.24
0.77
0.85
AH-CC10-6-SUL
CN
66.2
0.45
0.23
0.68
0.54
AH-CC10-6-SUL
CIL
60.8
0.31
0.20
0.51
0.54
AH-CC10-8-SUL
CN
57.4
0.35
0.26
0.61
0.55
AH-CC10-8-SUL
CIL
53.2
0.33
0.29
0.62
0.55

The gold extractions for the Altenburg Hill sulfide composites varied between 53% to 70%, which are slightly lower than the oxide samples discussed previously. This is likely in part due to the lower head grades and slower leach kinetic response. Tailing grades were in a similar, but narrower range than shown for the oxide composites. The use of CIL procedures did not show improved gold extraction, indicating a preg robbing component due to gold re-adsorption is not present. Inexplicably cyanide and lime consumption were consistently elevated in CIL verses the standard cyanide procedures. Cyanide consumptions with standard procedures ranged from 0.3 to 0.8 kg/t, which is higher than with the Altenburg Hill oxides. Lime consumption for the Gold Pan sulfides is in a range of 1.4 to 2.2 kg/t, similar to the oxides.
 
Bottle roll tests were also performed on four Gold Pan sulfide composites comparing CIL to standard leach procedures. The results as outlined in Table 13.16.
 
 
 
 
Coral Gold Resources Ltd. 13-19 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Table 13.16: Gold Pan Deposit Sulfide Composites
Bottle Roll Gold Leach Response
 
Composite
Method
Recovery,
Extracted
Tail
Head (gAu/t)
ID
 
% Au
Au g/t
Au g/t
Calc.
Assay
GP-CC10-12-SUL
CN
56.1
0.37
0.29
0.66
0.86
GP-CC10-12-SUL
CIL
58.1
0.43
0.31
0.74
0.86
GP-CC10-13-SUL
CN
50.0
0.32
0.32
0.64
0.73
GP-CC10-13-SUL
CIL
50.0
0.32
0.32
0.64
0.73
GP-CC10-14-SUL
CN
59.4
0.38
0.26
0.64
0.63
GP-CC10-14-SUL
CIL
56.4
0.31
0.24
0.55
0.63
GP-CC10-15-SUL
CN
44.3
0.39
0.49
0.88
0.72
GP-CC10-15-SUL
CIL
51.2
0.44
0.42
0.86
0.72

The use of CIL did not show a significant improvement to gold recovery with one possible exception on sample GP-CC10-15. This gave a 0.07gAu/t lower tailing grade, transposing into a 7% increase in extraction. Most of the leaching was completed within 96 hours with the possible exception of composite 14. The final gold recoveries on the sulfide composites were lower as compared to the two partially oxidized composites evaluated for Gold Pan, and discussed previously. Again this is partly due to the lower head grades, but the tailing also contained higher corresponding gold losses. Cyanide consumptions were elevated ranging from 0.9 to 2.3 kg/t. Lime consumption for the Gold Pan sulfide composites varied from 1.7 to 2.2 kg/t, with one notable exception in GP-CC10-13 which was 6.3 kg/t.
 
The three overburden (OB) samples were run under the standard bottle roll conditions and results are summarized in Table 13.17.
 
Table 13.17: OB Composites –Bottle Roll Gold Leach Response
 
Composite
Recovery,
Extracted
Tail
Head (Au g/t)
ID
% Au
Au, g/t
Au, g/t
Calc.
Assay
OB-Comp-Low
63.0
0.17
0.10
0.27
0.28
OB-Comp-Med
54.2
0.13
0.11
0.24
0.25
OB-Comp-High
59.3
0.16
0.11
0.27
0.28

Original head assay for OB-Comp-Med, showed 0.25 gAu/t, but follow-up analyses with triplicate fire assay gave 0.28 g/t for all three composites (see Table 13.12 previously). This sample also has the highest sulfide content of the three composites. The results indicate all three composites had a similar leach profile with relatively fast kinetics and with similar tailing grades. Calculated heads varied slightly resulting in a gold recovery range of 54% to 63%. Reagent consumption for the three composites was also similar ranging from 0.30 g/t to 0.53 kg/t for cyanide, and 1.9 kg/t to 2.5 kg/t for lime.
 
13.3.6.3 Bottle Roll Comparisons
 
Plots of gold recovery verses head grade, and verses sulfide content are shown respectively in Figures 13-1 and 13-2 for all of the oxide (OX), partially oxidized (POX) and sulfide (SUL) composites that were tested.
 
 
 
Coral Gold Resources Ltd. 13-20 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
*from McClelland Laboratories Inc.
 
Comparisons within the various composite types indicate that head grade has a minor effect on recovery; and that the sulfide content likely plays a more significant roll. Higher head grade within composite types results in modestly higher recovery, and with higher tailing losses that may benefit from continued leach retention time. Generally higher sulfide content corresponds to lower gold recovery. Evaluation of the detailed lab report indicates that the organic carbon content and preg robbing factor may have played a related but minor role with the sulfide content. There does not appear to be a strong preg robbing characteristic for these samples.
 
 
 
Coral Gold Resources Ltd. 13-21 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Cyanide consumption was significantly influenced by extent of copper dissolution and the sulfide content in the feed. Increased copper dissolution and higher sulfide content translated into a marked increase in cyanide consumption as shown in Figures 13.3 and 13.4
 
*from McClelland Laboratories Inc.
 
13.3.7 Column Leaching
 
13.3.7.1 Procedure
 
Following evaluation of the bottle roll test data, seven column leaching tests were performed on minus 19 mm (-3/4”) composites. The study included separate column tests on each of the three
 
 
 
Coral Gold Resources Ltd. 13-22 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
overburden samples (OB) composites, using splits of the same material that had been crushed to -10 Tyler mesh for bottle roll testing. The remaining composites representing oxidized (OX), partially oxidized (POX) and sulfide (SUL) ore samples (that were also used for bottle roll tests) were re-blended into new master composites for column leaching. Table 13.18 below provides a summary of the feed material used in each of the columns, as well as the height and dry weight of the feed, and the inside diameter of the column. A more detailed explanation of the methods follows the table.
 
Table 13.18: -3/4” Column Leach Composites
 
Column
Composite
Material
Head
Weight
Height
Dia
#
ID
Description
Au, g/t
Kg
m
cm
P1
OB-Comp-Low
same as bottle roll
0.28
127.3
2.59
20
P2
OB-Comp-Med
same as bottle roll
0.28
126.6
2.63
20
P3
OB-Comp-High
same as bottle roll
0.28
123.9
2.52
20
P4
RP-CC10- OX/POX
AH oxide plus GP partial oxide
0.92
146.2
2.96
20
P5
AH-CC10-SUL
Altenburg Hill (AH) sulfides
0.67
71.3
2.43
15
P6
GP-CC10-SUL
Gold Pan (GP) sulfides
0.74
73.3
2.63
15
P7
RP-CC10- OX/SUL
mixed oxide, POX, sulfides
0.87
71.5
2.59
15
 
Each of the columns were loaded with >95% passing 19 mm (3/4”) rock. Based on the initial loaded weight and column volume the respective bulk density of the solids was calculated to range from 1.53 to 1.57 for the overburden, oxide and partially oxidized samples. The bulk density of the Altenburg Hill and Gold Pan sulphides were 1.64, and 1.56 respectively. Upon commencement of leaching the solution uptake to saturation ranged from 9.4% to 12.9% for the various columns. Particle size distribution was performed on each feed material and assayed head grades for the column were based on the weight and analyses of the screened fractions. Lime was added with the dried blended solids to the column and protective alkalinity was maintained throughout the leach. Agglomeration with cement was not incorporated.
 
The column leaching tests (P1, P2, P3) were respectively performed on the three overburden (OB) samples Low, Med, High, which effectively all had similar head grades of 0.28 gAu/t.
 
Test P4 was done on the eight oxidized composites from Altenburg Hill blended with the two partially oxidized composites from the Gold Pan resulting in an estimated grade of 0.92 gAu/t. Each of these 10 composites of P4 made up roughly equal mass (~10 wt.% ea.) for the 146 kg loaded into the column.
 
The remaining columns had less material available and used smaller diameter columns of 15 cm. Test P5 consisted of the same four Altenburg Hill sulphide composite samples that had been used in bottle roll testing. These were blended together for the column leach in approximately equal amounts of 25 wt.% each and totalled 71 kg with an estimated grade of 0.67 gAu/t. Similarly, the four Gold Pan sulphide composites were blended in roughly equal amounts to produce 73 kg of feed grading 0.74 gAu/t for test P6.
 
 
 
 
Coral Gold Resources Ltd. 13-23 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
The seventh column (P7) used of combination of the eight Altenburg Hill oxide composites in equal portions of 7.5 wt.% each, accounting for 60% of the mass total loaded into the column. The remainder was made up from the two partially oxidized Gold Pan composites in equal portions accounting for an additional 15% of the loaded mass and the Gold Pan sulphides which made up the remaining 25%. The blended material weighed 71.5 kg was calculated to grade 0.87 g/t Au.
 
Each column was percolated with 1.0 g/L NaCN solution and routinely monitored to record flow and cyanide consumption. Hydrated lime provided protective alkalinity. The loaded pregnant leachate solutions (PLS) from the column underflow were passed through activated carbon. Gold and silver dissolution was routinely measured in the PLS, as well as the barren recycle solution, and ultimately balanced against the loaded carbon. Rest and rinse cycles were employed as deemed appropriate. At termination of leaching the column had a final wash and leached solids analyzed as part of the precious metal balance.
 
13.3.7.2 Results
 
The seven column tests (P1 to P7) were performed on -19 mm (-3/4”) feed material that consisted of;
 
·  
P1, P2, P3: three columns of low grade gold mineralization, labelled as overburden (OB).
·  
P4: consisting of oxide composites from Altenburg Hill (80% of weight) mixed with partially oxidized material from Gold Pan (20% of the weight).
·  
P5, P6: two columns on sulfide material composited respectively from the Altenburg Hill and Gold Pan deposits.
·  
P7: a blended column of Altenburg Hill oxide composites (60 wt.%) with Gold Pan composites that were partially oxidized (15 wt.%), with Gold Pan sulphides (25 wt.%).
 
The feeds were subjected column cyanide leaching with a summary of the results provided in Table 13.19 below.
 
Table 13.19: -3/4” Column Leach Results

Test
#
Sample
ID
Time,
days
Leach Soltn.
mt/mt ore
Gold
%Rec.
Gold Grade (Au, g/mt)
Silver
% Rec.
Ag g/mt
Calc. Hd.
Copper
% Rec.
Screen Hd
Cu, ppm
NaCN
kg/mt ore
Lime
kg/mt ore
Tail Screen
Calc. Hd.
Screen Hd.*
P1
OB-Comp-Low
109
3.3
48.1
0.14
0.27
0.25
n/a
n/a
n/a
733
1.29
1.50
P2
OB-Comp-Medium
109
3.3
44.0
0.14
0.25
0.21
36.4
1.1
16.9
398
1.24
2.00
P3
OB-Comp-High
109
3.4
53.1
0.15
0.32
0.25
20.0
1.5
0.7
364
1.21
1.70
P4
RP-CC10-OX/POX
98
4.8
61.5
0.42
1.09
1.07
28.1
3.2
22.4
735
1.84
1.60
P5
AH-CC10-SUL
59
2.9
39.7
0.38
0.63
0.98
18.5
2.7
15.2
806
1.17
1.40
P6
GP-CC10-SUL
59
2.8
24.0
0.57
0.75
0.81
26.7
1.5
23.1
735
1.30
2.70
P7
RP-CC10-OX/SUL
59
3.7
57.7
0.33
0.78
0.87
30.8
2.6
20.1
698*
1.81
2.00
 
The columns were run for between 59 to 109 days and were terminated based on the leach profile showing that gold dissolution was nearing completion. The three OB composites (tests P1, P2, P3) showed slightly different extents of leaching although the profiles remained similar. For all three tests gold leaching proceeded rapidly for the first 2 weeks to approximately 1/3 extraction. Slower kinetics then prevailed with OB Comp High (P3) having the best results with 53% gold extraction. This was followed by OB Comp. Low (P1) and OB Comp. Medium (P2) which had 48% and 44% respective gold extractions. The calculated and screened heads ranged from 0.21 g/t Au to 0.32 g/t Au, but were generally lower than assayed heads that were performed for bottle roll testing that gave 0.28 gAu/t.
 
Silver and copper extraction was not followed for test P1. Silver showed 20% recovery for P2, and 36% recovery for P3, respectively on head grades of 1.1 g/t and 1.5 g/t. Copper dissolution was significantly higher on test P2 verses test P3, but did not appear to significantly affect cyanide consumption which was approximately 1.2 kg/t. Lime consumption ranged between 1.5 to 2.0 kg/t for the three OB columns.
 
 
 
 
Coral Gold Resources Ltd. 13-24 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Significantly, the precious metal leach curves, continued to show modest increases at termination as shown in Figure 13-5 and 13-6 below for the low and high OB composites.
 
 
 
 
Coral Gold Resources Ltd. 13-25 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
The leach profile indicates relatively slow kinetics with minor improvements to overall precious metal recoveries expected by further extending the leach times. Column tailing grades averaged 0.14 g/t Au and were modestly higher than corresponding -10 mesh bottle roll tests that averaged 0.11 gAu/t. This indicates the OB material gold recoveries can be expected to hold up well with larger crush sizes.
 
Test P4 was performed on the eight oxide composites from Altenburg Hill blended with the two partially oxidized composites from Gold Pan in equal ratios. Each of these composites had previously been subjected to bottle roll testing. The final column gold extraction after 98 days of leaching is calculated at 62% on a calculated head of 1.09 g/t. Silver extraction was 28% on a calculated head of 3.2 g/t. The corresponding leach profile is provided in Figure 13-7.
 
 
 
 
Coral Gold Resources Ltd. 13-26 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
The final tailing grade for test P4 analyzed 0.42 gAu/t. This compares to the tailing grades in the 10 corresponding bottle roll tests that ranged from 0.06 g/t to 0.44 g/t, with an un-weighted average tailings grade of 0.21 gAu/t. The overall column performance provided lower gold recoveries and higher tailing analyses as compared to the bottle roll testing done on -10 mesh material. Looking at the screen analyses data by particle size fraction of the spent column shows poor extractions were achieved in the 40% of material weight above 12.5 mm (1/2”). Material less than 12.5 mm gave correspondingly decreasing tailing grades with finer particle size. This suggests further investigation into using a finer crush size than the 19 mm used is warranted.
 
Column tests P5 and P6 were respectively performed on sulfide composites from the Altenburg Hill and Gold Pan deposits. Gold analyses for test P5 is being rechecked due to poor agreement between the assayed and calculated heads. Leach profiles for these two tests are provided in Figure 13-8 for Altenburg Hill sulfides and in Figure 13-9 for Gold Pan sulfides.
 
 
 
 
Coral Gold Resources Ltd. 13-27 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
 
Coral Gold Resources Ltd. 13-28 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 

The column data shows a relatively poor leach response as compared to the corresponding bottle roll tests done on sulfide composites from each of the two deposits. The four Altenburg Hill bottle rolls done by standard cyanide procedures (not including CIL) gave an average un-weighted gold recovery of 66% based on 0.23 g/t tailing and 0.52 g/t average calculated head. Column P5 had 0.38 g/t Au with 0.63 g/t Au in the calculated head resulting in 40% recovery.
 
Similarly for Gold Pan sulfides the un-weighted average bottle roll gold recovery of 52%, based on 0.34 g/t tailing from 0.71 g/t averaged calculated head. This compares to a column (P6) tailing grade of 0.57 g/t on a calculated head of 0.75 g/t, Au resulting in 24% recovery. Silver recoveries generally followed the gold dissolution profile for test P6.
 
The lower gold recovery in columns P5 and P6 are likely primarily due to poor permeability of sulfide particles in the coarser crushed material. Lower oxygen availability and minor preg robbing characteristics may have also contributed to the lower column leach response. Cyanide consumption for the sulfide material was in a similar range as the other columns as previously summarized in Table 13.19.
 
The final column test P7 was operated on mixed oxide and sulfide materials, with the leach profiles plotted in Figure 13-10.
 
 
 
The blended sulfide and non-sulfide composites provided 58% gold recovery based on a calculated head of 0.78 g/t that resulted in 0.33 g/t tailing. This appears to offer a relatively good correlation to the expected recovery based on the ratio of sulfide and non-sulfide feed materials used.
 
 
 
 
Coral Gold Resources Ltd. 13-29 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 

A final comparison of the bottle roll data to the corresponding column extractions is plotted in Figure 13-11.
 
 
The plot outlines the lower recoveries from the column results verses the bottle roll data. The largest variation is graphically shown for the sulfide material (tests P5, P6).
 
13.4 CONCLUSIONS
 
The 2011 laboratory program was performed on 2010 drill core samples composited from the Robertson Property to evaluate heap leaching potential. The leaching studies included testing on both oxide and sulfide material from the Altenburg Hill deposit, and on partially (potentially) oxidized and sulfide material from the Gold Pan deposit. The program also included testing of low grade gold composites (~0.28 g/t Au) that were classified as overburden from areas that would need to be mined in order to access higher grade zones. Initial test work included bottle roll cyanidation performed on 30 composites from these areas and deposits. Bottle rolls were undertaken for 96 hours on composites that had been crushed to minus 1.7 mm (-10 Tyler mesh). This was followed by column leach test work on seven re-blended master composites that had been crushed to 95% passing minus 19 mm (-3/4”) and operated for periods between 59 to 109 days.
 
Three overburden (OB) composites with ~0.28 g/t head grades showed bottle roll recoveries averaging 59% recovery, with fixed tailing grades of ~0.11 g/t. The three corresponding column leach tests had lower average calculated head grades and gave an average recovery of 48% with tailing grades of 0.14 g/t. Considering the head grade variation the overall coarser crush size in the columns compared well to bottle roll data. The column leach profiles suggest that extending the leach time may improve recoveries slightly. Future evaluation at coarser crush sizes is required to determine how the OB material would respond to dump leaching techniques. A preliminary estimate would suggest a gold recovery of 40% to 50% could be expected for OB type material.
 
A column leach for non-sulfide ore was performed on a blend of Altenburg Hill oxide material (80% by weight), blended with partially oxidized Gold Pan material (~20% by weight). The results provided a gold recovery of 62%. This is considerably lower than the average bottle roll testing gold recovery of 71%, which was done on the sub-composites that together made up the column feed material. Examination of the results of the screened column tailing suggest that the majority of the losses were in the +12.5 mm (+1/2”) fraction. Historic studies suggested that a minus 1/2” crush size appeared to be optimum for the property. The earlier studies also included more detailed investigation on the Porphyry deposit and reported that a 67% gold recovery might be applied with a -1/2” crush size. The most recent test data suggests a similar recovery might be applicable to oxide composites from Altenburg Hill and Gold Pan, if crushed to 1/2”.
 
There were two column leach studies performed on sulfide material, one from Altenburg Hill composites and the other on Gold Pan composites. Both tests experienced significantly lower recoveries than the corresponding bottle rolls. A third column used sulfides blended with oxide material. Based on these three overall column results, heap leach recoveries can be expected to decrease with the addition of higher ratios of sulfide ore. Additional study is required to better determine this relationship.
 
Depending on the schedule of project advancement, on-site testing can be considered for both heap and dump leaching evaluation to supplement and /or replace portions of a laboratory program. This would involve bulk mining and building of cribs and/or test heaps (with pads and ponds) in order to better evaluate leaching of low grade run of mine rock as well as higher grade crushed material. Such a program would be costly as it involves contract bulk mining of several thousand tons of rock, mobile crushing and stacking, and long term monitoring. Costs would need to be developed with local contractors and suppliers.
 
 
 
Coral Gold Resources Ltd. 13-30 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
SECTION 14.0 MINERAL RESOURCE ESTIMATES 14.1 INTRODUCTION
 
The following sections detail the methods, processes and strategies employed in creating the resource estimate for the Robertson Deposit. Table 14.1 lists some conventions and abbreviations that are encountered throughout the resource estimation section of this report.
 
Table 14.1: Report Conventions and Abbreviations
 
 
14.2 DATA EVALUATION
 
A total of 1,266 drillholes were supplied for the Robertson Property in Lander County, Nevada which are the combined drillholes for the Gold Pan, 39A, Porphyry, Altenburg Hill and Lower Triplett Gulch zones in addition to areas that have drilling but lie outside the main areas of interest. The drillholes within the database included collars, downhole surveys, assays, and lithology.
 
The drillhole database (US Imperial) was delivered in electronic format which was supplied by Coral. This included collars, downhole surveys, lithology data and assay data (i.e. ozAu/t) with downhole from and to intervals in imperial units. It should be noted that some surface data was supplied in metric units and then converted to imperial. It is considered that this conversion has been done correctly and the author has verified that the data is valid with respect to location.
 
Simple statistics for the assay data are shown below in Table 14.2 and 14.3, which shows statistics for gold assays weighted and unweighted by assay interval, respectively.
 
 
 
Coral Gold Resources Ltd. 14-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Table 14.2: Statistics for Gold Assays for the Robertson Deposit
Unweighted
 
 
Count
Maximum
Mean
Std. Devn.
Co. of Variation
Gold Pan
24,760
2.886
0.009
0.033
3.896
Porphyry
22,463
0.959
0.011
0.026
2.403
Altenburg Hill
6,562
0.847
0.007
0.020
2.711
           
39A
12,703
1.524
0.013
0.048
3.580
Distal
1,982
0.439
0.009
0.032
3.398
Triplet Gulch
12,991
2.000
0.003
0.022
6.690
Outside
9,660
1.006
0.004
0.024
5.634
All
91,121
2.886
0.009
0.031
3.672

Table 14.3: Statistics for Gold Assays for the Robertson Deposit
Weighted by Assay Interval
 
 
Ft.
Maximum
Mean
Std. Devn.
Co. of Variation
Gold Pan
132,113
2.886
0.009
0.033
3.797
Porphyry
108,980
0.959
0.011
0.026
2.412
Altenburg Hill
33,844
0.847
0.007
0.020
2.749
           
39A
69,735
1.524
0.013
0.046
3.639
Distal
11,134
0.439
0.009
0.031
3.305
Triplet Gulch
70,160
2.000
0.003
0.022
6.424
Outside
56,792
1.006
0.004
0.023
5.895
All
482,758
2.886
0.008
0.031
3.695
 
The assay Au database (91,121 Au values) shows that gold distributions are very well behaved (in comparison with other deposits), still with a some samples in each case representing a outlier populations. The mean overall for Au grade (weighted by sample length) is 0.008 ozAu/t with standard deviation of 0.031. However, within the individual zones the mean grade is 0.009, 0.013, 0.011, 0.007, 0.009 and 0.003 ozAu/t for the Gold Pan, 39A, Porphyry, Altenburg Hill, Distal and Triplet Gulch areas, respectively. In addition, the assays that lay outside these specific areas are listed with the average grade being 0.004 ozAu/t.
 
Gold assays have a relatively high coefficient of variation (CV) of 3.797, 3.639, 2.412, 2.749, 3.305 and 6.424, respectively (weighted by sample length in Table 14.3). This indicates a relatively modest scatter of the raw data values. The coefficient of variation is defined as CV=σ/m (standard deviation/mean), and represents a measure of variability that is unit-independent. This is a variability index that can be used to compare different and unrelated distributions.
 
Figure 14-1 shows the histogram weighted by assay interval length, of all Au assays along with the corresponding probability plots in Figures 14-2. The histograms and cumulative probability plots shows that the assay data all demonstrate log normal distributions. Figure 14-3 and 14-4 shows a plan and long section views of the drillholes.
 
 
 
Coral Gold Resources Ltd. 14-2 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
 
Coral Gold Resources Ltd. 14-3 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
 
Coral Gold Resources Ltd. 14-4 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
14.3 TOPOGRAPHY
 
Topography was imported from an AutoCAD topographic map supplied by Coral in DXF format. The topography was surveyed and is believed to be accurate. Checks against drillhole collars illustrate and accuracy to within 1 meter with the exception of one drillhole which was identified and corrected. In addition, in an effort to delineate the top of mineralization, a model of bottom contact of the Quaternary Alluvium layer (QAL) was triangulated from drillhole intercepts. This surface is shown in Figure 14-6.
 
 
 
Coral Gold Resources Ltd. 14-5 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
Figure 14-6: Plan view of the 3D gridded model of Quaternary Alluvium layer (north to top of screen).
 
 
 
Coral Gold Resources Ltd. 14-6 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
14.4 COMPUTERIZED GEOLOGIC MODELING
 
Solids models of the main ore zones within the Robertson Deposit were created that encompass the Gold Pan, 39A, Porphyry, Altenburg Hill, Distal and Triplet Gulch deposit areas. The ore zones to be included within the solids model and then to be used for constraining the interpolation procedure are split into an Oxide Zone and a Sulphide Zone where sufficient data existed to do so which included that Gold Pan, 39A, Porphyry and Alteberg Hill areas. Due to its depth, the Distal zone is considered to be sulphide material.
 
Once the solids models were created, they were used to then code the drillhole assays and composites for subsequent geostatistical analysis. For the purpose of the resource model, the individual solid zones were utilized to constrain the block model by matching assays to those within the zones in a process called geologic matching so that only composites that lie within a particular zone are used to interpolate the blocks within that zone. The orientation and ranges (distances) utilized for search ellipsoids used in the estimation process were derived from previous reports, site observations and geostatisical analysis.
 
Figure 14-7 shows the solids created that encompass the Gold Pan, 39A, Porphyry, Altenburg Hill, Distal and Triplet Gulch deposit areas. Figure 14-9 illustrates the oxide solid that identifies the oxide/sulphide interface. All material lying outside the oxide solid is considered sulphide by default.
 
 
 
Coral Gold Resources Ltd. 14-7 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 

 
 
Coral Gold Resources Ltd. 14-8 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
 
Coral Gold Resources Ltd. 14-9 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
 
Coral Gold Resources Ltd. 14-10 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
14.5 COMPOSITES
 
It was determined that the 20 foot composite lengths offered the best balance between supplying common support for samples and minimizing the smoothing of the grades in addition to reducing the effect of high grades to a small extent. However, the primary reason for the choice of 20 feet for the composite length was that bench heights are likely to be 20 feet and this will be the selective mining unit. Table 14.4 shows the basic statistics for the 20 foot composites for Au listed by zone and by oxide/sulphide sub-zone. Figures 14-13 and 14-14 illustrate the histogram, grade-tonnage curve and cumulative distribution plots for gold composite grade intervals. Figure 14-15 shows the box plots for each of the zones split by oxide and sulphide with the numeric codes as listed in Table 14.4. It is important to note that the oxide and sulphide for Gold Pan, Altenburg Hill and Triplet Gulch are markedly similar and that separation by domaining is not necessary whilst the oxide and sulphide within the Porphyry zone so illustrate differing populations and presents a case for domaining. The same could be said for Distal however only a small percentage of the assays are in oxide and are of very low grade therefore Distal is considered to be sulphide. In addition, 39A illustrates distinctively higher grades and character which confirms the need to segregate 39A into an individual domain and interpolate separately.
 
Table 14.4 Composite Statistics
 
 
ZONE
OX/SUL
Length
Max
Mean
1st Q
Median
3rd Q
SD
CV
11
Distal
Oxide
1,695
0.055
0.003
0.000
0.000
0.001
0.009
3.540
12
Distal
Sulphide
25,109
0.196
0.006
0.000
0.001
0.004
0.017
3.019
22
39A
Sulphide
31,215
0.452
0.023
0.004
0.008
0.021
0.043
1.891
31
Gold Pan
Oxide
81,724
0.367
0.008
0.001
0.004
0.008
0.017
2.186
32
Gold Pan
Sulphide
95,506
0.781
0.008
0.002
0.004
0.009
0.021
2.599
41
Porphyry
Oxide
99,773
0.418
0.011
0.002
0.007
0.014
0.018
1.575
42
Porphyry
Sulphide
11,359
0.118
0.005
0.000
0.002
0.007
0.009
1.749
51
Alt Hill
Oxide
34,160
0.218
0.009
0.002
0.005
0.011
0.012
1.418
52
Alt Hill
Sulphide
6,530
0.063
0.007
0.002
0.005
0.008
0.007
1.097
61
Triplett
Gulch
Oxide
22,655
0.502
0.005
0.000
0.002
0.005
0.018
3.868
62
Triplett
Gulch
Sulphide
51,230
0.335
0.003
0.000
0.001
0.003
0.010
3.080
72
East
Zone
Sulphide
22,660
0.311
0.004
0.000
0.001
0.004
0.016
3.562
Total
   
483,616
0.781
0.009
0.001
0.004
0.009
0.020
2.343
All
   
527,962
0.781
0.008
0.001
0.003
0.008
0.020
2.442
 
 
 
 
Coral Gold Resources Ltd. 14-11 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
 
 
Coral Gold Resources Ltd. 14-12 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
14.6 OUTLIERS
 
Limiting the influence as opposed to capping of gold assays were performed for although the distribution of grades followed a normal distribution the probability plots showed “breaks” which indicated multiple populations. The author used the commonly accepted method of determining metal-at-risk, which employs the utilization of cumulative frequency plots and identifying “breaks” along the plot trend. The grade threshold chosen was determined to be 0.18 ozAu/t.
 
However, it is important to note the method employed for this study is not to cut the high grade outliers but to limit their influence. The range chosen at which to limit grades greater than the outlier cutoff was determined to be 50 feet. In other words, composite grades greater than 0.18 ozAu/t would not influence blocks greater than 50 feet from where that composite is located.
 
 
 
Coral Gold Resources Ltd. 14-13 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
14.7 SPECIFIC GRAVITY DETERMINATIONS
 
Approximately 215 historic core samples were analyzed for dry bulk density using the volume displacement method. Densities for both ore and waste are primarily related to lithology, argillization, calc-silicate content and sulfide content. The average density for country rock was determined to be 12.2 cu ft/ton and 15.5 cu ft/ton for alluvium (2 determinations). These are historic determinations, are located for the most part, within the Porphyry Zone. In addition, 279 specific gravity measurements were derived for samples from Altenburg Hill and Gold Pan in 2010.
 
14.8 VARIOGRAPHY
 
The author carried out geostatistical analysis on the composites to evaluate the search parameters to be used in the grade estimate.
 
Downhole correlograms were generated in order to make an estimate of the nugget effect as that is the direction in which there is most abundant data. The downhole correlogram for the complete dataset within the zones indicates that the nugget effect is in the order of 55% of the sill for Au as shown in Figure 14-17. Although this is relatively high, it is to be expected to some extent and within acceptable ranges for a typical gold deposit.
 
 
 
Coral Gold Resources Ltd. 14-14 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
Geostatistical analyses were also performed on the composites in all directions using no constraints in addition to the coded intervals within the zone solids split out by oxide/sulphide.
 
The ellipsoid direction chosen for the estimation process was chosen to be 0 degrees azimuth and 0 degrees dip for the major axis and -90 degrees for the vertical axis as there appears to be no predominant direction of mineralization. The 39A Zone appears to dip 270 degrees at an azimuth of 30 degrees so this direction was utilized for the 39A Zone. The Porphyry Zone appears to strike at 45 degrees at an azimuth of -30 degrees and a rotated vertical orientation of -20 degrees.
 
The spatial continuity estimator chosen for this study was the correlogram, which has been shown in previous work to be more robust with respect to drift and data variability, allowing a better estimation of the observed continuity (Parker and Srivastava, 1988). Note that the sill of the variograms has been standardized to one, and therefore they are in fact relative variograms.
 
 
 
 
Coral Gold Resources Ltd. 14-15 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
14.9 BLOCK MODEL DEFINITION
 
The Block Model used for calculating the resources was defined according to the following limits:
 
 
The block model is non-rotated as there appears to be no predominant orientation that reflected regional or local mineralization trends. Figure 14-18 shows the position and orientation of the block model used for the study. The block size chosen was 25 x 25 x 20 foot to roughly reflect drill hole spacing available and to adequately descretize the deposit.
 
 
 
Coral Gold Resources Ltd. 14-16 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
Of the potential 36,946,000 blocks to be estimated (490 columns, 520 rows, 145 levels); less than 1,327,655 blocks or 3.6% have estimated values in them (weighted against topography). This is primarily due the geologic constraints applied to the estimation process in addition to the limited search distances applied, search ellipsoid direction and the use of ordinary kriging as the modeling method.
 
14.10 INDICATOR ESTIMATION
 
To further domain the mineralized material within the large, broad zones the author created iso­volumes of ordinary kriged probability indicators at a 0.005 ozAu/t cut-off grade within which to constrain the grade estimation. This methodology entails coding all grades above 0.005 ozAu/t with 1 and those below with a zero. Variography is then performed and the values are then kriged using the correlogram parameters which results in the blocks being assigned with values between 0 and 1 which represents the probability that the block will have a grade greater than 0.005 ozAu/t (i.e. 0.5 represents essentially 50% probability). Those blocks that have an indicator greater than 0.5 are then clustered into iso-volumes which are edited in order to exclude isolated blocks and portions of the iso-volumes that have tails.
 
These iso-volumes as shown in Figure 14-19, are then used to further domain the zones and constrain the resource interpolation
 
 
 
Coral Gold Resources Ltd. 14-17 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
14.10.1 Resource Interpolation
 
The estimation plan includes the following items:
 
    ·  Storage of the mineralized zone and iso-volume code and percentage of mineralization.
 
    ·  Application of density based on limited SG measurements.
 
    ·  Estimation of the grades for Au using ordinary kriging.
 
    ·      Ellipsoid orientation was orthogonal and ranges were set to 300 feet in the northing and easting whilst 200 feet in elevation.
 
The estimation strategy employed a minimum of four composites and a maximum of 15 with a maximum of two from any one drillhole.
 
Also, an octant search was used as it aids in declustering the estimate. This means that it helps to avoid over-influence of individual drill holes or sectors being overly informed, avoiding the use of samples that clustered together and thereby redundant. The maximum number of composites allowed in any one octant was two.
 
The resultant block model is illustrated in plan view in Figure 14-20 at a 0.0147 OzAu/t cut-off grade through one level.
 
 
 
 
Coral Gold Resources Ltd. 14-18 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
14.11 RESOURCES
 
The inferred resources as defined by the parameters detailed above are listed in the Table 14.5 for Au. These resources are listed at a cut-off grade of 0.0147 ozAu/tAu for each zone and split out by oxide and sulphide.
 
 
 
 
 
Coral Gold Resources Ltd. 14-19 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
    ·  Gold ounces were calculated on the basis of US$1,350/oz Au and 70% Au recovery.
    ·  The 0.0067 ozAu/t cut-off grade utilized to report the resource was derived from a mining cost of US$1.02/ton, process cost of US$5.00/ton and waste cost of US$1.14/ton.
    ·  The mineral resources in the table above were estimated using the CIM Standards on Mineral Resources and Reserves.
 
14.11.1 Model Validation
 
A graphical validation was done on the block model. This graphical validation serves several purposes:
 
·  
Checks the reasonableness of the estimated grades, based on the estimation plan and the nearby composites.
·  
Checks that the general drift and the local grade trends of the block model, compared to the drift and local grade trends of the composites.
·  
Insure that all blocks that should be filled in, are in fact filled in.
·  
Checks that topography has been properly accounted for.
·  
Checks against manual “ballbark” estimates of tonnage to determine reasonableness.
·  
Inspection of and an explanation for high grade blocks created as a result of outliers.
 
A full set of cross sections, long sections and plans were used to check the block model on the computer screen, showing the block grades and the composite. No evidence of any block being wrongly estimated was found: it appears that every block grade can be explained as a function of the surrounding composites, the correlogram models used, and the estimation plan applied.
 
Table 14.6 lists the total inferred resources for all zones by cut-off grade.
 
 
 
 
Coral Gold Resources Ltd. 14-20 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
Coral Gold Resources Ltd. 14-21 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
 
 
 
Coral Gold Resources Ltd. 14-22 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
Validation techniques are as follows:
 
·  
Visual inspections on a section-by-section and plan-by-plan basis.
·  
Histogram at varying cut-off grades demonstrate a very uniform, normal distribution.
·  
The use of Grade Tonnage Curve as shown in Figures 14-20.
·  
Swath Plots showing the comparison of the Ordinary Kriged blocks vs. Inverse Distance and Nearest Neighbor estimates.
·  
An inspection of histograms of distance of first composite to nearest block, average distance to blocks for all composites.
·  
Analysis of Relative Variability Index which quantifies variability within the deposit.
 
It is important to note the nearest distance to composite, average distance to composite and RVI as useful tools for categorizing resources may be utilized for future resource classification as a measure of quantifying risk and qualifying resources.
 
14.12 PIT OPTIMIZATION
 
A series of pit optimizations were run at varying price scenarios. For the purposes of this report, the following parameters were used as the basis for the optimization which was the basis for the preliminary pit design:
 
·  
Ore mining cost of US$1.27 per ton
·  
Waste mining cost of US$1.43 per ton
·  
Processing cost of US$6.25 per ton
·  
Metallurgical recovery of 70%
·  
Gold price of US$1,000 per ounce
·  
Tonnage factor of 12.2 cubic foot per ton
·  
Pit slope angles of 45 degrees
 
 
 
Coral Gold Resources Ltd. 14-23 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
14.13 PIT DESIGN AND RESOURCES
 
Based on the pit optimization study as described above, the preliminary pit design was created using the following parameters:
 
Bench interval
20 feet at double benches for a total of 40 feet
Berm width
25 feet
Pit slope angle
45 degrees
Slope angle bench
70 degrees
Roadway gradient
8%
Roadway width
105 feet
 
 
 
 
Coral Gold Resources Ltd. 14-24 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
The tables below list the inferred resources within the Altenburg Hill, Porphyry and Gold Pan design pits, respectively.
 
 
 
 
Coral Gold Resources Ltd. 14-25 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Table 14.7: Inferred Resources Altenburg Hill
 
AH  
BENCH
ORE
WASTE
   
ORE
WASTE
   
LOW GRADE
LOW GRADE
TOE
TONS
TONS
S/R
AUOK
TONS
TONS
S/R
AUOK
TONS
AUOK
5440
-
4,355
-1
-1
-
4,355
-1
-1
-
 
5420
28,945
21,568
0.8
0.0174
43,576
6,936
0.2
0.0156
14,631
0.012
5400
31,650
122,121
3.9
0.0166
143,340
10,430
0.1
0.0122
111,690
0.011
5380
23,648
310,635
13.1
0.0154
310,697
23,586
0.1
0.0102
287,049
0.010
5360
42,295
464,160
11.0
0.0158
443,873
62,582
0.1
0.0103
401,578
0.010
5340
86,619
584,180
6.7
0.0170
529,180
141,619
0.3
0.0116
442,561
0.011
5320
84,764
704,426
8.3
0.0165
616,168
173,023
0.3
0.0114
531,404
0.011
5300
77,121
932,439
12.1
0.0165
776,281
233,279
0.3
0.0113
699,160
0.011
5280
94,928
1,050,256
11.1
0.0178
845,953
299,232
0.4
0.0112
751,025
0.010
5260
169,242
1,214,703
7.2
0.0172
938,146
445,799
0.5
0.0115
768,904
0.010
5240
229,180
1,292,121
5.6
0.0178
1,036,363
484,939
0.5
0.0115
807,183
0.010
5220
509,990
1,268,043
2.5
0.0194
1,197,848
580,184
0.5
0.0145
687,858
0.011
5200
624,160
1,319,365
2.1
0.0221
1,248,555
694,969
0.6
0.0162
624,395
0.010
5180
561,762
1,643,781
2.9
0.0228
1,350,400
855,143
0.6
0.0155
788,638
0.010
5160
368,689
1,860,625
5.1
0.0178
1,342,879
886,434
0.7
0.0125
974,190
0.010
5140
180,953
1,808,391
10.0
0.0157
1,156,527
832,818
0.7
0.0116
975,574
0.011
5120
309,744
1,444,641
4.7
0.0170
1,143,299
611,086
0.5
0.0123
833,555
0.011
5100
453,463
1,176,045
2.6
0.0186
1,123,822
505,686
0.5
0.0137
670,359
0.010
5080
419,775
926,537
2.2
0.0189
1,046,496
299,816
0.3
0.0141
626,721
0.011
5060
356,486
888,812
2.5
0.0172
1,016,158
229,139
0.2
0.0133
659,672
0.011
5040
255,881
733,494
2.9
0.0175
828,709
160,666
0.2
0.0133
572,828
0.011
5020
278,893
612,080
2.2
0.0174
721,271
169,703
0.2
0.0139
442,378
0.012
5000
99,682
553,289
5.6
0.0181
546,773
106,199
0.2
0.0123
447,091
0.011
4980
128,053
384,488
3.0
0.0206
413,330
99,211
0.2
0.0135
285,277
0.010
4960
69,344
232,326
3.4
0.0223
245,133
56,537
0.2
0.0145
175,789
0.011
4940
55,205
171,988
3.1
0.0202
194,416
32,777
0.2
0.0138
139,211
0.011
4920
17,100
92,090
5.4
0.0168
109,057
133
0.0
0.0114
91,957
0.010
TOTAL
5,557,572
21,816,957
3.9
0.0189
19,368,249
8,006,281
0.4
0.0130
13,810,677
0.011
 
 
 
 
Coral Gold Resources Ltd. 14-26 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Table 14.8: Inferred Resources Porphyry
 
PORPHYRY  
BENCH
ORE
WASTE
   
ORE
WASTE
   
LOW GRADE
LOW GRADE
TOE
TONS
TONS
S/R
AUOK
TONS
TONS
S/R
AUOK
TONS
AUOK
5360
-
47,008
-1
-1
-
47,008
-1
-1
   
5340
-
193,596
-1
-1
-
193,596
-1
-1
   
5320
-
350,809
-1
-1
-
350,809
-1
-1
   
5300
-
584,672
-1
-1
-
584,672
-1
-1
   
5280
-
787,961
-1
-1
25,133
762,828
30.4
0.0082
25,133
0.008
5260
-
1,077,264
-1
-1
66,414
1,010,850
15.2
0.0082
66,414
0.008
5240
2,910
1,345,236
462.3
0.0155
127,387
1,220,758
9.6
0.0088
124,477
0.009
5220
24,498
1,757,254
71.7
0.0171
313,115
1,468,637
4.7
0.0096
288,617
0.009
5200
36,742
2,342,695
63.8
0.0189
484,928
1,894,508
3.9
0.0097
448,186
0.009
5180
111,721
3,420,502
30.6
0.0181
1,034,836
2,497,387
2.4
0.0107
923,115
0.010
5160
320,881
4,225,369
13.2
0.0188
1,923,535
2,622,715
1.4
0.0112
1,602,654
0.010
5140
485,164
5,320,000
11.0
0.0196
2,561,978
3,243,186
1.3
0.0119
2,076,814
0.010
5120
647,346
5,323,719
8.2
0.0197
2,928,914
3,042,152
1.0
0.0121
2,281,568
0.010
5100
834,539
5,005,502
6.0
0.0201
3,144,150
2,695,891
0.9
0.0125
2,309,611
0.010
5080
895,922
4,351,752
4.9
0.0202
3,070,646
2,177,029
0.7
0.0131
2,174,724
0.010
5060
989,693
4,058,064
4.1
0.0197
3,003,637
2,044,119
0.7
0.0134
2,013,944
0.010
5040
851,014
3,598,617
4.2
0.0198
2,845,277
1,604,355
0.6
0.0132
1,994,263
0.010
5020
874,150
3,368,350
3.9
0.0185
2,768,463
1,474,037
0.5
0.0129
1,894,313
0.010
5000
925,646
2,757,234
3.0
0.0190
2,485,461
1,197,418
0.5
0.0137
1,559,815
0.011
4980
893,996
2,416,055
2.7
0.0198
2,159,283
1,150,768
0.5
0.0145
1,265,287
0.011
4960
879,980
1,973,832
2.2
0.0198
1,984,262
869,549
0.4
0.0149
1,104,282
0.011
4940
897,039
1,776,516
2.0
0.0202
1,927,879
745,676
0.4
0.0151
1,030,840
0.011
4920
840,082
1,434,355
1.7
0.0203
1,752,490
521,947
0.3
0.0151
912,408
0.010
4900
857,193
1,242,920
1.5
0.0221
1,627,039
473,074
0.3
0.0164
769,846
0.010
4880
785,174
938,525
1.2
0.0231
1,455,297
268,402
0.2
0.0171
670,123
0.010
4860
839,160
788,064
0.9
0.0234
1,433,269
193,955
0.1
0.0181
594,109
0.011
4840
719,365
673,545
0.9
0.0224
1,274,918
117,992
0.1
0.0176
555,553
0.011
4820
700,820
602,182
0.9
0.0233
1,198,955
104,047
0.1
0.0180
498,135
0.011
4800
610,031
479,672
0.8
0.0233
1,022,408
67,295
0.1
0.0182
412,377
0.011
4780
555,369
448,156
0.8
0.0227
916,875
86,650
0.1
0.0181
361,506
0.011
4760
545,021
258,607
0.5
0.0217
749,795
53,832
0.1
0.0189
204,774
0.011
4740
452,777
258,781
0.6
0.0220
657,469
54,088
0.1
0.0187
204,692
0.011
4720
343,391
197,838
0.6
0.0240
509,898
31,332
0.1
0.0197
166,507
0.011
4700
217,879
244,303
1.1
0.0246
397,818
64,365
0.2
0.0186
179,939
0.011
4680
131,998
171,004
1.3
0.0226
239,857
63,145
0.3
0.0177
107,859
0.012
4660
68,371
157,992
2.3
0.0228
134,857
91,506
0.7
0.0169
66,486
0.011
TOTAL
17,337,870
63,977,952
3.7
0.0209
46,226,242
35,089,580
0.8
0.0143
28,888,372
0.010
 
Table 14.9: Inferred Resources Gold Pan
 
GP  
BENCH
TOE
ORE TONS
WASTE TONS
S/R
AUO K
ORE TONS
WASTE TONS
S/R
AUOK
LOW GRADE
LOW GRADE
TONS
AUOK
5540
 
1,393
-1.0
1.0000
-
1,393
1.0
-1.0000
   
5520
-
32,213
-1.0
1.0000
-
32,213
1.0
-1.0000
   
5500
-
53,914
-1.0
1.0000
-
53,914
1.0
-1.0000
   
5480
-
29,477
-1.0
1.0000
13,740
115,738
8.4
0.0080
13,740
0.008
5460
5,748
267,090
46.5
0.0202
115,543
157,295
1.4
0.0088
109,795
0.008
5440
18,863
545,574
28.9
0.0222
242,654
321,783
1.3
0.0099
223,791
0.009
5420
5,799
1,122,684
193.6
0.0219
302,357
826,127
2.7
0.0097
296,558
0.009
5400
53,525
1,631,404
30.5
0.0177
458,207
1,226,721
2.7
0.0105
404,682
0.010
5380
190,420
1,789,836
9.4
0.0190
836,209
1,144,047
1.4
0.0118
645,789
0.010
5360
181,824
1,982,807
10.9
0.0178
1,098,361
1,066,270
1.0
0.0111
916,537
0.010
5340
209,119
1,781,752
8.5
0.0173
1,201,926
788,945
0.7
0.0113
992,807
0.010
5320
360,697
1,534,375
4.3
0.0201
1,321,639
573,432
0.4
0.0129
960,942
0.010
5300
359,570
1,286,168
3.6
0.0231
1,396,486
249,252
0.2
0.0133
1,036,916
0.010
5280
433,504
1,118,402
2.6
0.0249
1,385,113
166,793
0.1
0.0148
951,609
0.010
5260
555,420
766,219
1.4
0.0255
1,205,584
116,055
0.1
0.0174
650,164
0.010
5240
586,834
645,523
1.1
0.0239
1,140,594
91,762
0.1
0.0176
553,760
0.011
5220
422,725
592,172
1.4
0.0223
984,764
30,133
0.0
0.0154
562,039
0.010
5200
229,262
696,516
3.0
0.0197
911,148
14,631
0.0
0.0125
681,886
0.010
TOTAL
3,613,310
15,977,521
4.4
0.0223
12,614,324
6,976,506
0.6
0.0135
9,001,014
0.010
 
 
 
 
Coral Gold Resources Ltd. 14-27 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
SECTION 15.0 MINERAL RESERVE ESTIMATES
 
There are no mineral reserves.
 
 
 
 
 
 
 
 
 
 
Coral Gold Resources Ltd. 15-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
SECTION 16.0 MINING METHODS
 
16.1 MINING
 
16.1.1 Resources and Production Rates
 
The estimated open pit resources for the Altenburg Hill, Porphyry and Gold Pan deposits contained within the Robertson property are described in Section 14. These resources were used to derive the yearly mineral production rate based upon mining a maximum 40,000tpd (14 million tons per year). This production rate was chosen based on the configuration of the mineralized zones and a mine life that balances capital expenditures against operating costs to provide the optimum return on investment. The open pit design incorporates mining the Altenburg Hill and Porphyry deposits first as a combined operation. This is based upon the following;
 
    ·  size;
    ·  location and proximity; and
    ·  strip ratios.
 
Size
 
The resources estimated for the Altenburg Hill and the configuration of the deposit is relatively small and to mine this independently would not allow for the production rate developed within this plan to be achieved. Thus the Porphyry commences production at the same time as the Altenburg Hill and by combining the production from each open pit the required production rate is achieved while meeting practicable mining criteria and acceptable operating costs.
 
Location and Proximity
 
The Altenburg Hill and Porphyry deposits lie adjacent to each other and close to the proposed location for the leach pads to the south and the proposed waste rock disposal area. The location of the ramp entrance to each pit can be accessed by a single haul road located between the pits. This allows for an interchange between open pit mining equipment since it can be considered as a single pit with two access ramps and provides for a flexible and efficient mining operation.
 
Strip Ratios
 
When starting a mine operation such as envisaged at Robertson it is advantageous to minimize the strip ratio and maximize grade; often a starter pit will be established to enable this to occur. Unfortunately the present resource estimate does not allow for this to be achieved since mining the higher grade material only in year 1 and 2 amounts to approximately 1.9 million tons. The grade difference between HG and LG is only 0.008 ozAu/t and the extra cost involved in mining this material as a starter pit would be more than offset by mining lower grade material in subsequent years. Also the Porphyry pit does not readily lend itself to a starter pit.
 
The Altenburg Hill deposit is basically a mineralized hill and thus has a low strip ratio, on average 0.4: 1 waste to ore with a ratio of 0.35:1 for the initial two years whereas the Porphyry averages 2.44 for the first two years. Thus mining the two deposits together reduces the initial strip ratio significantly.
 
 
 
Coral Gold Resources Ltd. 16-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
These mineral resource estimates are designated as inferred5.
 
Table 16.1 shows the yearly production schedule.
 
16.1.2 Pit Design
 
Open pit operations are planned as a conventional truck-and-shovel operation, utilizing diesel-powered equipment to maintain flexibility and minimize capital costs. Several combinations of truck/shovel size ranges were evaluated, with the most cost effective being a 40 cuft excavator in combination with100 ton haul trucks. Overall pit design was based on an overall slope angle of 45° for all walls. This is considered conservative since the geotechnical evaluation indicated 50o. Ore and waste will be mined on 20 ft benches. Bench width on the northwest and south walls will be 25 ft; on the east and west it will be 30 ft. The overall height between benches will be 40 ft, with a bench face angle of 70°.
 
The crusher will be located at the lower elevation below and to the south east of the Porphyry pit. and adjacent to the HG leach pad. These locations have been chosen to minimize haul distances for waste and rock (see Figure 1.2). The haul road within the pit has a maximum grade of 10%.
 
16.1.3 Mining Operations
 
Mining activities at the pits will be conducted on 7 days per week, two 10-hour shifts per day, 350 days per year. (based upon 52 weeks, 7 days per week gives 365 days less 15 statutory holidays). The study has been based upon owner-purchased and owner-operated equipment. Budget costs for a contractor operated open pit operation were obtained from a USA contractor who has experience in Nevada
 
Ore and waste will be drilled and blasted using 6.5 in. diameter holes on a 15 ft x 15 ft pattern.
 
Blasting operations will use a combination of ammonium nitrate and fuel oil (ANFO) and water-resistant emulsion explosives. Estimated powder factors range between 0.31 and 0.33 kg/t material. There should be no water concerns with the pit envelopes since the pit bottoms are above the water table. Precipitation, due to the low rain/snow fall, is not considered a concern thus it has been assumed that about 20% of the holes will be “wet.”
_____________________
5 Due to the uncertainty that may be attached to an inferred mineral resource, it cannot be assumed that all or any part of an inferred mineral resource will be upgraded to an indicated or measured resource as a result of continued exploration.
 
 
 
Coral Gold Resources Ltd. 16-2 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
 
Coral Gold Resources Ltd. 16-3 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
In addition to the 35 cu ft hydraulic loading shovel and 100 ton rigid body haul trucks, several pieces of auxiliary and service equipment will be required to maintain haul roads and waste dumps, and for general pit operations. A list of all major equipment is shown in Table 16.2.
 
Table 16.2: List of Major Equipment
 
Description
# Req'd
Atlas Copco Viper Drill
2
Komatsu PC1800 Shovel
1
Komatsu WA90
1
Komatsu HD785-7
8
Komatsu HD155AX-6
2
Komatsu GD655
1
Komatsu 600-6
1
Air trac/compressor
1
Komatsu HD325-7
2
Service truck
2
Crane truck
1
Blaster's truck
2
Light plant
4
Pick ups
5
Pump truck
1
 
16.2 MANPOWER
 
The manpower estimates for operations are based upon similar mining operations, the type and number of pieces of equipment, and the general operations of the facilities.
 
The estimate of persons employed directly by the project is 145 persons. A breakdown of personnel is shown in Tables 16.3, 16.4, 16.5.16.6 and 16.7.
 
In addition to direct employment, the project will create approximately 3 to 4 times more indirect jobs through associated service providers and mine suppliers.
 
Table 16.3: Administration Staff
 
Description
No. Req'd
General Manager
1
Mine Superintendent
1
Maintenance Superintentent
1
GM Secretary
1
Chief Accountant
1
Purchasing Agent
1
Personnel/Office Manager
1
Environmental Co-ordinator
1
Safety Director
1
Safety Trainers
2
Acct/purch/admin assistants
4
Total
15
 
 
 
 
Coral Gold Resources Ltd. 16-4 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Table 16.4: Surface Operations
 
Description
No. Req'd
Equipment Operators
2
Utility Personnel
2
Maintenance
4
Misc. Labourers
4
Sub-total
12
Total
27
 
Table 16.5: Mine Staff
 
Description
Mine Staff Required
Mine Foreman
1
D&B Foreman
1
Mech Foreman
1
Sr. Engineer
1
Engineer
2
Surveyor
2
Sr Geologist
1
Geologist
2
Sampler
4
Clerical
4
Labourers
4
Total
23

Table 16.6: Mine Operations
 
Mine Operations – Labour
Activity
Category
# Required
Drilling
Drill Operator
Helper
2
2
Blasting
Blaster
Helper
1
2
Loading
Operator
Helper
2
2
Haulage
Truck Drivers
12
Roads / Dumps
Dozer Operator
Grader Operator
2
2
Maintenance
Lead Mechanic
Mechanics
Serviceman
Labourers
2
2
2
2
Total
 
35
 
 
 
 
Coral Gold Resources Ltd. 16-5 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Table 16.7: Process Plant and Leach Pad
 
Description
# Required
Plant Operations
 
Plant operator
8
Plant Helper
8
Refiner Operator
2
Labourer
6
Leach Pad
 
Pad Operator
3
Pad Helper
3
Assay Laboratory
 
Assayer
2
Sample Preparation
4
Plant Maintenance
 
Mechanic/Welder
4
Mechanic Helper
4
Electrician
1
Total
45
 
 
 
 
 
Coral Gold Resources Ltd. 16-6 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
SECTION 17.0 RECOVERY METHODS 17.1 PROCESS DESCRIPTION
 
17.1.1 Introduction
 
The process description as indicated below is based upon the production rates and proposed mine plan. The general approach is to utilize two heap leach pads one for crushed ore and the other for run-off-mine material. The run-off-mine material will required a closer blast pattern than that required for the ore to be crushed to reduce the size of material to be placed on the leach pad.
 
17.1.2 Recovery Methods
 
Ore will be loaded onto two separate heap leach pads based on gold grade, and at a combined rate of 20,000 tons per day (tpd). A high grade pad will be will be employed for ore above a cutoff grade of 0.0147 oz/ton (0.50 g/mt) following crushing to a nominal 1/2 inch (12.5 mm) particle size. A second pad will operate on run of mine low grade ore projected to be minus 6 inch (150 mm) and using a cut-off grade of 0.0050 oz/ton (0.17 g/mt). Pregnant leachate solution (PLS) from both pads will be directed to a PLS storage pond and pumped to the adsorption desorption recovery (ADR) plant for recovery of gold, along with minor silver credits with on-site Dore production. A simplified flowsheet is provided in Figure 17-1.
 
The high grade (HG) run of mine ore will be hauled by ore trucks from the open pits to the crusher at an average expected rate of 7,500 tpd. The HG ore will be direct dumped into a 150 t capacity dump pocket through a 20 inch (500 mm) static grizzly screen. Closed circuit crushing will consist of a 200 HP primary 42” X 48” jaw crusher feed feeding a reclaim feeder and conveying to a 200 HP 5.5 foot standard cone crusher for secondary crushing. Secondary crushed product would be screened with the oversize directed to final crushing using a 200 HP 5.5 foot shorthead cone crusher. Final crushed and screened product will be transported to the heap leach by an overland conveyor and a series of portable conveyors to a radial stacker that will place the HG ore onto the pad. There is no agglomeration. The final pad design consists of five lifts, each approximately 10 m high. The run of mine low grade (LG) ore would be trucked at an average rate of 12,500 tpd and transferred to the pad by direct dump methods. ARD plant plan and elevation views are provided in Figures 17-2. Crushing plant plan and elevations are shown on Figures 17-3 and 17-4.
 
The heap leach pads consist of an underlying compacted layer of low permeability soil or clay overlaid with a 2 mm thick HPDE/LLDPE synthetic liner. Overlying material for liner protection will consist of crushed and screened HG ore. Heap irrigation will be by drip emitters for the HG ore pad and sprinklers for the LG ore pad at a projected rate of ~12 L per h/m2. Collected PLS will be directed to the pregnant solution ponds. The process solution ponds will be double HDPE lined and equipped with leak detection pumps.
 
PLS will be pumped to the ADR plant where gold adsorption will be accomplished in two trains, each consisting of five 10 ft (3 m) diameter carbon tanks. Barren solution from the ADR plant will be directed to a barren storage pond and reapplied to the heaps. Gold will be stripped from the collected loaded carbon, followed by standard electrowinning and smelting techniques to produce Dore. Operations will be 365 days per year.
 
 
 
Coral Gold Resources Ltd. 17-1 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
Figure 17-1: Crushing Heap Leach Process 7500tpd

 
 
 
Coral Gold Resources Ltd. 17-2 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
Figure 17-2: ARD Plan and Elevation

 
 
 
Coral Gold Resources Ltd. 17-3 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
Figure 17-3: ARD Plan and Elevation

 
 
 
Coral Gold Resources Ltd. 17-4 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
Figure 17-4: ARD Plan and Elevation
 
 
 
Coral Gold Resources Ltd. 17-5 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
SECTION 18.0 PROJECT INFRASTRUCTURE 18.1 GENERAL
 
18.1.1 Introduction
 
In order to provide leach pads for the different grades of mineralization two separate heap leach pads will be constructed, one for the low-grade ore and another for high-grade ore respectively. Low-grade run-of-mine ore will be stacked on the low-grade heap while high-grade ore will pass through a crushing circuit prior to being stacked on the high-grade heap.
 
The heap leach facilities will be constructed on a gently sloping hillside that will drain freely under the effect of gravity. The heap leach pads will be dosed with weak cyanide solution to dissolve gold contained within the ore. Lined collection channels placed along the downstream toe of the leach pads will drain gold-bearing solution to the pregnant solution pond. The cyanide solution that has passed through the heaps is referred to as “pregnant” solution. Pregnant solution is then pumped to an Adsorption-Desorption-Recovery (ADR) plant. The ADR will strip gold from the solution, rendering the solution “barren”. The barren solution is contained in a second pond (termed the barren solution pond) where it will be re-circulated to the heap leach pads.
 
The retained gold will be refined and cast into gold doré bars using facilities located on site.
 
This report addresses the general civil and geotechnical design conditions that affect the development of major mine site earthworks (open pit development, foundation design), heap leach pad design, waste management, and site wide surface water management.
 
18.1.2 Site conditions 18.1.2.1 Climate
 
Limited climate data is available for the Robertson Property project; however, the project area can be described as cold, semi-arid (Köppen climate classification: type Bsk). Regions of this type often exhibit hot and dry summers and very cold winters. Snowfall often occurs in winter months, albeit at much lower quantities than more humid areas at similar latitudes.
 
The site exhibits a climate that is typical of Northern Nevada high desert. The area is characterized by a short warm to hot summer season, relatively long and cold winters and moderate springs and falls.
 
Mean monthly temperatures (Fahrenheit) are estimated in the low to mid-20s during December through February; low to mid-30s in November and March, 50s in May and September and low to upper-60s from June through August. Summer time highs can reach nearly 90 degrees and winter lows can fall below zero. The following table summarizes the monthly climate data that is available for the region.
 
 
 
Coral Gold Resources Ltd. 18-1 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
Table 18.1: Monthly Climate Data1
 
   
Temperature
   
Precipitation
   
Evaporation2
   
Snowfall
 
Month
 
Min. Average [ºF]
   
Max. Average [ºF]
   
[in]
   
[in]
   
[in]
 
January
    14.7       39.9       0.84       n/a       5.5  
February
    20.5       25.3       0.67       n/a       2.6  
March
    25.3       53.6       0.76       n/a       1.7  
April
    29.8       62.5       0.86       n/a       0.7  
May
    37.3       72.4       1.17       8.55       0.1  
June
    44.0       82.4       0.84       9.95       0  
July
    50.3       91.9       0.29       12.8       0  
August
    47.5       89.9       0.44       11.3       0  
September
    38.6       80.6       0.51       8.12       0  
October
    28.7       67.5       0.59       4.90       0.2  
November
    21.6       51.0       0.83       n/a       1.1  
December
    15.7       40.8       083       n/a       3.4  
Annual
    31.2       64.8       8.62       n/a       15.2  
 
1 Monthly climate data from Western Regional Climate Center, Beowawe Station –
2 Evaporation data from Rye Patch Dam Station (7192) from NOAA-EDIS.
 
18.1.3 Seismicity
 
A preliminary review of the regional seismicity has been carried out to enable selection of an appropriate design earthquake event for seismic stability assessment of the heap leach facility.
 
According to maps generated by the US Geological Survey (Figure 18-1), this area has a peak horizontal ground acceleration ranging between 0.10g to 0.15g corresponding to the 475-year event, defined as an event which has a 10% probability of exceedance in 50 years.
 
 
 
Coral Gold Resources Ltd. 18-2 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 

Figure 18-1 : USGS Seismic Hazard Map – Peak Ground Acceleration (1:475)

 
 
 
Coral Gold Resources Ltd. 18-3 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
 
18.1.4 Mine Development
 
Proposed Layout of Mining Facilities
 
The preliminary general arrangement is shown on Figure 1-3. The general arrangement shows the full build out condition of the proposed mine development including the following components:
 
· Site access from Nevada State Route 306.
· On site light-duty access roads.
· On site haul routes.
· Surface water drainage diversions.
· Storm water pond.
· Ancillary facilities, including:
· Administrative offices
· Warehouse
· Dry facilities
· Maintenance shop
· Fuel depot
· Explosives storage, and
· Gatehouses.
· Proposed open pits, including:
· Porphyry Pit
· Altenburg Hill Pit, and
· Gold Pan Pit.
· Crushing facilities and high-grade ore conveyor.
· Fresh water ponds.
· Heap leach circuit infrastructure, including:
· High-grade ore heap leach facility
· Low-grade ore heap leach facility
· Solution transfer channels
· Pregnant solution pond
· ADR process plant
· Barren solution pond, and
· Event (storm water) pond.
 
Design criteria for the open pit, heap leach facilities, waste rock storage area, water management facilities, and foundations of critical structures are discussed in the following sections.
 
18.2 OPEN PIT DESIGN CRITERIA
 
18.2.1 Information Review
 
A slope stability study to determine pit slope angles at the Porphyry Open Pit was conducted in 1994 for Amax Gold Inc. (Watters R., 1994). The study was based on information derived from diamond drill core and core logs. Four simplified geological domains were delineated, including diorite, skarn/endoskarn, Calcite-silicate hornfels and biotite-hornfels.
 
 
 
Coral Gold Resources Ltd. 18-4 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


The 1994 geotechnical study indicated that the East Wall had unfavourable discontinuity orientations where ‘discontinuities may dip towards the slope face’ based on limited outcrop stereographic analyses. The adverse structural features were found to be less significant for the rest of the pit walls.
 
Rock mass characterization was conducted during the 1994 geotechnical study using the Rock Mass Rating (RMR, Bieniawski, 1976) classification system. Rock mass within the East Wall was identified to be weaker based on unfavourable discontinuity orientations and resulted in the lowering of the calculated RMR. The average values of the equivalent rock mass shear strength parameters for the 1994 Porphyry Pit are below:
 
East Walls – Friction Angle = 23 degrees, Cohesion = 5100 psf, and
West, North and South Walls – Friction Angle = 29 degrees, Cohesion = 7400 psf.
 
The conclusions of this study identified six sectors of the preliminary pit walls for overall slopes ranging from 50 to 56 degrees for the West, North and South Sectors and 45 degrees for the East Sector.
 
18.2.2 Slope Stability Analysis
 
The Porphyry Pit has been expanded and two additional smaller pits, Altenburg Hill and Gold Pan, have been included in the current PEA study. The maximum slope heights for the expanded Porphyry Pit, Altenburg Hill Pit, and Gold Pan Pit will be in the order of 700 ft, 500 ft and 300 ft, respectively (Garth Kirkham, January 2011). The geological information for the new pits is very limited.
 
A series of limit equilibrium stability sensitivity analyses were carried out to determine appropriate overall slope angles for the proposed open pits. The targeted Factor of Safety (FOS) for the overall slopes was 1.3 and the following assumptions were made in the analyses:
 
·  
Average rock mass strength parameters determined from the 1994 study were applied in the analyses.
·  
It is assumed that the rock mass structural features and rock mass qualities are similar in these proposed pits (i.e., weaker rock mass presents in the East Sector).
·  
Groundwater table was considered to be below the pit bottom, as the existing drillhole data suggests that the regional groundwater table is below the extent of all open pits.
·  
The sensitivity analyses cover the following variations:
·  
Overall slope angles: 40, 45, 50 and 55 degrees
·  
Total slope heights: 300, 400, 500, 600 and 700 ft, and
·  
Rock mass strength parameters: Lower bound (1994 Porphyry Pit East Wall data) and upper bound (1994 Porphyry Pit West, North and South Wall average data).
 
The results of the analyses are illustrated as an FOS vs. slope height chart in Figure 18-2. The currently proposed maximum slope heights, preliminary overall slope angles, and resulted FOS for each pit design sector are highlighted as follows:
 
 
 
Coral Gold Resources Ltd. 18-5 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Figure 18-2: Rock Mass Stability Analysis Factor of Safety VS Slope Height
 
Porphyry Open Pit
West Wall: Total slope height = 625 ft, 50º overall slope angle to achieve a FOS of 1.3. North Wall: Total slope height = 700 ft, 45º overall slope angle to achieve a FOS of 1.3. South Wall: Total slope height = 400 ft, 55º overall slope angle to achieve a FOS of 1.5. East Wall: Total slope height = 500 ft, 40º overall slope angle to achieve a FOS of 1.2.
 
Altenburg Hill Open Pit
West Wall: Total slope height = 525 ft, 55º overall slope angle to achieve a FOS of 1.3. North Wall: Total slope height = 325 ft, 55º overall slope angle to achieve a FOS of 1.7. South Wall: Total slope height = 400 ft, 55º overall slope angle to achieve a FOS of 1.4. East Wall: Total slope height = 325 ft, 50º overall slope angle to achieve a FOS of 1.3.
 
Gold Pan Open Pit
West Wall: Total slope height = 325 ft, 55º overall slope angle to achieve a FOS of 1.7. North Wall: Total slope height = 275 ft, 55º overall slope angle to achieve a FOS of 1.7. South Wall: Total slope height = 275 ft, 55º overall slope angle to achieve a FOS of 1.7. East Wall: Total slope height = 225 ft, 50º overall slope angle to achieve a FOS of 1.3.
 
 
 
Coral Gold Resources Ltd. 18-6 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
It should be noted that these analyses considered the overall rock mass stability only. Rock mass structures were not taken into account. Coarse assumptions of geotechnical parameters (rock mass including were made to cover the variation of site uncertainty. Further geotechnical site investigations should be carried out to verify these assumptions.
 
18.2.3 Summary
 
Based on limited geotechnical data and the corresponding stability analysis results, the recommended overall pit slope angles for the PEA study are summarized below:
 
Porphyry Pit: 40° (East Wall), and 50° for the rest of pit walls Altenburg Hill Pit: 50°, and
 
Gold Pan Pit: 50°.
 
It should be noted that these preliminary recommendations were based on limited information and a geotechnical site investigation program should be performed to collect rock mass structural and quality data for detailed slope stability assessment. It is reported that Barrick operations at Cortez, located a short distance to the Robertson Project, has achieved overall slope angles varying from 45 to 50 degrees. There may be potential to optimize slope angles when additional geomechanical data becomes available.
 
18.3 LEACH PAD DESIGN CRITERIA
 
18.3.1 Summary
 
The proposed heap leach facilities will include fully contained pads capable of treating gold ore. Preliminary plans involve the extraction of gold by heap leaching. The heap leaching process will involve the irrigation of weak cyanide solution over successive lifts of heaped ore. A total of 78 million US short tons (Mt) of ore is assumed for the design with consideration for potential expansion. Of this ore, it is assumed that 26 Mt will be routed to the high-grade heap leach pad via a mechanical crushing circuit and 52 Mt will be routed to the low-grade heap leach pad as run-of-mine ore. Geotechnical site investigations have not been carried out. Site investigations, design studies and ore characterization will be required to confirm preliminary design assumptions and the feasibility of the project as the project advances.
 
The site selection, general site conditions, geotechnical implications and design requirements for the heap leach pads are discussed in the following sections.
 
18.3.2 Site Selection
 
The selection of the locations for the heap leach pads was based on the following criteria:
 
· Proximity to the proposed open pits
· Minimizing the overall project footprint
· Storage capacity requirements
· Potential for expansion
· Satisfying stability requirements, and
· Mitigating environmental impact.
 
 
 
Coral Gold Resources Ltd. 18-7 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


While other locations were considered, the preferred site for the heap leach facilities is located between the eastern limits of the proposed Porphyry and Altenburg Hill open pits and Nevada State Route 306. This site can accommodate both the low-grade and high-grade heap leach facilities and their associated infrastructure. The gently sloping terrain (1-2%) is conducive to heap leach operations, allowing pregnant solution to drain via gravity to solution transfer channels located along the downstream toes of each of the heap leach pads.
 
The proposed heap leach pads will be sited on relatively-uniform gently sloping terrain directly to the west of Nevada State Route 306. The east-facing slope runs down gradient from the eastern limits of the Porphyry and Altenburg Hill open pits at approximately 1%. The site was chosen for its proximity to the proposed open pits and the fact that the area has been previously disturbed by historic placer mining operations. Vegetation is comprised primarily of hearty shrubs and grasses with no apparent tree cover.
 
A number of surface expressions exist along the slope. It is likely that the channels were formed by both natural (erosive effects of surface runoff) and anthropogenic means (placer mining activities). The channels are ephemeral and run dry for most of the year. It is anticipated that the channels may be used to further facilitate gravity drainage of the heap leach pads.
 
18.3.3 Design Objectives
 
The primary design objectives for the proposed heap leach pads are as follows:
 
·  
Provide a stable and cost effective configuration for staged heap development
·  
Effectively collect and convey leachate solutions to the pregnant solution pond while ensuring maximum recovery
·  
Provide secure containment of events solutions while monitoring and minimizing losses due to leakage
·  
Minimize surface runoff entering the leach pad area while accounting for the collection of direct runoff from the heap area
·  
Sequential, staged development and leaching operations, and
·  
Effective decommissioning and reclamation of all heap leach facility components.
 
The following sections discuss the storage requirements and preliminary design assumptions and parameters for the proposed leach pads. Design features for each component are discussed below.
 
18.3.4 Design Basis
 
The following sections outline the criteria for the engineering design of the Robertson Property heap leach facilities, associated ponds and drainage controls.
 
18.3.5 Foundation Preparation
 
Foundation preparation includes the removal of vegetation, existing structures and unsuitable materials, and site grading as follows:
 
· Vegetation: clear and grub any vegetation.
 
 
 
Coral Gold Resources Ltd. 18-8 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
·  
Structures: remove any existing structures or infrastructure that interferes with the construction or operation of the proposed facilities.
·  
Surface soils: strip organic soil cover to a maximum of 10 feet beyond the leach pad limits; organic soil should be placed in a temporary topsoil stockpile for use in subsequent reclamation; the exposed ground surface should be scarified, conditioned and re-compacted in at-grade and fill areas.
·  
Site grading: site grading cut and fill according to design; fill to be compacted as directed.
 
18.3.6 Leach Pads
 
The two leach pads will be constructed to process run-of-mine (low grade) and crushed (high grade) ore. Components of the pads are described below:
 
·  
Arrangement: two single-cell pads (high grade and low grade).
·  
Grade: native hillside slopes not to exceed 2.5H: 1V in lined areas; nominally 2.5% in the pad base near the toe; minimum of 1% along pregnant pipeline route from pad to pond.
·  
Perimeter berm: bench graded along perimeter for liner installation; heap to be kept within pad perimeter and 2 feet minimum below perimeter elevation.
 
18.3.7 Pad Liner Systems
 
The leach pad liner systems provide an impervious boundary to contain leach solution and to prevent solution loss. The components of the pad liner systems are listed below:
 
·  
Underliner: geosynthetic clay liner (GCL) deployed on prepared surface; final re-graded subsurface or fill surface to be compacted with a smooth drum roller to form a smooth, firm and unyielding surface with no protruding particles exceeding 1 inch; GCL installed permeability at 1 x 10-6 cm/sec or less.
·  
Geomembrane: 80 mil textured HDPE.
·  
Geomembrane anchor trench: 3 feet minimum depth.
 
18.3.8 Overliner and Solution Drainage System
 
The leach pad overliner protects the geomembrane from exposure to the elements and from vehicle traffic during ore loading. The free-draining overliner, supplemented by drain pipes, also reduces the hydraulic head on the geomembrane and speeds solution recovery. Components of the overliner system are listed below:
 
Overliner: 36 inch minimum thickness of minus 2-inch nominal well-graded, free-draining granular material with less than 10% by weight particles passing the No. 200 ASTM sieve size; placed in a single lift with no compaction; permeability of 1 x 10-3 cm/sec or higher.
 
Solution drain pipes: 4 inch diameter perforated (Type SP) corrugated polyethylene tubing (CPT) lateral pipes on 30-foot centers to collector pipes and to solution collection channel; perforated CPT collector pipes of varying diameters placed across the pad as designed; all CPT lateral and collector pipes to be ADS N-12 dual wall smooth interior pipes, or approved equivalent.
 
 
 
Coral Gold Resources Ltd. 18-9 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
Drain pipe capacity: solution flow at not more than 80% of pipe-full capacity for spare capacity to handle storm and other upset conditions.
 
18.3.9 Pregnant Solution Transfer
 
The pregnant solution transfer allows leach solution and storm runoff to pass from the leach pad to the pregnant solution pond. The pregnant solution transfer system components are listed below:
 
·  
Location: the solution transfer channels will run along the downstream toe of each heap leach pad.
·  
Depth: at grade.
·  
Bottom Width: 6 feet.
·  
Slopes: 2H:1V.
·  
Grade: maximum of 2.5%.
·  
Liner: transfer channel connected to leach pad geomembrane liner.
·  
Capacity: Application solution flow rate at less than 80% bank-full capacity to accommodate surges due to storm and other upset conditions.
 
18.3.10 Pregnant Solution Pond
 
Solution and storm runoff flows conveyed by the pregnant solution transfer channel drain into the pregnant solution pond. The pond components consist of the following:
 
·  
Depth: 12 ft.
·  
Crest width: 25 ft.
·  
Slopes: 2.5H:1V liner interior; 2H:1V unlined exterior.
·  
Bottom grade: graded to drain towards the south corner to facilitate transfer to the ADR facility.
·  
Liner: 60 mil smooth HDPE bottem (secondary) geomembrane; 60 mil smooth HDPE top (primary) geomembrane (surface may be textured for traction); leak detection system consisting of geonet between geomembranes on pond slopes and bottom to corner leak detection sump and riser/monitor system; 3 foot minimum depth for geomembrane anchor trench.
·  
Capacity: total: 370,800 ft3; operationally: 286,500 ft3 with upset capacity storage to contain 24-hour process solution draindown plus 25-year, 24-hour storm from leach pad catchment area plus freeboard.
·  
Freeboard: 2 feet minimum.
 
18.3.11 Barren Solution Pond
 
Barren solution is delivered to the barren solution pond from the ADR facility. The pond components consist of the following;
 
· Depth: 12 ft.
· Crest width: 25 ft.
· lopes: 2.5H:1V liner interior; 2H:1V unlined exterior.
 
 
 
Coral Gold Resources Ltd. 18-10 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

·  
Bottom grade: graded to drain towards the southeast corner to facilitate transfer to the ADR facility.
·  
Liner: 60 mil smooth HDPE bottem (secondary) geomembrane; 60 mil smooth HDPE top (primary) geomembrane (surface may be textured for traction); leak detection system consisting of geonet between geomembranes on pond slopes and bottom to corner leak detection sump and riser/monitor system; 3 foot minimum depth for geomembrane anchor trench.
·  
Capacity: total: 370,800 ft3; operationally: 286,500 ft3 with upset capacity storage to contain 24-hour process solution draindown plus 25-year, 24-hour storm from leach pad catchment area plus freeboard.
·  
Freeboard: 2 feet minimum.
 
18.3.12 Solution Application
 
Solution application involves the uniform application of barren solutions, reagents, low grade pregnant solution recycle and mark-up water to the heap surfaces for controlled infiltration and leaching of the ore. The solution application parameters are listed below:
 
· Flow rate: provided by others.
· Application rate: 56,500 ft3/hr (provided by others).
· Application method: emitters and/or wobblers.
· Leach cycle: variable.
· Active leach surface: 365 acres (low-grade: 188 acres / high-grade: 177 acres) at maximum application rate.
 
18.3.13 Event Pond
 
The event pond provides addition (dry) capacity to prevent excess storm water runoff from overwhelming the pregnant solution pond. An emergency spillway, sized for the 1 in 25 year event, will allow overflow from the pregnant solution pond to drain directly into the event pond. As the overflow solution will likely contain cyanide, the event pond will require lined construction and leak detection similar to the primary solution ponds. The event pond design criteria are listed below:
 
·  
Depth: 22 ft.
·  
Crest width: 25 ft.
·  
Slopes: 2.5H:1V liner interior; 2H:1V unlined exterior.
·  
Bottom grade: graded to drain towards the south corner to facilitate transfer to the ADR facility.
·  
Liner: 60 mil smooth HDPE bottem (secondary) geomembrane; 60 mil smooth HDPE top (primary) geomembrane (surface may be textured for traction); leak detection system consisting of geonet between geomembranes on pond slopes and bottom to corner leak detection sump and riser/monitor system; 3 foot minimum depth for geomembrane anchor trench.
·  
Capacity: Operationally, zero storage. Upset capacity storage to contain 24-hour process solution draindown plus 25-year, 24 hour storm from leach pad area catchments. 7,050 gpm x 24 hrs = 10,137,600 gallons draindown storage plus 14,219,000 gallons storm runoff for a total of 24,356,600 gallons plus freeboard.
 
 
 
 
Coral Gold Resources Ltd. 18-11 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 Freeboard: 2 feet minimum.
 
18.3.14 Diversion System
 
Diversion ditches will be constructed up gradient of the heap leach pads to divert storm runoff from uphill catchments into natural drainage courses. Ditches concurrently serve as pad liner installation benches. The diversion system components are listed below:
 
 Design: trapezoidal channel.
 Depth: varies.
 Bottom grade: 1% minimum.
 Side slopes: varies.
 Freeboard: 1 foot minimum.
 Armour: pad liner, riprap or grouted riprap as needed.
 Capacity: peak flows from the 100-year, 24 hour storm from upstream catchments.
 
18.3.15 Leach Pad Design
 
18.3.15.1 General
 
The two leach pads will be constructed on the east-facing slope of the foothills located to the west of Crescent Valley. The leach pads will extend over an area of approximately 365 acres, filling much of the eastern extent of the property (as shown on Figure 1-3). This area will be re­graded, lined and configured to drain to the pregnant solution pond located downslope to the east of the two pads. This section contains additional description of the leach pad features and their design.
 
18.3.15.2 Grading Plan
 
The grading plan involves development of a lower floor area for the pads to facilitate heap stability and controlled solution drainage from the pads to the pregnant solution pond. The majority of the pad area is presently situated over mildly sloping terrain with occasional undulations. The natural slopes tend to lie within the range of 1%-2% so significant regrading will not be required; however, local undulations may need to be smoothed out.
 
Perimeter roads or benches may be required to facilitate the construction of the pads. These features may also serve as external storm water diversion. Drill and blast work is not anticipated in the heap leach pad areas. Benches will be retained operationally for pad perimeter access and functionally for storm water diversion.
 
The pad floors will be backfilled and built up to form surfaces upon which the pad drainage systems will be constructed. The built up floor area occupies the flatter terrain near the toe of the pads. The floor area will be graded to a consistent 2.5% gradient, draining the toe limit of the pads.

 
 
 
Coral Gold Resources Ltd. 18-12 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


18.3.15.3 Lining System and Overliner
 
The lining system is designed to prevent seepage from within the leach pads from escaping into the underlying subsurface and groundwater environment. The liner system will be comprised of a composite liner and an overliner containing a leachate collection pipe network.
 
The composite liner system consists of a geosynthetic clay liner (GCL) and an 80 mil textured HDPE geomembrane. The GCL will be placed directly on the prepared subgrade using conventional installation, overlapping and sealing techniques. This material is designed to have a hydraulic conductivity of 10-6 cm/s or lower. The 80 mil textured HDPE geomembranes will be placed directly on the GCL using conventional deployment, installation, and seaming techniques.
 
A protective layer of coarse crushed ore will be required over the liner system. This layer will protect the geomembrane from damage during ore placement and will act as a drainage layer to maximize solution recovery while reducing hydraulic head on the liner. The overliner will be a 3 feet (approx.) thick lift over the full extent of each pad. This is required to cover the main solution collection pipes. For an 80 mil (2 mm) HDPE geomembrane, maximum particle size for overliner material should be minus 1.5 inch with low fines content. The solution collection pipe network system will consist of 4 inch HDPE slotted lateral pipes that will drain by gravity into 12 inch HDPE slotted trunk lines or secondary headers. These secondary headers will flow by gravity into 20 inch HDPE slotted primary headers which will drain to the solution transfer channels located at the toe of each heap. The spacing of the pipes should be designed to limit the potential head expected on the liner system.
 
Sections and details of the proposed liner and overliner system are shown on Figures 18-3 and 18-4.
 
 
 
 
Coral Gold Resources Ltd. 18-13 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


Figure 18-3: Heap Leach Facilities Pad Details (1 of 2)

 
 
 
Coral Gold Resources Ltd. 18-14 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Figure 18-4: Heap Leach Facilities Pad Details (2 of 2)

 
 
 
Coral Gold Resources Ltd. 18-15 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
Figure 18-5: Heap Leach Facilities Solution Transfer Channels - Section

 
 
 
Coral Gold Resources Ltd. 18-16 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Figure 18-6: Heap Leach Facilities Solution Pond Details (1 of 2)

 
 
 
Coral Gold Resources Ltd. 18-17 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


Figure 18-7: Heap Leach Facilities Solution Pond Details (2 of 2)

 
 
 
Coral Gold Resources Ltd. 18-18 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
18.3.15.4 Solution Transfer Channels
 
The downstream toe of each heap leach pad will include a lined pregnant solution transfer channel. The channels will be lined with 80 mil textured HDPE geomembranes. These liners will be integrated into the pad liner systems using conventional installation, overlapping and sealing techniques. The downstream end of the liner will be anchored into soil to prevent detachment.
 
The solution transfer channels will drain via gravity to the pregnant solution pond. A minimum gradient of 1% should be maintained to ensure gravity drainage.
 
Sections and details of the proposed solution transfer channels are shown on Figure 18-5.
 
18.3.15.5 Solution Ponds
 
Two separate solution ponds are required for the operation of the heap leach facilities. The pregnant solution pond will receive gold-bearing solution from the two leach pads via the solution transfer channels. Solution from the pregnant solution pond will be pumped directly to the adsorption­desorption-recovery plant for gold extraction. The barren solution would then be pumped to the barren solution pond.
 
Each pond will be designed to contain the same volume of solution. The design criteria are consistent with best practices to provide dual-liner protection to semi-permanent cyanide solution storage areas.
 
Figures 18-6 and 18-7 show common details shared between the two ponds.
 
18.4 FRESHWATER SUPPLY
 
It is anticipated that fresh water will be procured from Barrick’s Cortez Operation located immediately to the south of the Robertson Property. Barrick operates a collection of ponds that are located directly across State Route 306 from the proposed plant facilities.
 
This water should provide a suitable source and quantity to sustain heap leach operations; however, this component of the project is being assessed by others.
 
18.5 WASTE ROCK STORAGE AREA
 
18.5.1 Summary
 
A preliminary location and layout has been developed for the storage of non-reactive mine waste rock. The waste dump is to be located in the centre of the mine site, approximately equidistant from each of the three open pits.
 
A total of 50 Mt of mine waste rock will be mined from the three open pits over a 13 year period. Preliminary waste characterization indicates that it is unlikely that the waste rock is potentially reactive.
 
 
 
Coral Gold Resources Ltd. 18-19 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

18.5.2 Geotechnical Conditions
 
The Waste Rock Storage Area is situated on a north-facing slope south of the deposit area. Vegetation is comprised primarily of scrub brush and grasses.
 
Geotechnical conditions at the proposed Waste Rock Storage Area have not been assessed.
 
18.5.3 Waste Rock Storage Area struction and Operation
 
The following are recommended methods of construction and operation to ensure on-going stability and performance of the Waste Storage Area. These methods may be updated and revised, as necessary, based on field observations and performance monitoring during the initial stages of waste pile construction.
 
Pre-Production:
 
·  
Strip the foundations of the Waste Rock Storage Area prior to loading to remove the topsoil and other deleterious foundation materials
·  
Clear vegetated areas prior to placement of waste materials, and
·  
Construct diversion ditches and runoff collection ditches where required.
 
Operations:
 
·  
Waste/ore material will be transported from the pit using haul trucks. The material will be end dumped and spread by dozers over the crest of the pile.
·  
Load the waste/ore pile in lifts starting at the toe and working progressively upslope. Each lift may be developed at the angle of repose for the material, however, benches should be left along the toe of each successive lift to establish a maximum overall slope angle of 2H:1V.
·  
The lifts should be loaded and developed in a direction parallel to the slope wherever possible to avoid stress concentrations associated with “nose” configurations where the axis of the pile extends outward and perpendicular to the slope.
·  
Trial sections shall be constructed in the field during the initial stages of development to monitor pile stability and foundation performance. The various waste/ore materials should be sampled for characterization and for durability test work to confirm the design parameters.
·  
Waste rock material shall be end dumped over the crest to allow for maximum segregation of the coarser material at the base of each bench.
·  
The construction of sediment control structures consisting of a series of small embankments will likely be required downstream of the waste dump to act as sediment entrapment ponds for runoff from stripped foundation areas and dump surfaces.
 
Additional site investigations will confirm if excavating down to competent bedrock is required. Bedrock is anticipated at shallow depths throughout the Waste Rock Storage Area with an assumed average depth of approximately 10 feet, and will provide a suitable foundation. In areas where the depth to competent bedrock is deeper it may be preferable to stage the waste pile configuration to provide suitable stability by buttressing the toe of the waste pile.
 
 
 
Coral Gold Resources Ltd. 18-20 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
18.5.4 Stability Assessment
 
Stability analyses have not been carried to examine the stability of the proposed waste rock pile. The stability analyses should be carried out using the limit equilibrium modelling application such as SLOPE/W. The program utilizes a systematic search to obtain the minimum factor of safety from a number of potential slip surfaces.
 
The minimum acceptable factor of safety for the waste rock pile under static conditions is 1.3 for short-term operating conditions and 1.5 for long-term conditions (after closure). The consequences of failure of the waste rock pile during an earthquake event are likely to be minimal and restricted to some displacement of the waste pile slopes. There would be a negligible impact on the integrity of the waste pile and little, if any, impact on other Mine site facilities. However, for design of the waste pile a conservative design earthquake corresponding to the 1 in 475 year earthquake event has been adopted with a corresponding mean average maximum acceleration on rock of 0.10-0.15 g.
 
The seismic stability assessment of the waste rock pile should include an estimation of potential seismically induced deformations from the design earthquake. Potential deformations under earthquake loading may be estimated using the simplified methods of Newmark (1965) and Makdisi­Seed (1977).
 
Detailed site investigations and stability analyses will be required for future design studies and prior to development of the Waste Rock Storage Area.
 
18.5.5 Reclamation
 
Preliminary closure requirements for the Waste Rock Storage Area will include on-going monitoring of surface and groundwater quality and flow rates, and periodic inspection of the waste rock dump slopes.
 
Reclamation will be carried out in conjunction with on-going environmental monitoring to ensure that sediment control and water quality objectives are met. The final waste rock bench crests will be rounded to provide long-term stability. The bench tops of the final waste rock dump will be covered with a suitable topsoil layer and re-vegetated.
 
18.6 OPERATIONAL STRATEGY
 
The proposed heap leach pad will be developed in stages. This will minimize initial capital costs while allowing mine operators to maximize efficiency and recovery during leaching. The general operational strategy will involve placing the ore in successive lifts followed by irrigation with leach solutions. The lifts will be placed by conveyor or truck, as appropriate, and spread with dozers. The ore will then be placed in strips parallel to the slope and loaded upslope to ensure ongoing stability and to prevent trafficking over the liner. Proposed bench lifts of 25 feet should be constructed at bench face angles of approximately 1.4H:1V. Berm widths of 36 feet will be left at the toe of each lift resulting in an overall slope of 2.5H:1V. Ongoing pad development will involve extending the composite liner upslope to allow for continued lift placement.
 
Leachate solution will be collected by a series of drainage pipes within the coarse drainage layer at the base of the pad. The drain pipes will connect to main leachate collector pipes for transport to the vertical riser pipe within the potential ponding area.
 
 
 
Coral Gold Resources Ltd. 18-21 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
The sequence of lift placement and leaching will likely be as follows:
 
·  
Place 1.5 inch minus overliner material on the surface of the geomembrane liner to provide liner protection and base drainage.
·  
Place 25 foot lift of ore, as required, by moveable ore transport conveyors or haul trucks. Spread with dozers to establish an evenly graded surface for leaching.
·  
Layout irrigation lines for drip leaching. Sprinkler leaching may also be possible during summer months as part of a rotational, cell-type leach operation.
·  
Cover irrigation lines with ore having a thickness greater than the depth-of-freeze in the fall to prevent freezing during winter operations.
·  
Leach the lift of ore above the irrigation lines prior to loading with the next 25 foot lift.
 
18.7 MONITORING AND RECLAMATION
 
Monitoring and reclamation will be carried out on an ongoing basis to ensure the safe and effective operation of the heap leach facility while minimizing impacts to the surrounding environment. Preliminary recommendations for monitoring and reclamation are summarized below:
 
18.7.1 Monitoring:
 
Surface water quality sampling in surrounding creeks downstream of the facility.
 
Installation of monitoring wells around the facility to monitor groundwater quality during operations and at closure. These wells would be installed prior to development to obtain baseline information for comparative assessment.
 
Installation of an LDRS to monitor and recover any leakage through the liner systems within the solution transfer channels and process water ponds.
 
Slope movement monuments and survey control points will be installed and monitored to ensure the integrity and stability of the ore heap.
 
18.7.2 Reclamation:
 
Grading and re-vegetation of final heap slopes to provide adequate drainage and erosion protection from surface runoff. This may be carried out during operations as the final slope of the heap is developed.
 
Detoxification of the ore at the end of operations.
 
Removal of geosynthetic liners from the heap leach pad areas including pregnant and barren solution ponds as required.
 
Decommissioning of the pregnant solution recovery system.
 
Removal of pregnant solution pond pumps and pipe works.
Application of topsoil and seed mixture to all disturbed areas, as required.
 
Details of the monitoring and reclamation plans will be developed in conjunction with the appropriate regulatory authorities.
 
 
 
Coral Gold Resources Ltd. 18-22 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

18.8 SITE WATER MANAGEMENT
 
18.8.1 General
 
Storm water diversions are required to redirect surface runoff away from mining-related infrastructure and disturbances.
 
18.8.2 Design Storm
 
The Robertson Property is located in central Nevada. The average rainfall intensity for the design of storm water diversion structures utilized data provided by the National Oceanic and Atmospheric Administration’s Point Precipitation Frequency Estimates and the National Weather Service’s Hydrometeorological Design Studies Center. Table 18.2 lists the annual return interval (ARI) events for the region and Figure 18-9 depicts the depth-duration-frequency curves for the project area.
 
Table 18.2: Design Storm Events1
 
   
Annual Return Interval [years]
 
      1       2       5       10       25       50       100       200  
24-hr Precip. Depth [in]
    0.873       1.09       1.39       1.63       1.96       2.22       2.50       2.79  
 
1 Design storm events developed using NOAA Point Precipitation Frequency Estimates
 
 
 
 

 
 
Coral Gold Resources Ltd. 18-23 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
Figure 18-8: NOAA Depth Duration Curves for Project Area1 1 Generated by NOAA Website – Sep. 13, 2011
 
18.8.3 Design Methodology
 
A hydraulic analysis was carried out for mine site to determine the storm water runoff volumes and flow rates for sizing on site diversion channels. The SCS curve number method presented in the United States Department of Agriculture (USDA) Technical Release 55 (TR-55) Urban Hydrology for Small Catchments was used for the analysis.
 
 
 
 
Coral Gold Resources Ltd. 18-24 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
18.8.3.1 Catchment Characteristics
 
It is anticipated that the mine site footprint will be approximately 1,500 acres. The hydrologic characteristics of the on-site soils are currently undefined; therefore a curve number (CN) of 70 was assumed for analysis based on the following assumptions:
 
· Soils in the site belong to hydrologic soil group D.
· Vegetation at the site consists of sagebrush with grass understory in fair condition.
 
Disturbed areas were assessed a CN value of 80, while the waste rock storage area and heap leach pads were given CN values of 70.
 
18.8.3.2 Channel Geometry
 
In order to determine the appropriate size of the storm water diversion channels the peak runoff from the hydrologic analyses was used to determine the capacities. For analysis it was assumed that all channels will be designed with 2H:1V side slopes and minimum longitudinal slopes of 1%. Channel roughness was assumed to correspond to a Manning’s coefficient of 0.025 based on relatively smooth constructed channel conditions.
 
18.8.3.3 Design Flow and Channel Capacity
 
Table 18.3: Channel Design
 
   
Design Flow by Return Period [cfs]
   
Channel
    2       5       10       25       50       100       200  
Design Depth [ft]1
Waste Rock Dump Toe
    0.2       2       5       15       26       40       57  
1.5 + 1.0 = 2.5
South Diversion
    0.2       0.9       3       8       15       23       33  
1.5 + 1.0 = 2.5
North Diversion
    0.1       0.7       3       8       15       23       32  
1.5 + 1.0 = 2.5
LG Solution Collection2
    0.3       1.5       4       11       17       26       37  
2.0 + 3.0 = 5.0
HG Solution Collection2
    0.3       1.7       5       13       21       31       44  
2.0 + 3.0 = 5.0
 
1 All conveyance ditches sized to convey the 100 year discharge plus 1.0 ft freeboard.
2 Solution transfer channels sized to convey 100 year discharge plus 3.0 ft freeboard.
 
18.8.3.4 Event Pond Design
 
The event pond is hydraulically connected to the pregnant solution pond via a broad-crested overflow located along the east side of the pregnant solution pond. The overflow is sized to convey flows in excess of the 25-year storm event of 24 hours duration.
 
The pond will be maintained in dry condition to provide contingency storage in the event of a large storm water event or to accommodate planned or unplanned draindown of either or both heap leach pads. Once the given event has passed, the solution will be pumped to the ADR plant for gold recovery and cyanide detoxification if required.
 
 
 
Coral Gold Resources Ltd. 18-25 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
18.9 ELECTRICAL SUPPLY AND DISTRIBUTION
 
18.9.1 Summary
 
This portion of the project Preliminary Economic Analysis (PEA) covers electrical power, control and communications aspects and includes both capital and operating costs.
 
This electrical report is based on the development of a 40,000 ton per day surface mine and processing facility. The cost estimates are expressed in US dollars and are based on constant 2011 prices.
 
The proposed facilities covered by the electrical PEA include the mine (mining equipment, dewatering pumping (if required) and portable lighting will be diesel powered) and surface facilities including a crushing plant, ore conveyors, leach pads, ponds, ADR plant, fresh water pumping and ancillary buildings consisting of a gate house, offices, warehouse, dry, workshop/service garage and fuel storage.
 
Electrical power will be supplied by NV Energy (formerly Sierra Pacific Power Company). In 2017, it is planned to establish a 25 kV service via a tap from an existing nearby 120 kV line, a 120 - 25 kV substation and two miles of 25 kV distribution line.
 
The Robertson Project’s service point will be located at a main site substation to be built and owned by Coral Gold adjacent to the ADR Plant. The main substation will include NV Energy’s revenue metering, two step-down transformers and the main secondary 4.16kV distribution switchgear. This switchgear will then distribute power to the various load centers around the site via buried cable to nearby loads and overhead lines to more distant loads, e.g. crushing, pregnant solution and fresh water pumping and the mine workshop. To provide power during a utility outage, an emergency generator will be installed to allow an orderly shutdown of the plant, ongoing communications, and freeze protection.
 
Electrical services will be generally designed and built to current North American best available technology standards and will include grounding, lighting, security, small power, welding, heating, process power, process control, instrumentation, fire protection, site and off-site communications systems. For this study, all materials and equipment have been assumed to be new.
 
18.9.2 Introduction
 
This section of the report has been prepared by Kaehne Consulting Ltd. (KCL) of North Vancouver, BC under the direction and at the request of Beacon Hill Consultants (1988) Ltd., consultants to the project, who are conducting the overall Preliminary Economic Analysis (PEA) of the Robertson Project near Crescent Valley, Nevada on behalf of Owners, Coral Gold Resources Ltd. (Coral).
 
The purpose of this report is to provide a PEA of the design, capital and operating cost of electrical power supply, distribution and services for the Robertson project based on development of a surface mine, crushing, conveying, leach pads, pumping, processing plant and ancillary buildings.
 
18.9.3 Electrical Power Supply
 
The Robertson project is estimated to have a peak electrical load demand (15 minute thermal average) of 2 MW, a load factor of 0.8 and an average annual energy consumption of 14 GWh.
 
 
 
Coral Gold Resources Ltd. 18-26 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


Average power factor will be 0.95 lagging or better, achieved with power factor correcting capacitors.
 
Electrical power supply will be provided by NV Energy who will develop a new tap from a nearby 120 kV transmission line, install a 120 - 25 kV step-down substation near the tap, and run two miles of new 25 kV distribution line to a new main substation near the project main entrance and gate house. NV Energy has provided a preliminary capital estimate of $1 million to cover this work.
 
Coral will build and own a 25 - 4.16 kV main site substation and the downstream 4.16 kV three phase distribution system from the service point at the main substation to various load centres around the property.
 
NV Energy has indicated that the addition of the Coral load of 2 MW to the existing 120 kV transmission system is most likely possible under present system loading conditions. They do advise, however, that before their offer can be considered firm, a system study would be required at a possible cost to Coral of about $20,000. In our opinion, this is normal utility practice and is considered reasonable.
 
Correspondence has been done with NV Energy to determine the details of the GS3 tariff applicable to Coral and their calculation of the present average unit cost of energy that would apply. Note that the GS3 tariff is a “time of use” tariff, meaning that the rate changes with summer and winter seasons and on-, mid-, and off-peak daily periods.
 
18.9.3.1 Main Site Substation
 
Coral will build and own a new main site substation consisting of twin 1.5/2.0 MVA 25 - 4.16 kV three phase outdoor power transformers complete with primary isolation and protective devices. NV Energy’s revenue metering will be located here and check metering may be installed if desired. Either one of the main transformers will have sufficient capacity to carry the plant load at its forced cooling rating. A line-up of secondary 4.16 kV switchgear will provide the source for various power feeders to the mine, crushing, ADR plant, pumping, ancillary buildings and miscellaneous loads.
 
 
 
Coral Gold Resources Ltd. 18-27 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


Figure 18-9: Overall Power Distribution Layout
 
 
 
 
Coral Gold Resources Ltd. 18-28 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Figure 18-10: Electrical Single Line Diagram

 
 
 
Coral Gold Resources Ltd. 18-29 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


18.9.4 Electrical Distribution
 
Power will be distributed from the main site substation at 4.16 kV, three phase, 60 Hertz to load centres via overhead power lines or cable feeders mounted on ladder trays or buried underground, as appropriate. Local to each load centre, a unit substation will step power down to 480 volts and lower for general consumption. Overhead power lines at 4.16 kV will extend to the mine area, crushing and freshwater pumping.
 
18.9.5 Process Drive Motors
 
Process drive motors will be totally enclosed fan cooled (TEFC), high efficiency. These motors have been priced as part of the mechanical equipment they drive and are not included in this portion of the cost estimates. With the exception of the 200 HP crusher motors which will be 4 kV, all other process motors will be 460 volt three phase or, for small auxiliary motors, 120/208 or 120/240 volts. Larger drives will include power factor correction via static capacitors.
 
18.9.6 Grounding
 
The main substation will be provided with an overall ground grid, gradient control mats where required and structure and fence grounding systems. Overall ground resistivity is limited to 1 ohm to ensure acceptable touch-and-step potentials. If necessary, a remote ground electrode will be used. All buildings and major outdoor structures will be connected to a buried grounding system with a maximum resistance to ground of 5 ohms. This may be achieved with grounding rods or few deep holes with copper piping installed.
 
18.9.7 Lighting
 
Lighting will be provided to meet safety and statutory requirements. Highbay discharge lighting will be used in process and service buildings with a mounting height of 20 feet or more. Lowbay vapourtight discharge lighting will be provided in other process and service areas, fluorescent lighting in offices, control rooms and similar. Exit lights will be provided where required. Emergency lighting will provide minimal lighting for safe egress in event of a power failure. Outdoor lighting will be provided where required from fixtures mounted on building exteriors. Pit lighting will be provided by mobile trailer-mounted units.
 
18.9.8 Fire Detection & Suppression
 
POC (products of combustion) and ROR (rate of rise) detector heads will be installed in transformer rooms, electrical rooms and control rooms. No sprinkling is permitted in these areas. Suppression systems will be either CO2 or halon replacement, manually operated.
 
18.9.9 Security
 
An allowance has been made for surveillance/security systems consisting of cameras and monitoring equipment. It is expected that all site security will be located at the guardhouse located at the main property entrance.
 
18.9.10 Process Control / Instrumentation
 
The main elements of the process control equipment will be controlled/monitored through a fully redundant PC based HMI (Human-Machine Interface) similar to Wonderware’s Factory Suite and will be centralized at a control room in the ADR building. Control will be PLC based and will not have manual override.
 
 
 
Coral Gold Resources Ltd. 18-30 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Conveyors will have standard control devices: emergency pull cord switches, belt misalignment switches, speed and plugged chute switches where applicable.
 
The primary ore conveyor will have a weightometer. Process water tanks will have continuous level monitoring with ultrasonic level transmitters.
 
18.9.11 Plant Site Communications
 
An allowance has been made for an in-plant intercom system. This will be a self-contained system with multi-channel selective calling.
 
Allowance has been made for telephone, data and internet communications to and from the Robertson project site.
 
18.10 OTHER SURFACE INFRASRUCTURE
 
18.10.1 Transportation of Doré Bars
 
The transportation of the gold doré bars does not pose any concerns. It is likely that they would be transported to Bratislava by a security truck specially designed for carrying small value loads. Security personnel trained for this purpose will travel with the truck.
 
18.10.2 Fuel Storage
 
Fuel storage requirements at the site have been estimated at 500,000 liters based upon an average one-month consumption. Access to the site is available at all times, thus delivery of fuel would be on a regular schedule.
 
18.10.3 Explosive Storage
 
Minimal explosives will be stored on site since access to explosives in the area on a regular basis is feasible. 18.10.4 Warehouse/Shops
 
The warehouse will be 67ft (20 m) wide x 140ft (42 m), and will include offices. The maintenance facilities will have two service bays, a wash bay, a tire repair bay, small truck repair bays, offices, and a shop area.
 
18.10.5 Administration Building / Security and Gatehouse
 
The administration building consists of a two-storey building designed to provide sufficient area for the projected staff and associated persons.
 
The security building will have sufficient facilities to store emergency vehicles and serve as a gatehouse. Figures 18-9 through 18-15 outline the proposed surface ancillary facilities.
 
 
 
Coral Gold Resources Ltd. 18-31 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
 
 
 
Coral Gold Resources Ltd. 18-32 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
 
 
Coral Gold Resources Ltd. 18-33 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


 
 
 
Coral Gold Resources Ltd. 18-34 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


Figure 18-17: Fuel Storage and Distribution Station – General Arrangement Plan and Elevation

 
 
 
Coral Gold Resources Ltd. 18-35 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


SECTION 19.0 MARKET STUDIES AND CONTRACTS
 
There have been no market studies completed and there are no contracts.
 
Gold Dore bar will be the product produced from this mining operation which has a ready market at the prevailing metal prices.
 
 
 
 
Coral Gold Resources Ltd. 19-1 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
SECTION 20.0 ENVIRONMENTAL STUDIES, PERMITTING AND SOCIAL OR
 
COMMUNITY IMPACT
 
20.1.1 Introduction
 
SRK Consulting (U.S.), Inc. (SRK) has prepared this environmental section for the Robertson Project Preliminary Economic Assessment. The work scope submitted to Beacon Hill Consultants (1988) Ltd. Identified the elements that are included in this document:
 
·  
Coordinate with the Beacon Hill team members regarding the mine plan and processing to assess the types of permits required for the anticipated operations;
·  
Review current permits and additional permits required to bring the project into full production;
·  
Create a permitting time line for future mining; and
·  
Review of current environmental liabilities, and assessment of requirements to bring to meet state and federal regulations.
 
List of Abbreviations
 
ABA Acid Base Accounting
BLM Bureau of Land Management
BMRR Bureau of Mining Regulation and Reclamation
BSDW Bureau of Safe Drinking Water
BWPC Bureau of Water Pollution Control
BWM Bureau of Waste Management
EA Environmental assessment
EIS Environmental impact statement
ET Evapotranspiration
FPPC Final Plan for Permanent Closure
HCT Humidity Cell Test
MLFO Mount Lewis Field Office
MWMP Meteoric Water Mobility Procedure Test
NDEP Nevada Division of Environmental Protection
NEPA National Environmental Policy Act
NDOW Nevada Department of Wildlife
NRHP National Register of Historic Places
SWPPP Stormwater pollution prevention plan
 
The Project area consists of approximately 7300 acres, of which 169 acres are private lands, held as patented mining claims either owned or controlled by Coral Gold Resources, Inc. (Coral). The remaining 7131 acres are public lands administered by the BLM Mount Lewis Field Office (MLFO) in Lander County; Coral controls approximately 601 unpatented lode and placer claims on these public lands.
 
This mixed estate makes the MLFO the primary agency for authorizing mining activities on public and private land; the MLFO works with the Nevada Division of Environmental Protection – Bureau of Mining Regulation and Reclamation (BMRR) under a memorandum of understanding to authorize mining on projects on both public and private lands.
 
The Robertson Project was developed in the Tenabo Sub-district of the Bullion mining district, which has been the focus of historic and modern mineral development operations. The historic operations, which began in 1869, are comprised primarily of underground and placer operations while the modern facilities have been focused primarily on open pit/heap leach facilities in the western portion of the district.
 
 
 
Coral Gold Resources Ltd. 20-1 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

The Project area was first mined in 1905, and the town of Tenabo was founded. Placer gold was discovered in 1907 and again in 1916, but significant production did not begin until 1931. Since that time, mining has been limited, and production has been small. Coral operated the Robertson Mine in 1988 and 1989. The site is presently in post-closure monitoring; however, exploration activities have continued. Reclamation activities associated with previous mining disturbance as well as recent exploration disturbance have been ongoing. The site also has extensive mining-related disturbance by other parties.
 
20.1.2 Authorized Exploration Activities
 
Exploration operations on public lands administered by the MLFO have been authorized under the previous Plan for the Robertson Project (Plan) (NVN-067688 submitted in September 1986 and subsequently
modified in June 1990, January 1991, July 1997, October 2003, September 2004, May 2006, and November 2007) and under a Notice of Operations (Notice) for the Try-View Project (NVN-087413 authorized June 8, 2009). The BMRR issued Reclamation Permit #0055 to cover this disturbance.
 
Coral is authorized to create 211.5 acres of surface disturbance under the Plan and reclamation permit for the Robertson Project and 2.45 acres of surface disturbance under the Notice for the Try-View Project, for a total of 214 acres. The site also has extensive mining-related disturbance by other parties of which Coral has elected to reclaim some portions.
 
To date, about 19 acres of waste rock dump and 13 acres of process area have complete surety release leaving about 214 acres that have not been entirely reclaimed and released. Of these 214 acres, about 39 acres are associated with roads and 11 acres are associated with exploration.
 
Table 20.1: Authorized and Existing Disturbance
 
Disturbance Type
 
Pre-2008
Public
(acres)
   
Pre-2008 Private (acres)
   
2008
Authorized
Public
(acres)
   
2008
Authorized
Private
(acres)
   
Surety
Release
(acres)
   
Total
Reclamation
Obligation
(acres)
 
Pits
    19.9       0.0       0.0       0.0       0.0       19.9  
Waste Rock
Dumps1
    53.5       0.0       0.0       0.0       18.7       34.8  
Process
Areas2
    51.5       0.0       0.0       0.0       12.8       38.7  
Roads
    36.3       2.6       0.0       0.0       0.0       38.9  
Exploration
    0.8       0.1       9.7       0.7       0.0       11.3  
General3
    61.9       6.0       0.0       0.0       0.0       67.9  
Other4
    0.0       0.0       2.2       0.0       0.0       2.2  
TOTAL
    223.9       8.7       11.9       0.7       31.5       213.7  
 
1 Includes the Placer Gravel Dump.
2 Includes the main heap leach pad, the former Gold Quartz pad, the plant yard and ponds, the freshwater reservoir, and the Triplet Gulch pad grubbed area.
3 Includes general disturbance around the site including the “A” – “D” surface disturbances.
4 Previously categorized as disturbance by others that Coral recontoured and now assumes reclamation responsibility.
 
 
 
Coral Gold Resources Ltd. 20-2 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

The bond amount that is presently obligated to reclaim the 214 acres of disturbance is US$352,934.
 
Coral is presently constrained on disturbance associated with exploration activities as the allotted acreage and number of holes and pads authorized in the 2007 Plan amendment. The authorized disturbance included 10.4 acres for 50 drill sites and sumps as well as cross-country travel and new roads.
 
In addition to the water pollution control permit, the reclamation permit, and BLM authorization, Coral presently maintains a general stormwater permit with a stormwater pollution prevention plan.
 
20.1.3 Proposed Exploration Activities
 
An amended Plan and reclamation permit application was submitted to the MLFO and BMRR in April 2010 and was then withdrawn at the MLFO’s suggestion to incorporate a different strategy. The revised Plan was re-submitted to the MLFO and BMRR in November 2010 and has undergone multiple MLFO reviews. This Plan proposes an additional 80 acres of disturbance associated with exploration and baseline data collection activities; the Try View notice will be rolled into this action, and the notice will be retired
 
An environmental assessment (EA) will have to be prepared to analyze potential environmental impacts associated with the proposed drilling activities. Baseline data collection for threatened and endangered plant and animal species has been completed, and Class III cultural resource surveys are underway. According to the cultural resources consultant, Kautz Environmental, Inc., the area contains numerous cultural resources that may be eligible for the National Register of Historic Places (NRHP) (personal comm. B. Malinky). Further, the Gylding Pit contains an eagle nest which has potential ramifications for curtailing exploration and mining activities within a buffer zone during the nesting season.
 
The May 2011 Plan responding to the MLFO comments has been re-submitted and has been deemed complete, so the EA can be formally initiated. This process usually takes six to eight months to complete; however, the MLFO presently has a staff shortage, so work on some projects has been delayed indefinitely. The best case scenario is that the EA can be initiated in July 2011 and be completed in seven months.
 
20.1.4 Future Mining
 
20.1.4.1 Conceptual Plan
 
A conceptual mining plan was provided that depicted the following facilities:
 
· three pits: Gold Pan, Porphyry, and Altenburg Hill;
· a waste rock dump;
· a low grade heap and a high grade heap; and
· a transmission line.
 
Other components that will be needed include:

 
 
Coral Gold Resources Ltd. 20-3 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
· haul and secondary roads;
· processing facilities and solution ponds;
· water wells, pipelines, and water storage;
· shops, warehouse, and fuel and reagent storage;
· sanitary facilities and potable water;
·  growth media stockpiles, borrow areas, fencing, exploration, power lines, landfill, and stormwater controls.
 
Because the future mine will be located on both public and private land, federal, state, and local permits will have to be acquired as shown in Table 20.2.
 
 
 
Coral Gold Resources Ltd. 20-4 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Table 20.2: Summary of Major Permits for Future Mining
 
Agency
Permit Name
Nevada Division of Environmental Protection
Bureau of  Mining Regulation and Reclamation
· Water Pollution Control Permit
· Reclamation Permit
Bureau of Air Pollution Control
· Class II Permits to Construct and Operate
· Mercury Permit
Bureau of Water Pollution Control
· General Stormwater Permit
· Septic Permit
Bureau of Safe Drinking Water
· Potable Water Permit
Nevada Division of Water Resources
State Engineer
· Permit to Appropriate Water
Division of Dam Safety
· Permit to Construct Dam
Nevada Department of Wildlife
 
· Industrial Artificial Pond Permit
Federal Permits
Bureau of Land Management – Mount Lewis Field Office
· Decision Record/Finding of No Significant Impact
Bureau of Alcohol, Tobacco, Firearms, and Explosives
· Authorization to store and use explosives
Environmental Protection Agency
· Hazardous Waste ID No. (small quantity generator)
Lander County
 
· Special Use Permit

 
 
Coral Gold Resources Ltd. 20-5 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


20.1.5 Federal Permitting
 
A mine plan of operations (Mine Plan) will have to be prepared to describe the construction, operation, reclamation, and closure of each facility along with a bond cost estimate that presents the reclamation and closure costs.
 
The Plan has to provide sufficient detail in order to identify and disclose potential environmental issues during the National Environmental Policy Act (NEPA) review, which will require the preparation of an environmental assessment (EA) or environmental impact statement (EIS).
 
The primary difference between the two types of documents is that an EA is prepared when no significant impacts are expected or the potential impacts are unknown. An EIS acknowledges the potential for significant impacts to occur, and analyzes and discloses what those potential impacts are. The BLM will look at several triggers to determine whether an EA or an EIS is the most appropriate document to disclose potential environmental impacts.
 
Because the Coral Project area is in such close proximity to the Cortez Gold Mines, the BLM may consider the development and operation of the mine to be significant. Based on recent experience the BLM will likely require an EIS due to the potential for cumulative impacts.
 
There are potential issues and risks of preparing and EA in lieu of an EIS. The greatest risk is that an EA is imminently more appealable than an EIS. It is far easier to appeal an EA than and EIS. Due to the size of the environmental footprint of the project and the general opinion that the EIS route is the likely requirement by governmental agencies this approach forms the basis for approval process for this project.
 
Recent experience in the Battle Mountain District indicates it is likely that an EIS for a mining/mineral processing project will take at least 36 months. The process is controlled by internal BLM situations that are beyond the control of the project proponent, and also a number of potential external events such as public or cooperating agency opposition that could, and often do, delay the EIS schedule. Thus, it is not uncommon for a mining EIS to take three to five years.
 
The MLFO is requiring that at least one year of baseline data be submitted with the Plan of Operations/Reclamation Permit Application. The ongoing cultural resources survey is expected to be completed in the fourth quarter of 2011, which will be a major milestone in baseline data acquisition.
 
Long-lead items that must be considered include groundwater sampling in the project area for depth and quality for use in the NEPA analysis and water pollution control permit application. Geochemical characterizations of waste rock, ore, and spent ore are another study that should be started as soon as possible and include acid base accounting (ABA), meteoric water mobility procedures (MWMP) testing, and humidity cell (HCT) testing. The geochemical characterization program must be approved in advance by the BLM and the NDEP.
 
Table 20.3 presents a listing of the types of studies that should be undertaken during the mine planning phase and in advance of the NEPA process; these studies will also be used to support the acquisition of other permits.

 
 
Coral Gold Resources Ltd. 20-6 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


Table 20.3: Future Baseline Studies
 
 
Permit/Authorization
Investigations/Studies
Estimated Range of Costs
Water
NEPA Analysis
 
Water pollution control permit
 
Stormwater control
Monitor surface watersin project vicinity on a seasonal basis for quality and quantity
 
Monitor groundwater for level and water quality especially in the pit, dump, and heap areas to collect baseline quality data
$10,000 – $30,000
Geology and
Geochemistry
NEPA Analysis
 
Water pollutioncontrol permit
 
Waste rock dump design
 
Dump and heap closure
 
Closure planning for dumps, heaps, and tailings
Collect  representative samplesof waste rock, ore, and spent heap ore for geochemical characterization (acid base  accounting, Meteroric Water Mobility  Procedure testing, and humidity cell testing
 
Condemnation drilling in proposed locations of facilities
Costs will be dependent on the number of samples analyzed for ABA, MWMP, and HCT $20,000 - $50,000
Cultural Resources
NEPA Analysis
Conduct a Class III survey in previously unsurveyed or as directed by the MLFO1
 
Mitigate sites that cannot be avoided
Mitigation costs are unknown at this time but could be as high as $50,000/site
Biological baseline
NEPA analysis
Determine presence or absence of threatened, endangered, or special status plant and animal species including golden eagles in previously unsurveyed areas1
 
Determine presence or absence of game species
 Will have to survey for raptors in a 10-mile radius, but may be able to use info from nearby mines.
 
1These studies will have been completed for the exploration EA.
 
Other federal permits that may have to be acquired include a hazardous waste identification number from the U.S. Environmental Protection Agency and an explosives use permit from the Bureau of Alcohol, Tobacco, Firearms, and Explosives.
 
 
 
Coral Gold Resources Ltd. 20-7 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
20.2 STATE PERMITTING
 
The state of Nevada requires a number of permits for mining operations as shown in Table 20.4.
 
Table 20.4: State Permits for Future Mining
 
Permit
Agency
Comments
Air Quality Operating Permit
Bureau of Air Quality Control
Will need permits for surface disturbance, crushers,
thermal processes and mercury if the mercury in the ore exceeds the de minimis level of 5 pounds per year
Water Pollution Control Permit Modification
BMRR
Covers pits, dumps, heaps, process ponds
Mining Reclamation Permit
BMRR
Addresses reclamation and disturbance
Permit to Appropriate Waters
Nevada Division of Water Resources
Will have to acquire permit to appropriate sufficient water to support heap leaching operation; may be able to acquire water from Barrick
Approval to Operate a Solid Waste System (Class III Waivered Landfill)
Bureau of Waste Management
An on-site landfill will be available to dispose of industrial solid waste
Stormwater NPDES General Permit (SWPPP)
Bureau of Water Pollution Control
Stormwater must be controlled and contained if contacted with process components
Permit to Construct Dam or Impoundment (Dam Safety Permit)
Nevada Division of Water Resources
Will need if a process pond impounds more than 20 acre-feet of water or is more than 20 feet deep
Industrial Artificial Pond Permit
Nevada Department of Wildlife
For any process ponds
Potable Water Permit
Bureau of Safe Drinking Water
A potable water system must be installed for employees; bottled water is not an acceptable alternative
Septic System Permit
Bureau of Water Pollution Control
 
Liquefied Petroleum Gas License
NV Board of the Regulation of Liquefied Petroleum Gas
If LPG is stored and used on the site
Hazardous Materials Storage Permit (State Fire Marshal)
State Fire Marshal
 

20.2.1 Local Permitting
 
A special use permit will have to be acquired from Lander County; usually a copy of the Plan of Operations is sufficient information for the County to review and issue a permit.

 
 
Coral Gold Resources Ltd. 20-8 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
20.2.1.1 Schedule
 
The time to acquire permits is expected to be on the order of four years as the MLFO is now requiring a year of baseline data collection prior to submitting the Plan of Operations and Reclamation Permit Application. Much of the data has been collected or will be completed by the fourth quarter of 2011; however, the MLFO may request groundwater sampling to determine the depth and quality of water in the project area.
 
The EIS process is expected to take on the order of 36 to 48 months based on experience on Nevada over the last 10 years.
 
20.2.2 Liabilities Historical Workings
 
The Robertson Project area has been mined since 1905 with many features left from that time. These artifacts not only include surface disturbance but also old features from processing. Liabilities associated with surface disturbance and feature related primarily costs and delays from having to mitigate site potentially eligible for the NRHP. The processing facilities constructed prior to environmental regulation may be associated with contaminated soils petroleum, mercury; however, signs of petroleum spills were not evident during the site walk on September 17, 2010.
 
Numerous underground openings can found within the Project area. No liability exists provided Coral does not use these as part of their exploration or mining. If underground openings are used, Coral will be responsible for fencing the openings to prevent inadvertent access.
 
A review of the Nevada Bureau of Corrective Actions web database did not identify active corrective actions as of April 28, 2011 or closed corrective action cases from 1990 and April 28, 2011.
.
Fresh Water
 
The heap leaching facilities will require at a minimum several hundred gallons per minute of fresh make-up water. The Crescent Valley hydrographic sub-basin is presently over allocated with most of the water allotted for mine dewatering. Acquiring water rights under these circumstances may be difficult; however, Coral may be able to negotiate with Barrick Cortez Mines to purchase excess dewatering water.
 
Eagle Nest
 
A golden eagle nest is located in the Gylding Pit; this nest has been known to be active within the last several nesting seasons. Golden eagles have recently come under closer scrutiny by the U.S. Fish and Wildlife Service and subsequently the BLM.
 
Bald and golden eagles are protected under the Bald and Golden Eagle Protection Act (Act) (16 ISC 668-688d). The Act prohibits the taking or possession of and commerce in bald and golden eagles, parts, feathers, nests, or eggs with limited exceptions. The definition of “take” includes pursue, shoot, shoot at, poison, wound, kill, capture, trap, collect, molest, or disturb. “Disturb“ means to agitate or bother a bald or golden eagle to a degree that causes, or is likely to cause, based on the best scientific information available:

 
 
Coral Gold Resources Ltd. 20-9 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
·  Injury to an eagle;
·  A decrease in its productivity by substantially interfering with normal breeding, feeding, or sheltering behavior; or
·  Nest abandonment by substantially interfering with normal breeding, feeding, or sheltering behavior.
 
Further , Instruction Memorandum 2010-156, Bald and Golden Eagle Protection Act – Golden Eagle National Environmental Policy Act and Avian Protection Plan Guidance for Renewable Energy has been adopted by the BLM for mining activities on public land. This guidance requires the BLM to consider direct, indirect, and cumulative effects be considered. Best management practices and avian protection plans have to be developed to prevent or reduce impacts to golden eagles. Surveys will have to be conducted prior to ground disturbance in the breeding and nesting seasons to determine the presence or absence of eagles as well as other migratory avian species protected under the Migratory Bird Treaty Act. If nesting or brooding eagles are determined to be present, Coral would have to avoid the area using a buffer zone developed in coordination with the BLM and/or NDOW biologists. Some mines in the area are required to use a ten-mile buffer zone.
 
The presence of nesting and foraging habitat may limit future exploration and mining during the nesting season. Because the U. S. Fish and Wildlife Service and the BLM are presently determining the scope of the protection measures that will be required, the effect to mining operations cannot be ascertained.
 
Native American Concerns
 
The Western Shone Tribe and Great Basin Resource Watch continue to protest against the U.S. government (BLM) and the presence of the Barrick Cortez mines. This dispute is long-standing, but is unlikely to affect Coral’s existing and proposed operations. Other nearby mining operations such as Klondex Mines Limited’s Fire Creek Mine have not encountered concerns from the Native Americans during the permitting process.
 
Cultural Resources
 
The Project area contains many prehistoric and historic sites that are eligible for the NRHP. Ideally, Coral will avoid eligible sites and by doing that, save on time and expense. Sites cannot be mitigated until the NEPA process is complete, and construction will have to wait until the field work is completed and the BLM issues a Notice to Proceed. Based on correspondence with Margo Memmott (Kautz Environmental), at least two of these sites are likely to occur within the area of proposed disturbance.
 
Proximity of Cortez Gold Mines
 
The Robertson Project area is in close proximity to Barrick Cortez Inc.’s Cortez Gold Mines (Cortez). This operation is one of the largest open pit/underground mine complexes in Nevada. Numerous EIS’s have been prepared over time to document baseline conditions and potential impacts from the operations. The proximity to Cortez offers some unique advantages:
 
 
 
Coral Gold Resources Ltd. 20-10 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property
 
 
·      The baseline conditions are well-documented and can be used to supplement future NEPA analysis performed by Coral;
·  Social and economic conditions are well known in Crescent Valley as a result of past studies;
·  The hydrologic regime is well-studied;
·      Cortez must dispose of dewatering water not utilized in their process. Coral may consider approaching Cortez to see about acquiring a portion of the dewatering water;
 
Claims by Others
 
Presently, two claim blocks held by others but without use agreements are located adjacent to and overlap into some of the proposed development areas. SRK understands Coral has attempted to negotiate agreements with the owners (Newmont and John Filipini) for use of the claims. Although the developments can be redesigned to avoid these claims, the presence of these claims without a use agreement is likely to cause problems for Coral in the future. The BLM and the BMRR will closely review the original mine plan and subsequent amendments with an eye to ensuring these claims are not affected by Coral’s development. The claim owners will have to be notified of each proposed activity and subsequent amendments before the agencies will proceed with approvals
 
Mercury
 
The limited MWMP tests conducted did not identify mercury as occurring over the Nevada water quality standards. The Nevada Mercury Control Program (NMCP) is a state regulatory program that requires mercury emissions controls on thermal units located at precious metal mines. The program achieves mercury reduction via add-on control technologies. At this time, the NMCP regulations focus on the potential for mercury emissions from thermal processing units only.
 
At the core of the NMCP is "NvMACT." NvMACT is the Maximum Achievable Control Technology designated by the NDEP in accordance with NAC 445B.3677. Pursuant to NAC 445B.3625, owners or operators that operate, construct or modify a thermal unit that emits mercury must apply for, and obtain, a mercury operating permit to construct. Construction of a new or modified thermal unit that emits mercury requires a permit before construction begins.
 
A brief review of some available data indicated mercury appears to occur if fairly low concentrations. A mercury operating permit will not be necessary if Coral can demonstrate that less than five pounds per year of mercury will be processed.
 
Long Term Trust Fund
 
The MLFO is presently asking about long term trust funds (LTTF) for mining and exploration projects and implying that an LTTF is necessary. In the past, an LTTF was used to cover uncertainties identified during an EIS process. The MLFO has been considering LTTFs in conjunction with the reclamation bond instead of as a contingency; the reclamation bond already contains a ten percent contingency in the indirect costs. Coral may be asked to provide additional funds in an LTTF for the Robertson Project if uncertainties are identified during the NEPA process.

 
 
Coral Gold Resources Ltd. 20-11 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


SECTION 21.0 CAPITAL AND OPERATING COSTS 21.1 CAPITAL COSTS
 
21.1.1 Introduction
 
The capital costs for the Owner operated alternative have been estimated based upon budget quotes from suppliers, Costmine Mining Cost Data (Infomine USA Ltd.) and in house data. The contractor operated (Alternative 1) capital cost estimate mirrors the Owner operated cost and excludes that mining equipment as provided by the contractor.
 
21.1.2 Basis of Estimate
 
The cost of mobile equipment is based upon budget vendor pricing of new equipment for a recent North American project and from in-house files. All other equipment prices have been based on the cost of new equipment
 
The purchase of trucks has been timed to reflect the requirements throughout the mine life.
 
The equipment requirements were derived from the proposed mine plan and projected equipment performance criteria. Costs for replacement equipment were included as ongoing capital throughout the mine life.
 
All costs are expressed in fourth quarter 2011 US dollars, with no allowance for escalation, interest during construction, taxes, or duties. Rates of exchange are stated as CDN$1.00 to US$1.00. A 15% contingency has been added to the estimate to allow for unforeseen capital requirements and overruns.
 
21.1.3 Cost Summaries
 
A summary of initial capital expenditures and ongoing capital costs are shown below.

 
 
Coral Gold Resources Ltd. 21-1 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


Table 21.1: Initial Capital Expenditures – Base Case (Owner Operator)
 
Description
 
2012
2013
2014
2015
2016
2017
   
-6
-5
-4
-3
-2
-1
Project Development
             
Royalty Payment and Fees
 
$176
$176
$176
$176
$176
$84
Environmental
 
$264
$341
$501
$330
$391
 
Exploration
 
$2,817
$1,000
$1,000
     
Metallurgical Test Work
 
$900
         
Prefeasibility Study
   
$1,495
       
Definition Drilling
     
$900
     
Metallurgical Test Work
     
$500
     
Full Feasibility
       
$2,019
   
Detail Design
         
$1,050
 
Purchase of Royalty
           
$1,250
Sub-total
 
$4,157
$3,012
$3,076
$2,525
$1,616
$1,334
Plant and Surface Facilities
             
Crusher and Screening Plant
           
$11,243
Stacker, Conveyors & Silo
           
$5,102
Leach Pad and Ponds
           
$11,058
ARD Plant
           
$3,881
Yard Facilities
           
$3,503
Heavy Mobile Equipment
           
$1,170
Buildings & Structures
           
$4,151
Fuel supply
           
$500
Explosive Magazine
           
$150
Sub-Total Direct
           
$40,758
Mining
             
Equipment
           
$23,498
Pre-production Development
           
$7,603
Sub-total
           
$31,102
Services
             
Power Line
           
$1,000
Power Sub Stations
           
$1,250
Diesel Generation
           
$250
Power Distribution
           
$1,195
Water Distribution
           
$250
Sewage
           
$100
Sub-total
           
$4,045
Total Direct Capital Costs
 
$4,157
$3,012
$3,076
$2,525
$1,616
$77,238
Indirect Costs
             
Engineering and Procurement
7.00%
         
$5,407
Construction Management
5.00%
         
$3,862
Construction Indirects
5.00%
         
$3,862
Freight
2.00%
         
$1,545
Start-up and Commisioning
1.00%
         
$772
First Fills and Capital spares
7.00%
         
$5,407
Sub-total
           
$22,399
Total without Contigency
 
$4,157
$3,012
$3,076
$2,525
$1,616
$99,637
Contingency
15.00%
$624
$452
$461
$379
$242
$14,946
Total Initial Capital
 
$4,780
$3,464
$3,538
$2,903
$1,859
$114,583

 
 
Coral Gold Resources Ltd. 21-2 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property


Table 21.2: Initial Capital Expenditures - Alternate 1 (Contractor Operator)
 
Description
 
2012
2013
2014
2015
2016
2017
   
-6
-5
-4
-3
-2
-1
Project Development
             
Royalty Payment and Fees
 
$176
$176
$176
$176
$176
$84
Environmental
 
$264
$341
$501
$330
$391
 
Exploration
 
$2,817
$1,000
$1,000
     
Metallurgical Test Work
 
$900
         
Prefeasibility Study
   
$1,495
       
Definition Drilling
     
$900
     
Metallurgical Test Work
     
$500
     
Full Feasibility
       
$2,019
   
Detail Design
         
$1,050
 
Purchase of Royalty
           
$1,250
Sub-total
 
$4,157
$3,012
$3,076
$2,525
$1,616
$1,334
Plant and Surface Facilities
             
Crusher and Screening Plant
           
$11,243
Stacker, Conveyors & Silo
           
$5,102
Leach Pad and Ponds
           
$11,058
ARD Plant
           
$3,881
Yard Facilities
           
$3,503
Heavy Mobile Equipment
           
$1,170
Buildings & Structures
           
$4,151
Fuel supply
           
$500
Explosive Magazine
           
$150
Sub-Total Direct
           
$40,758
Mining
             
Equipment
           
$415
Pre-production Development
           
$13,744
Sub-total
           
$14,159
Services
             
Power Line
           
$1,000
Power Sub Stations
           
$1,250
Diesel Generation
           
$250
Power Distribution
           
$1,195
Water Distribution
           
$250
Sewage
           
$100
Sub-total
           
$4,045
Total Direct Capital Costs
 
$4,157
$3,012
$3,076
$2,525
$1,616
$60,296
Indirect Costs
             
Engineering and Procurement
7.00%
         
$4,221
Construction Management
5.00%
         
$3,015
Construction Indirects
5.00%
         
$3,015
Freight
2.00%
         
$1,206
Start-up and Commisioning
1.00%
         
$603
First Fills and Capital spares
7.00%
         
$4,221
Sub-total
           
$17,486
Total without Contigency
 
$4,157
$3,012
$3,076
$2,525
$1,616
$77,782
Contingency
15.00%
$624
$452
$461
$379
$242
$11,667
Total Initial Capital
 
$4,780
$3,464
$3,538
$2,903
$1,859
$89,449

 
 
Coral Gold Resources Ltd. 21-3 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

21.1.4 Environmental
 
The environmental costs are estimated as $1.83 million and covers all the environmental and associated costs to a construction decision. The summary of these costs are shown in Section 26, Recommendations.
 
21.1.5 Exploration
 
Exploration and definition costs for the period to prefeasibility study is estimated at $2.817 million and the cost summary is shown in Section 26, Recommendations. In addition an allowance of $2.9 million has been included to cover additional drilling and associated activities to provide information for a full feasibility study.
 
21.1.6 Metallurgical Test Work
 
The estimated cost for the metallurgical test work is $900,000. A description of the work together with a cost summary is shown in Section 26, Recommendations. An allowance of $500,000 has been included to cover additional metallurgical test work for full feasibility.
 
21.1.7 Prefeasibility and Full Feasibility Studies
 
It is estimated that a prefeasibility study will cost an additional $1.5 million and a full feasibility some $2.019 million. The full feasibility costs will be further defined after completion of the prefeasibility study.
 
21.1.8 Detail Design
 
Detail design upon completion of full feasibility has been included at $1.05 million.
 
21.1.9 Purchase of Royalty
 
The only applicable Royalty has a buyout of $1.25 million. It is expected that this would occur upon a construction decision being made and is included in the year that this decision would be taken.
 
21.1.10 Crusher and Screening Facilities
 
The estimated cost for these facilities is $11.243 million. The summary of the cost are shown on Table 21.3. It is expected that 7500 tpd will be crushed.
 
 
 
Coral Gold Resources Ltd. 21-4 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
Table 21.3: Summary of Estimated Cost Crushing and Associated Facilities
 
Description
 
Estimated
Cost
 
Jaw Crusher
  $ 1,548,000  
Cone Crusher
  $ 1,816,000  
Double & Single Deck Screens
  $ 257,000  
Conveyors/Samplers/Scales
  $ 2,353,000  
Installation
  $ 2,413,000  
Piping
  $ 465,000  
Instrumentation
  $ 698,000  
Auxiliaries
  $ 931,000  
Outside Piping
  $ 762,000  
Total
  $ 11,243,000  

21.1.11 Stacker, Conveyors and Silo
 
This has been estimated at $5.102 million. This cost was based providing two systems one for the HG leach pad and for the LG.
 
21.1.12 Leach Facilities
 
Preliminary capital cost items and estimated quantities have been developed for the proposed leach pad, events pond and solution recovery components of the facility for pre-production infrastructure and the 78 Mt mine configuration. A detailed summary of cost items and associated quantities have been summarized in Table 21.4.
 
Initial capital costs include the foundation works, waste dump construction and ancillary works required for the leach pads, solution ponds and solution recovery systems.

 
 
Coral Gold Resources Ltd. 21-5 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Table 21.4: Preliminary Capital Cost Estimate Total Construction Costs
 
Area
 
Type
 
Units
 
Quantity
   
Quantity
(Rounded)
   
Unit Cost
(US$)
   
Total Cost (US$)
 
Low Grade HLF
                           
  101  
Topsoil stripping - to stockpile
 
cy
    302,407       302,400       4.50       1,361,000  
  102  
Grade preparation for pads
 
cy
    907,222       907,200       1.70       1,542,000  
  103  
Secondary GCL
 
yd2
    816,500       816,500       4.80       3,919,000  
  104  
Primary liner (80 mil textured HDPE)
 
yd2
    816,500       816,500       1.50       1,225,000  
  105  
Overliner
 
cy
    816,500       816,500       4.10       3,348,000  
  106  
Solution piping (4' perforated corrugated plastic tubing)
 
ft
    146,970       147,000       1.60       235,000  
  107  
Solution piping (12' HDPE)
 
ft
    14,697       14,700       11.20       165,000  
  108  
Solution piping (20' HDPE)
 
ft
    1,470       1,500       28.50       42,000  
High Grade HLF
                                   
  201  
Topsoil stripping - to stockpile
 
cy
    285,519       285,500       4.50       1,285,000  
  202  
Grade preparation for pads
 
cy
    856,556       856,600       1.70       1,456,000  
  203  
Secondary GCL
 
yd2
    770,900       770,900       4.80       3,700,000  
  204  
Primary liner (80 mil textured HDPE)
 
yd2
    770,900       770,900       1.50       1,156,000  
  205  
Overliner
 
cy
    770,900       770,900       4.10       3,161,000  
  206  
Solution piping (4' perforated corrugated plastic tubing)
 
ft
    138,762       138,800       1.60       222,000  
  207  
Solution piping (12' HDPE)
 
ft
    13,876       13,900       11.20       155,000  
  208  
Solution piping (20' HDPE)
 
ft
    1,388       1,400       28.50       40,000  
Waste Rock Dump - CAPEX
                                   
  301  
Topsoil stripping - to stockpile
 
cy
    149,704       149,700       4.50       674,000  
  302  
Foundation preparation
 
cy
    149,704       149,700       1.70       254,000  
  303  
Seepage and drainage collection
 
LS
    1       1       200,000       200,000  
Crusher Site
                                   
  401  
Topsoil stripping - to stockpile
 
cy
    1,667       1,667       4.50       8,000  
  402  
Cut
 
cy
    58,333       58,300       6.50       379,000  
  403  
Excess cut - load and haul
 
cy
    52,500       52,500       1.20       63,000  
  404  
Foundation preparation
 
ft2
    27,000       27,000       1.70       46,000  
ADR Plant
                                   
  501  
Topsoil stripping - to stockpile
 
cy
    27,000       27,000       4.50       122,000  
  502  
Cut
 
cy
    4,500       4,500       6.50       29,000  
  503  
Foundation preparation
 
cy
    750       800       1.70       1,000  
Pregant Solution Pond
                                   
  601  
Topsoil stripping - to stockpile
 
cy
    1,911       1,900       4.50       9,000  
  602  
Cut to fill volume
 
cy
    11,148       11,100       6.50       72,000  
  603  
Interliner gravel
 
ft2
    38,700       38,700       1.40       54,000  
  604  
Secondary liner (60 mil smooth HDPE)
 
ft2
    38,700       38,700       1.30       50,000  
  605  
Geonet
 
ft2
    38,700       38,700       1.20       46,000  
  606  
LRDS piping (2')
 
ft
    774       800       1.60       1,000  
  607  
Primary liner (60 mil textured HDPE)
 
ft2
    38,700       38,700       1.30       50,000  
Barren Solution Pond
                                   
  701  
Topsoil stripping - to stockpile
 
cy
    1,911       1,900       4.50       9,000  
  702  
Cut to fill volume
 
cy
    11,148       11,100       6.50       72,000  
  703  
Interliner gravel
 
ft2
    38,700       38,700       1.40       54,000  
  704  
Secondary liner (60 mil smooth HDPE)
 
ft2
    38,700       38,700       1.30       50,000  
  705  
Geonet
 
ft2
    38,700       38,700       1.20       46,000  
  706  
LRDS piping (2')
 
ft
    774       800       1.60       1,000  
  707  
Primary liner (60 mil textured HDPE)
 
ft2
    38,700       38,700       1.30       50,000  
Event Pond
                                   
  801  
Topsoil stripping - to stockpile
 
cy
    1,911       1,900       4.50       9,000  
  802  
Cut to fill volume
 
cy
    11,148       11,100       6.50       72,000  
  803  
Interliner gravel
 
ft2
    38,700       38,700       1.40       54,000  
  804  
Secondary liner (60 mil smooth HDPE)
 
ft2
    38,700       38,700       1.30       50,000  
  805  
Geonet
 
ft2
    38,700       38,700       1.20       46,000  
  806  
LRDS piping (2')
 
ft
    774       800       1.60       1,000  
  807  
Primary liner (60 mil textured HDPE)
 
ft2
    38,700       38,700       1.30       50,000  
Solution Transfer Ditches
                                   
  901  
Topsoil stripping - to stockpile
 
ft2
    16,600       16,600       4.50       75,000  
  902  
Cut to fill volume
 
cy
    15,370       15,400       6.50       100,000  
  903  
Channel lining (80 mil textured HDPE)
 
ft2
    70,428       70,400       1.50       106,000  
Haul Roads
                                   
  1001  
Construction (roads, ditches, etc)
 
mile
    2.3       2.3       805,000       1,868,000  
                                           
     
Total
                                27,783,000  

 
 
Coral Gold Resources Ltd. 21-6 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

21.1.13 ARD Plant and Associated Facilities
 
The summary of the estimated cost for ARD plant and associated facilities is shown on Table 21.5. These costs are based upon the Costmine data for this type of plant.
 
Table 21.5: Summary of Estimated Cost ARD Plant and Associated Facilities
 
Description
 
Estimated
Cost
 
Carbon Colums
  $ 407,000  
Stripping Circuit
  $ 87,000  
Electro-Winning Cell
  $ 47,000  
Furnace
  $ 73,000  
Acid Wash (stainless Steel)
  $ 139,000  
Carbon Conditioner
  $ 42,000  
Carbon Regeneration Kiln
  $ 308,000  
Installation
  $ 496,000  
Piping
  $ 399,000  
Instrumentation
  $ 240,000  
Building
  $ 420,000  
Auxilairies
  $ 240,000  
Outside Piping
  $ 319,000  
Laboratory
  $ 664,000  
Total
  $ 3,881,000  

21.1.14 Yard Facilities and Mobile Equipment
 
Yard facilities were estimated at $3,503 million with heavy mobile equipment of $1.17 million. These estimates were based upon the costs shown in the Infomine cost data.
 
21.1.15 Buildings and Structures, Fuel Supply and Explosives Magazine
 
The cost for the offices warehouse, maintenance facilities, dry, security and miscellaneous buildings has been estimated at $4.141 million based upon the estimated size of the facilities and unit cost per sq ft. An allowance of $500,000 has been made for the fuel supply facilities and $150,000 for the magazine based upon in house documentation.
 
21.1.16 Mining Equipment
 
Mining equipment costs is estimated at $23.5 million and is based upon the pieces of equipment required to mine the mineral and waste and budget costs from the suppliers. The equipment list and cost is shown below.

 
 
Coral Gold Resources Ltd. 21-7 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Table 21.6: Mine Equipment
 
Description
 
# Req'd
   
Cost/unit
   
Total cost
 
Atlas Copco Viper Drill
    2     $ 1,420,000     $ 2,840,000  
Komatsu PC1800 Shovel
    1     $ 2,453,706     $ 2,453,706  
Komatsu WA90
    1     $ 1,773,796     $ 1,773,796  
Komatsu HD785-7
    8     $ 1,269,147     $ 10,153,176  
Komatsu HD155AX-6
    2     $ 443,000     $ 886,000  
Komatsu GD655
    1     $ 253,908     $ 253,908  
Komatsu 600-6
    1     $ 635,841     $ 635,841  
Air trac/compressor
    1     $ 661,000     $ 661,000  
Komatsu HD325-7
    2     $ 583,197     $ 1,166,394  
Service truck
    2     $ 90,000     $ 180,000  
Crane truck
    1     $ 200,000     $ 200,000  
Blaster's truck
    2     $ 350,000     $ 700,000  
Light plant
    4     $ 20,000     $ 80,000  
Pick ups
    5     $ 35,000     $ 175,000  
Pump truck
    1     $ 30,000     $ 30,000  
Misc. Shop Equipt (lot)
    1     $ 200,000     $ 200,000  
Spares @ 5% (lot)
    1     $ 1,109,441     $ 1,109,441  
Total
                  $ 23,498,262  

21.1.17 Pre-production Development
 
The pre-production costs are based upon grubbing, overburden stripping and surface preparation for the Altenburg Hill and Porphyry and waste mining for the Porphyry. The Altenburg Hill deposit is a hill thus no waste mining is required prior to mining the mineral.
 
The estimated cost for this is $7.6 million.
 
21.1.18 Electrical Capital Cost
 
Table 21.7 is a summary of the electrical costs for NV Energy’s capital charges, Robertson’s site distribution and all site services.
 
Capital costs are listed below in Table 21.7.
 
 
 
Coral Gold Resources Ltd. 21-8 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

 
Table 21.7: Electrical Capital
 
Description
    $  
NV Energy Costs
       
120kV tap (allowance)
  $ 200,000  
New 3.0 MVA Substation 120-25kV (allowance)
  $ 500,000  
New 2 mile length 25kV powerline (allowance)
  $ 300,000  
 Subtotal     $ 1,000,000  
Coral Gold Resources Ltd. Costs
       
Main Site Substation 25-4.16kV
  $ 500,000  
Main switchgear line-up 4.16kV. 10 cells @ $50,000
  $ 500,000  
2.0 MW Diesel Emergency Generator
  $ 250,000  
4.16kV Distribution
       
Buried Cable 500ft @ $50/ft
  $ 25,000  
Overhead powerline 3 miles @ $50,000/mile
  $ 150,000  
Unit Substations (allowance)
       
Offices, warehouse, dry
  $ 50,000  
Fresh water pumping
  $ 50,000  
ADR Plant
  $ 50,000  
Pregnant Solution Pond
  $ 50,000  
Crushers
  $ 50,000  
Truck Shop
  $ 50,000  
Barren Solution Pond
  $ 50,000  
4.16kV Cable (allowance)
  $ 50,000  
4.16kV Motor Starters. 4 @ $10,000/each (allowance)
  $ 40,000  
480V Feeders (allowance)
  $ 75,000  
480V MCCs - 50 process, 20 bldg, and 20 feeders (allo
  $ 100,000  
480V Cable (allowance)
  $ 100,000  
Control cable (allowance)
  $ 50,000  
SCADA Cable (allowance)
  $ 50,000  
Building Services: lighting, heating, ventilation, small po
  $ 750,000  
Control Hardware (devices, PLC, computers)
  $ 100,000  
Control Software (devices, PLC, computers)
  $ 20,000  
Fire Protection (allowance)
  $ 50,000  
Communication (allowance)
  $ 50,000  
Security (allowance)
  $ 25,000  
Civil Works
  $ 100,000  
Installation Labour
  $ 100,000  
six men ‐ 1000 hr each @ $60/hr
  $ 360,000  
    Total Capital Cost   $ 3,295,000  
 
21.1.19 Water Distribution and Sewage
 
An allowance for these items up and above those costs included in other areas is $350,000.
 
 
 
Coral Gold Resources Ltd. 21-9 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

21.1.20 Additional Costs
 
The indirect costs have been estimated as a percentage of the capital cost and are shown on the Table 21.1. The percentages reflect industry standard.
 
21.1.21 Ongoing Costs
 
The ongoing costs for the two alternatives are shown below. The Owner operated approach requires replacement equipment throughout the life of the mine while these costs are included in the operating cost provided by the contactor. The leach pad and associated costs are the same for both cases and the sustaining capital items include the heap leach pads, the waste rock dump, solution transfer ditches and haul road construction.
 
Other costs associated with the heap leach facilities include operational costs and capital costs for leaching services. Table 21.10 shows these capital requirements by year throughout operations (11 years).
 
Table 21.8: Ongoing Capital Costs – Base Case (Owner Operator)
 
        Year          
Description
 
%
 
2018
 
2019
   
2020
   
2021
   
2022
   
2023
   
2024
   
2025
   
2026
   
2027
 
2028
 
2029
   
Total
 
Leach Pads
          $ 3,122     $ 3,122     $ 3,122     $ 2,943     $ 2,943     $ 1,472                               $ 16,724  
Replacement vehicles
    5.00       $ 1,175     $ 1,175     $ 1,175     $ 1,175     $ 16,175     $ 1,175     $ 1,175     $ 1,175     $ 1,175             $ 25,579  
Reclamation
                                                                                      $ 7,000     $ 7,000  
Contingency
    10.00       $ 430     $ 430     $ 430     $ 412     $ 1,912     $ 265     $ 117     $ 117     $ 117       $ 700     $ 4,930  
Total
            $ 4,727     $ 4,727     $ 4,727     $ 4,530     $ 21,030     $ 2,912     $ 1,292     $ 1,292     $ 1,292       $ 7,700     $ 54,233  

Table 21.9: Ongoing Capital Costs Alternate 1 (Contractor Operator)
 
        Year              
Description
 
%
 
2018
 
2019
   
2020
   
2021
   
2022
   
2023
   
2024
   
2025
   
2026
   
2027
   
2028
   
2029
   
Total
 
Reclamation
                                                                        -     $ 7,000     $ 7,000  
Contingency
    10.00       $ 312     $ 312     $ 312     $ 294     $ 294     $ 147                                     $ 700     $ 2,372  
Total
            $ 3,434     $ 3,434     $ 3,434     $ 3,237     $ 3,237     $ 1,619                                     $ 7,700     $ 26,096  

 
 
Coral Gold Resources Ltd. 21-10 January, 2012
 
 
Preliminary Economic Assessment   Robertson Property

Table 21.10: Preliminary Sustaining Capital Cost - Surface Facilities

   
Area
 
Year 2
   
Year 4
   
Year 6
   
Year 8
   
Year 10
   
Year 11
   
Total Cost (US$)
 
  100  
Low Grade HLF
    1,434,788       1,434,788       1,434,788       1,434,788       1,434,788       717,394       11,837,000  
  200  
High Grade HLF
    1,354,545       1,354,545       1,354,545       1,354,545       1,354,545       677,273       11,175,000  
  300  
Waste Rock Dump
    153,818       153,818       153,818       153,818       153,818       76,909       1,128,000  
  400  
Crusher Site
                                                    496,000  
  500  
ADR Plant
                                                    152,000  
  600  
Pregant Solution Pond
                                                    282,000  
  700  
Barren Solution Pond
                                                    282,000  
  800  
Event Pond
                                                    282,000  
  900  
Solution Transfer Ditches
    23,417       23,417       23,417                               281,000  
  1,000  
Haul Roads
    155,667       155,667       155,667                               1,868,000  
                                                               
     
SUBTOTAL
    3,122,000       3,122,000       3,122,000       2,943,000       2,943,000       1,472,000       16,724,000  
                                                               
     
TOTAL
                                                    16,724,000  
 
21.2 OPERATING COSTS
 
21.2.1 Basis of Estimate
 
21.2.1.1Mining Base Case
 
Project operating costs were estimated based on an overall average production rate of 20,000 tpd mineral and an average stripping ratio of 0.6:1 (i.e., a total average daily production of approximately 32,000 tons of material) which includes the low grade (0.005 to 0.0147 ozAu/t) leached on a separate pad. An operating schedule of 2 x 10 hr shifts per day for 350 days per year was incorporated into the mine plan based upon a seven-day week. Statutory holidays were not worked (52 weeks @ 7 days per week is 365 days, less 15 for allowance for all statutory holidays, 350 days).
 
The operating cost estimate is based on local labour rates and productivity factors, as well as local material and supply costs where applicable for Nevada. The labour rates obtained covered a broad range of job categories for both hourly rated and staff personnel and included all allowances for shift premiums, statutory social benefit premiums, vacations, medical benefits, etc. The costs for some bulk supply and consumable items, such as fuel and explosives, were obtained from local sources, but items such as drilling supplies, tires, and equipment maintenance costs were estimated from typical North American cost criteria.
 
21.2.1.2 Mining Alternative 1
 
· The open it operating cost are based on the following;
·  Production is based on 5 days/week, one and then 2 shifts per day and from 8 hours per shift up to 10 hrs per shift.
 
 
 
 
Coral Gold Resources Ltd. 21-11 January, 2012
 
Preliminary Economic Assessment   Robertson Property

·  
All labor for open pit drilling, blasting, loading, and hauling to the crusher/stockpile/waste dump is included.
·  
All equipment for open pit drilling, blasting, loading, and hauling to the crusher/stockpile/waste dump is included. An estimate for the initial construction of haul roads is included.
·  
An estimate for topsoil removal and stockpiling in the pit and waste dump areas is included.
·  
All bulk explosives, explosives accessories, drilling, and drill accessories are included.
·  
All management and supervisory costs are included.
·  
Transportation of hourly employees to and from the worksite is included.
·  
The capital costs for a maintenance facility, an equipment wash facility, and a fuel storage facility are not included in the estimate per your instructions, however; the cost to operate and maintain the maintenance facilities are included in the estimated unit costs.
·  
The estimated unit costs include diesel fuel at a rate of $3.80 per gallon. The total of road diesel fuel cost is estimated to be 14,270,900 gallons at a total cost of $54,494,742. The estimated fuel consumption report is attached.
·  
No blast hole or pit dewatering is included in the estimate.
·  
No crushing, stockpiling, or stockpile r e - handling costs are included.
 
The estimated cost summary by year is shown on Tables 21.11 and 21.12 below.
 
21.2.1.3 Cost Summaries
 
Table 21.11: Operating Cost Summary $(000)’s Base Case. (Owner Operator)
 
Description
Cost/t
1
2
3
4
5
6
7
8
9
10
11           
12
Total
Processed Ore (000)'s Ton
 
3,880
6,977
7,151
8,886
8,933
9,156
8,993
9,144
6,368
6,824
1,896
 
78,209
Mining Cost
$2.52
$13,988
$20,291
$20,223
$21,426
$21,688
$21,685
$20,335
$20,873
$16,786
$15,402
$4,264
 
$196,961
Plant HG
$2.93
$1,287
$4,207
$7,873
$6,442
$8,428
$8,507
$10,338
$13,465
$7,899
$7,314
$1,910
 
$77,671
Plant LG
$1.73
$5,953
$9,585
$7,723
$11,570
$10,477
$10,817
$9,454
$7,869
$6,354
$7,487
$2,152
 
$89,441
Power
$0.17
$1,210
$1,210
$1,210
$1,210
$1,210
$1,210
$1,210
$1,210
$1,210
$1,210
$1,210
 
$13,310
G/A
$0.38
$2,707
$2,707
$2,707
$2,707
$2,707
$2,707
$2,707
$2,707
$2,707
$2,707
$2,707
 
$29,777
Owners Cost
$0.07
$500
$500
$500
$500
$500
$500
$500
$500
$500
$500
$500
 
$5,500
Total
$5.28
$25,644
$38,500
$40,236
$43,854
$45,011
$45,426
$44,543
$46,625
$35,455
$34,621
$12,744
 
$412,660
Yearly Cost/ton
 
$6.61
$5.52
$5.63
$4.94
$5.04
$4.96
$4.95
$5.10
$5.57
$5.07
$6.72
 
$5.28

Table 21.12: Operating Cost Summary $(000)’s Alternative 1 (Contractor Operator)
 
Description
Cost/t
1
2
3
4
5
6
7
8
9
10
11          
12
Total
Processed Ore (000)'s Ton
 
3,880
6,977
7,151
8,886
8,933
9,156
8,993
9,144
6,368
6,824
1,896
 
78,209
Mining Cost
$3.70
$22,085
$27,061
$28,169
$28,961
$35,883
$35,724
$32,101
$30,039
$22,966
$21,065
$5,075
 
$289,127
Plant HG
$2.93
$1,287
$4,207
$7,873
$6,442
$8,428
$8,507
$10,338
$13,465
$7,899
$7,314
$1,910
 
$77,671
Plant LG
$1.73
$5,953
$9,585
$7,723
$11,570
$10,477
$10,817
$9,454
$7,869
$6,354
$7,487
$2,152
 
$89,441
Power
$0.17
$1,210
$1,210
$1,210
$1,210
$1,210
$1,210
$1,210
$1,210
$1,210
$1,210
$1,210
 
$13,310
G/A
$0.38
$2,707
$2,707
$2,707
$2,707
$2,707
$2,707
$2,707
$2,707
$2,707
$2,707
$2,707
 
$29,777
Owners Cost
$0.07
$500
$500
$500
$500
$500
$500
$500
$500
$500
$500
$500
 
$5,500
Total
$6.45
$33,741
$45,271
$48,182
$51,389
$59,206
$59,465
$56,309
$55,790
$41,635
$40,283
$13,554
 
$504,826
Yearly Cost/ton
 
$8.70
$6.49
$6.74
$5.78
$6.63
$6.49
$6.26
$6.10
$6.54
$5.90
$7.15
 
$6.45
 
 
 
Coral Gold Resources Ltd. 21-12 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
21.3 CRUSHING AND ARD PLANT
 
The process costs are based upon the crushing plant to crush at 7500tpd the HG ore and the ARD plant to process leachate for both the HG and LG leach pads.
 
The operating cost estimate for the crushing facilities and ARD plant have been based upon the costs established in Costmine documentation derived by Infomine.
 
These costs are indicative of the costs for projects similar to the conditions in northern Nevada, USA. The operating cost shown on Tables 21.13 reflects the cost to process 7500tpd which is the crushed HG mineralization and Table 21.14 the estimated cost to process 12500tpd of run-off-mine material.
 
Table 21.13: Summary Operating Cost 7500tpd
 
Description
Estimated Cost $/t Processed
Operating Labour
$1.00
Reagents
$1.01
Repair and Maintenance Supplies
$0.48
Wear Items
$0.09
Heavy Mobile Equipment Operation
$0.03
Staff / Supervision
$0.32
Total
$2.93

Table 21.14: Summary Operating Cost 12500tpd
 
Description
Estimated Cost $/t Processed
Operating Labour
$0.49
Reagents
$0.88
Repair and Maintenance Supplies
$0.15
Wear Items
$0.02
Heavy Mobile Equipment Operation
$0.03
Staff / Supervision
$0.16
Total
$1.73
 
21.3.1 Electrical
 
Project electrical operating costs are shown on Table 21.15 consist of the cost of power. Personnel, parts and consumables for ongoing repairs and maintenance to the electrical installation are included elsewhere. The estimated cost of power, based on NV Energy’s current tariff schedule and the unit cost is 8 US cents/kWh.
 
 
 
Coral Gold Resources Ltd. 21-13 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Table 21.15: Annual Electrical Power Costs
 
Description
  $  
Annual NV Energy Tariff Charges
       
14GWhr per year @ $0.08 per kWhr
  $ 1,120,000  
Total Annual Electrical Tariff Cost
  $ 1,120,000  

21.3.1.1Overheads (G&A) and Owner’s Costs
 
The overhead operations costs were estimated based on the administrative labour expected for this size of operation, miscellaneous surface operations personnel, and expenses such as communication, insurance, and supplies that are general and not included in the mine or process plant costs.
 
Owner’s costs were estimated to be at $500,000 per year for off-site costs.
 
21.3.1.2 Other Costs
 
Annual federal claim fees of US$84,140, payable to the BLM, and Notice of Intent to Hold Mining Claims of 6,310 have been filed for the 2011-2012 assessment year.
 
There were no other costs.
 
21.3.1.3 Royalties
 
Total annual payments for the various leases and minimum advance royalties or rental payments are US$91,700. A summary compilation of the terms of these agreements are presented in Table 4.1.
 
 
 
Coral Gold Resources Ltd. 21-14 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
SECTION 22.0 ECONOMIC ANALYSIS
 
22.1 FINANCIAL ANALYSIS
 
22.1.1 Financial Analysis Method
 
The financial analysis has been prepared using standard discounted cash flow methods to determine the NPV and IRR of the project based upon 100% equity financing and metal price of US$1350/oz Au. This gold price is some 8% greater than the trailing three year average and reflects most analysts opinion of higher gold prices Than the trailing price would suggest. The analysis was performed in constant 2011 US dollars, excluding inflation. Various sensitivities have been completed to determine the effect of metal prices, capital costs, operating costs and leach recovery.
 
22.1.2 Results Base Case
 
Case 1 (Base Case) economic evaluation is are based on an initial construction capital expenditure of US$122.1 million operating cost of $5.28/ton mined and metal prices of US$1350/oz6. The project will generate an after-tax IRR of 15.44% and an NPV of US$180.6 million undiscounted and US$97 million discounted at 5%. Payback of initial capital can be achieved in 5.91 years. The inferred resources established in this study are 78.2 million tons grading 0.0138 oz/t of gold.
 
Case 1 summary is shown on Table 22.1.
 
Case 5 reflects a gold price of US$1500/oz. Under this scenario the project will generate an after-tax IRR of 20.13% and a NPV of US$247.2 million undiscounted and US$147.1 million discounted at 5%. Payback of initial capital can be achieved in 4.72 years.
 
Case 7 reflects a gold price of US$1750/oz. Under this scenario the project will generate an after-tax IRR of 27.24% and a NPV of US$358.3 million undiscounted and US$230.7 million discounted at 5%. Payback of initial capital can be achieved in 3.91 years.
 
Sensitivity studies have been prepared varying the price of gold, the operating and capital cost, grade and leach recovery. The project most sensitive to gold price, sensitive to operating cost, grade and recovery and least sensitive to capital cost. The sensitivity results are shown on Table 22.2.
 
Graphs have been prepared showing the sensitivities and are included in this section.
 
It should be noted that the financial analysis has been evaluated on the basis of the construction activities being set against proceeds and those costs for the period to a construction decision have been included as sunk costs although these development costs have not been incurred at the time of writing this report. This is considered as an acceptable approach since any decision to construct will be based upon the financial analysis at the time following completion of the development activities. Thus the expenditures for construction only are set against the proceeds of the project and not the development costs. To include the development costs in the capital costs will not provide a basis for a fair evaluation of the project.
 
6 It should be noted that the authors of this report have not and do not forecast the future price of gold. The alternatives shown in this report are intended to indicate the variation of the project financials based upon sensitivity criteria shown.
 
 
 
Coral Gold Resources Ltd. 22-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
Table 22.1: Financial Analysis (Owner Operator)
 
ROBERTSON PROJECT
ALTENBURG, PORPHYRY AND GOLD PAN DEPOSITS
Financial Analysis Base Case
$(000)s
 
Resource Ton (000)'s              78,209                       YEAR
Description
-3 -2
-1
1
2
3
4
5
6
7
8
9
10
11
12
Total
Production Ton/year HG
     
439
1,436
2,687
2,198
2,877
2,903
3,528
4,596
2,696
2,496
652
 
26,509
Au Grade oz/t
     
0.017
0.019
0.021
0.019
0.019
0.019
0.020
0.023
0.022
0.024
0.021
 
0.021
Recovery Au %
     
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
 
67.00%
Production Ton/year LG
     
3441
5541
4464
6688
6056
6253
5465
4549
3673
4328
1244
 
51,700
Au Grade oz/t
     
0.010
0.010
0.010
0.010
0.011
0.010
0.011
0.010
0.010
0.010
0.010
 
0.010
Recovery Au %
     
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
 
45.00%
Au ounces payable
     
20,277
42,619
57,438
58,180
65,106
66,406
73,156
90,776
55,848
59,364
14,942
 
604,111
Gross Revenue
     
$ 27,350
$ 57,487
$ 77,476
$ 78,477
$ 87,819
$ 89,572
$ 98,678
$122,444
$ 75,332
$ 80,074
$ 20,155
 
342,699
Operating Costs
     
$ (25,644)
$ (38,500)
$ (40,236)
$ (43,854)
$ (45,011)
$ 45,426)
$ 44,543)
$(46,625)
$ (35,455)
$(34,621)
$ (12,744)
 
($412,660)
Income Tax
     
$ (29)
$  (315)
$ (1,115)
$ (1,822)
$ (3,409)
$ (4,622)
$ (5,857)
$(20,477)
$ (9,084)
$(11,167)
$ (1,608)
 
($59,506)
Revenue Before Capital Exp.
$1,677
$18,672
$36,125
$32,800
$39,399
$39,525
$48,278
$55,342
$30,793
$34,286
$5,803
 
$342,699
Capital Expenditures
                               
- Development/Construction
   
($114,583)
                       
($114,583)
- On-Going Capital
       
($4,727)
($4,727)
($4,727)
($4,530)
($21,030)
($2,912)
($1,292)
($1,292)
($1,292)
   
($46,528)
Working Capital Change
     
($3,039)
($1,697)
               
$4,735
   
Reclamation Bond
   
($7,500)
                     
$7,500
 
Reclamation
                           
($7,700)
($7,700)
Salvage
                           
$6,750
$6,750
Total Capital
   
($122,083)
($3,039)
($6,423)
($4,727)
($4,727)
($4,530)
($21,030)
($2,912)
($1,292)
($1,292)
($1,292)
$4,735
$6,550
($162,061)
Net Cashflow
   
($122,083)
($1,362)
$12,249
$31,399
$28,074
$34,869
$18,495
$45,366
$54,050
$29,500
$32,993
$10,538
$6,550
$180,638
Discounted NCF 5%
   
($122,083)
($1,297)
$11,110
$27,123
$23,096
$27,321
$13,801
$32,241
$36,583
$19,016
$20,255
$6,161
$3,647
$96,976
Discounted NCF 8%
   
($122,083)
($1,261)
$10,501
$24,925
$20,635
$23,732
$11,655
$26,471
$29,201
$14,758
$15,282
$4,520
$2,601
$60,937
Discounted NCF 10%
   
($122,083)
($1,238)
$10,123
$23,590
$19,175
$21,651
$10,440
$23,280
$25,215
$12,511
$12,720
$3,694
$2,087
$41,164

 
Rate of Return 15.44%      
Notes:     Payback  5.91 years
1. Metal Prices US $ Au 1350.00   Au first full production year 20,277 ozs
2. Capital requirements based on 100% equity.   4. Taxes are approximate. Average NSR/ton $10.42
3. All funds are in US$ except where noted.        
 
 
 
Coral Gold Resources Ltd. 22-2 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Table 22.2: Sensitivities (Owner Operator)
 
Case
Description of Sensitivity
NPV Dis.0%
NPV Dis.5%
NPV Dis.8%
IRR
   
US$(000)s
US$(000)s
US$(000)s
%
           
CASE 1 Base Case $180,638 $96,976 $60,937 15.44%
 
Case 2
Gold Price $850/oz
($57,729)
($84,166)
($94,825)
-6.12%
CASE3
Gold Price $1100/oz
$79,451
$19,046
($6,612)
7.15%
CASE 1
Base Case
$180,638
$96,976
$60,937
15.44%
CASE5
Gold Price $1500/oz
$247,156
$147,053
$103,770
20.13%
CASE6
Gold Price $1750/oz
$358,295
$230,661
$175,241
27.24%
CASE7
Gold Price $2000/oz
$464,197
$310,181
$243,159
33.41%
 
CASE8
Grade -10%
$124,051
$54,202
$24,232
11.07%
CASE9
Grade -5%
$151,823
$75,315
$42,414
13.29%
CASE 1
Base Case
$180,638
$96,976
$60,937
15.44%
CASE10
Grade +5%
$209,974
$119,021
$79,779
17.55%
CASE11
Grade +10%
$240,183
$141,688
$99,127
19.62%
 
CASE12
Capital Cost -20%
$188,904
$103,569
$66,733
16.13%
CASE13
Capital Cost -10%
$184,771
$100,272
$63,835
15.79%
CASE 1
Base Case
$180,638
$96,976
$60,937
15.44%
CASE14
Capital Cost +10%
$176,505
$93,679
$58,039
15.09%
CASE15
Capital Cost +20%
$172,372
$90,382
$55,141
14.75%
 
CASE16
Operating Cost -20%
$239,844
$142,662
$100,598
20.04%
CASE17
Operating Cost -10%
$209,805
$119,521
$80,533
17.74%
CASE 1
Base Case
$180,638
$96,976
$60,937
15.44%
CASE18
Operating Cost +10%
$152,031
$74,793
$41,610
13.12%
CASE19
Operating Cost +20%
$124,961
$53,382
$22,744
10.80%
 
CASE20
Leach Recovery +10%
$240,183
$141,688
$99,127
19.62%
CASE 21
Leach Recovery +5%
$209,974
$119,021
$79,779
17.55%
CASE 1
Base Case
$180,638
$96,976
$60,937
15.44%
CASE 22
Leach Recovery -5%
$151,823
$75,315
$42,414
13.29%
CASE23
Leach Recovery -10%
$124,051
$54,202
$24,232
11.07%
 
 
 
Coral Gold Resources Ltd. 22-3 January, 2012
 
Preliminary Economic Assessment   Robertson Property

 
 
 
Coral Gold Resources Ltd. 22-4 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
 
 
 
 
Coral Gold Resources Ltd. 22-5 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 

 
22.1.3 Results Alternative Case A1
 
Case A1 economic evaluation is are based on an initial construction capital expenditure of US$97 million operating cost of $6.45/ton mined and metal prices of US$1350/oz. The project will generate an after-tax IRR of 15.43% and an NPV of US$159.4 million undiscounted and US$85.2 million discounted at 5%. Payback of initial capital can be achieved in 5.94 years.
 
Case A1 summary is shown on Table 22.3.
 
Case A5 reflects a gold price of US$1500/oz. Under this scenario the project will generate an after-tax IRR of 20.96% and an NPV of US$226.4 million undiscounted and US$135.9 million discounted at 5%. Payback of initial capital can be achieved in 4.86 years.
 
Case A7 reflects a gold price of US$1750/oz. Under this scenario the project will generate an after-tax IRR of 29.18% and an NPV of US$337.8 million undiscounted and US$219.7 million discounted at 5%. Payback of initial capital can be achieved in 3.82 years.
 
Sensitivity studies have been prepared varying the price of gold, the operating and capital cost, grade and leach recovery. The project most sensitive to gold price, sensitive to operating cost, grade and recovery and least sensitive to capital cost. The sensitivity results are shown on Table 22.4.
 
 
 
Coral Gold Resources Ltd. 22-6 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Table 22.3: Financial Analysis Alternative 1 (Contractor Operator)
 
ROBERTSON PROJECT
ALTENBURG, PORPHYRY AND GOLD PAN DEPOSITS
Financial Analysis Base Case
$(000)s
 
Resource Ton (000)'s                                              78,209        YEAR
 
Description
-3 -2
-1
1
2
3
4
5
6
7
8
9
10
11
12
Total
Production Ton/year HG
     
439
1,436
2,687
2,198
2,877
2,903
3,528
4,596
2,696
2,496
652
 
26,509
Au Grade oz/t
     
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.02
 
0.02
Recovery Au %
     
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
67.00%
 
67.00%
Production Ton/year LG
     
3441
5541
4464
6688
6056
6253
5465
4549
3673
4328
1244
 
51,700
Au Grade oz/t
     
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
0.01
 
0.01
Recovery Au %
     
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
45.00%
 
45.00%
Au ounces payable
     
20,277
42,619
57,438
58,180
65,106
66,406
73,156
90,776
55,848
59,364
14,942
 
604,111
Gross Revenue
     
27,350
57,487
77,476
78,477
87,819
89,572
98,678
122,444
75,332
80,074
20,155
 
268,219
Operating Costs
     
(33,741)
(45,271)
(48,182)
(51,389)
(59,206)
(59,465)
(56,309)
(55,790)
(41,635)
(40,283)
(13,554)
 
($504,826)
Income Tax
     
($29)
($210)
($205)
($107)
($169)
($214)
($3,617)
($17,845)
($7,572)
($9,799)
($2,053)
 
($41,819)
Revenue Before Capital Exp.
($6,420)
$12,006
$29,090
$26,981
$28,445
$29,893
$38,752
$48,809
$26,125
$29,991
$4,548
 
$268,219
Capital Expenditures
                               
- Development/Construction
   
($89,449)
                       
($89,449)
- On-Going Capital
       
($3,434)
($3,434)
($3,434)
($3,237)
($3,237)
($1,619)
         
($18,396)
Working Capital Change
     
($3,039)
($1,697)
               
$4,735
   
Reclamation Bond
   
($7,500)
                     
$7,500
 
Reclamation
                           
($7,700)
($7,700)
Salvage
                           
$6,750
$6,750
Total Capital
   
($96,949)
($3,039)
($5,131)
($3,434)
($3,434)
($3,237)
($3,237)
($1,619)
     
$4,735
$6,550
($108,795)
Net Cashflow
   
($96,949)
($9,459)
$6,875
$25,656
$23,547
$25,207
$26,656
$37,132
$48,809
$26,125
$29,991
$9,283
$6,550
$159,424
Discounted NCF 5%
   
($96,949)
($9,008)
$6,236
$22,162
$19,372
$19,751
$19,891
$26,389
$33,036
$16,840
$18,412
$5,428
$3,647
$85,207
Discounted NCF 8%
   
($96,949)
($8,758)
$5,895
$20,366
$17,308
$17,156
$16,798
$21,666
$26,370
$13,069
$13,892
$3,981
$2,601
$53,394
Discounted NCF 10%
   
($96,949)
($8,599)
$5,682
$19,275
$16,083
$15,652
$15,047
$19,055
$22,770
$11,079
$11,563
$3,254
$2,087
$35,999

 
Rate of Return 15.43%      
Notes:      Payback 5.94 years
1. Metal Prices US $ Au 1350.00   Au first full production year 20,277 ozs
2. Capital requirements based on 100% equity.   4. Taxes are approximate. Average NSR/ton $10.42
3. All funds are in US$ except where noted.        
 
 
 
Coral Gold Resources Ltd. 22-7 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Table 22.4: Sensitivities – Alternative 1 (Contractor Operator)
 
Case
Description of Sensitivity
NPV Dis.0%
NPV Dis.5%
NPV Dis.8%
IRR
   
US$(000)s
US$(000)s
US$(000)s
%
           
CASE A1 Base Case $159,424 $85,207 $53,394 15.43%
 
Case A2
CASE A3
Gold Price $750
Gold Price $1000
($94,427)
$50,380
($107,304)
$624
($111,909)
($20,123)
-11.84%
5.08%
CASE A1
Base Case
$159,424
$85,207
$53,394
15.43%
CASE A5
CASE A6
CASE A7
Gold Price $1500
Gold Price $1750
Gold Price $2000
$226,426
$337,781
$445,057
$135,895
$219,732
$300,377
$96,886
$168,591
$237,512
20.96%
29.18%
36.41%
 
CASE A8
CASE A9
Grade -10%
Grade -5%
$106,068
$132,368
$43,645
$64,225
$17,154
$35,138
10.42%
12.94%
CASE A1
Base Case
$159,424
$85,207
$53,394
15.43%
CASE A10
CASE A11
Grade +5%
Grade +10%
$189,244
$219,453
$107,787
$130,521
$72,784
$92,229
17.95%
20.37%
 
CASE A12
CASE A13
Capital Cost -20%
Capital Cost -10%
$162,796
$161,071
$88,022
$86,587
$55,930
$54,640
15.80%
15.62%
CASE A1
Base Case
$159,424
$85,207
$53,394
15.43%
CASE A14
CASE A15
Capital Cost +10%
Capital Cost +20%
$157,789
$156,204
$83,836
$82,502
$52,156
$50,949
15.25%
15.08%
 
CASE A16
CASE A17
Operating Cost -20%
Operating Cost -10%
$232,745
$195,890
$142,161
$113,650
$103,028
$78,244
22.14%
18.84%
CASE A1
Base Case
$159,424
$85,207
$53,394
15.43%
CASE A18
CASE A19
Operating Cost +10%
Operating Cost +20%
$127,084
$95,153
$59,049
$32,755
$30,099
$6,515
12.14%
8.88%
 
CASE A20
CASE A21
Leach Recovery +10%
Leach Recovery +5%
$219,453
$189,244
$130,521
$107,787
$92,229
$72,784
20.37%
17.95%
CASE A1
Base Case
$159,424
$85,207
$53,394
15.43%
CASE A22
CASE A23
Leach Recovery -5%
Leach Recovery -10%
$132,368
$106,068
$64,225
$43,645
$35,138
$17,154
12.94%
10.42%
 
 
 
Coral Gold Resources Ltd. 22-8 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
SECTION 23.0ADJACENT PROPERTIES
 
The Robertson Property is completely surrounded by unpatented mining claims owned mostly by the Cortez JV and a few junior companies. Immediately west of the core Robertson claim block are the “Excluded” claims which are subject to a joint venture between Coral and Cortez Gold Mines in which Coral has a 39 percent carried interest. There are no known mineral resources located on the “Excluded” claims. North of the Robertson core claims are a series of scattered and mostly small groups of unpatented claims and private property (part of the Newmont “checkerboard”). Most of these properties are in the early stages of exploration and none have reported mineral resources.
 
Approximately 4 miles south of the center of the Robertson core claims is the Pipeline/South Pipeline mine complex owned and operated by Barrick Gold Corporation. As reported in Barrick’s 2010 annual report, proven and probable reserves are estimated to be 317 million tons having an average grade of 0.046 ozAu/t. However, this estimate includes proven and probable reserves from Cortez Hills and the Pediment deposits. For the 9 months ending September 30, 2007, the last year it was reported separately, Pipeline/South Pipeline mine produced 240,000 ounces of gold from 15,948,000 tons of ore (Barrick, 2007 third quarter mine statistics). Mining is by open pit, while processing is by conventional milling using cyanide and CIL and standard heap leach technology.
 
The Pipeline/South Pipeline are Carlin-type, sediment hosted gold deposits within the Gold Acres structural window. The gold deposits are hosted by favorable carbonate rocks in the lower plate of the RMT. Besides favorable lithology, major ore controls include a series of northeast striking fault/fracture zones and a set of stacked, flat-lying shear zones. These deposits are in sharp contrast to the smaller and lower grade hornfels-hosted deposits that are developed at Robertson in the upper plate of the RMT.
 
 
 
Coral Gold Resources Ltd. 23-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
SECTION 24.0 OTHER RELEVANT DATA AND INFORMATION
 
There is no other relevant data or information.
 
 
 
Coral Gold Resources Ltd. 24-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
SECTION 25.0 INTERPRETATION AND CONCLUSIONS 25.1 INTRODUCTION
 
Based on drilling results through 2008 the Robertson Property has an inferred mineral resource estimated to contain 178.9 million tons of mineralized material having an average grade of about 0.0189 ozAu/t at a 0.0106 ozAu/t cutoff grade (Beacon Hill, 2009). Of this total resource, about 64.5 million tons having an average grade of 0.017 ozAu/t and containing about 1.1 million ounces of gold are considered shallow oxide mineralization potentially amenable to open pit mining and possible heap leaching. In addition, approximately 85.7 million tons of the total resource, having an average grade of 0.0188 ozAu/t, are classified as sulfide and could potentially be mined by open pit. The amenability of the sulfide resource to heap leaching is unknown at this time and must be determined before the sulfide resources can be considered. It is anticipated, but not certain, that a large portion of the 178.9 million tons of inferred resources will be upgraded to a measured and indicated mineral resource as a result of the proposed 2012-13 drilling program. This will be accomplished by offset and in-fill drilling by diamond core drilling where needed and by conducting appropriate metallurgical and geotechnical studies.
 
With the exception of the Gold Pan Zone, the remaining resources were drilled out by either Amax Gold (1990-1996) or Coral Gold Resources (2004-2010). It is the opinion of the author that the quality of work by these companies justifies a high degree of confidence in the data that was generated. The use by these companies of highly skilled drilling companies, high quality assay labs and the routine employment of QA/QC programs provides additional confidence in the data generated during their exploration programs. One concern is the general lack of diamond drilling in most of the resources, except for the Porphyry Zone. It is strongly recommended that future resource definition drilling be conducted using mainly diamond drilling.
 
About one-half of the Gold Pan inferred resource was originally drilled out by E & B Exploration (1980-1981). While only a limited record of their work is available, it appears that the drilling and assaying met or exceeded industry standards of that time. During 1990-1996, Amax drilled approximately 25 RC holes in the Gold Pan Zone within the area initially drilled by E & B, as well as to the west where the zone overlies the 39A mineralization. In addition, Coral Gold also drilled the same areas during the period 2004-2010. The drilling by both Amax and Coral appear to confirm the results of the E & B drilling. However, one area where follow up drilling was unable to confirm the earlier drilling is the area now covered by an existing heap leach pad. The leach pad was constructed in 1989, well after the E & B drilling, but prior to the Amax and Coral drilling. Drilling on or in close proximity to the leach pad has been and continues to be prohibited by the BLM. The leach pad is approximately 850 ft by 800 ft and may cover as much as one-third of the resource. As a result, the portion of the resource that underlies the leach pad was estimated using only historic drilling (E & B and early Coral 1986-1988), some of which is considered of marginal quality.
 
 
 
Coral Gold Resources Ltd. 25-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 

 
 
 
Coral Gold Resources Ltd. 25-2 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
25.2 CONCLUSIONS
 
The following is a list of the conclusions;
 
·  
The Robertson property is one of merit upon which further work is warranted consisting of exploration and definition drilling, metallurgical test work, geotechnical test work and associated work that will allow the preparation of a project evaluation to a prefeasibility level.
·  
The relative low capital cost provides an opportunity for a junior company such as Coral to raise those funds and operate the project.
·  
The project is seen as one where a contractor operation would be beneficial due to the since the increased operating cost of some 49% above that estimated as an owner operation is off set by the decrease in capital cost, thus providing a lower capital cost6 for the Owner while maintaining similar economic benefits.
·  
The Nevada project approval system has elongated the development period for the project. Every effort should be made to attempt to reduce the time to achieve regulatory approval of the project and allow the project to be developed as quickly as is feasible.
·  
The financial analysis results indicate that the project breaks even at US$950/oz gold for the Owner operation and US$1010/oz for the Contractor.
 
 
 
Coral Gold Resources Ltd. 25-3 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
SECTION 26.0 RECOMMENDATIONS
 
It is recommended that the project be developed in two stages. The first is that work required to take the project to complete a prefeasibility report and then that work required to complete a full “bankable” feasibility, i.e., one on which a construction decision could be made. Costs have been included for stage 2 in the capital cost section for guidance only and will be defined in the prefeasibility report.
 
The work in stage 1 consists of;
 
1. Exploratory and definition drilling.
2. Metallurgical test work program.
3. Environmental program.
4. Geotechnical and associated work.
5. Preliminary Feasibility Study.
 
A summary of stage 1, estimated to cost $7.9 million, is shown on Table 26.1. Cost breakdowns are shown on Tables 26.2 and 26.3.
 
Table 26.1: Summary of Expenditures for Stage 1
 
Description
Estimated Cost $
Royalty and Regulatory Fees
$351,680
Exploratory and definition drilling
$2,817,000
Metallurgical test work program
$900,000
Environmental program
$1,826,138
Preliminary Feasibility Study
$1,495,000
Contingency
$510,182
Total
$7,900,000
 
26.1 EXPLORATION AND DEFINITION DRILLING
 
It is recommended that Coral conduct a two phase exploration program focused on expanding and up-grading the near-surface oxide and sulfide inferred mineral resources to measured and indicated. The details of the proposed work program and budget are presented in Table 26.2. The size of Phase II is contingent upon favorable results of Phase I.
 
The Phase I should consist of drilling 40 HQ diameter diamond core holes and 42 RC holes having an average depth of 400-500 ft and totaling about 40,000 ft.
 
●  
Porphyry Zone: Is currently defined by approximately 200 drill holes (150 RC holes and 50 core holes) totaling 80,000 ft drilled by Amax in 1992-94. Because these holes were completed prior to implementation of NI43-101 Standards of Disclosures for Mineral Projects, these drill holes are considered to be “historic” and, therefore, the Amax data must be verified before the Porphyry resource can be ungraded to measured and indicated. To comply with the NI43-101 rules, it is recommended that 10 percent (20 holes) of the historic drill holes be “twinned” by diamond core drilling. If the twin core holes compare favorably with the historic drilling, it can be assumed that the “historic” Amax drilling data can be used with confidence.
 
 
 
Coral Gold Resources Ltd. 26-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
●  
It is also recommended that an additional 17 RC holes, totaling about 7,600 ft, be drilled along the west and south boundaries of the Porphyry Zones to test for possible extensions to mineralization.
 
●  
Altenburg Hill/South Porphyry Area: Twenty-five RC holes totaling 12,400 ft as offset drilling on the north flank of Altenburg Hill and in the gravel-covered area south of the Porphyry Zone. Of particular importance is testing the undrilled granodiorite-hornfels contact area extending at least 1,500 ft north of holes CR08-31/CC10-3.The
 
●  
intrusive/hornfels contact is the principal control of mineralization in the Porphyry and Altenburg Hill Zones.
 
●  
Gold Pan Zone: Twenty wide-spaced diamond core holes totaling 10,000 ft to verify continuity and grade retuned in historic drilling. These holes will also provide material for additional metallurgical test work.
 
●  
Phase II should consist of 20 HQ diameter diamond core holes totaling about 10,000 ft. The purpose of core drilling is to provide geological data on the controls of mineralization, acquire geotechnical data (RQD and specific gravity), confirm grade and continuity and provide material for metallurgical testing.
 
●  
Altenburg Hill/South Porphyry: Assuming the Phase I RC drilling identifies a substantial increase to the Altenburg Hill/South Porphyry it is recommended that follow up diamond core drilling (20 holes) be conducted in these areas to provide ore-grade oxide and sulfide mineralization for metallurgical studies and confirm the grade and continuity of mineralization.
 
Total cost of both phases of the proposed 2012-13 drilling program is expected to be about US$3.1 million. Phase I will begin as soon approval of the 2010 APO is granted by the BLM and NDEP, pending drill rig availability and weather conditions. As proposed and assuming two RC rigs and two core rigs are employed, it is estimated that Phase I RC drilling will take about 50 days to complete and core drilling will take 120 days to complete, including days off. The timely completion of Phase I will depend on the availability of diamond core drills which have been difficult to secure in Nevada during the last few years. Assuming that two core rigs are employed, the Phase II program should take about 60 days to complete, including days off.
 
 
 
Coral Gold Resources Ltd. 26-2 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Table 26.2: Recommended 2012-13 Drilling Program and Budget.
 
Target/Activity
Work Program
Total Footage
(ft)
Cost in US$
       
PHASE I
     
       
Porphyry Zone
20 vertical diamond core holes 500-ft-deep
10,000
650,000
Alt Hill/Porphyry Zones
42 vertical RC holes 400-500-ft-deep
20,000
250,000
Gold Pan Zone
20 vertical diamond core holes 500-ft-deep
10,000
650,000
Assaying/QA-QC
Sample prep + assays: 8,800 assays x $25/sample
 
220,000
Drill site construction
82 drill sites + sumps: 80 hrs x $140/hr
 
11,200
Access road constr.
4,800 ft + mob/demob
 
5,200
Reclamation
82 sites + 4,800 ft of road + mob/demob
 
12,600
Drilling supplies
Sample bags + chip trays: 8,200 bags + 200 chip trays
 
20,000
Surveying
Collar surveys
 
7,000
Database management
Consulting services
 
10,000
Geological Services
Consulting services: 8.7 man months
 
130,000
Expenses
Food,gas, vehicles
 
24,000
Hourly labor
Core prep, core sawing, etc.
 
20,000
Phase I Total
 
40,000
2,010,000
 
Target/Activity
Work Program
Total Footage
(ft)
Cost in US$
       
PHASE II
     
       
Alt Hill/Porphyry Zones
20 vertical diamond core holes 500-ft-deep
10,000
650,000
Assaying/QA-QC
Sample prep + assays: 2,200 assays x $25/sample
 
55,00
Drilling supplies
Sample bags: 2,100 bags
 
5,000
Surveying
collar surveys
 
4,000
Database management
Consulting services
 
5,000
Geological Services
Consulting services: 4.0 man months
 
60,000
Expenses
Food, gas, vehicles
 
18,000
Hourly labor
Core prep, core sawing, etc.
 
10,000
Phase II Total
 
10,000
807,000
       
Total Estimated Cost of Phase I + Phase II
 
2,817,000
 
 
 
Coral Gold Resources Ltd. 26-3 January, 2012
 
Preliminary Economic Assessment   Robertson Property

 
26.2 METALLURGICAL TEST WORK PROGRAM
 
Testing of oxidized ore zones from Altenburg Hill, and Gold Pan deposits have been shown to respond to heap leach processing. Further evaluation of these two deposits and any other additional ore zones being considered for development are needed as the project proceeds into prefeasibility. Further testing will be required on the Porphyry deposit which has had prior studies performed by AMAX and others, but additional confirmation laboratory work will be needed.
 
Variability testing would be performed on samples obtained both spatially and at depth for the oxide and transition to sulfide ore zones. Prior to variability testing composited material representing larger zones of each deposit require more detailed work to better define the crush size and other process conditions. These master composites should be based on similar physical characteristics of the rock including SG, mineralogy, lithology, as well as chemical similarities based on the analyses. Once characterized, then representative samples need to be submitted for crushing work index and abrasion testing, as well as mineralogical evaluation of column feed and products. Some of this work requires receiving whole drill core. Extensive column work would be undertaken to determine optimum crush size and other process conditions. The recent 2011 laboratory program focused on 19 mm (3/4”) product crush size. However, when comparing to some historical work a 12.5 mm (1/2”) crush size and work will include this size as well as other sizes. Optimization and variability testing for oxide and partially oxidized material is expected to approach $350,000, not including the cost of generating the sample from drilling programs.
 
Similar testing as was performed on oxide materials would be required for sulfide and transition zone materials. The amount of column studies would be rationed depending on the resource tonnage identified in these deposits. In addition to gold grade it will be important that resource development and mine scheduling include classification of ore as oxide, partial oxide (transition) and sulphide material. Sulfide materials have shown a decreased leach response and additional processing parameters might be investigated including reagent use and concentrations. Dependent on grade shell characteristics the evaluation of alternate processing procedures can be investigated for higher grade sulfide feeds. This could include tank leaching and flotation studies. The estimated budget for this portion of a test program performed on sulfide material is $200,000.
 
A lower gold cut-off grade of 0.005 oz/ton (0.17 g/tonne) was included in this study. For the 2011 test program samples of this material were labeled as overburden (OB) and evaluated for cyanide amenability. The results show an encouraging response and the possibility of dump leaching of run of mine low grade materials. The next step of evaluation for these materials should involve large particle size rock. North American laboratories are capable of handling up to 10 tons of 100% minus 300 mm (~12”) feed. Several such samples would need to be mined, transported, studied and disposed. The work should also include some conventional columns using coarse crush material. Estimated budget for such a program is $350,000.
 
Depending on the schedule of project advancement, on-site testing can be considered for both heap and dump leaching evaluation to supplement and /or replace portions of a laboratory program. This would involve bulk mining and building of cribs and/or test heaps (with pads and ponds) in order to better evaluate leaching of low grade run of mine rock as well as higher grade crushed material. Such a program would be costly as it involves contract bulk mining of several thousand tons of rock, mobile crushing and stacking, and long term monitoring. Costs would need to be developed with local contractors and suppliers.
 
The overall cost is estimated to be $900,000 as shown on Table 26.3.
 
 
 
Coral Gold Resources Ltd. 26-4 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Table 26.3: Estimated Cost - Metallurgical Test Work Program
 
Description
Est. Cost $
Oxide / Partially Oxidized High Grade Drill Core
 
Sample Delivery / Preparation
$20,000
Ore Characterization / Geotechnical
$12,000
Crushing WI / Abrasion Testing
$25,000
Bottle Roll Testing
$18,000
Column Optimization Testing
$50,000
Column Variability Testing
$210,000
Solution Chemistry / Detox
$15,000
Sub-Total
$350,000
Sulfide and Transition High Grade Drill Core
 
Sample Delivery / Preparation
$8,000
Ore Characterization / Geotechnical
$7,000
Crushing WI / Abrasion Testing
$12,000
Whole Ore Bottle Roll Testing
$10,000
Column Optimization Testing
$30,000
Column Variability Testing
$90,000
Flotation Studies
$25,000
Concentrate Cyanide Studies
$14,000
Solution Chemistry
$4,000
Sub-Total
$200,000
Low Grade Bulk Tonnage Samples
 
Bulk Mine and Delivery
$200,000
Large ROM Column Studies
$125,000
Associated testing for characterization
$25,000
Sub-Total
$350,000
Total
$900,000

26.3 GEOTECHNICAL AND ASSOCIATED INVESTIGATIONS
 
The proposed geotechnical and associated investigation costs are included in the feasibility costs estimates. It is planned to geotechnically log the core holes drilled as part of the exploration program. This information together with the list below will form the basis for this work.
 
26.3.1 Heap Leach Pad Stability Assessment
 
The geotechnical stability of the heap leach pads has not been assessed. It is recommended that embankment stability analyses be carried out using a limit equilibrium model such as SLOPE/W. Such models utilize systematic algorithms to obtain the minimum factor of safety from a series of potential slip surfaces. The models assess the susceptibility of a given embankment to fail in circular, translational or composite slip modes.
 
The embankments should be analysed under both static and pseudo-static (seismic conditions) to ensure that appropriate design factors of safety are achieved by the design.
 
A minimum factor of safety of 1.3 is recommended for the static case. The consequences of failure of the heap leach pad during an earthquake event are likely to be minimal and restricted to some displacement of the heap leach pad slopes. There should be negligible impact on the integrity of the heap leach pad and little, if any, impact on other mine site facilities; however, for the design of the heap leach pads a conservative design earthquake such as the 1 in 475 year earthquake event is recommended.
 
 
 
Coral Gold Resources Ltd. 26-5 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
The stability of the heap leach pads is likely to be controlled by the interface friction angles between the overliner, geomembrane liners and the GCL. Potential slip surfaces should be assessed and the design should have an appropriate factor of safety against this failure mode.
 
Pad stability during earthquake loading should be assessed by performing a pseudo-static analysis, whereby a horizontal force (seismic coefficient) is applied to the embankment to simulate earthquake loading to determine the critical acceleration required to reduce the factor of safety to 1.0. Deformation of the leach pad may occur if the critical acceleration is lower than the predicted average maximum ground acceleration along the potential slope surface from the design earthquake.
 
Potential deformations under earthquake loading should be estimated using the simplified methods of Newmark (1965) and Makdisi-Seed (1977). These two methods estimate displacement of the potential sliding mass based on the average maximum ground acceleration and the yield acceleration. The yield acceleration corresponds to the seismic coefficient required to initiate movement of the sliding mass. The yield acceleration may be determined by iterative stability analyses.
 
The stability of the heap leach facility is very sensitive to the interface shear strengths associated with the liner system. Direct shear testing will be required for future design studies to provide more definitive interface friction angles between the various proposed liner surfaces.
 
26.3.2 Open Pit and Plant Site
 
Detailed foundation assessments have not been carried out for the pit and plant site areas; however, based upon a review of the site, it is unlikely that geotechnical conditions will preclude the development of mine site infrastructure.
 
It is recommended that the following points be assessed;
 
·  
Evaluation of the allowable soil bearing pressures induced by plant site facilities for a range of different footing shapes and sizes, and consideration of potential settlements
·  
Estimation of the allowable bearing pressures of the bedrock
·  
Seismic design parameters for the plant site, and
·  
Recommendations for the plant site foundation design.
 
26.3.2.1 Other Studies
 
The following is a list of recommendations for additional site investigations, test work and design studies required to carry the project through to final design and construction:
 
·  
Geotechnical Investigations and Test work:
·  
Test pits in the leach pad area to investigate foundation conditions, overburden materials, and depth to bedrock.
·  
Drill holes to investigate depth and quality of bedrock, for permeability testing, and for the installation of groundwater monitoring wells.
 
 
 
Coral Gold Resources Ltd. 26-6 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
·  
Additional test pits to prove suitability, availability and quantity of borrow materials for earthworks construction.
·  
Additional laboratory index test works (including compaction tests) on potential borrow materials.
·  
Strength and permeability test work on potential borrow materials for pad foundation and embankment construction.
·  
Direct shear testing of the geosynthetic liner interfaces, to determine interface friction angles for stability assessment.
·  
Ore testing (including gradation, leaching moisture content, residual moisture content, Altenburg Hill limits, load-permeability, and load-density).
 
26.3.2.2 Design Studies and Analyses:
 
·  
Detailed hydrology studies to predict surface runoff and storm flows.
·  
Leach testing to determine optimal ore densities, leaching rates and resulting in-heap moisture contents.
·  
Detailed water balance analyses, based on results of hydrology and leach testing, to estimate solution storage area water volumes, peak storm flows for ditch design, and for the sizing of pump and pipework systems.
·  
Stability analyses based on results of laboratory strength test work.
·  
Seepage analyses to predict seepage flow patterns and solution losses for the design of the LDRS.
 
Detailed design of all civil and mechanical works, including sumps, intakes, outlets, pumps, pipe systems etc.
 
26.3.3 Foundation Design
 
The foundation recommendations provided are preliminary based on limited and preliminary information on site layout and design loads.
 
It is recommended that footings for critical plant site structures are constructed directly on bedrock or otherwise suitable foundation materials. Bedrock is anticipated at shallow depths of from 5 to 15 feet and should provide a solid foundation. Strip footings at least 3 feet in width are recommended for the plant site structures. They may be designed to impose a maximum pressure of 75 psi on the weathered bedrock, with negligible settlements.
 
Overburden materials should be removed at a 2H:1V slope. The site should be maintained dry and well drained during and after construction activities. Surface runoff from building roofs and access roads, etc., shall be directed away from foundations, and perimeter drains of coarse grained materials shall be installed to effectively carry water around the perimeter of the structures to a low sump.
 
26.4 ENVIRONMENTAL WORK
 
The proposed environmental work consists the following as shown in Table 26.4. It is expected based upon present legislation to be complete and the project approved in 2017. It may be possible to reduce this period and it is recommended that this be reviewed to see if a reduction in the 6 years can be reduced.
 
 
 
Coral Gold Resources Ltd. 26-7 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Table 26.4: Summary of Proposed Environmental work
 

26.5 PREFEASIBILITY STUDY
 
The expected cost to complete a Preliminary Feasibility study, based upon the results of the PEA as described in this report, is $1.5 million. Table 26.5 shows the cost estimate breakdown for the Prefeasibility Study.
 
Table 26.5: Prefeasibility Cost Estimate
 
 
 
 
Coral Gold Resources Ltd. 26-8 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
SECTION 27.0 REFERENCES
 
Barnes, T., 2006 Preliminary Resource Evaluation for the Robertson Property, Lander County, Nevada, Barnes Engineering Services, Inc. on behalf of Coral Gold Resources Ltd.
 
Deutsch, C.V., Journel, A.G. 1998 GSLIB: Geostatistical Software Library and User’s Guide. Oxford University Press, Oxford, New York.
 
Houlding, S.W. 1999 Practical Geostatistics, Modeling and Spatial Analysis. Springer-Verlag, Berlin Heidelberg.
 
Isaaks, E.H. 2001 SAGE: Geostatistical A Spatial and Geostatistical Environment for Variography, Isaaks&Co., San Mateo, California.
 
Isaaks, E.H., Srivistava, R.M. 1989 An Introduction to Applied Geostatistics, Oxford University Press, Oxford, New York.
 
Mintec, inc. 2003 MineSight 3D System Software and Documentation. Mintec, inc., Tucson, Arizona.
 
Sinclair, A.J, Blackwell, G.H. 2002 Applied Mineral Inventory Estimation. Cambridge University Press.
 
Wellmer, F.-W. 1998 Statistical Evaluations in Exploration for Mineral Deposits. Springer-Verlag, Berlin Heidelberg.
 
Amax Gold Incorporated, 1994, Feasibility Study, unpublished report.
 
Barnes Engineering Services, Inc., 2006, Preliminary resource evaluation for the Robertson Property, Lander County, Nevada USA, unpublished report 12 p.
 
Candee, C. R., 1996, Robertson Project, Lander County, Nevada: Summary of results,conclusions, and exploration potential derived from the 1995 drilling campaign: unpublished memo, 9 p.
 
Cox, D. P., 1992, Descriptive model for distal disseminatedAg-Au, in Bliss, J. D. ed.,
Developments in Mineral Deposit Modeling: U.S. Geological Survey Bull. 2004, p. 20-22.
 
Deleen, J., 1980, Evaluation of the Aaron Mining Ltd. Claims in the Bullion mining district, Nevada USA: unpublished report, 17 p.
 
1981, Summary of the exploration program completed on the claims of Aaron Mining Ltd. located at Tenabo, Bullion mining district, Lander County, Nevada, during the period 6/26/79 to 11/15/80: unpublished report, 24 p.
 
Gilluly, James and Gates, Olcott, 1965, Tectonic and igneous geology of the northern Shoshone Range, Nevada: U.S. Geol. Survey Prof. Paper 465, 153 p.
 
Hebert, J. P., 1999, Report on exploration of the Robertson Property, Lander County, Nevada: unpublished report, 8 p.
 
 
 
Coral Gold Resources Ltd. 27-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Humphrey, F. L., 1945, Report on Gold Quartz and Phoenix mines, Lander County, Nevada: Nevada Bureau of Mines Report (unpublished), 11 p.
 
Johnson, M. G.,1973, Placer gold deposits of Nevada: U.S. Geol. Survey Bull. 1356, pp. 39-41.
 
Kilborn Engineering (B.C.) Ltd., 1989, Report on reserve estimates for Coral Gold Corporation: unpublished report, 19 p.
 
Leonardson, R. W. and Rahn, J. E., 1996, Geology of the Betze-Post gold deposit, Eureka, Nevada, in Coyner, A. R. and Fahey, P. L., Geology and Ore Deposits of the American Cordillera, Symposium Proceeding: Geol. Soc. of Nevada, pp. 61-93.
 
McCusker, R. T., 2001, Robertson Property summary report, 2001, Lander County, Nevada: unpublished report, 18 p.
 
2004, Geological Report on the Robertson Property, Lander County, Nevada U.S.A.: unpublished report, 74 p.
 
2004, Robertson Property drilling results, Lander County, Nevada, U.S.A.: unpublished report, 21 p.
 
2005, Summary of December 2004 drilling program at the Robertson Property, Lander County, Nevada U.S.A.: unpublished report, 34 p.
 
McKee, E. H. and Silberman, M. L., 1970, Geochronology of the Tertiary igneous rocks in central Nevada: Geol. Soc. American Bull., v 81, no. 8, p. 2317-2328.
 
Mintec, Inc., 1988, Report on the Gold Pan Zone modeling and reserve estimate: unpublished report, 14 p.
 
Noland, P. D., 1989, Robertson Project-Triplet Gulch 1988 drilling summary: unpublished report, 6 p.
 
Orris, G. J., Bliss, J. D., Hammarstrom, J. M., and Theodore, T. G., 1987, Description and tonnage of gold-bearing skarn: U.S. Geological Survey Open File Report 87-273, 50 p.
 
Ray, G. E., Ettlinger, A. D., and Meinert, L. D., 1990, Gold skarns: their distribution, characteristics and problems in classification: B. C. Ministry of Energy, Mines and Petroleum Resources, Geological Fieldwork 1989, Paper 199-1, p. 237-246.
 
Sampson, C. J., 1988, Report on the Robertson Project near Crescent Valley, Bullion mining district, Lander County, Nevada: unpublished report, 24 p.
 
Sampson, C. J., 1995, Summary report, drill logs and assay results for RUF claims: unpublished report, 3 p.
 
SRK Consulting, 2005, Robertson mine reclamation cost estimate 2005 three-year update: unpublished report, 17 p.
 
Stager, H. K., 1977, Geology and the mineral deposits of Lander County, Nevada; Part 2, Mineral Deposits: MBMG Bull. 88, p. 74-77.
 
 
 
Coral Gold Resources Ltd. 27-2 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
Stevenson & Associates, 1977, Geologic report on the Gold Quartz, Gold Pan and adjoining mineral deposits, Lander County, Nevada: unpublished report, 11 p.
 
Stewart, J. H., 1980, Geology of Nevada: NBMG Special Publication 4, 136 p.
 
Stewart, J. H. and Carlson, J. E., 1976, Geologic map of north-central Nevada: NBMG Map 50. The Nevada Mineral Industry, 1988: NBMG Special Publ. MI-1988, p. 14. (1989)
 
Wrucke, C. T., 1974, Geologic map of the Gold Acres-Tenabo area, Shoshone Range, Lander County, Nevada: U.S. Geol. Survey Misc. Field Studies Map MF-647.
 
Wrucke, C. T. and Armbrustmacher, T. J., 1975, Geochemical and geological relations of gold and other elements at the Gold Acres open pit mine, Lander County, Nevada: U.S. Geol. Survey Prof. Paper 860, 27 p.
 
Barnes, T., 2006 Preliminary Resource Evaluation for the Robertson Property, Lander County, Nevada, Barnes Engineering Services, Inc. on behalf of Coral Gold Resources Ltd.
 
Deutsch, C.V., Journel, A.G. 1998 GSLIB: Geostatistical Software Library and User’s Guide. Oxford University Press, Oxford, New York.
 
Houlding, S.W. 1999 Practical Geostatistics, Modeling and Spatial Analysis. Springer-Verlag, Berlin Heidelberg.
 
Isaaks, E.H. 2001 SAGE: Geostatistical A Spatial and Geostatistical Environment for Variography, Isaaks&Co., San Mateo, California.
 
Isaaks, E.H., Srivistava, R.M. 1989 An Introduction to Applied Geostatistics, Oxford University Press, Oxford, New York.
 
Mintec, inc. 2003 MineSight 3D System Software and Documentation. Mintec, inc., Tucson, Arizona.
 
Sinclair, A.J, Blackwell, G.H. 2002 Applied Mineral Inventory Estimation. Cambridge University Press.
 
Wellmer, F.-W. 1998 Statistical Evaluations in Exploration for Mineral Deposits. Springer-Verlag, Berlin Heidelberg.
 
Kelson, C. R., Crowe, D. and Stein, H., 2005, Geochronology and Geochemistry of the Hilltop, Lewis and Bullion mining districts, Battle Mountain-Eureka trend, Nevada: Geol. Soc. of America Abstr. with programs, vol. 37, No. 7, p. 314.
 
Ressel, M. W. and Henry, C. D., 2006, Igneous Geology of the Carlin Trend, Nevada: Development of the Eocene Plutonic Complex and significance for Carlin-type Gold deposits: Econ. Geol, vol. 101, p. 347-383.
 
Coral Resources, Inc. 2001. Robertson Mine Water Pollution Control Permit Renewal Application, December 2001.
 
SRK Consulting U.S., Inc. 2003. Robertson Final Plan for Permanent Closure, February 2003.
 
 
 
Coral Gold Resources Ltd. 27-3 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
SECTION 28.0 CERTIFICATE OF QUALIFIED PERSONS
 
CERTIFICATE OF AUTHOR
 
W. P. Stokes
 
I, Wilfred Peter Stokes, P.Eng., do hereby certify that:
 
1)  
I am a consulting mining engineer with an office at 113-6505 3rd Avenue, Delta, British Columbia, Canada.
 
2)  
This certificate applies to the entitled “Preliminary Economic Assessment of the Robertson Property, Lander County, Nevada, USA” January 15, 2012 (“Technical Report”) prepared for Coral Gold Resources Ltd., Vancouver, British Columbia, Canada..
 
3)  
I am a graduate of the Stoke (England) College of Technology in 1967 with a HND in Mining Engineering.
 
4)  
I am a member in good standing of the Association of Professional of Professional Engineers and Geoscientists of BC.
 
5)  
I have continuously practiced my profession performing mining engineering since 1976, both as an employee of various mining companies and since 1986 Beacon Hill Consultants a mining consulting company, as principal and independent consultant.
 
6)  
I have visited the property on a number of occasions the last was February 9, 2011.
 
7)  
In the independent report titled “Preliminary Economic Assessment of the on the Robertson Property, Elko, Nevada, USA” January 15, 2012, I am responsible for Section 1, Sections 16.1 and 16.2, Sections 18.2.12 to 18.2.17, 19, 21, 22, 24, 25 and 26. I am also responsible for overall study management and compilation.
 
8)  
I have had prior involvement as one of the authors of the report titled “Mineral Resource Estimate for the Robertson Property, Lander County, Nevada, USA” dated January 27, 2008.
 
9)  
I am independent of Coral Gold Resources Ltd. as defined in Section 1.5 of National Instrument 43- 101, other than providing consulting services
 
10)  
I have read the definition of “qualified person” set out in National Instrument 43-101 and certify that by reason of education, experience, independence and affiliation with a professional association, I meet the requirements of an Independent Qualified Person as defined in draft National Policy 43-101.
 
11)  
I am not aware of any material fact or material change with respect to the subject matter of the technical report that is not reflected in the Technical Report and that this technical report contains all scientific and technical information that is required to be disclosed to make the technical report not misleading.
 
12)  
I have read National Instrument 43-101, Standards for Disclosure of Mineral Properties and Form 43- 101F1. This technical report has been prepared in compliance with that instrument and form.
 
“W. P. Stokes”{Signed and Sealed}
 
W. P. Stokes, P.Eng.
 
Dated this 15th January, 2012 in Delta, British Columbia
 
 
 
Coral Gold Resources Ltd. 28-1 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
CERTIFICATE OF QUALIFICATION
 
I, Robert T. McCusker, do hereby certify that:
 
1)  
I am a consulting geologist residing in Lakewood, Colorado, U.S.A..
 
2)  
This certificate applies to the “Preliminary Economic Assessment of the Robertson Property, Lander County, Nevada, USA” dated January 15, 2012 prepared for Coral Gold Resources Limited, Vancouver, B. C.
 
3)  
I am a graduate of San Jose State University with a B.Sc. in Geology in 1975 and M.Sc. in Geology in 1982. I have practiced my profession continuously since 1975. I am a Professional Geologist, registered with the Wyoming Board of Registration for Professional Geologists.
 
4)  
I supervised drilling on the Robertson Property of Coral Gold Resources Limited between March 28 - April 20, 2004, November 21 - December 18, 2004, June 7 - August 13, 2005, April 30 – June 10, 2006 and August 10 - December 3, 2006, July 20 - September 8, 2007, May 20 - September 22, 2008, June 1 - July 11, 2010 and September 16 - December 11, 2010. During the period 1990-94, I was Senior Project Geologist for Amax Gold Inc. at the Robertson Property, with responsibility for supervising the evaluation of the property and preparing part of the 1994 Amax Feasibility Study;
 
5)  
In the independent report titled “Preliminary Economic Assessment of the Robertson Property”, I am responsible for preparing Sections 4-12.
 
6)  
I have read the definition of “qualified person” set out in the revised Nation Instrument 43-101 and certify that by reason of education, experience, independence and affiliation with a professional association, I meet the requirements of an Independent Qualified Person as defined in the revised National Policy 43-101.
 
7)  
I am not aware of any material fact or material change with respect to the subject matter of the technical report that is not reflected in the Technical Report.
 
8)  
I have read the revised National Instrument 43-101, Standards for Disclosure of Mineral Properties and Form 43-101FI. This technical report has been prepared in compliance with that instrument and form.
 
9)  
As of the date of this certificate, to the best of my knowledge, information and belief, this technical report contains all the scientific and technical information that is required to be disclosed to make the report not misleading.
 
“Robert T. McCusker” (signed and sealed)
 
Robert T. McCusker , P. Geol. Dated January 15, 2012
 
 
 
Coral Gold Resources Ltd. 28-2 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
CERTIFICATE OF AUTHOR
 
Garth Kirkham
 
I, Garth David Kirkham, P.Geo., do hereby certify that:
 
1)  
I am a consulting geoscientist with an office at 6331 Palace Place, Burnaby, British Columbia.
 
2)  
This certificate applies to the entitled “Preliminary Economic Assessment of the Robertson Property, Lander County, Nevada, USA” January 15, 2012 (“Technical Report”) prepared for Coral Gold Resources Ltd., Vancouver, British Columbia, Canada..
 
3)  
I am a graduate of the University of Alberta in 1983 with a B. Sc. in Geophysics.
 
4)  
I am a member in good standing of the Association of Professional Geoscientists of Ontario, Association of Professional Engineers and Geoscientists of the Province of Alberta, the Association of Professional Engineers and Geoscientists of BC, and the Northwest Territories and Nunavut Association of Engineers and Geoscientists.
 
5)  
I have continuously practiced my profession performing computer modeling since 1988, both as an employee of a geostatistical modelling and mine planning software and consulting company and as an independent consultant.
 
6)  
I have not visited the property.
 
7)  
In the independent report titled “Preliminary Economic Assessment of the on the Robertson Property, Elko, Nevada, USA” January 15, 2012, I am responsible for Section 14
 
8)  
I have had prior involvement as one of the authors of the report titled “Mineral Resource Estimate for the Robertson Property, Lander County, Nevada, USA” dated January 27, 2008.
 
9)  
I am independent of Coral Gold Resources Ltd. as defined in Section 1.5 of National Instrument 43- 101, other than providing consulting services
 
10)  
I have read the definition of “qualified person” set out in National Instrument 43-101 and certify that by reason of education, experience, independence and affiliation with a professional association, I meet the requirements of an Independent Qualified Person as defined in draft National Policy 43-101.
 
11)  
I am not aware of any material fact or material change with respect to the subject matter of the technical report that is not reflected in the Technical Report and that this technical report contains all scientific and technical information that is required to be disclosed to make the technical report not misleading.
 
12)  
I have read National Instrument 43-101, Standards for Disclosure of Mineral Properties and Form 43- 101F1. This technical report has been prepared in compliance with that instrument and form.
 
“Garth Kirkham”{Signed and Sealed}
 
Garth Kirkham, P.Geo.
 
Dated this January 15, 2012 in Burnaby, British Columbia
 
 
 
Coral Gold Resources Ltd. 28-3 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
CERTIFICATE OF AUTHOR
 
F. Wright
 
I, Frank R. Wright, P.Eng., do hereby certify that:
 
1)  
I am a consulting metallurgical engineer with an office at 427 Fairway Dr., North Vancouver, British Columbia, Canada.
 
2)  
This certificate applies to the entitled “Preliminary Economic Assessment of the Robertson Property, Lander County, Nevada, USA” January 15, 2012 (“Technical Report”) prepared for Coral Gold Resources Ltd., Vancouver, British Columbia, Canada..
 
3)  
I am a graduate of BSc. Metallurgical Engineering in 1979, from University of Alberta, Edmonton, AB; and with a Bachelor of Business Administration in 1984, from Simon Fraser University, Burnaby, BC.
 
4)  
I am a member in good standing of the Association of Professional of Professional Engineers and Geoscientists of BC.
 
5)  
I have continuously practiced my profession for performing metallurgical and mineral process engineering for 28 years, both as an employee of various mining and consulting companies, and since 1997 as an independent consultant.
 
6)  
I have not visited the Robertson Property.
 
7)  
In the independent report titled “Preliminary Economic Assessment of the on the Robertson Property, January 15, 2012, I am responsible for Section 13 and Section 26.2 of the report.
 
8)  
I have had no prior involvement with the property that is the subject of the Technical Report.
 
9)  
I am independent of Coral Gold Resources Ltd. as defined in Section 1.5 of National Instrument 43- 101, other than providing consulting services
 
10)  
I have read the definition of “qualified person” set out in National Instrument 43-101 and certify that by reason of education, experience, independence and affiliation with a professional association, I meet the requirements of an Independent Qualified Person as defined in draft National Policy 43-101.
 
11)  
I am not aware of any material fact or material change with respect to the subject matter of the technical report that is not reflected in the Technical Report and that this technical report contains all scientific and technical information that is required to be disclosed to make the sections for which I am responsible in the technical report not misleading.
 
12)  
I have read National Instrument 43-101, Standards for Disclosure of Mineral Properties and Form 43- 101F1. This technical report has been prepared in compliance with that instrument and form.
 
“Frank Wright”{Signed and Sealed}
 
Frank R. Wright, P.Eng.
 
Dated this January 15, 2012 in North Vancouver, British Columbia
 
 
 
Coral Gold Resources Ltd. 28-4 January, 2012
 
Preliminary Economic Assessment   Robertson Property
 
CERTIFICATE OF AUTHOR
 
C. M. Aurala
 
I, Corey Michael Aurala, P.Eng., do hereby certify that:
 
1)  
I am a consulting civil engineer with an office at Suite 1400 – 750 West Pender Street, Vancouver, British Columbia, Canada.
 
2)  
This certificate applies to the entitled “Preliminary Economic Assessment of the Robertson Property, Lander County, Nevada, USA” January 15, 2012 (“Technical Report”) prepared for Coral Gold Resources Ltd., Vancouver, British Columbia, Canada..
 
3)  
I am a graduate of the University of British Columbia in 2003 with a Bachelor of Applied Science degree in Civil and Environmental Engineering.
 
4)  
I am a member in good standing of the Association of Professional of Professional Engineers and Geoscientists of BC.
 
5)  
I have continuously practiced my profession performing civil engineering since 2003, as an employee of various consulting engineering companies, most currently Knight Piésold Ltd. located in Vancouver, British Columbia.
 
6)  
I have visited the property on February 9, 2011.
 
7)  
In the independent report titled “Preliminary Economic Assessment of the on the Robertson Property, Nr. Elko, Nevada, USA” January 15, 2012, I am responsible for Section 18.1-18.8.
 
8)  
I have had no prior involvement with this Project.
 
9)  
I am independent of Coral Gold Resources Ltd. as defined in Section 1.5 of National Instrument 43- 101, other than providing consulting services
 
10)  
I have read the definition of “qualified person” set out in National Instrument 43-101 and certify that by reason of education, experience, independence and affiliation with a professional association, I meet the requirements of an Independent Qualified Person as defined in draft National Policy 43-101.
 
11)  
I am not aware of any material fact or material change with respect to the subject matter of the technical report that is not reflected in the Technical Report and that this technical report contains all scientific and technical information that is required to be disclosed to make the technical report not misleading.
 
12)  
I have read National Instrument 43-101, Standards for Disclosure of Mineral Properties and Form 43- 101F1. This technical report has been prepared in compliance with that instrument and form.
 
“C.A. Aurala”{Signed and Sealed}
 
C. A. Aurala, P.Eng.
 
Dated this January 15, 2012 in Vancouver, British Columbia
 
 
 
Coral Gold Resources Ltd. 28-5 January, 2012
 
 
 
 
Coral Gold Resources Ltd. 28-6 January, 2012
 

 
 
 
 
Coral Gold Resources Ltd. 28-7 January, 2012
 
DATE AND SIGNATURE PAGE
 
"W.P. Stokes" {signed and sealed}
______________________________
W. P. Stokes, P. Eng.
Beacon Hill Consultant; (1988) Ltd.
Effective date: January 15, 2012
Signing date: Jannary 15, 2012
 
"Robert T McCusker"
_____________________________
Robert T. McCusker. P. Geo.
Geological Consultant
Effective date: January 11, 2012
Signing date: January 15, 2012
 
"Garth Kirkham" {signed and sealed}
_____________________________
Garth Kirkham, P Geo.
Kirkham Geosystems Ltd.
Effective date: January 15, 2012
Signing date: January 15, 2012
 
"Frank Wright" {signed and sealed}
_____________________________
Frank Wright. P. Eng.
F. Wright Consulting Inc.
Effective date: January 11, 2012
igning date: January 15, 2012
 
"Corey Aurala " {signed and sealed}
_____________________________
Corey Aurala, P. Eng.
Knight Piesold Ltd.
Effective date: January 15, 2012
Signing date: January 15, 2012
 
"Jeff Vaughan Parshley" {signed and sealed}
_____________________________
Jeff Vaughan Parshley, B.A. C.P.G.
SRK Consulting (U.S.) Inc.
Effective date: January 11, 2012
Signing date: January 15, 2012
 
 
 
Coral Gold Resources Ltd. 28-1 January, 2012