EX-99.1 2 d654919dex991.htm EX-99.1 EX-99.1

Exhibit 99.1

 

LOGO

Westwood Project Québec, Canada NI-43-101 Technical Report Mineral Resource and Reserve Estimate as of December 31st, 2012 Report prepared by Armand Savoie, M.Sc., Geo. Richard Morel, Eng. Francois Ferland, Eng. Westwood Project


DATE AND SIGNATURE PAGE

This report titled Ni-43-101 Technical Report, Mineral Resource and Reserve Estimate as of December 31st, 2012 Westwood Project, Québec, Canada dated October 16th, 2013 was prepared under the authority of Mr. Armand Savoie, Geologist Responsible of Mineral Resource and Reserve. He was assisted by Mr. Richard Morel, Eng., Project Leader and by Mr. François Ferland, Eng., Senior Engineer. All authors are IAMGOLD Ltd employees and act as Qualified Persons as defined by the Canadian National Instrument 43-101:

 

Dated in Preissac, Québec

     

/s/ Armand Savoie

October 16th, 2013

     

Armand Savoie, M.Sc. Geo

     

Geologist Responsible of Mineral Resource and Reserve, Westwood Project

Dated in Preissac, Québec

     

/s/ Richard Morel

October 16th, 2013

     

Richard Morel, Eng

     

Project Leader, Westwood Project

Dated in Preissac, Québec

     

/s/ François Ferland

October 16th, 2013

     

François Ferland, Eng

     

Senior Engineer, Engineering Dept.

     

Westwood Project

 


 

LOGO

Certificate of Qualified Person («QP»)

Armand Savoie

 

  1.

I, Armand Savoie, Responsible of Mineral Resources and Reserves in the Geology Department at Westwood Mine for IAMGOLD Corporation, Chemin Arthur-Doyon, Preissac, Québec, J0Y 2E0, hereby certify that:

 

  2.

I graduated from the University of Quebec in Montréal where I hold a Bachelor (1978) and Master Degree (1986) in geology.

 

  3.

I am a registered member of Québec Order of Geologists (Ordre des Géologues du Québec, # 593).

 

  4.

I have read the definition of “Qualified Person” set out in the National Instrument 43-101 (“NI 43-101”) and certified that as a result of my education, affiliation with a professional association (as defined in NI 43-101) and past relevant work experience, I fulfill the requirement to be a “Qualified Person” for the purpose of NI 43-101.

 

  5.

I worked exclusively from May 1986 to today as geologist for Doyon Mine who was owned by Lac Minerals Ltd, Barrick Gold, Cambior and now IAMGOLD Corporation. I have been in charge of exploration and production, but since September 1999 I spent most of my time for the reserve and resource estimation and 3D modeling and as a database manager for the geology department.

 

  6.

I continuously supervised the data acquisition, their localisation and plotting, and their 3D interpretation according to the methods prescribed by IAMGOLD Corporation. I am responsible for the quality assurance and controls in order to ensure the quality of our analytical results.

 

  7.

I am responsible for the sections 1 to 10, 13 and 23 to 27 of the Technical Report titled: “Ni-43-101 Technical Report, Mineral Resource and Reserve Estimate as of December 31st, 2012 Westwood Project, Québec, Canada”.

 

  8.

I am a full-time employee of IAMGOLD Corporation and I receive from my employer company shares since 1986.

 

  9.

I have read the National Instrument 43-101 and Form 43-101F1, and the Technical Report has been prepared in compliance with that instrument and form.

 

  10.

As of the date of this certificate, to the best of my knowledge, information and belief, the Technical Report contains all the scientific and technical information that is required to be disclosed to make the Technical Report not misleading.

 

  11.

I consent to the filing of Technical Report with any stock exchange or any regulatory authority and any publication by them, including electronic publication in the public company files on their websites accessible by the public, of the Technical Report.

Dated, in Preissac, on this 16th day of October 2013.

 

/s/ Armand Savoie

Armand Savoie, M.Sc. Geo.


 

LOGO

Certificate of Qualified Person («QP»)

Richard Morel, Eng.

 

1.

I, Richard Morel, Eng., Project Leader at Westwood Project for IAMGOLD Corporation, Chemin Arthur-Doyon, Preissac, Québec, J0Y 2E0, hereby certify that:

 

2.

I am graduated from the University of Montréal (École Polytechnique) in Montréal where I hold a Bachelor Degree (2003) in geological engineering.

 

3.

I am a registered member of the Québec Order of Engineers (Ordre des Ingénieurs du Québec, # 130335).

 

4.

I have read the definition of “Qualified Person” set out in the National Instrument 43-101 (“NI 43-101”) and certified that as a result of my education, affiliation with a professional association (as defined in NI 43-101) and past relevant work experience, I fulfill the requirement to be a “Qualified Person” for the purpose of NI 43-101.

 

5.

I worked for Century Mining Corporation at the Sigma Mine from November 2006 to April 2007 as production geologist. Since April 10, 2007, I work for IAMGOLD Corporation at the Westwood Project as Project Leader in exploration. Since September 2009, I spent most of my time for the reserve and resource estimation, database management and 3D modelling for the geology and exploration department;

 

6.

I continuously supervised the data acquisition and their 3D interpretation according to the method prescribed by IAMGOLD Corporation and I am responsible for implementing checking routine in order to ensure the quality of our analytical results.

 

7.

I am responsible for the sections 11, 12 and 14 of the Technical Report titled: “Westwood Project, Québec, Canada, Mineral Resources and Reserves Report as of December 31st, 2012”.

 

8.

I am a full-time employee of IAMGOLD Corporation and I receive from my employer company shares since 2007.

 

9.

I have read the National Instrument 43-101 and Form 43-101F1, and the Technical Report has been prepared in compliance with that instrument and form.

 

10.

As of the date of this certificate, to the best of my knowledge, information and belief, the Technical Report contains all the scientific and technical information that is required to be disclosed to make the Technical Report not misleading.

 

11.

I consent to the filing of Technical Report with any stock exchange or any regulatory authority and any publication by them, including electronic publication in the public company files on their websites accessible by the public, of the Technical Report.

Dated in Preissac, on this 16th day of October 2013.

 

/s/ Richard Morel
Richard Morel, Eng.


 

LOGO

Certificate of Qualified Person («QP»)

Francois Ferland, Eng.

 

1.

I, Francois Ferland, Senior Engineer in the Engineering Department at Westwood Project for IAMGOLD Corporation, Chemin Arthur-Doyon, Preissac, Québec, J0Y 2E0, hereby certify that:

 

2.

I graduated from Laval University in Québec (1984) and I hold a bachelor’s degree in Mining Engineering.

 

3.

I am a registered member of the Québec Order of Engineers (Ordre des Ingénieurs du Québec, # 45516).

 

4.

I have read the definition of “Qualified Person” set out in the National Instrument 43-101 (“NI 43-101”) and certified that as a result of my education, affiliation with a professional association (as defined in NI 43-101) and past relevant work experience, I fulfill the requirement to be a “Qualified Person” for the purpose of NI 43-101.

 

5.

I have worked for Lac Minerals, Barrick, Cambior, as well as IAMGOLD. I have worked at the Doyon Mine since 1987 as both Production Engineer and Chief Engineer. Since the closure of the Doyon Mine, I have worked at the Westwood Project as Senior Mine Engineer responsible for budget and long term planning.

 

6.

I performed or supervised the long-term mining planning and design, the establishment of operational economic parameters as well as the financial analysis, according to the methods prescribed by IAMGOLD Corporation.

 

7.

I am responsible for the Sections 15 to 22 of the Technical Report titled: “Westwood Project, Québec, Canada Mineral Resources and Reserves Report as of December 31st, 2012”.

 

8.

I am a full-time employee of IAMGOLD Corporation.

 

9.

I have read the National Instrument 43-101 and Form 43-101F1, and the Technical Report has been prepared in compliance with that instrument and form.

 

10.

As of the date of this certificate, to the best of my knowledge, information and belief, the Technical Report contains all the scientific and technical information that is required to be disclosed to make the Technical Report not misleading.

 

11.

I consent to the filing of Technical Report with any stock exchange or any regulatory authority and any publication by them, including electronic publication in the public company files on their websites accessible by the public, of the Technical Report.

Dated, in Preissac, on this 16th day of October 2013.

 

/s/ Francois Ferland
Francois Ferland, Eng.


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

TABLE OF CONTENTS

 

SECTION

   Page  

DATE AND SIGNATURE PAGE

  

1.0

  SUMMARY      1-1   
  1.1   Introduction      1-1   
  1.2   Geology and Mineralisation      1-1   
  1.3   Status of Exploration      1-2   
  1.4   Status of Development and Operations      1-3   
  1.5   Mineral Resource Estimates      1-4   
    1.5.1.   Database      1-5   
    1.5.2.   Modelling      1-6   
    1.5.3.   Statistical Analysis      1-6   
    1.5.4.   Block Modelling and Grade Interpolation      1-6   
  1.6   Conclusions and Recommendations      1-7   
    1.6.1.   General Statements      1-7   
    1.6.2.   Exploration Works      1-8   
    1.6.3.   Resource and Reserve Estimation      1-8   
  1.7   Reserves and summary of economic analysis      1-9   

2.0

  INTRODUCTION      2-1   
  2.1   Terms of Reference      2-1   
  2.2   Definitions and Units      2-1   
    2.2.1.   Units of Measurement      2-1   
    2.2.2.   Acronyms      2-2   
  2.3   Sources of Information and Data      2-3   
  2.4   Field Involvement by Report Authors      2-5   

3.0

  RELIANCE ON OTHER EXPERTS      3-1   

4.0

  PROPERTY DESCRIPTION AND LOCATION      4-1   
  4.1   Location      4-1   
  4.2   Property Description      4-2   
  4.3   Mining Titles      4-3   
  4.4   Legal Surveys      4-7   
  4.5   Requirements to Maintain the Claims in Good Standing      4-8   
  4.6   Titles and Obligations / Agreements      4-8   
  4.7   Exceptions to Title Opinion      4-8   
  4.8   Royalties and Other Encumbrances      4-9   
  4.9   Environmental Liabilities      4-9   
  4.10   Permits and Licenses      4-9   
  4.11   Other Significant Factors and Risks      4-10   

 

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5.0

  ACCESSIBILITY, CLIMATE, LOCAL RESOURCES’ INFRASTRUDCTURE AND PHYSIOGRAPHY      5-1   
  5.1   Topography and Elevation      5-1   
  5.2   Vegetation      5-1   
  5.3   Accessibility      5-1   
  5.4   Climate and Operating Seasons      5-1   
  5.5   Local Resources and Infrastructure      5-2   

6.0

  HISTORY      6-1   
  6.1   Ownership      6-2   
  6.2   Project Expenditures      6-2   
  6.3   Doyon Historical Mineral Resource and Mineral Reserve Estimates      6-4   
  6.4   Westwood Mineral Resource and Reserve Evolution      6-5   

7.0

  GEOLOGICAL SETTINGS AND MINERALISATION      7-1   
  7.1   Regional Geology      7-1   
  7.2   Local and Property Geology      7-1   
    7.2.1.   Lithology and Stratigraphy      7-3   
    7.2.2.   Structural Geology      7-7   
    7.2.3.   Alteration      7-7   
  7.3   Mineralisation      7-8   
  7.4   Geochemistry      7-11   
  7.5   Geophysics      7-11   

8.0

  DEPOSIT TYPES      8-1   
  8.1   Deposit Types      8-1   
  8.2   Investigation Concept      8-1   

9.0

  EXPLORATION      9-1   

10.0

  DRILLING      10-1   
  10.1   Previous drilling works      10-1   
  10.2   Recent and Current Drilling Programs      10-1   
  10.3   Methodology      10-3   
    10.3.1.   Planning      10-3   
    10.3.2.   Drilling      10-4   
    10.3.3.   Core Logging and Sampling      10-5   
  10.4   Drilling Results      10-6   

11.0

  SAMPLE PREPARATION, ANALYSES AND SECURITY      11-1   
  11.1   Core Shack      11-1   
  11.2   Laboratories      11-1   
    11.2.1.   On-site Laboratory      11-2   
      11.2.1.1    Sample Preparation      11-2   
      11.2.1.2    Analysis      11-4   
    11.2.2.   Laboratoire Expert Inc. Laboratory      11-5   
      11.2.2.1    Sample Preparation      11-6   
      11.2.2.2    Analysis      11-6   
  11.3   Data Verification      11-7   
    11.3.1.   Laboratories Internal Quality Control Procedures      11-8   
      11.3.1.1    On-site Laboratory      11-8   
      11.3.1.2    Lab Expert      11-9   
    11.3.2.   Geological Department Quality Control Program   
      11.3.2.1    Certified Standard Reference Material      11-9   
      11.3.2.2    Blanks      11-13   
      11.3.2.3    Renumbered Rejects      11-15   
      11.3.2.4    Comparison with External Laboratory      11-16   

 

 

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      11.3.2.5    Renumbered Pulps      11-18   
      11.3.2.6    Reject for metals re-assays      11-20   
      11.3.2.7    Sample Preservation and Storage      11-22   
  11.4   Conclusions on Sample Preparation, Analysis and Security      11-23   

12.0

  DATA VERIFICATION      12-1   
  12.1   Assay Verification      12-1   
  12.2   Database Verification      12-1   
  12.3   Discussion of Data Verification      12-2   

13.0

  MINERAL PROCESSING AND METALLURGICAL TESTING      13-1   
  13.1   Ore Characterization      13-1   
    13.1.1.   North Corridor and Zone 2      13-1   
    13.1.2.   Warrenmac-Westwood Corridor      13-7   
    13.1.3.   Warrenmac Lens      13-7   
    13.1.4.   WW25 Lens      13-9   
  13.2   Metallurgical Testwork      13-13   
    13.2.1.   Grindability Tests      13-13   
      13.2.1.1    Bond Ball Mill Grindability      13-14   
      13.2.1.2    Bond Abrasion Test      13-15   
      13.2.1.3    Miller Number Tests      13-16   
    13.2.2.   Gravity Recovery      13-16   
    13.2.3.   Flotation Tests      13-17   
      13.2.3.1    Warrenmac Results      13-17   
      13.2.3.2    WW25 Results      13-19   
    13.2.4.   Leaching tests      13-20   
      13.2.4.1    Zone 2 and North Corridor      13-20   
      13.2.4.2    Warrenmac-Westwood Corridor      13-24   
      13.2.4.3    Desulphurization      13-25   
    13.2.5.   Cyanide Destruction      13-26   
    13.2.6.   Environmental Characterization      13-26   
      13.2.6.1    Warrenmac and WW25 Lenses      13-26   
      13.2.6.2    Zone 2 Extension      13-26   
  13.3   Applicability of test work      13-27   
  13.4   Deleterious Elements      13-27   
    13.4.1.   Zinc      13-27   

14.0

  MINERAL RESOURCE ESTIMATES      14-1   
  14.1   Database      14-1   
  14.2   3D Modelling of the Mineralised Envelopes      14-1   
  14.3   Drill Hole Compositing and Grade Capping      14-4   
  14.4   Specific Gravity      14-12   
  14.5   Block Modelling      14-12   
  14.6   Grade Estimation Methodology      14-13   
  14.7   Treatment of High Gold Values      14-14   
  14.8   Resource Classification      14-14   
  14.9   Resource Estimates      14-16   
    14.9.1.   Inferred Resources      14-16   
    14.9.2.   Indicated and Measured Resources      14-19   
    14.9.3.   Base metals      14-20   
    14.9.4.   Resources inside the Bousquet Fault Corridor      14-21   

 

 

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  14.10   Validation of Results      14-23   
    14.10.1.   Composites vs. Block Grades      14-23   
    14.10.2.   Volume of the Wireframes vs. Volume of the Block Model      14-24   
  14.11   Mineral Resource Evolution      14-24   
  14.12   Evaluation of Geological Risks      14-26   

15.0

  MINERAL RESERVE ESTIMATES      15-1   
  15.1   Reserve Definition      15-1   
  15.2   Engineering Methods and Parameters      15-1   
  15.3   Reserve Estimates      15-2   
  15.4   Validation of Resource Parameters      15-4   
    15.4.1.   Reconciliation of a Test Mining      15-4   
    15.4.2.   Warrenmac Lens Development      15-4   
    15.4.3.   Stockpile      15-5   
    15.4.4.   Conclusions      15-6   
  15.5   Base Metals      15-6   

16.0

  MINING METHODS      16-1   
  16.1   Design Criteria      16-1   
    16.1.1.   Financial Parameters      16-1   
    16.1.2.   Production Requirements      16-1   
    16.1.3.   Geotechnical Considerations      16-2   
      16.1.3.1    Stress State      16-2   
      16.1.3.2    Rock Mass Classification      16-2   
      16.1.3.3    Impact on Mine Design      16-4   
    16.1.4.   Underground Infrastructure Design      16-5   
    16.1.5.   Other Considerations      16-7   
  16.2   Mining Methods      16-8   
    16.2.1.   Previous Approaches      16-8   
    16.2.2.   Development      16-8   
      16.2.2.1    Mining Method      16-8   
      16.2.2.2    Operating Parameters and Requirements      16-9   
    16.2.3.   Longhole Mining      16-9   
      16.2.3.1    Mining Method      16-9   
      16.2.3.2    Operating Parameters and Requirements      16-11   
    16.2.4.   Ore Handling      16-11   
    16.2.5.   Mine Services      16-11   

17.0

  RECOVERY METHODS      17-1   
  17.1   Design Criteria      17-1   
  17.2   Recovery Process      17-2   
    17.2.1.   General      17-2   
    17.2.2.   Flow Sheet      17-2   
      17.2.2.1    Ore Handling and Crushing      17-5   
      17.2.2.2    Grinding and Gravity      17-5   
      17.2.2.3    Cu/Zn Flotation      17-5   
      17.2.2.4    Filtration      17-6   
      17.2.2.5    Leaching      17-6   
      17.2.2.6    Cyanide Destruction      17-6   
      17.2.2.7    Desulphurization      17-7   
      17.2.2.8    Paste Backfill      17-7   
      17.2.2.9    Gold Recovery      17-8   
      17.2.2.10    Tailing Disposal      17-8   
      17.2.2.11    Further Modifications to Processing Infrastructure      17-9   

 

 

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    17.2.3.   Requirements      17-9   
      17.2.3.1    Energy      17-9   
      17.2.3.2    Water      17-9   
      17.2.3.3    Process Materials      17-10   

18.0

  PROJECT INFRASTRUCTURE      18-1   
  18.1   General      18-1   
    18.1.1.   Mine Access Road      18-2   
    18.1.2.   Municipal Works      18-2   
    18.1.3.   Electrical Supply      18-2   
    18.1.4.   Natural Gas      18-2   
    18.1.5.   Mine Service Building      18-3   
  18.2   Mine Infrastructure (Westwood Shaft Area)      18-3   
    18.2.1.   Warrenmac Ramp Portal      18-4   
    18.2.2.   Hoist Building      18-4   
    18.2.3.   Headframe Building      18-5   
    18.2.4.   Ore Handling      18-5   
    18.2.5.   Compressors      18-5   
    18.2.6.   Ventilation System      18-6   
    18.2.7.   Fuel Storage      18-6   
    18.2.8.   Environmental Infrastructure      18-6   
  18.3   Milling and Doyon Site Infrastructure      18-6   
    18.3.1.   Mill      18-7   
    18.3.2.   Environmental Infrastructure      18-7   

19.0

  MARKET STUDIES AND CONTRACTS      19-1   

20.0

  ENVIRONMENTAL STUDIES, PERMITTING AND SOCIAL OR COMMUNITY IMPACT      20-1   
  20.1   Environmental Studies      20-1   
  20.2   Waste and Tailings Disposal      20-1   
    20.2.1   Tailings Disposal      20-2   
    20.2.2   Waste Rock Dump      20-2   
    20.2.3   Mine Water Pond      20-3   
    20.2.4   Effluent Management System      20-3   
    20.2.5   Acid Rock Drainage (ARD)      20-3   
    20.2.6   Environmental Management during Operations      20-3   
  20.3   Project Permitting      20-4   
  20.4   Social and Community Impact      20-6   
  20.5   Mine Closure Plan      20-6   

21.0

  CAPITAL AND OPERATING COSTS      21-1   
  21.1   Capital Expenditures      21-1   
    21.1.1.   Pre-production Capital      21-1   
      21.1.1.1    Exploration Drilling      21-2   
      21.1.1.2    Surface Construction      21-2   
      21.1.1.3    Underground Infrastructure      21-2   
      21.1.1.4    Equipment      21-2   
      21.1.1.5    Other      21-2   
    21.1.2.   Sustaining Capital      21-3   
      21.1.2.1    Underground Development      21-3   
      21.1.2.2    Other Capital Costs      21-4   

 

 

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  21.2   Operating Costs      21-4   
    21.2.1.   Mining      21-5   
      21.2.1.1    Development and Stope Preparation      21-6   
      21.2.1.2    Extraction      21-7   
    21.2.2.   Milling      21-7   
      21.2.2.1    Mill Operations      21-7   
      21.2.2.2    Transport      21-8   
      21.2.2.3    Environment      21-8   
    21.2.3.   Administration      21-9   

22.0

  ECONOMIC ANALYSIS      22-1   
  22.1   Principal Assumptions      22-1   
    22.1.1.   Taxation Mining Duties and Royalties:      22-1   
  22.2   Cash Flow Forecast      22-1   
  22.3   Economic Summary      22-5   
  22.4   Cash Flow      22-5   
  22.5   Internal Rate of Return      22-6   
  22.6   Sensitivity      22-6   
  22.7   Investment Payback Period      22-8   

23.0

  ADJACENT PROPERTIES      23-1   

24.0

  OTHER RELEVANT DATA AND INFORMATION      24-1   

25.0

  INTERPRETATION AND CONCLUSIONS      25-1   
  25.1   General Statements      25-1   
  25.2   Opportunity      25-1   
  25.3   Project Risks      25-2   

26.0

  RECOMMENDATIONS      26-1   

27.0

  REFERENCES      27-1   
  APPENDIX A   

 

 

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LIST OF FIGURES

 

FIGURE

   Page  

FIGURE 1.7: ECONOMIC SUMMARY

     1-10   

FIGURE 4.1: PROJECT LOCATION MAP

     4-1   

FIGURE 4.2: DOYON/WESTWOOD MINING PROPERTY

     4-2   

FIGURE 4.3: MINING TITLES

     4-3   

FIGURE 6.1 : CUMULATIVE PRODUCTION AND RESERVES AT DOYON MINE

     6-4   

FIGURE 7.1 : REGIONAL/LOCAL GEOLOGY – WESTWOOD PROJECT LOCATION (PLAN & COMPOSITE LONGITUDINAL VIEWS)

     7-2   

FIGURE 7.2: DOYON-BOUSQUET-LARONDE REGIONAL STRATIGRAPHY (FROM MERCIER-LANGEVIN ET AL. 2009)

     7-4   

FIGURE 7.3: GEOLOGICAL MAP – PLAN VIEW OF LEVEL 084

     7-5   

FIGURE 7.4: SOUTH-NORTH CROSS-SECTIONAL INTERPRETATION OF THE WESTWOOD DEPOSIT

     7-6   

FIGURE 7.5: ZONE 2 EXTENSION CORRIDOR BLOCK-TEST MINING OF THE Z230 VEIN

     7-9   

FIGURE 7.6: WARRENMAC BANDED MASSIVE SULPHIDE LENS

     7-10   

FIGURE 10.1 : WORKFLOW FOR DIAMOND DRILLING PROGRAMS

     10-3   

FIGURE 10.2: PLAN VIEW LEVEL 084 (±20M), ACTUAL DEVELOPMENT, DRILL HOLES AND MINERALISED ZONES PROJECTION

     10-7   

FIGURE 10.3: NORTH-EAST INCLINED VIEW SHOWING MINERALISED BLOCKS AND MAIN ACTUAL DEVELOPMENT

     10-8   

FIGURE 10.4: COMPOSITE LONGITUDINAL SECTION A-A’ OF ZONE 2 EXTENSION CORRIDOR

     10-9   

FIGURE 10.5: COMPOSITE LONGITUDINAL SECTION B-B’ OF NORTH CORRIDOR

     10-10   

FIGURE 10.6: COMPOSITE LONGITUDINAL SECTION C-C’ OF WARRENMAC-WESTWOOD CORRIDOR

     10-11   

FIGURE 11.1 : ON-SITE LABORATORY WORKFLOW FOR SAMPLE PREPARATION

     11-3   

FIGURE 11.2 : WORKFLOW FOR GEOLOGYEXPLORATION QA/QC PROGRAM

     11-10   

FIGURE 11.3 : STD4 CONTROL CHART

     11-12   

FIGURE 11.4 : ASSAY RESULTS FOR BLANKS

     11-14   

FIGURE 11.5 : SCATTER PLOT ORIGINAL AND RE-ASSAY REJECTS

     11-15   

FIGURE 11.6 : SCATTER PLOT ORIGINAL AND RE-ASSAY REJECTS—MAY 2011 TO SEPTEMBER 2012

     11-16   

FIGURE 11.7 : SCATTER PLOT FOR BOTH LABORATORIES

     11-17   

FIGURE 11.8 : SCATTER PLOT FOR BOTH LABORATORIES (MOST RECENT DATA)

     11-17   

FIGURE 11.9 : RELATIVE CORRELATION SCATTER PLOT

     11-18   

FIGURE 11.10 : SCATTER PLOT ORIGINAL AND RE-ASSAY REJECTS

     11-19   

FIGURE 11.11 : SCATTER PLOT ORIGINAL LOG AND RE-ASSAY REJECTS

     11-19   

FIGURE 11.12 : AU SCATTER PLOT RESULTS OF BOTH LABORATORIES

     11-20   

FIGURE 11.13 : AG SCATTER PLOT RESULTS OF BOTH LABORATORIES

     11-21   

FIGURE 11.14 : CU SCATTER PLOT RESULTS OF BOTH LABORATORIES

     11-21   

 

 

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FIGURE 11.15 : ZN SCATTER PLOT RESULTS OF BOTH LABORATORIES

     11-22   

FIGURE 13.1 : NORTH CORRIDOR SAMPLE LOCATIONS

     13-3   

FIGURE 13.2 : ZONE 2 EXTENSION SAMPLE LOCATIONS

     13-3   

FIGURE 13.3 : Z230 LENS SAMPLE LOCATIONS

     13-5   

FIGURE 13.4 : Z260 LENS SAMPLE LOCATIONS

     13-6   

FIGURE 13.5 : WARRENMAC LENS SAMPLE LOCATIONS

     13-8   

FIGURE 13.6 : WW25 LENS SAMPLE LOCATIONS

     13-11   

FIGURE 13.7 : LIBERATION PROFILE IN THE SAMPLE

     13-13   

FIGURE 13.8 : BWI HISTOGRAM

     13-14   

FIGURE 13.9 : AI HISTOGRAM

     13-15   

FIGURE 13.10 : COMPARISON WESTWOOD GRG RECOVERY WITH TYPICAL GRG RESPONSES

     13-17   

FIGURE 13.11 : GOLD DISSOLUTION PROFILE

     13-23   

FIGURE 14.1: ISOMETRIC VIEW SHOWING THE MINERALISED CORRIDORS

     14-4   

FIGURE 14.2: ZONE 2 EXTENSION CUMULATIVE PLOT AND STATISTICS – UNCAPPED COMPOSITES (1M)

     14-6   

FIGURE 14.3: NORTH CORRIDOR CUMULATIVE PLOT AND STATISTICS – UNCAPPED COMPOSITES (1M)

     14-7   

FIGURE 14.4: WARRENMAC-WESTWOOD CORRIDOR ALL EXCEPT WW10, WW27 AND WARRENMAC – UNCAPPED COMPOSITES (1M)

     14-8   

FIGURE 14.5 : WARRENMAC-WESTWOOD CORRIDOR: WW10 – WW27 CUMULATIVE PLOT AND STATISTICS – UNCAPPED COMPOSITES (1M)

     14-9   

FIGURE 14.6 : WARRENMAC-WESTWOOD CORRIDOR: WARRENMAC LENS CUMULATIVE PLOT AND STATISTICS – UNCAPPED COMPOSITES (1M)

     14-10   

FIGURE 14.7: GRADE TONNAGE CURVE – INFERRED RESOURCES – DECEMBER 31ST 2012

     14-18   

FIGURE 14.8 : WESTWOOD RESOURCES EVOLUTION FROM 2007 TO 2012

     14-25   

FIGURE 14.9: MINERAL RESOURCE WATERFALL GRAPH – MAY 2011 VS DECEMBER 2012

     14-26   

FIGURE 15.1: LONGITUDINAL VIEW OF THE WARRENMAC LENS – DECEMBER 31ST 2012

     15-5   

FIGURE 16.1: GENERAL VIEW OF THE LONG TERM MINING PLAN

     16-6   

FIGURE 16.2: LONGHOLE MINING METHOD

     16-10   

FIGURE 17.1: GRINDING AND COPPER FLOTATION CIRCUIT

     17-3   

FIGURE 17.2: ZINC FLOTATION CIRCUIT

     17-3   

FIGURE 17.3: EXISTING LEACHING, ABSORPTION AND STRIPPING CIRCUIT

     17-4   

FIGURE 17.4: WATERS AND TAILINGS MANAGEMENT

     17-4   

FIGURE 18.1: SURFACE PLAN – GENERAL

     18-1   

FIGURE 18.2: SURFACE PLAN – WESTWOOD SHAFT SITE

     18-4   

FIGURE 18.3: SURFACE PLAN – DOYON SITE

     18-7   

FIGURE 20.1: DOYON PIT SCHEMATIC VIEW

     20-2   

 

 

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LIST OF TABLES

 

TABLE

   Page  

TABLE 1-1 : WESTWOOD RESOURCES EVOLUTION FROM 2007 TO 2012

     1-5   

TABLE 1-2 : TOTAL INFERRED RESOURCES BY CUT-OFFS – DECEMBER 31ST 2012

     1-7   

TABLE 4-1 : DOYON (WESTWOOD)—MINERAL CLAIMS AND MINING LEASES

     4-4   

TABLE 6-1 : PREVIOUS (1938-2004) EXPLORATION DRILLING – WESTWOOD

     6-2   

TABLE 6-2 : RECENT (2004-2012) EXPLORATION WORKS – WESTWOOD PROJECT

     6-3   

TABLE 6-3 : HISTORICAL PRODUCTION AT DOYON MINE

     6-5   

TABLE 10-1 : PREVIOUS DRILLING WORKS (1938 – 2004), WESTWOOD

     10-1   

TABLE 11-1 : RELATIVE COEFFICIENT (ROBUST) COMMENTS

     11-7   

TABLE 11-2 : PERCENTAGE OF GROSSLY OUTLIERS—COMMENTS

     11-8   

TABLE 11-3 : WESTWOOD ON-SITE LABORATORY – INTERNAL STANDARDS STATISTICS (JANUARY 2010 - SEPTEMBER 30TH 2012)

     11-8   

TABLE 11-4 : QA/QC SAMPLES SUBMITTED TO THE ON-SITE AND EXTERNAL LABORATORIES – JANUARY 2006 TO SEPTEMBER 2012

     11-11   

TABLE 11-5 : ON-SITE LABORATORY – STANDARDS STATISTICS – GEOLOGY DEPARTMENT

     11-11   

TABLE 11-6 : ON-SITE LABORATORY – STANDARDS STATISTICS – GEOLOGY DEPARTMENT STD04, 2010 ONLY

     11-13   

TABLE 13-1 : DETAILS OF MASTER COMPOSITES SAMPLES

     13-2   

TABLE 13-2 : HEAD ANALYSIS RESULTS

     13-4   

TABLE 13-3 : ZONE 2 EXTENSION CYANIDATION TESTING – JULY 2008

     13-4   

TABLE 13-4 : WARRENMAC LENS SAMPLE DETAILS

     13-7   

TABLE 13-5 : WARRENMAC LENS HEAD ASSAY AND WRA

     13-9   

TABLE 13-6 : WESTWOOD WW25 LENS SAMPLE DETAILS

     13-10   

TABLE 13-7 : HEAD ANALYSIS RESULTS OF WW25 LENS

     13-12   

TABLE 13-8 : LIBERATION AND ASSOCIATION

     13-12   

TABLE 13-9 : BOND BALL MILL GRINDABILITY TEST SUMMARY

     13-14   

TABLE 13-10 : BOND ABRASION TEST SUMMARY

     13-15   

TABLE 13-11 : BATCH CU-ZN FLOTATION TEST RESULTS – WARRENMAC

     13-18   

TABLE 13-12 : CU-ZN FLOTATION TESTS IN LOCKED CYCLE – WARRENMAC

     13-18   

TABLE 13-13 : FLOTATION PARAMETERS – WARRENMAC

     13-19   

TABLE 13-14 : RESULTS OF FLOTATION TEST IN LOCKED CYCLE – WW25

     13-19   

TABLE 13-15 : FLOTATION PARAMETERS – WW25

     13-20   

TABLE 13-16 : COMPARISON OF CIL RESULTS AND 1ST SET OF KINETIC TESTS

     13-21   

TABLE 13-17 : LEACHING TESTS – DOYON LABORATORY

     13-22   

 

 

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TABLE 13-18 : RESULTS OF BULK SAMPLE PROCESSING (Z230 LENS)

     13-22   

TABLE 13-19 : CUMULATIVE AU AN AG RECOVERIES – CYANIDATION AND FLOTATION

     13-24   

TABLE 13-20 : CYANIDATION TESTS RESULTS

     13-24   

TABLE 13-21 : DESULPHURIZATION TESTS

     13-25   

TABLE 14-1 : MINERALISED ENVELOPES – DECEMBER 31ST 2012

     14-2   

TABLE 14-2 : GRADE CAPPING VALUES (G/T) – DECEMBER 31ST 2012

     14-5   

TABLE 14-3 : UNCAPPED GOLD COMPOSITE (1M) STATISTICS

     14-11   

TABLE 14-4 : CAPPED GOLD COMPOSITE (1M) STATISTICS

     14-11   

TABLE 14-5 : BLOCK MODEL PARAMETERS

     14-13   

TABLE 14-6 : SEARCH ELLIPSE PARAMETERS

     14-13   

TABLE 14-7 : INFERRED RESOURCES BY CORRIDOR AT DIFFERENT CUT-OFF GRADES – DECEMBER 31ST 2012

     14-17   

TABLE 14-8 : TOTAL INFERRED RESOURCES BY CUT-OFFS – DECEMBER 31ST 2012

     14-18   

TABLE 14-9 : INDICATED AND MEASURED RESOURCES – DECEMBER 31ST 2012

     14-19   

TABLE 14-10 : INFERRED RESOURCES – WESTWOOD MASSIVE SULPHIDE LENSES

     14-20   

TABLE 14-11 : MEASURED RESOURCES – WESTWOOD MASSIVE SULPHIDE LENSES

     14-21   

TABLE 14-12 : PROBABLE AND PROVEN RESERVES – WESTWOOD MASSIVE SULPHIDE LENSES

     14-21   

TABLE 14-13 : INFERRED RESOURCES INSIDE THE BOUSQUET FAULT CORRIDOR

     14-22   

TABLE 14-14 : COMPOSITE VS. BLOCK MODEL (LENSES NOT CAPPED AT 15 G AU/T)

     14-23   

TABLE 14-15 : VOLUME COMPARISON

     14-24   

TABLE 14-16 : RISK MATRIX

     14-27   

TABLE 15-1 : PROVEN AND PROBABLE MINERAL RESERVES – DECEMBER 31ST 2012

     15-3   

TABLE 15-2 : BLOCK-TEST MINING RECONCILIATION 2008-2009

     15-4   

TABLE 16-1 : INSITU STRESSES FOR NUMERICAL MODELLING

     16-2   

TABLE 16-2 : INTACT ROCK PARAMETERS

     16-3   

TABLE 16-3 : JOINT FAMILIES

     16-4   

TABLE 16-4 : ROCK MASS RATINGS

     16-4   

TABLE 16-5 : LONGHOLE DILUTION RATES

     16-10   

TABLE 17-1 : ANNUAL REAGENT CONSUMPTION

     17-10   

TABLE 21-1 : SUMMARY OF CAPITAL EXPENDITURES

     21-1   

TABLE 21-2 : DEFERRED DEVELOPMENT (M)

     21-3   

TABLE 21-3 : DEFERRED DEVELOPMENT COSTS

     21-3   

TABLE 21-4 : OPERATING COST SUMMARY

     21-5   

TABLE 21-5 : UNIT COSTS ($/M) – STOPE PREPARATION COST SUMMARY

     21-6   

TABLE 21-6 : UNIT COSTS ($/M) – EXTRACTION COST SUMMARY

     21-7   

TABLE 21-7 : MILLING UNIT COST

     21-8   

 

 

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TABLE 22-1 : CASH FLOW FORECAST

     22-2   

TABLE 22-2 : YEARLY COSTS

     22-3   

TABLE 22-3 : PRODUCTION PLAN

     22-4   

TABLE 22-4 : ECONOMIC SUMMARY

     22-5   

TABLE 22.5 : DISCOUNT CASH FLOWS

     22-5   

TABLE 22.6 : IRR

     22-6   

TABLE 22.7.: SENSITIVITY

     22-7   

TABLE 22.8.: SENSITIVITY AT 7.5% DISCOUNT

     22-8   

 

 

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LIST OF APPENDICES

APPENDIX A: IAMGOLD MINERAL RESERVES AND RESOURCES/MINE PLANNING – MINIMUM RISK CONTROLS CHECKLIST

 

 

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   October 2013    xii


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Westwood Project

   NI-43-101 Technical Report

 

 

1

SUMMARY

Cautionary note: The following technical report presents the Resource and Reserve estimates as of December 31st, 2012 for the Westwood Project.

 

1.1

Introduction

This report on the Westwood project, located in the Doyon-Bousquet–Laronde gold mining camp, Quebec, Canada, provides an updated technical report with the new mineral resource and the new mineral reserve numbers as of December 31st, 2012. This report was prepared according to Canadian National Instrument 43-101 Standards of Disclosure for Mineral Projects, for the purpose of supporting certain public disclosures to be made by IAMGOLD Corporation. It has been prepared by IAMGOLD’s Westwood personnel.

The Westwood project covers an area of 2 square kilometres (196.2 Ha) in the municipality of Preissac, in Bousquet Township, approximately 40 km east of the town of Rouyn-Noranda, in the province of Quebec, Canada. The Westwood project is located entirely within the limits of the Doyon (Westwood) property, which covers an area of 20 square kilometres (1993 Ha).

The Doyon property (IAMGOLD’s former Doyon Mine) and the Westwood project are held 100% by IAMGOLD Corporation. There are no agreements, joint venture partners, or third party obligation attached to the Westwood project. All the necessary permits were obtained to build all the required surface infrastructures and the project is completely located within the surface leases. The Westwood project is fully compliant with environmental regulation and recently obtained ISO-14001 certification.

The commercial production of gold started in mid-2013 at the Westwood underground project.

 

1.2

Geology and Mineralisation

The Westwood project is part of the Doyon-Bousquet-Laronde (DBL) mining camp which is located within the Southern Volcanic Zone of the Abitibi sub-province. It is by far the largest gold-copper-zinc-silver producing district in the Quebec Province.

The Westwood project is located within the limits of the Doyon property (Figure ) which covers the Blake River Group (BRG) metavolcanic rocks and a part of the metasedimentary Cadillac (CG) and Kewagama Groups which are localized respectively to the south and north of the BRG. The Westwood deposit is

 

 

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Westwood Project

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hosted in a volcanic sequence composed of felsic volcanic rocks (Zone 2 Extension corridor), mafic to intermediate volcanic rocks (North Corridor) and intermediate to felsic volcanic rocks marked by a quartz-muscovite-sericite-calcite-garnet alteration (Warrenmac-Westwood corridor).

All lithologies of the DBL mining camp have been affected by a north-south compression event, which resulted in a sub-vertical to steeply south dipping east-west schistosity. High-strain anastomosing east-west corridors are observed throughout the property. Outside of these narrow corridors, primary volcanic textures are typically well preserved.

The Westwood mineralisation consists of gold-sulphide vein-type mineralisation such as Zones 1 and 2 at former Doyon Mine (Zone 2 Extension and North Corridor deposits) as well as gold-rich VMS-type semimassive to massive deposits (Warrenmac deposit on the western side of the Bousquet fault and Westwood deposit on the eastern side of the Bousquet fault) such as the Bousquet-2-Dumagami and Laronde-Penna deposits. All mineralised lenses are sub-parallel to the stratigraphy (sub-vertical to steeply south dipping).

Some veins in the North Corridor deposit share some analogies with the Zone 2 Extension system while others are comparable to Warrenmac-Westwood mineralisation, suggesting different origins.

 

1.3

Status of Exploration

Exploration of the Westwood deposit was realized from both surface and sub-surface works since 1938. However, most modern exploration efforts have been concentrated to the Doyon mine area, which was in operation from 1980 to 2009. The Warrenmac and Westwood showings are located in the eastern part of the Doyon (Westwood) property. The stratigraphy in the area is well defined (Bousquet Formation) and host-rocks are the same as those hosting gold and VMS mineralisation at the Bousquet and Laronde mines.

In 2002, Cambior’s Exploration team initiated compilation works based mainly on geological concepts that identified the Bousquet Formation as a favourable target at depth where anomalous alteration patterns had been recognized. An important surface exploration program on the Doyon camp was then initiated in 2002 and was very successful. Drilling programs identified high-grade gold mineralisation at depth, named the Westwood deposit, within three kilometres east of the Company’s Doyon gold mining operation.

 

 

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Westwood Project

   NI-43-101 Technical Report

 

 

An aggressive underground exploration program including 2.6 kilometres of drift development towards East from the Doyon mine was initiated in 2004 and remains in progress. Since the beginning of exploration activities in the Westwood areas in the 1930’s, more than 569,000 metres of diamond drilling contributed to resource estimation. A wealth of geological information has been gathered from the exploration and scientific activities and continues to this day.

This data is used for deposit modelling and in the calculations of ore and waste tonnage, grade distribution and resource estimates. The Westwood block model is updated at least once a year, as new information is obtained from underground development and diamond drilling works.

As will be shown in subsequent sections, the potential resource base of the Westwood project is quite important. However, the continuity of the resource can only be confirmed through additional drilling. There remains good potential to find additional resources, on both sides of the Bousquet fault. On the west side of the fault, mineralisation remains open at depth and between the current drilling areas and the fault itself. On the east side, more mineralisation could be discovered on both sides of the current delineated zones and also at depth.

Recent scientific works (Mercier-Langevin et al., 2009) have confirmed geochemical similarities between the host rocks of the main sulphide lenses at the Laronde-Penna mine and the rocks hosting the Warrenmac-Westwood mineralised corridor at Westwood. Consequently, there is excellent potential for gold-rich VMS mineralisation to occur on the property. Moreover, the Zone 2 Extension at Westwood veins are localized at the same stratigraphic level than the Doyon Main Zone #2 veins.

The 2012 exploration program was pursued at closer spacing (80 m X 80 m) for shallow depth (500m down the level 084-840m) and large spacing at great depth. Around 84,300 metres of drilling have been realized in 2012 and around 88,000 metres of drilling have been planned for 2013. These new information will contribute to an increased understanding of the project potential. New access will allow more evaluation drilling on Zone 2 Extension, North Corridor and Warrenmac-Westwood corridors in 2013.

 

1.4

Status of Development and Operations

As previously mentioned, the commercial production of gold started in mid-2013 at Westwood. Prior to 2004, all exploration drilling activities have been performed from surface. In order to begin underground exploration, the following surface and underground activities have been completed since 2004:

 

   

Development of an exploration drift (close to 3 km long) towards East starting from the Doyon 14th level at elevation 4120m (2004-2008);

 

 

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Deforestation of the surface area needed for the construction of the surface infrastructures: head frame, hoist room, service buildings, wastewater treatment basin and stockpile pads (2008);

 

   

Development of the Warrenmac ramp from the surface (elevation 4970m) down to level 036 (elevation 4568m) (2008-2010);

 

   

Construction of an exploration shaft head frame, a hoist room and service buildings (2008-2010);

 

   

Raise-boring and sinking of an exploration shaft initiated in 2008 and still under construction (1931m deep by the end of 2012, 21 feet in diameter);

 

   

Raise-boring (20 feet in diameter) for a ventilation raise between the surface and level 084 (elevation 4120m) (2009-2010);

 

   

Development of levels 036 (elevation 4568m), 060 (elevation 4354m), 084 (elevation 4120m), 104 (elevation 3920m), 132 (elevation 3646m), 140 (loading station) and 156 (elevation 3412m) and connecting ramps between levels;

 

   

Development of sill levels in the Warrenmac massive sulphide lens, which will be mined in 2013-2014.

 

1.5

Mineral Resource Estimates

The first resource estimation was performed in the first semester of 2007 for IAMGOLD Corporation. This triggered a Scoping Study in order to evaluate the economic potential of the project.

Other resource estimates were performed in July 2008 (IAMGOLD Corporation, February 27th 2009), in June 2009 (IAMGOLD Corporation, December 2009), in October 2010 (IAMGOLD Corporation, April 1st 2011), in May 2011 (IAMGOLD Corporation – March 5 2012) and in May 2012 (internal revision, non-published report) based on additional drilling information.

In September 2012, a seventh resources and reserves estimate was prepared based on additional drilling information. This report presents the updated resources and reserves estimate, which is based on assay results returned from 882 diamond drill holes.

Table 1-1 presents the resources and reserves as of December 31st, 2012.

Table 1-1 : Westwood Resources and Reserves as of December 31st, 2012

 

LOGO

 

 

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Westwood Project

   NI-43-101 Technical Report

 

 

In September 2012, a seventh resources and reserves estimate was prepared based on additional drilling information. This report presents the updated resources and reserves estimate, which is based on assay results returned from 882 diamond drill holes.

 

  1.5.1

Database

A copy of the Westwood drill holes database was made on September 1st, 2012. This copy was used to produce the resource estimates presented in this report. The database consisted of 1,746 diamond drill holes (both surface and underground holes) for a total of 569,465 metres (drilled and planned). The total number of samples was 167,862.

 

 

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Westwood Project

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  1.5.2

Modelling

Modelling work is done using the GEMS version 6.2.4 software package. The mineralisation interpretation is performed using vertical 3D rings created on cross-sections and then checked using horizontal 3D rings created on plan views to avoid unexpected changes of direction to ensure lateral continuity. All vertical and horizontal 3D rings are snapped to intersecting drill holes.

Extensions of the mineralised zones are restricted to a maximum of 50 metres (E-O direction) and 100 metres vertically from the drill holes information. Minimum width is set to 2.0 metres (true width) even if the mineralisation could be contained within 10 to 25 centimetres veins.

All the 3D rings drawn on plan views are attached together with tie lines to create a full 3D skeleton of each ore zone from which 3D solids are built and validated.

 

  1.5.3

Statistical Analysis

Sample lengths vary from 0.5 to 1.5 metres and average about 1.0 metre. All drill holes assay values are grouped into composites of length equals to the mineralised zone width. Zone width is generally constant and ranges between 2 and 3 metres.

Based on the log normal graphs and the experience of the Doyon Mine’s geologists, Zone 2 Extension assays were capped to a grade*thickness value of 99 g*m/t which translates into 66 g Au/t over 1.5 metre length, 99 g Au/t over 1.0 metre or 198 g Au/t over 0.5 metre. North Corridor assays were capped to a grade*thickness value of 60 g*m/t which translates into 40 g Au/t over 1.5 metres length, 60 g Au/t over 1.0 metre or 120 g Au/t over 0.5 metre. The Warrenmac-Westwood corridor is mineralised on all the width of the zone, compared to the previous horizons that consist of centimetre veins. Therefore all the assay grades were capped at 20 g Au/t in the Warrenmac-Westwood corridor, except for the WW10 and parts of the WW27 veins and the Warrenmac massive sulphide lens that were cut at 40 g/t for all assay lengths.

 

  1.5.4

Block Modelling and Grade Interpolation

The block modelling estimation is done using the GEMS version 6.2.4 software package. One block model is constructed for the entire Westwood deposit. The geologists are responsible for updating the mineralised 3D models with the new intersections at the completion of every diamond drilling campaign. The Westwood block model is updated at least once a year, or each time a resource estimate is required.

 

 

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Westwood Project

   NI-43-101 Technical Report

 

 

Interpolations of grades in the block model are performed using the Inverse Distance Squared Technique (ID2) using the capped composite inside each mineralised zone.

Table 1-2 summarizes the inferred resource estimation for Westwood project as at December 31st 2012.

Table 1-2 : Total inferred resources by cut-offs – December 31st 2012

 

LOGO

 

1.

CIM definitions were followed for Mineral Resources Classification

2.

All lenses capped at 15g Au/t

3.

A minimum width of 2 metres was used

4.

Numbers may not add due to rounding

 

1.6

Conclusions and Recommendations

 

  1.6.1

General Statements

In the opinion of the authors, the data available to prepare this technical report is both credible and verifiable in the field. It is also the opinion of the authors that no material information relative to the Westwood Project has been neglected or omitted from the database. Sufficient information is available to prepare this report and any statements in this report related to deficiency of information are directed at information which, in the opinion of the authors, has not yet been gathered or is recommended information to be collected as the project moves forward.

The lead authors’ statements and conclusions in this report are based upon the information from underground mapping and sampling and the exploration database used for the December 31st 2012 resource estimate. Exploration is ongoing at the Westwood project and it is to be expected that new data and exploration results may change some interpretations, conclusions, and recommendations going forward.

 

 

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Westwood Project

   NI-43-101 Technical Report

 

 

This report includes technical information, which requires subsequent calculations to derive sub-totals, totals, and weighted averages. Such calculations inherently involve a degree of rounding and consequently can introduce a margin of error. Where these rounding errors occur, IAMGOLD does not consider them to be material.

 

  1.6.2

Exploration Works

Significant additional drilling and underground development will be required to further delineate the mineralisation, expand the resource base and adequately constrain the resource models and to upgrade inferred resource to the indicated and measured categories. The ultimate size of mineralised bodies at the Westwood project is yet to be defined, especially at depth and laterally, on both sides of the Bousquet Fault Zone.

Recent scientific works (Mercier-Langevin et al. 2009) have confirmed geochemical similarities between the host rocks of the main sulphide lenses at the Laronde-Penna mine and the rocks hosting the Warrenmac-Westwood mineralised corridor at Westwood. Consequently, there is excellent potential for gold-rich VMS mineralisation to occur on the Doyon (Westwood) property. Moreover, the Zone 2 Extension veins at Westwood are localized at the same stratigraphic level than the Doyon Main Zone #2 veins.

The 2013 exploration program will pursue at closer spacing (80 m X 80 m) for shallow depth (500m down the 084 level) and large spacing at great depth. New access will allow more valuation drilling on the three corridors for the same period. Around 84,300 metres of drilling have been drilled in 2012 and 88,000 metres of drilling have been planned for 2013 in all drilling categories.

 

  1.6.3

Resource and Reserve Estimation

The Warrenmac massive sulphide lens was converted to proven reserves in September 2012. The Warrenmac lens will be mined in 2013-2014.

 

 

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Westwood Project

   NI-43-101 Technical Report

 

 

With additional valuation drilling in the Westwood and Zone 2 Extension corridors for the next year and with the future development and valuation works scheduled in 2013 in the WW10 and WW20 lenses as well as in some Zone 2 Extension lenses (Z230 and Z260 for example), transfer of inferred resources to the measured and indicated resource categories and eventually to reserves is likely to happen. Mineralisation is still open at depth and there is a very good potential to expand the resource base with additional drilling programs.

Based on the review of the Westwood project for the purpose of this report, the author makes the following recommendations:

 

   

Continuation of the drilling program and drifting in accessible areas to refine our understanding of the mineralised veins.

 

   

Additional definition drilling to increase our ratio of indicated and measured resources to inferred resources and also the definition of some probable and even proven reserves.

 

   

Density measurements should be taken on a regular basis for the deeper drill holes to determine if there is a difference with historical density used in the resource estimation on upper levels.

 

   

We continue the implementation of a program for a daily monitoring of the internal QA/QC assays. We have already seen a better control of outliers. We are presently installing a LIMS program (with a barcode system) at our on-site Laboratory to use a fast and efficient data management system which will eliminate several database errors such those related to manual data entries.

Mining method and width: All the calculations done to date clearly demonstrate that production grade will have the most important impact on the project. A review will be necessary to optimize the mining method and the mining width when additional geological information is available and increased density of drill intersections.

 

1.7

Reserves and summary of economic analysis

In this report a portion of the indicated resources were transferred into probable reserves and a portion of the measured resources transferred into proven reserves at the end of December 2012. The Mineral Reserve was calculated using the 6 g Au/t cut-off grade and include a dilution of 40%. This cut-off grade was calculated using the production plan presented in Chapter 22 as well as the mining method parameters presented in Chapter 16 and the costs presented in Chapter 21.

 

 

Section 1.0    October 2013    1-9


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

The Westwood project Mineral Reserve as of December 31st 2012, total 1,315,000 tonnes grading 8.2 g Au/t for 348,000 ounces with a dilution of 40%.

The economic evaluation summary based on those values is presented in table 1.7. For an average gold price of 1,375 $/ounce over the expected production period of 4 years for the reserves and with a mill recovery of 94%, the total cash flow is forecasted at 43M$ before taxes. After mill recovery of 94%, the total ounces produced are 326,000 ounces. All the mining parameters and design criteria are presented in chapters 16 and 17 and covers every aspects from development, extraction, environmental, mill processing and administration.

Figure 1.7: Economic summary

 

Tonnes Mined (000)

     1 316   

Tonnes Milled (000)

     1 316   

Grade (g Au/t)

     8,2   

Gold Production (000 oz)

     326   

Gold Revenues

     466  M$ 

 

     $/t milled  

Mining

     143,00   

Milling

     30,00   

Administration

     22,00   
  

 

 

 

Total Operating

     195,00   
     787  $/oz 

Operating Cash Flow

     219  M$ 

Capital Expenditures

     176  M$ 

Net Cash Flow (Before Tax)

     43  M$ 

 

 

Section 1.0    October 2013    1-10


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

2

INTRODUCTION

Cautionary note: The following technical report presents the Resource and Reserve estimates as of December 31st, 2012 for the Westwood Project.

 

2.1

Terms of Reference

This technical report is prepared for IAMGOLD Corporation, sole owners of the Westwood Project. The report serves to describe and declare the resource and reserve estimates as at December 31st 2012.

This report is complies with disclosure and reporting requirements set forth in the Toronto Stock Exchange manual, National Instrument 43-101 Standards of Disclosure for Mineral Projects (NI 43-101), and Companion Policy 43-101CP to NI 43-101, and Form 43-101F1 of NI 43-101. The Westwood Project is 100% owned by IAMGOLD Corporation.

 

2.2

Definitions and Units

The metric (SI System) units of measure are used in this report. Analytical results are generally reported as parts per billion (ppb), parts per million (ppm), or grams per tonne (g/t) contained for gold (Au), parts per million (ppm), or grams per tonne (g/t) for contained silver (Ag), and percentage for zinc (Zn) and copper (Cu). Monetary figures are expressed in Canadian dollars ($) unless otherwise specified.

Tables and Figures in this report are numbered consecutively and referenced to the major sections of the report (i.e.: Figures 10.1 through 10.6 for Figures in Section 10.0).

 

  2.2.1

Units of Measurement

The following list of conversions is provided for the convenience of readers that are more familiar with the Imperial system.

 

 

Linear Measure

  
 

1 centimetre (cm)

  

= 0.394 inches

 

1 metre (m)

  

= 3.2808 feet

 

1 kilometre (km)

  

= 0.6214 miles

 

 

Section 2.0    October 2013    2-1


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

 

Area Measure

     
 

1 hectare

  

= 100 m by 100 m

  

= 2.47 acres

 

1 square kilometre

  

= 247.1 acres

  

= 0.3861 square miles

 

Weight

     
 

1 metric tonne

  

= 2204.6 pounds

  

= 1.1023 short tons

 

1 kilogram (kg)

  

= 35.274 oz. = 2.205 pounds = 32.151 troy ounces

 

Analytical Values

     
 

Gram/tonne (g/t)

  

= 1.0 ppm = 0.0321507 oz.

  
 

Troy oz/tonne

  

= 0.0291667 oz. Troy/short ton

 

Oz. Troy/tonne

  

= 31.1035 g/t

  
 

1.0 oz. Troy/short ton

  

= 34.2857 g

  

 

  2.2.2

Acronyms

Frequently used acronyms are listed below.

 

AA

   Atomic absorption spectroscopy, an analytical procedure

CF Plot

   Cumulative Frequency Plot; a graphical statistical display of a range of data values

CP Plot

   Cumulative Probability Plot; a graphical statistical based on the probabilities

ICP

   Inductively-coupled plasma emission spectroscopy, an analytical procedure

QA/QC

   Quality Assurance/Quality Control; procedures used to assure accuracy and consistency of analytical results

 

 

Section 2.0    October 2013    2-2


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

g Au/t

  

Grams of gold per tonne

g Ag/t

  

Grams of silver per tonne

oz/t

  

Ounces Troy per (metric) tonne

oz/T

  

Ounces Troy per (short) ton

ppb

  

Parts per billion

ppm

  

Parts per million

CFM

  

Cubic feet per minute, a measure of ventilation rates

Tpd

  

Tonnes per day, a measure of throughput

Tpy

  

Tonnes per year, a measure of throughput

 

2.3

Sources of Information and Data

The source of information for this technical report is based on geological reports, maps and miscellaneous reports listed in the Reference section. The authors reviewed the available data and conducted field investigations to confirm the data. The data sources include hard copy data and files and digital files located in the offices of IAMGOLD Corporation. In addition, drill core mineralisation was examined at the Doyon mine site for the Westwood project.

The source of information for this technical report is also based on data obtained in the Mineral Resources Reports produced between 2007 and 2012. The information and data contained in this technical report come from:

 

   

IAMGOLD Corporation – Preliminary Assessment, August 2007

 

   

IAMGOLD Corporation – NI 43-101 Technical Report, February 27th 2009

 

   

IAMGOLD Corporation – Revised Scoping Study NI 43-101 Technical Report, December 2009 (internal report)

 

   

IAMGOLD Corporation – NI 43-101 Technical Report, April 1st 2011 (internal report)

 

   

IAMGOLD Corporation – Mineral Resources Report, March 5 2012

 

   

IAMGOLD Corporation – Mineral Resources Report, May 2012 (internal report)

 

 

Section 2.0    October 2013    2-3


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

These documents were prepared by, or under the supervision, of geologists and engineers who are Qualified Person as defined in Canadian National Instrument 43-101. In this sense, the information should be considered as reliable.

Geotechnical information and recommendations were provided by consultants from Golder Associates and Montreal’s Ecole Polytechnique. Mine Engineering personnel reviewed all reports for inclusion in the mining plan. Report details are included in Section 27.

Metallurgical testing was performed by a number of external consultants, as detailed in Section 13. Current metallurgical processes are based in part on their findings and recommendations. Report details are included in Section 27.

In addition, the following material stored on the Westwood computer network has been used:

 

   

Gems 6.2.4 database containing the block model with different attributes

 

   

Drill hole database (Gems 6.2.4) containing collar location, down-hole survey, assay, geology, lithogeochemistry and geotechnical data

 

   

Three-dimensional models of the interpreted ore zones, topography and lithology (Gems 6.2.4)

 

   

Grade block models

 

   

Quality control data

 

   

Bulk density data

 

   

Cost parameters for calculation of economic cut-offs

 

   

Historical resources estimates

 

   

Description of the metallurgical process and operating statistics

The following IAMGOLD personnel participated in the preparation of this technical report:

 

   

Armand Savoie, M.Sc.Geo., Geologist Responsible of Mineral Resource and Reserve, Westwood project

 

   

Richard Morel, Eng., Project Leader, Westwood project

 

   

François Ferland, Eng., Senior Engineer, Westwood project

 

   

Claude Bernier, Eng., Project Supervisor – Geologist, Westwood project

 

   

David Yergeau, Ph.D. student, INRS, on the Westwood project (review of chapter 7 and 8).

 

   

Emilie Williams, Eng., Chief Engineer, Mouska Mine

 

 

Section 2.0    October 2013    2-4


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

2.4

Field Involvement by Report Authors

Mr. Armand Savoie M.Sc.Geo., Mineral resource and reserve Geologist, Doyon Mine and Westwood Project, IAMGOLD Corporation, works onsite and is the Responsible of the Mineral resource and reserve Database for Doyon Mine and Westwood Project. He also conducted a review of data and maps in IAMGOLD’s Westwood/Doyon office, as well as the database of drill holes generated since September 2006. Mr Savoie is the lead author of this updated Technical Report and is the “Qualified Person” as defined by NI 43-101. He contributed to the preparation of Sections 1 to 14 and 23 to 27.

Mr. Richard Morel, Eng., Project Manager, Westwood Project, IAMGOLD Corporation, works onsite and is co-responsible of the Mineral resource and reserve Database for Doyon Mine and Westwood Project. He also conducted a review of data and maps in IAMGOLD’s Westwood/Doyon office, as well as the database of drill holes generated since September 2006. Mr. Morel mostly contributed to the follow-up and the update of this Technical Report and is the “Qualified Person” as defined by NI 43-101. He also contributed for the preparation of Sections 11, 12 and 14.

Mr. François Ferland, Eng., Senior Engineer, Westwood project, IAMGOLD Corporation, works on site and is responsible of the Mineral reserve calculations for the Westwood project. Mr. Ferland mostly contributed to the follow-up and the update of this Technical Report and is the “Qualified Person” as defined by NI 43-101. He also contributed to the preparation of Sections 15 to 22.

 

 

Section 2.0    October 2013    2-5


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

3

RELIANCE ON OTHER EXPERTS

The authors have relied upon data provided by IAMGOLD Technical Services and Westwood personnel. Department managers validated information related to their departments (e.g. operating parameters and conditions), particularly in Sections 16 (Mining Methods) and 18 (Project Infrastructure). Figures were prepared by staff in the engineering departments, supervised by the qualified persons as well as Guy Gosselin, ing., Technical Services Superintendant.

The authors relied upon Mrs. Marie-France Bugnon, P.Geo, General Manager Exploration, IAMGOLD Corporation with respect to the land tenure and title (Sections 4.3 to 4.6).

The authors relied upon Mrs. Annie Blier, Director, Environment, IAMGOLD Corporation with respect to environment laws, liabilities, and permits (Sections 4.9 to 4.10 and Section 20).

The authors relied upon Mr. Pierre Pelletier, Eng., Vice-President – Metallurgy, IAMGOLD Corporation with respect to metallurgy testing (Section 13) and recovery methods (Section 17).

The authors consider the information presented in this report to be considered reliable.

 

 

Section 3.0    October 2013    3-1


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

4

PROPERTY DESCRIPTION AND LOCATION

 

4.1

Location

The Westwood project is located in the Quebec province, Canada at a latitude of 48° 15’ North and a longitude of 78° 30’ West (Figure ). The project is located in the municipality of Preissac, Bousquet Township, approximately 40 km east of the town of Rouyn-Noranda and 80 km west of the town of Val-d’Or. The Westwood project covers an area of 2 square kilometres (196.2 Ha) and it is located entirely within the limits of the Doyon property (hereafter the Doyon (Westwood) property), which covers an area of 20 square kilometres (1,992.9 Ha).

Figure 4.1: Project Location Map

 

LOGO

 

 

Section 4.0    October 2013    4-1


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

4.2

Property Description

The Doyon (Westwood) property extends over 5 km east-west by approximately 5 km north-south (Figures 4.2 and 4.3). It is bounded on the West by the IAMGOLD Mouska-Authier Property and on the South and East by the Agnico-Eagle Laronde Property. The Westwood project covers an area of 2 square kilometres (B.M. 1002, 196.2 Ha) and it is located on the eastern part of the of the Doyon (Westwood) property,

The topography is relatively flat, at about 340m above sea level, with hills generally less than thirty metres. Glacial overburden thickness ranges from 0 to 35 metres. The northeast striking Bousquet River Fault crosscuts the Westwood project into two parts.

Figure 4.2: Doyon/Westwood Mining Property

 

LOGO

 

 

Section 4.0    October 2013    4-2


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

4.3

Mining Titles

The Doyon (Westwood) property consisted originally of 116 mineral claims and one (1) mining lease (B.M. 0695 for the Doyon mine). The property limits were modified in 2012 to include a new mining lease covering the Westwood project itself (B.M. 1002). All mining claims affected by the delineation of this new mining lease have been suspended by the Québec Ministry of Natural Resources and Fauna (MRNF), awaiting to either be removed from the mining titles register or to have their final modified description defined (surface area). The property globally covers a total surface area of 1,992.91 Ha (Figure 4.3). Three (3) tailing surface leases (P.R. 999780, P.R. 999794 and P.R. 999803) are superimposed over part of the property. The titleholder name of all those claims and leases is IAMGOLD Corporation at 100% and all those claims are in the Bousquet Township. Details are listed in Table 4-1.

Figure 4.3: Mining Titles

 

LOGO

 

 

Section 4.0    October 2013   

4-3


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

Table 4-1 : Doyon (Westwood)—Mineral Claims and Mining Leases

 

Township

  

Row

  

Column

  

Title

  

Status

   Date of
registration
     Expiry Date      Surface
Area
(ha)
 

Bousquet

  

L460

  

6906

  

BM 1002

  

Active

     2012-04-23         2032-04-22         196.23   

Bousquet

  

000E

  

0000

  

BM 695

  

Active

     1980-07-03         2020-07-02         312.51   

Bousquet

  

0034

  

0023

  

CL 2514873

  

Active

     1966-12-19         2014-11-30         1.3   

Bousquet

  

0034

  

0021

  

CL 2653051

  

Active

     1967-08-30         2013-08-12         16   

Bousquet

  

0034

  

0022

  

CL 2653052

  

Active

     1967-08-30         2013-08-12         17.6   

Bousquet

  

0035

  

0021

  

CL 2653053

  

Active

     1967-10-18         2013-08-12         12.4   

Bousquet

  

0030

  

0030

  

CL 2910241

  

** Suspended

     1969-02-03         2015-01-15         22.4   

Bousquet

  

0031

  

0030

  

CL 2910242

  

** Suspended

     1969-02-03         2015-01-15         14   

Bousquet

  

0032

  

0024

  

CL 2910243

  

** Suspended

     1969-02-03         2015-01-15         6.8   

Bousquet

  

0031

  

0029

  

CL 2910244

  

* Suspended

     1969-02-03         2015-01-15         22.8   

Bousquet

  

0031

  

0028

  

CL 2910245

  

* Suspended

     1969-02-03         2015-01-15         26.4   

Bousquet

  

0033

  

0029

  

CL 2910251

  

Active

     1969-02-03         2015-01-15         16   

Bousquet

  

0032

  

0029

  

CL 2910252

  

** Suspended

     1969-02-03         2015-01-15         9.6   

Bousquet

  

0032

  

0028

  

CL 2910253

  

** Suspended

     1969-02-03         2015-01-15         28   

Bousquet

  

0031

  

0027

  

CL 2910254

  

* Suspended

     1969-02-03         2015-01-15         16   

Bousquet

  

0030

  

0026

  

CL 2910255

  

* Suspended

     1969-02-03         2015-01-15         14   

Bousquet

  

0033

  

0027

  

CL 2930951

  

** Suspended

     1969-02-17         2015-01-31         30.8   

Bousquet

  

0032

  

0027

  

CL 2930952

  

** Suspended

     1969-02-17         2015-01-31         15.6   

Bousquet

  

0033

  

0025

  

CL 2930953

  

Active

     1969-02-17         2015-01-31         7.1   

Bousquet

  

0031

  

0026

  

CL 2930954

  

* Suspended

     1969-02-17         2015-01-31         12.3   

Bousquet

  

0031

  

0025

  

CL 2930955

  

** Suspended

     1969-02-17         2015-01-31         3.3   

Bousquet

  

0033

  

0020

  

CL 2980591

  

Active

     1969-06-18         2015-06-02         10   

Bousquet

  

0033

  

0019

  

CL 2980592

  

Active

     1969-06-18         2015-06-02         9.2   

Bousquet

  

0033

  

0018

  

CL 2980593

  

Active

     1969-06-18         2015-06-02         14   

Bousquet

  

0032

  

0019

  

CL 2980594

  

Active

     1969-06-18         2015-06-02         12   

Bousquet

  

0031

  

0018

  

CL 2980595

  

Active

     1969-06-18         2015-06-02         9.7   

Bousquet

  

0036

  

0021

  

CL 3073251

  

Active

     1970-07-02         2015-06-15         10.4   

Bousquet

  

0035

  

0022

  

CL 3073252

  

Active

     1970-07-02         2015-06-15         11.6   

Bousquet

  

0035

  

0023

  

CL 3073253

  

Active

     1970-07-02         2015-06-15         12.8   

Bousquet

  

0030

  

0027

  

CL 3207861

  

** Suspended

     1971-12-28         2014-12-08         18   

Bousquet

  

0030

  

0028

  

CL 3207862

  

** Suspended

     1971-12-28         2014-12-08         22.8   

Bousquet

  

0029

  

0027

  

CL 3207863

  

Active

     1971-12-28         2014-12-08         10   

Bousquet

  

0029

  

0028

  

CL 3207864

  

Active

     1971-12-28         2014-12-08         7.2   

Bousquet

  

0029

  

0029

  

CL 3207865

  

Active

     1971-12-28         2014-12-08         5.6   

Bousquet

  

0029

  

0030

  

CL 3207871

  

Active

     1971-12-28         2014-12-08         9.2   

Bousquet

  

0035

  

0024

  

CL 3230362

  

Active

     1972-05-05         2015-04-11         15.4   

Bousquet

  

0036

  

0023

  

CL 3230364

  

Active

     1972-05-05         2015-04-11         14.4   

 

 

Section 4.0    October 2013    4-4


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

Township

  

Row

  

Column

  

Title

  

Status

   Date of
registration
     Expiry Date      Surface
Area
(ha)
 

Bousquet

  

0030

  

0023

  

CL 3319131

  

Active

     1973-03-12         2015-02-20         13.8   

Bousquet

  

0030

  

0024

  

CL 3319132

  

Active

     1973-03-12         2015-02-20         14.2   

Bousquet

  

0029

  

0025

  

CL 3319134

  

** Suspended

     1973-03-12         2015-02-20         23.2   

Bousquet

  

0028

  

0025

  

CL 3319135

  

Active

     1973-03-12         2015-02-20         18.4   

Bousquet

  

0029

  

0023

  

CL 3319141

  

Active

     1973-03-12         2015-02-21         16.5   

Bousquet

  

0029

  

0024

  

CL 3319142

  

Active

     1973-03-12         2015-02-21         16.4   

Bousquet

  

0028

  

0024

  

CL 3319143

  

Active

     1973-03-12         2015-02-21         18.4   

Bousquet

  

0028

  

0023

  

CL 3319144

  

Active

     1973-03-12         2015-02-21         20   

Bousquet

  

0029

  

0026

  

CL 3319145

  

** Suspended

     1973-04-09         2015-02-21         16.4   

Bousquet

  

0031

  

0019

  

CL 3362035

  

Active

     1973-04-24         2015-04-03         1.8   

Bousquet

  

0032

  

0017

  

CL 3433161

  

Active

     1974-02-21         2015-02-04         16   

Bousquet

  

0031

  

0017

  

CL 3433162

  

Active

     1974-02-21         2015-02-04         16   

Bousquet

  

0031

  

0016

  

CL 3433163

  

Active

     1974-02-21         2015-02-04         16   

Bousquet

  

0031

  

0015

  

CL 3433164

  

Active

     1974-02-21         2015-02-04         16   

Bousquet

  

0031

  

0014

  

CL 3433165

  

Active

     1974-02-21         2015-02-04         16   

Bousquet

  

0032

  

0018

  

CL 3433171

  

Active

     1974-02-21         2015-02-03         16   

Bousquet

  

0033

  

0017

  

CL 3433172

  

Active

     1974-02-21         2015-02-03         16   

Bousquet

  

0032

  

0016

  

CL 3433173

  

Active

     1974-02-21         2015-02-03         16   

Bousquet

  

0032

  

0015

  

CL 3433174

  

Active

     1974-02-21         2015-02-03         16   

Bousquet

  

0032

  

0014

  

CL 3433175

  

Active

     1974-02-21         2015-02-03         16   

Bousquet

  

0030

  

0016

  

CL 3434523

  

Active

     1974-04-08         2015-03-19         16   

Bousquet

  

0034

  

0025

  

CL 3435471

  

Active

     1975-01-27         2015-01-26         13.7   

Bousquet

  

0034

  

0026

  

CL 3435472

  

Active

     1975-01-27         2015-01-26         15.5   

Bousquet

  

0034

  

0027

  

CL 3435473

  

Active

     1975-01-27         2015-01-26         15.1   

Bousquet

  

0033

  

0026

  

CL 3435474

  

Active

     1975-04-28         2015-01-26         2.1   

Bousquet

  

0032

  

0025

  

CL 3566831

  

Active

     1975-11-06         2013-10-19         0.3   

Bousquet

  

0031

  

0024

  

CL 3609191

  

Active

     1976-10-04         2013-10-03         0.1   

Bousquet

  

0030

  

0025

  

CL 3609192

  

** Suspended

     1976-10-04         2013-10-03         8.1   

Bousquet

  

0040

  

0019

  

CL 3681461

  

Active

     1977-09-07         2013-08-21         16   

Bousquet

  

0040

  

0020

  

CL 3681462

  

Active

     1977-09-07         2013-08-21         16   

Bousquet

  

0039

  

0021

  

CL 3681463

  

Active

     1977-09-07         2013-08-21         16   

Bousquet

  

0035

  

0025

  

CL 3681711

  

Active

     1977-09-08         2013-08-21         16   

Bousquet

  

0035

  

0026

  

CL 3681712

  

Active

     1977-09-08         2013-08-21         16   

Bousquet

  

0035

  

0027

  

CL 3681714

  

Active

     1977-09-08         2013-08-21         16   

Bousquet

  

0035

  

0028

  

CL 3681721

  

Active

     1977-09-08         2013-08-22         16   

Bousquet

  

0035

  

0029

  

CL 3681722

  

Active

     1977-09-08         2013-08-22         16   

Bousquet

  

0035

  

0030

  

CL 3681723

  

Active

     1977-09-14         2013-08-22         16   

Bousquet

  

0033

  

0028

  

CL 3681724

  

Active

     1977-09-08         2013-08-22         16   

Bousquet

  

0034

  

0028

  

CL 3681725

  

Active

     1977-09-08         2013-08-22         16   

 

 

Section 4.0    October 2013    4-5


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

Township

  

Row

  

Column

  

Title

  

Status

  

Date of
registration

  

Expiry Date

  

Surface

Area (ha)

Bousquet

  

0037

  

0021

  

CL 3690881

  

Active

   1977-08-29    2013-08-09    16

Bousquet

  

0038

  

0021

  

CL 3690882

  

Active

   1977-08-29    2013-08-09    16

Bousquet

  

0038

  

0020

  

CL 3690883

  

Active

   1977-08-29    2013-08-09    16

Bousquet

  

0039

  

0020

  

CL 3690884

  

Active

   1977-08-29    2013-08-09    16

Bousquet

  

0040

  

0021

  

CL 3690885

  

Active

   1977-08-29    2013-08-09    16

Bousquet

  

0039

  

0019

  

CL 3690901

  

Active

   1977-08-29    2013-08-09    6

Bousquet

  

0038

  

0019

  

CL 3690902

  

Active

   1977-08-29    2013-08-09    16

Bousquet

  

0028

  

0027

  

CL 3695151

  

Active

   1978-10-02    2015-01-03    16

Bousquet

  

0028

  

0026

  

CL 3695152

  

Active

   1978-10-02    2015-01-03    10.4

Bousquet

  

0030

  

0022

  

CL 3695153

  

Active

   1978-10-02    2015-01-03    4.4

Bousquet

  

0039

  

0026

  

CL 3717134

  

Active

   1978-05-15    2015-04-21    16

Bousquet

  

0040

  

0026

  

CL 3717135

  

Active

   1978-05-15    2015-04-21    16

Bousquet

  

0038

  

0026

  

CL 3718373

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0038

  

0027

  

CL 3718374

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0038

  

0028

  

CL 3718375

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0036

  

0022

  

CL 3718561

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0037

  

0022

  

CL 3718562

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0038

  

0022

  

CL 3718563

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0039

  

0022

  

CL 3718564

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0040

  

0022

  

CL 3718565

  

Active

   1978-05-10    2015-04-21    8

Bousquet

  

0037

  

0023

  

CL 3718571

  

Active

   1978-05-10    2015-04-22    16

Bousquet

  

0038

  

0023

  

CL 3718572

  

Active

   1978-05-10    2015-04-22    16

Bousquet

  

0039

  

0023

  

CL 3718573

  

Active

   1978-05-10    2015-04-22    16

Bousquet

  

0040

  

0023

  

CL 3718574

  

Active

   1978-05-10    2015-04-22    16

Bousquet

  

0040

  

0024

  

CL 3718575

  

Active

   1978-05-10    2015-04-22    16

Bousquet

  

0039

  

0024

  

CL 3718581

  

Active

   1978-05-10    2015-04-23    16

Bousquet

  

0038

  

0024

  

CL 3718582

  

Active

   1978-05-10    2015-04-23    16

Bousquet

  

0038

  

0025

  

CL 3718583

  

Active

   1978-05-10    2015-04-23    16

Bousquet

  

0039

  

0025

  

CL 3718584

  

Active

   1978-05-10    2015-04-23    16

Bousquet

  

0040

  

0025

  

CL 3718585

  

Active

   1978-05-10    2015-04-23    16

Bousquet

  

0036

  

0024

  

CL 3718591

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0036

  

0025

  

CL 3718592

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0036

  

0026

  

CL 3718593

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0036

  

0027

  

CL 3718594

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0036

  

0028

  

CL 3718595

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0037

  

0024

  

CL 3718601

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0037

  

0025

  

CL 3718602

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0037

  

0026

  

CL 3718603

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0037

  

0027

  

CL 3718604

  

Active

   1978-05-10    2015-04-21    16

 

 

Section 4.0    October 2013    4-6


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

Township

  

Row

  

Column

  

Title

  

Status

  

Date of
registration

  

Expiry Date

  

Surface
Area (ha)

Bousquet

  

0037

  

0028

  

CL 3718605

  

Active

   1978-05-10    2015-04-21    16

Bousquet

  

0040

  

0018

  

CL 4271441

  

Active

   1984-03-08    2015-02-20    7

Bousquet

  

0016

  

0000

  

CLD P360010

  

Active

   1968-09-26    2013-09-25    17.9

 

*

Suspended: are for claims included in mining lease 1002 awaiting to be removed from the register

**

Suspended: are for claims affected by mining lease 1002 awaiting to have their surface area reduced accordingly

In 2008 and 2009, two (2) surface leases (822126, 822198) were surveyed to define areas for the Westwood exploration shaft site, the Warrenmac ramp and other Westwood surface infrastructure such as a ventilation raise and service buildings (See Figure 4.3). Note that these leases are not included in Table 4-1. The surface lease 822198 is now included entirely in the Westwood mining lease B.M. 1002, while a part of surface lease 822126 is still outside the B.M. 1002 (a part of the access road between the Doyon mine and the Westwood project).

On April 16, 2010 an application was filed with the MRNF to request an additional mining lease for the Westwood project development and referred as B.M. 1002. The Westwood mining lease was granted on April 23, 2012, for a total of 196.2 Ha. It covers the lots 4301148, 4399767, 4606905, 4606906, 4606907 and 4606971 of the Quebec Cadastre, as well as a non-registered land in the river bed of the Bousquet River, in the township of Bousquet, Registration Division of Rouyn-Noranda (see Figure 4.3). This mining lease is valid for a period of 20 years, until April 23, 2032.

 

4.4

Legal Surveys

The original Doyon property boundary was surveyed by J.-P. Deslauriers, A.G., in April 1978. This survey covers the south-eastern part of the actual Doyon property starting from the western border of mining lease 0695 (Figure 4.3) to the eastern limit of the claims.

The legal survey for the Westwood project mining lease B.M. 1002 was performed in 2010 by J.-L. Corriveau, A.G. This mining lease is included inside the Doyon (Westwood) property (Figure 4.3)

Others surveys were conducted over different blocks inside and around the Doyon (Westwood) property including: 1979 (J.-P. Deslauriers, A.G. – Mouska area), 1982-83 (J.-L. Corriveau, A.G. – around BM 0695), 1990 (J.-L. Corriveau, A.G. – Mouska and West areas) and 1992 (J.-L.Corriveau, A.G. – Tailing ponds areas). Maps are available in the Westwood project office.

 

 

Section 4.0    October 2013    4-7


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

4.5

Requirements to Maintain the Claims in Good Standing

Fees for mining leases and tailing surface leases are due at the MRNF yearly at their dates of anniversary which are spread from April to July. A mining lease is initially valid for 20 years and may be extended for additional periods of ten (10) years. The initial Doyon Mine’s B.M. 695 was extended for a second period of ten (10) years up to July 2nd, 2020, while the Westwood mining lease B.M. 1002 was granted on April 23, 2012 for a period of 20 years until April 23, 2032.

All other mineral claims are held in good standing. In Quebec, the rent of each claim depends mainly on its holding time and location. For the Doyon (Westwood) mineral claims, the average rent per mineral claim is $27 per two (2)-year period. Work requirements per mineral claim are of $1,000 in average and any excess of work credits may be applied for subsequent renewals. To accumulate credits on mineral claims, a technical report explaining exploration activities (type, time, location, costs, results, responsible persons and utilized contractors, contractor) must be filed with the MNRF as statutory works. This report should be registered within two (2) years after the expenditures have been incurred.

In the renewal process, the excess of accumulated work credits on a claim can also be applied to renew claims located in a radius of 4.5km. For the Doyon (Westwood) property, the work credits totals over $4.2 M. As long as the regulations remain unchanged, the surplus will cover existing Doyon and Mouska mines claims for a minimum of 70 years.

The global requirement for the Doyon (Westwood) property is about $120,500 of work credits and $3,210 of rents for every two (2) years. All claims are currently in good standing until 2013, when the standard renewal process will be continued.

 

4.6

Titles and Obligations / Agreements

The Doyon (Westwood) property is held 100% by IAMGOLD Corporation. There are no agreements, joint venture partners, or third party obligation attached to the Westwood project.

 

4.7

Exceptions to Title Opinion

The author is not aware of any exceptions to the title as described above, and did not review any documentation which would indicate anything other than clear title to the property.

 

 

Section 4.0    October 2013    4-8


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

4.8

Royalties and Other Encumbrances

In 1998, following the purchase of the 50% remaining interest of the Doyon property a participation right was granted to Barrick Gold Corporation. In August 2008, IAMGOLD acquired the Doyon/Westwood Royalty from Barrick Gold Corporation for US$13M. This acquisition allows future production from Westwood to be free from Royalty obligations.

 

4.9

Environmental Liabilities

IAMGOLD is certified ISO-14001:2004. This means that the company has implemented procedures and environmental policies that follow or are subject to all relevant Federal and Provincial Laws. From 1980 to 2009, the Doyon Mine produced 5.3 M ounces of gold from sulphide-bearing ores extracted using open-pit and underground infrastructure. Mining activity has resulted in mill tailings, sulphide-bearing mine dumps, and mine water effluent. Some of the Doyon infrastructures will be used by Westwood: the mill, the open pit for the tailings deposition and water management facilities. A rehabilitation plan was submitted to the MRNF for Doyon. It was revised in March 2010 and an updated closure plan was submitted in January 2012. The closure plan for Doyon has been approved in March 2012. Total expected closure costs are $104.7M, of which $84.7M has been earmarked for the rehabilitation of mine dumps and tailing ponds. At this time, $97.4M was given to the MRNF for financial guarantee. Rehabilitation works began in 2008 with the trucking of sulphide-bearing waste back into the inactive open-pit.

The rehabilitation plan for Westwood was submitted in March 2010. In 2012, an update of the closure costs has been sent and Westwood closure plan was approved in July 2012 by the MRNF. Total expected closure costs are $2.9M, of which $0.4M was paid to the MRNF for financial guarantee. Doyon reclaiming is not part of this budget and was not taken into account in this study.

 

4.10

Permits and Licenses

Permitting for exploration activities in Québec is associated with the claim staking process. For more advanced exploration projects (bulk sample, development work) a surface lease or mining lease is required.

It is expected that Westwood operations will continue to be within the parameters of the existing Doyon permits and approvals. As described in Chapter 20, project development carried out in accordance with the requirements of Directive 019 (version March 2012) on the mining industry of the Québec Ministry of Sustainable Development, Environment and Parks (MDDEP). This directive is commonly used tool for the analysis of mining projects requiring the issuance of a certificate of authorization under the EQA. The final effluent is also under the federal regulations according to the Metal Mining Effluent Regulations

 

 

Section 4.0    October 2013    4-9


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

For the Westwood project, all necessary permits were obtained for infrastructure construction, including the access road, woodcutting, electric power line, communication line and water line. All are located inside the mining lease and the existing surface leases. Certificates of authorization were obtained for the following activities: Warrenmac ramp, exploration shaft, ventilation raises, waste pad and water pound, ore extraction, sceptic installation, well for potable water and use of the former Doyon open pit for the storage of Westwood tailings.

 

4.11

Other Significant Factors and Risks

The author did not review any significant factors and/or risks that may affect access, title, or the right or ability to perform work on the property.

 

 

Section 4.0    October 2013    4-10


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

5.

ACCESSIBILITY, CLIMATE, LOCAL RESOURCES’ INFRASTRUDCTURE AND PHYSIOGRAPHY

 

5.1

Topography and Elevation

The Westwood project is located in glaciated terrain, underlain by volcanic rocks. The topography is relatively flat (less than 35 metres differential elevation) and at about 340 m above the sea level. Overburden varies from 0 to 35 metres thick. Even with good drainage (multiple permanent and intermittent creeks), the clayey soil can be water-logged during the summer season.

 

5.2

Vegetation

Spruce, pine, fir, larch, poplar, birch and cedars are the main varieties of the mature forest covering the Westwood area. In November 2008, the required permits were secured and woodcutting was completed over the Westwood surface lease area. As the project is close to a National Park, local wild animals are observed on the property from time to time.

 

5.3

Accessibility

The property is located on Arthur Doyon Road, 4 km east from the intersection of Mont-Brun Road and Arthur Doyon Road. There are presently two routes leading to this intersection:

 

   

From the south, the intersection is accessible via the paved Provincial road no. 117 which connects Rouyn-Noranda and Val-d’Or then 1 km towards North via the secondary paved road leading to Mont-Brun and Aiguebelle National Park (Mont-Brun Road) ;

 

   

From the north, the intersection is accessible via the Mont-Brun Road, which connects the paved Provincial road no. 117 and the paved Regional road no. 101 though the municipalities of Mont-Brun, Cléricy and D’Alembert.

A number of roads were developed on the property to access the Westwood Shaft site and other infrastructure. Surface infrastructure is described in Chapter 18.

 

5.4

Climate and Operating Seasons

The regional climate varies from dry-hot (up to 35°C) in summer time (end of June to September) to cold with snowfalls (down to -40°C) in winter (end of December to March). There is no rainy season but in the summer muddy trail conditions can slow surface exploration activities, as there is a need to avoid releasing suspended materials into the streams (environmental condition). However, access is available year-round. Climatic conditions have little effect on mine operations, although heating may be required in winter to keep ventilation infrastructure and ore bins free of ice.

 

 

Section 5.0    October 2013    5-1


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

5.5

Local Resources and Infrastructure

The 120 km separating Rouyn-Noranda from Val-d’Or is scattered with producing and past-producing mining projects such as: Mouska, Doyon, Bousquet 1, Bousquet 2, Dumagami, Laronde-Penna, Lapa, Osisko and Goldex. The local workforce is recognized as skilled and experienced mine workers (miners and staff) and many suppliers are in the area. The Westwood project will be very attractive to potential employees due to its potential longevity, its accessible location and the competitive working conditions offered by IAMGOLD.

As described in Section 4.5 of this report, the excess of accumulated work credits for the Doyon (Westwood) property will cover existing Doyon and Mouska mines claims for a minimum of 100 years. The current surface rights available around the Westwood Project infrastructure (claims for Doyon and Mouska Mines) are sufficient for future mining operations, including potential tailings storage areas and potential waste disposal areas. An application for a certificate of authorization to use the former Doyon open pit as a tailings storage area was made to the MRNF in 2011. The certificate of authorization was granted on March 7, 2012.

Reliable communications, fast network links and water supply facilities are readily available at the Doyon Mine Site. These were extended to the Westwood project in 2008. 25 KV power lines were also built to supply the Westwood exploration shaft and the ventilation raise.

The nearest active railway line is located less than 10 km south of the project. The nearest active airport is the Rouyn-Noranda airport located less than 25 km east of the project.

 

 

Section 5.0    October 2013    5-2


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

6

HISTORY

The first exploration activities reported on the Doyon (Westwood) property date as far back as 1910. Towards the 1930’s and 1940’s, development works (shallow exploration shafts and drifts) were instigated by the Mooshla G.M. Company over the Mooshla-A and Mooshla-B occurrences both located in the western part of the Doyon (Westwood) property (Production of Mooshla-A : 4,444 tonnes at 27.0 g/t Au). Simultaneously (1938), O’Leary Malartic G.M. Ltd was working on the Westwood occurrence in the eastern part of the Doyon (Westwood) property (surface works, shallow shaft and drifts).

The Doyon site was the subject of more intense prospecting in the 1960’s by the prospector Arthur Doyon. In 1972, it became the co-property of Silverstack Mines Company Ltd and of SOQUEM, which carried out exploration works between 1972 and 1975. In 1977, Long Lac Mineral Exploration Ltd (Lac Minerals Ltd) took over Silverstack Mines Ltd, and a drilling survey of 120 holes brought the Doyon deposit into production in February 1980. In 1983, a surface exploration campaign led to the discovery of Doyon West Zones.

Through the years, exploration efforts were mainly concentrated on the Doyon Mine. In 1986 Cambior took over SOQUEM’s mine assets, including 50% of the Doyon Mine. Exploration programs were then conducted on Doyon from underground and on the Warrenmac-Westwood areas from surface. The Warrenmac sulphide-lens was delimited at that time. In 1989, Doyon essentially became an underground mining operation. In 1994, Barrick Gold Corp. took over Lac Minerals Ltd assets and acquired its 50% interest in the Doyon mine. In January 1998, Cambior acquired Barrick’s 50% interest to become the sole owner. From 1986 to 2001 (Cambior, Lac Minerals and Barrick Gold), a total of 128 holes were drilled from the surface on the Warrenmac-Westwood occurrences. These drill holes were located South and East of the Doyon open pit on both eastern and western sides of the Bousquet Fault.

In 2002, Cambior’s Exploration team initiated geological compilation that led to target the favourable Bousquet Formation at depth where good alteration patterns were recognized. The first drilling phase from surface (2002) led to the Westwood and North Corridor mineralisation discovery at depth, on the eastern side of the Bousquet Fault. A five-year exploration program followed, targeting the favourable Warrenmac-Westwood corridor at depth. In the original scheme, project expenses for the entire program (Westwood and Mooshla) totalled $11.3 M to realize 50,000 metres of drilling and 2.6 kilometres of drift development excluding follow-up.

 

 

Section 6.0    October 2013    6-1


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

Finally, in November 2006, IAMGOLD Corporation took over Cambior Inc. and acquired all of its assets including the Doyon mine and Westwood project.

 

6.1

Ownership

Since 1978 ownership changes resulted from privatization, take over or acquisition (described above). During this time the mining concession and property borders remain approximately the same, modification being limited to within the property limits when additional blocks were surveyed for tailings disposal (claims transformation). IAMGOLD Corporation has held 100% of property interest since November 2006.

 

6.2

Project Expenditures

Table summarizes previous exploration activities from 1938 to 2004 for the Westwood area. Exploration expenditures prior to Cambior’s 2002 involvement have not been taken into account, however they left $4.4M of unused exploration credits on claims.

Table 6-1 : Previous (1938-2004) Exploration Drilling – Westwood

 

Previous Exploration Drilling Warrenmac – Westwood Area

Year

   Surface/Underground
Exploration
   Area    Total
holes
     Total
meters
     Dimension

1938

   Shaft    WW         76.2 m      

1938-95

   From surface and
underground
   WW

Cadillac Group
North Zone

    

 

 

47 holes

2 holes

5 holes

  

  

  

    

 

 

23 604 m

252 m

1 290 m

  

  

  

  

1995

   Surface    Schiste / WW      6 holes         6 430 m       BQ/NQ

1996

   Surface    Warrenmac      10 holes         3 283 m       BQ/NQ

1999

   Surface    Schiste / WW      2 holes         864 m       BQ/NQ

2001

   Surface    Schiste / WW      7 holes         5 661 m       BQ/NQ

2002

   Surface
Underground
   Schiste / WW
Schiste / WW
    

 

6 holes

2 holes

  

  

    
 
5 855 m
1 989 m
  
  
   AQ/BQ/NQ
NQ

2003

   Underground    10-2/J-125      2 holes         2 707 m       NQ

2004

   Underground    14-01/J-125/WW      6 holes         5 240 m       NQ/BQ
        

 

 

    

 

 

    

TOTAL

           95 HOLES         57 251m      
        

 

 

    

 

 

    

The Table summarizes recent (2004 – December 31st 2012) exploration activities and investments for the Westwood area.

 

 

Section 6.0    October 2013    6-2


IAMGOLD Corporation

Westwood Project

   NI-43-101 Technical Report

 

 

Table 6-2 : Recent (2004-2012) Exploration Works – Westwood Project

 

Year

   Drifting
(m)
     Surface drilling
(holes/ wedges)
     Surface drilling
(m)
     Underground
drilling
(holes / wedges)
   Underground
drilling
(m)
     Costs before tax
credits (C$)
(x000$)
 

Total 2004

    

 

Lateral

752

 

  

    
 
Exploration
1 h / 5 w
  
  
     4 233       Exploration
2 h
     3 064         3,050   

Total 2005

    

 

Lateral

910

  

  

    
 
Exploration
7 h
  
  
     6 303       Exploration
9 h
     9 727         3,451   

Total 2006

    

 

Lateral

976

  

  

    
 
Exploration
0 h
  
  
     —         Exploration
22 h
     16 972         4,438   

Total 2007

    

 

Lateral

915

  

  

    
 
Exploration
3 h / 2 w
  
  
     1 712       Exploration
26 h
     26 038         6,522   

2008

    

 

Lateral

1 815

  

  

    

 

Valuation

16 h

  

  

     5 655       Valuation

91 h

     22 443         29,450   
    

 

Vertical

—  

  

  

    
 
Exploration
46 h / 15 w
  
  
     17 513       Exploration
19 h / 22 w
     23 191      
     Raise         Engineering         1 248       Engineering      1 396      
     21         4 h          5 h / 4 w      

Total 2008

     1 836         66 h / 15 w         24 416       115 h / 26 w      47 030         29,450   

2009

     Lateral         Valuation         9 491       Valuation      34 504         104,856   
     3 680         24 h / 8 w          168 h / 2 w      
     Vertical         Exploration         9 112       Exploration      28 400      
     416         12 h / 2 w          24 h / 18 w      
     Shaft/Raise         Engineering         —         Engineering      3 173      
     1 117         0 h          15 h      

Total 2009

     5 213         36 h / 10 w         18 603       207 h / 20 w      66 077         104,856   

2010

    

 

Lateral

5 953

  

  

    

 

Valuation

0 h

  

  

     —         Valuation
236 h
     44 367         108,373   
     Vertical         Exploration         —         Exploration      29 863      
     708         0 h          28 h / 15 w      
     Shaft/Raise         Engineering         —         Engineering      1 187      
     1 228         0 h          11 h      

Total 2010

     7 889         —           —         275 h / 15 w      75 417         108,373   

2011

    

 

Lateral

8 497

  

  

    

 

Valuation

0 h

  

  

     —         Valuation
209 h
     45 928         132,795   
     Vertical         Exploration         —         Exploration      27 763      
     1 143         0 h          25 h / 10 w      
     Shaft/Raise         Engineering         165       Engineering      519      
     526         1 h          13 h      

Total 2011

     10 166         —           —         135 h / 7 w      74 210         132,795   

2012

     Lateral         Valuation         —         Valuation      45 686         214,186   
     12 289         0 h          333 h      
     Vertical         Exploration         —         Exploration      36 792      
     2 037         0 h          59 h / 6 w      
     Shaft/Raise         Engineering         —         Engineering      1 816      
     473         0 h          14 h      

Total 2012

     14 799         —           —         406 h / 6 w      84 294         214,186   

Total

    

 

Lateral

35 787

  

  

    
 
Valuation
40 h / 8 w
  
  
     15 146       1037 h / 2 w      192 928         607,12   
    

 

Vertical

4 304

  

  

    
 
Exploration
69 h / 24 w
  
  
     38 873       214 h / 71 w      201 810      
    

 

Shaft/Raise

3 365

  

  

    
 
Engineering
5 h
  
  
     1 413       58 h / 4 w      8 091      

Grand-Total 2004-2012

     43 456         113 h / 32 w         55 432       1309 h /77 w      402 829         607,121   

 

 

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6.3

Doyon Historical Mineral Resource and Mineral Reserve Estimates

The Doyon Mine, adjacent to Westwood project, does not constitute the main object of this report. Historical reserves stated in this section, related to Doyon, are listed for information purposes only, do not necessarily conform to CIM definitions, and therefore are not NI 43-101 compliant. The historical reserves quoted in this section relate to historical underground mining activity on the Doyon Mine and refer to Doyon Annual Reserves Report. A description of Proven and Probable reserves is not provided in this document. They are not included in the discussion of current resources in Chapter 14 and reserves in Chapter 15 of this report.

The Doyon mine ceased production in December 2009 after almost 29 years of operation. Figure shows cumulative production and reserves. As shown in Table , a total of 31,568,610 tonnes have been extracted from the Doyon Mine for a production of 5,300,000 ounces at an average recovery rate of 94.9%.

Figure 6.1 : Cumulative Production and Reserves at Doyon Mine

 

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Table 6-3 : Historical Production at Doyon Mine

DOYON MINE HISTORICAL PRODUCTION

 

     Open Pit Mining      Underground Mining      Low Grade      TOTAL  
     Tonnage      Grade      Tonnage      Grade      Tonnage      Grade      Tonnage      Grade         
Year    (m.t.)      (gr Au/m.t.)      (m.t.)      (gr Au/m.t.)      (m.t.)      (gr Au/m.t.)      (m.t.)      (gr Au/m.t.)      Onces  

1980

     685 745         4.30                     685 745         4.30         70 124   

1981

     781 841         5.20                     781 841         5.20         109 104   

1982

     1 228 370         4.90                     1 228 370         4.90         152 221   

1983

     1 322 538         4.90                     1 322 538         4.90         177 250   

1984

     1 086 580         5.40         12 001         8.80               1 098 581         5.44         187 222   

1985

     1 140 424         4.90         17 289         12.70               1 157 713         5.02         170 188   

1986

     1 276 508         4.80         90 344         15.10               1 366 852         5.48         212 912   

1987

     1 028 404         5.20         232 674         11.80               1 261 078         6.42         248 848   

1988

     954 356         5.20         491 823         8.80               1 446 179         6.42         279 981   

1989

     59 961         7.10         787 760         8.30         253 744         2.50         1 101 465         6.90         234 693   

1990

           832 552         9.00         189 216         2.50         1 021 768         7.80         243 452   

1991

           999 244         8.00         139 717         2.60         1 138 961         7.34         257 271   

1992

           1 064 908         7.50         90 657         2.60         1 155 565         7.12         252 112   

1993

           1 102 983         7.20         21 631         2.60         1 124 614         7.11         252 317   

1994

           1 019 835         7.20         119 025         1.60         1 138 860         6.61         233 862   

1995

           1 164 601         6.20         30 482         1.40         1 195 083         6.08         219 346   

1996

     121 625         6.40         965 992         6.10         59 150         1.20         1 146 767         5.88         209 578   

1997

     56 577         3.60         934 125         5.10         243 079         1.20         1 233 781         4.26         162 673   

1998

           1 167 091         5.30         63 528         1.00         1 230 619         5.08         192 636   

1999

     23 874         3.40         1 071 474         5.70         172 797         1.00         1 268 145         5.02         195 982   

2000

     35 080         4.40         1 125 482         5.00         34 065         1.00         1 194 627         4.87         186 422   

2001

           1 083 347         5.50         161 180         1.00         1 244 527         4.92         188 289   

2002

           1 152 142         4.60         34 462         1.00         1 186 604         4.50         163 599   

2003

           1 008 251         5.00         155 608         1.00         1 163 859         4.47         160 211   

2004

     167 201         1.60         930 365         4.40         40 653         1.00         1 138 219         3.87         136 076   

2005

           659 083         4.90         33 190         1.00         692 273         4.71         102 194   

2006

     86 877         1.40         593 216         4.90         59 402         1.00         739 495         4.18         95 416   

2007

           515 939         5.10               515 939         5.10         82 359   

2008

           328 836         6.65         536         1.00         329 372         6.64         67 400   

2009

           259 170         6.50               259 170         6.50         52 331   

Total

     10 055 961         4.92         19 610 527         6.27         1 902 122         1.64         31 568 610         5.56         5 296 069   

The Doyon shaft is still in operation. It was closed from August 2011 to May 2012 for major repairs but has been is in operation since mid-May 2012. The Westwood project connects to the Doyon Shaft at Level 084. The Doyon shaft will be used to support the Westwood project development by expediting material and equipment delivery and permitting extraction waste rock until its closure, currently scheduled for 2014.

 

6.4

Westwood Mineral Resource and Reserve Evolution

The first resource estimation for the Westwood project was performed by the IAMGOLD Exploration Division based in Val-d’Or, QC in the first semester of 2007 (IAMGOLD Corporation, August 2007). This triggered a Scoping Study in order to evaluate the economic potential of the project (IAMGOLD Corporation, August 2007).

 

 

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Other resource estimates were performed in July 2008 (IAMGOLD Corporation, February 27th 2009), in June 2009 (IAMGOLD Corporation, December 2009), in October 2010 (IAMGOLD Corporation, April 1st 2011), in May 2011 (IAMGOLD Corporation – March 5 2012) and in May 2012 (internal revision, non-published report) based on additional drilling information.

In September 2012, a seventh resources and reserves estimate was prepared by the Author based on additional drilling information. This estimate is well described in Chapters 14 and 15 of this report.

All the Westwood project mineral resource and reserve estimates provided in this technical report were prepared by the IAMGOLD personnel and conform to CIM definitions, and therefore are NI 43-101 compliant. They are included in the discussion of current resources in Chapter 14 and reserves in Chapter 15 of this report as an evolution of the Westwood mineral resource and reserve since the initial resource estimation prepared in 2007.

 

 

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7

GEOLOGICAL SETTINGS AND MINERALISATION

 

7.1

Regional Geology

The Westwood project is part of the Doyon-Bousquet-Laronde (DBL) mining camp (Figure 7.1) which is located within the Southern Volcanic Zone of the Abitibi sub-province. The deposit is hosted within Archean volcanic and intrusive rocks of the Bousquet Formation (2699-2696 Ma) which is one of the youngest assemblage of the Blake River Group (BRG: 2704-2694 Ma). The DBL mining camp hosts several world class deposits (the Doyon, the Bousquet 2—Dumagami and Laronde-Penna mines). It is by far the largest gold-copper-zinc-silver producing district in Quebec Province with a total production, current resources and reserves record of more than 145 Mt averaging 5.5 g/t Au for more than 25.5 Moz.

Five deposit and occurrence styles are recognized in this camp: 1) gold-rich base metal massive sulphide lenses, 2) gold-rich vein stockworks and sulphide disseminations (Au±Cu-Zn), 3) intrusion-related Au-Cu-sulphide-rich veins, 4) shear-hosted Au-Cu-sulphide-rich veins and 5) syn-deformation auriferous quartz-pyrite-tourmaline veins. After 30 years of exploration and mining activity, two mines are still in operation in the immediate area of the project (Mouska and Laronde-Penna). Recent scientific works (Mercier-Langevin et al., 2009) have confirmed geochemical similarities between the host rocks of the main sulphide lenses at the Laronde-Penna mine and the rocks hosting the Warrenmac-Westwood mineralised corridor at Westwood. Consequently, there is excellent potential for gold-rich VMS mineralisation to occur on the property. Moreover, the Zone 2 Extension veins at Westwood are localized at the same stratigraphic level than the Doyon Main Zone #2 veins.

 

7.2

Local and Property Geology

The Westwood project is located within the limits of the Doyon property (Figure ) which covers the Blake River Group (BRG) metavolcanic rocks and a part of the metasedimentary Cadillac (CG) and Kewagama Groups which are localized respectively to the south and north of the BRG. The BRG in this area is limited to a highly strained relatively thin band of metavolcanic and intrusive rocks that forms a steeply dipping (70-80°), southward-facing homoclinal sequence. The stratigraphy generally strikes east-west (N100-110°).

The Mooshla intrusion, a polyphased synvolcanic pluton, is comagmatic with the Bousquet Formation and intrudes the volcanic rocks in the western part of the property (Galley and Lafrance, 2007).

 

 

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Excluding the West Zone, which is hosted within the Mooshla intrusion, most of the former Doyon mine production comes from the felsic volcanic rocks (Main Zone #2), the mafic to intermediate volcanic rocks (Central Zone) and the sericitic shear zone (Zone #1). Gold bearing VMS lenses and disseminated sulphide zones occurring in the eastern part of the Doyon property are known as the Warrenmac and Westwood showings, respectively to the west and to the east of the NE-SW trending Bousquet Fault (BF).

Figure 7.1 : Regional/local geology – Westwood project location (plan & composite longitudinal views)

 

LOGO

The deformation is heterogeneous and varies in intensity from moderate to strong throughout the DBL mining camp. The regional foliation is east-west with dips varying from sub-vertical to 70° towards the south. The stratigraphic units and most of the mineralised zones are strongly transposed in the regional foliation. The regional metamorphism grade is transitional from upper greenschist to lower amphibolite facies.

 

 

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  7.2.1

Lithology and Stratigraphy

The volcanic stratigraphic column was originally divided into six units by Savoie et al. (1991). Subsequent reviews by Lafrance et al. (2003) and Mercier-Langevin et al. (2009) subdivided the units into distinguishable members based on textural and/or geochemical parameters (Figure ). From north to south (base to top of the stratigraphic column) these units are:

Unit #1 (Hébécourt Formation): This unit consists of tholeiitic basalts with pillowed, brecciated and massive flow textures with local glomeroporphyritic horizons. Numerous gabbroic sills and rare narrow argillic beds are also noted.

In the DBL, the Hébécourt Formation, which represents the base of the Blake River Group throughout the BRG, is overlain by the Bousquet Formation which is subdivided as follows:

Lower member: Tholeiitic to transitional affinity (2698 Ma).

Units #2.0: Overlying and intercalated with the Hébécourt Formation, unit #2 is mainly composed of tholeiitic quartz- and feldspar-phyric felsic rocks of intrusive origin (but initially interpreted as tuff). The Bousquet 1—Zone 6 is located in this unit.

Units #3.1 – 3.2 – 3.3: These complex units correspond to tholeiitic to transitional and mafic to felsic volcanic rocks displaying tuffaceous, breccia and flow textures and are interpreted as submarine high density flow deposits (Mercier-Langevin et al., 2008). East of the Bousquet Fault, the southern (upper) contact is not obvious with overlying units as unit #3 is in contact with similar rock types of unit #4.4. Unit #3 hosts parts of the Doyon—Main Zone (Zone 2).

Units #4.1 – 4.2 – 4.3: These units represent tuffs, breccias and flow textured rocks. Units #4.1 and #4.2 have a tholeiitic to transitional affinity and felsic to intermediate composition whereas unit #4.3 is transitional in affinity and dacitic to rhyolitic in composition. Units #4.2 and #4.3 host most of the Doyon—Main Zone (Zone 2) and parts of Westwood project’s Zone 2 Extension mineralised corridor. Part of the #4.3 unit is affected by an E-W shear zone which pinches at depth and eastward from the Doyon mine area. This shear zone (hosting the Doyon—Zone 1) deforms several rock types (units #4.2, 4.3 and the base of 4.4) and it is described herein as the sericitic schist.

Units #4.4: This heterogeneous unit presenting a transitional affinity is essentially composed of mafic to intermediate tuffs, volcanic breccias and lavas. This unit hosts the Bousquet 1—Zones 4 and 5 as well as the Westwood project’s North Corridor and a part of the Zone 2 Extension corridor.

 

 

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Units #4.5: Overlying the unit #4.4, we have the unit #4.5 which has a transitional affinity and is essentially composed of dacitic to rhyolitic tuff and flows with local feldspar crystals. This unit hosts the Westwood project’s Warrenmac-Westwood corridor.

Figure 7.2: Doyon-Bousquet-Laronde regional stratigraphy (from Mercier-Langevin et al. 2009)

 

LOGO

Upper member: Transitional to calc-alkaline affinity (2698-2696 Ma).

Units #5.1 – 5.2 – 5.3: Mainly composed of dacitic to rhyolitic lapilli to blocky tuffs with common feldspar porphyry and, in unit #5.3, blue quartz phenocrysts. These units, that have a transitional to calc-alkaline affinity, host Bousquet 1—Zones 1, 2 and 3, all Bousquet 2—Dumagami zones and Laronde-Penna Zones 7, 6, 20N and 20S.

 

 

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Unit #5.4: This andesitic to basaltic and transitional to tholeiitic unit could be of volcanic or intrusive origin. Initially encountered only on Laronde and Bousquet properties, it is now also recognised on the Doyon property. Its distribution in the hanging wall of the Warrenmac-Westwood corridor is variable. At Laronde, this unit seems to be spatially related to the Zone 20N and 20S.

The Blake River Group is, to the south, in stratigraphic or structural contact with the Cadillac Group meta-turbidites.

Mooshla Intrusion: In the western part of the property, units #3.1 – 3.2 – 3.3 and #4.2 – 4.3 are intruded by the polyphased synvolcanic Mooshla intrusion. The intrusive dioritic phase (northern part) hosts the Mouska—Main Zone while the upper tonalite/alaskite phase to the south hosts the Doyon—West Zone. The Mooshla intrusion will not be further discussed in this report.

Figure shows a geological plan view of the Westwood project while Figure shows a South-North cross-sectional interpretation of the Westwood deposit.

Figure 7.3: Geological Map – Plan view of Level 084

 

LOGO

 

 

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Figure 7.4: South-North cross-sectional interpretation of the Westwood deposit

 

LOGO

 

 

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  7.2.2

Structural Geology

All lithologies of the DBL mining camp have been affected by a north-south compression event, which resulted in a sub-vertical to steeply south dipping east-west schistosity. High-strain anastomosing east-west corridors are observed throughout the property. Outside of these narrow corridors, primary volcanic textures are typically well preserved.

A dominant east-west deformation zone presents on the Doyon property is marked by a sericitic schist, with highly deformed rocks occupying a true width of up to 150 metres. The deformation affects completely or partially felsic (#4.2-#4.3) and mafic (#4.4) units. The schist dips at about 65º towards the south. The intensity of deformation and associated sericitization appear to reduce with depth. East of the Bousquet Fault, deformation and alteration seem to decrease and to disappear 250 metres east of the fault.

Late conjugate brittle faults (NE-SW and NW-SE) and joints occur throughout the Doyon property. The most significant ones are the Doyon Fault (NE-SW orientation and ±50°SE dip) and the Bousquet Fault (NE-SE orientation and ±80°SE dip). The latter shows an apparent sinistral displacement of about 300 metres that affects Warrenmac-Westwood’s mineralised zones. The vertical movement related to this fault is not well-documented but seems negligible based on field observations.

 

  7.2.3

Alteration

The Westwood area covers three pervasively altered, east-west trending mineralised corridors that are stacked from north to south and located midway between the Doyon and Bousquet 1 deposits. A recent study (Wright-Holfeld et al., 2010) reveals that those three corridors share some similarities with each other in terms of alteration assemblages. The alteration minerals described in the Westwood deposit area are the result of an upper greenschist / lower amphibolite facies metamorphism of previous synvolcanic alterations.

Zone 2 Extension footwall and hanging wall proximal alteration is composed of a quartz-pyrite-sericite-plagioclase assemblage who is overprinting a chlorite-biotite-muscovite±garnet background assemblage. North Corridor footwall shows a quartz-sericite-chlorite±garnet with little biotite-calcite distal alteration assemblage while the hanging wall presents a quartz-muscovite-biotite-chlorite±garnet distal alteration assemblage, both overprinted by a proximal sericite-quartz-pyrite alteration assemblage. The footwall of the Warrenmac-Westwood corridor is marked by a distal quartz-muscovite-calcite-garnet alteration with addition of plagioclase and titanite in the hanging wall which is overprinted by a proximal quartz-sericite-pyrite alteration assemblage. An aluminous alteration assemblage composed of Zn-rich staurolite,

 

 

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kyanite and andalusite with quartz, sericite and pyrite is replacing the typical alteration assemblages cited above at depth (> 2km) and to the east of the Bousquet Fault within the Warrenmac-Westwood corridor This alteration assemblage is similar to the one found at depth in the Laronde Penna deposit and in the Bousquet 1 deposit. Multiple geochemical samples were collected during the drilling campaigns but final interpretation has not yet been completed.

 

7.3

Mineralisation

Mineralisation observed in the camp is mainly associated with units #4.2, #4.3, #4.4, #5.1, and #5.2 of the Bousquet Formation. These units host gold-rich VMS-type semi-massive to massive mineralisation such as the Bousquet 1, Bousquet 2 and Laronde deposits and the Warrenmac-Westwood corridor and gold-sulphide vein-type mineralisation such as Zones 1 and 2 at Doyon and Zone 2 Extension at Westwood.

Excluding the Doyon Mine area, mineralisation in the Westwood deposit consists of multiple horizons grouped in three distinct mineralised corridors from North to south (Wright-Holfed et al., 2010; Mercier-Langevin et al., 2009): the Zones 2 Extension corridor, the North Corridor and the Warrenmac-Westwood Corridor. Gold is generally associated with the presence of base metal sulphides in each corridor.

The Zone 2 Extension mineralisation consists of quartz-pyrite veins and veinlets with variable but usually minor amounts of chalcopyrite and sphalerite. They are generally less than 15 centimetres thick and are hosted in sericitized wall rock containing 2 to 10% disseminated pyrite. The vein system is roughly oriented N85-105° with a dip varying between 60-70°S and is slightly discordant to the regional foliation and S0 planes (direction and dip). Free gold, at the origin of high-grade values, is frequently observed in those veins which are located within the respectively felsic and mafic volcanic units #4.3 and #4.4. The veins are highly strained and associated with a proximal sericite-pyrite-quartz-±garnet alteration assemblage. Analogies with the Doyon Mine’s intrusion-related Zone 2 may reflect a similar origin.

The mineralisation setting of Zone 2 was exposed in late 2008 over a distance of 225 metres and showed better continuity than expected (Figure ). Mapping confirmed that the mineralisation is slightly oblique in both strike and dip relative to the stratigraphy. The mineralisation distribution and/or ore shoot patterns remains partly misunderstood since visible gold-rich accumulations were intersected immediately adjacent to low-grade gold values in drill holes. Our knowledge of the mineralisation distribution and orientation will continue to increase with further data acquisition, additional underground development and studies in progress.

 

 

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Figure 7.5: Zone 2 Extension corridor block-test mining of the Z230 Vein

 

LOGO

The North Corridor mineralisation is characterized by quartz-pyrite veins and/or concentrations with locally abundant sphalerite-chalcopyrite±pyrrhotite when approaching the Warrenmac-Westwood Corridor. The amount of sulphide is variable within centimetre- to decimetre-wide veins and veinlets. The system is generally parallel to the Zone 2 Extension corridor with a dip ranging from 70-80°S and is also weakly discordant from the regional foliation. Occasional free gold is also present in the veins. Mafic to intermediate volcanic rocks (unit #4.4) host the North Corridor. Some veins share some analogies with the Zone 2 Extension corridor veins while others are comparable to Warrenmac-Westwood veins, suggesting different, multiple or hybrid origins.

The Warrenmac-Westwood corridor consists of auriferous semimassive to massive sulphide lenses, veins and disseminations containing variable but significant amounts of Cu, Zn and Ag (Mercier-Langevin et al, 2009). The mineralisation is characterized by pyrite – sphalerite – chalcopyrite – pyrrhotite veins, stringers and massive sulphides associated with variable amount of quartz and rare visible gold and galena. The sulphides are also enriched in the epithermal suite of elements (e.g. As, Sb, Bi, Pb, Se, Te, and Hg). These ore zones are a few centimetres to more than 50 centimetres thick in a disseminated

 

 

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pyrite- and sericite-rich altered halo reaching thicknesses of up to 10 metres. Local massive to semimassive sulphide lenses ranging from 1 to 14 metres are also observed within the corridor (Figure ). This corridor is thought to be a gold-rich volcanogenic massive sulphide horizon. The system is generally parallel to the Zone 2 Extension and North Corridor with dip ranging from 70-80°S, also weakly discordant to the regional foliation.

Figure 7.6: Warrenmac banded massive sulphide lens

 

LOGO

Gold distribution is variable throughout the Warrenmac-Westwood corridor, however significant association with sphalerite and/or chalcopyrite is frequently observed. The zinc and copper distribution remains misunderstood. High content in zinc is observed to the west of the Bousquet Fault whereas to the east of the fault the upper levels are generally richer in zinc while the copper content increases at depth. Occasional syn-deformation and spatially related to the ore horizons black quartz veins with chalcopyrite traces return gold values, but not systematically (Figure 7.6) along both sides of the massive sulphide lens).

The Warrenmac-Westwood corridor is located at the same stratigraphic level, in the lower part of the upper member of the Bousquet Formation, on each side of the Bousquet Fault. As mentioned before, this post main deformation event late fault affects the mineralisation with a sinisterly apparent movement.

 

 

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The Federal Government (Geological Survey of Canada) is in the final stages of an important multidisciplinary study (e.g. oxygen isotopes, sulphur isotopes, U-Pb geochronology, etc.) that aims to better understand the geological and metallogenic evolution of the DBL camp. Their goal is to determine whether these ore zones represent a transitional system and metallogenic link between the syn-magmatic Au-Cu veins of the Doyon deposit to the west, and the volcanogenic sulphide veins, stockwerks, lenses and disseminations of the Bousquet 1, Bousquet 2—Dumagami and Laronde-Penna deposits to the east. Moreover, a Ph.D. student is currently working at the deposit scale to better define the volcanic architecture of the Westwood deposit area. The study’s goals are to create a genetic model of formation for the Westwood deposit and to understand the spatial distribution of the different mineralised corridors.

 

7.4

Geochemistry

Geochemical data interpretation is underway. The main alteration styles are listed in Section 0. Regional data ratios established in the 2000’s are still very helpful to discriminate lithology alteration trends and plunges as well as favourable stratigraphic corridors and metallic associations. The database was recently updated and studies are still ongoing.

 

7.5

Geophysics

The Westwood area has been surveyed with most of the traditional geophysical prospecting methods including ground magnetic, aeromagnetic, VLF, Induced Polarization (IP) and pulse-EM in drill holes. Compilation maps were produced and are available on site.

In the last five years, the INFINITEM-method was used in selected deep holes to help locate major conductors within the favourable volcanic sequence. These holes are starting from 900 metres below surface to a 2km depth and required huge loops to induce a sufficient electromagnetic field to detect conductors. Some weak in-hole and off-hole anomalies were detected and can be explained by pyrite concentrations and veins within known mineralised corridors.

In 2008, an INFINITEM test-survey was conducted in 3 short holes crossing and adjacent to the Warrenmac lens. The test was inconclusive due to the pyrite type encountered and the high sphalerite content.

After the survey of the Warrenmac lens we can conclude that because of the weak sulphides conductivity and the high operating costs, the application of this method is inadequate for the investigation at depth.

 

 

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8

DEPOSIT TYPES

 

8.1

Deposit Types

The origin of the gold in the Doyon-Bousquet-Laronde (DBL) mining camp has been extensively debated in the past and three models have been proposed: synvolcanic, multi-stage, and syn-deformation. Recent and current studies of the Laronde-Penna deposit, Westwood ore zones, and Mooshla intrusion mineralisation, combined with the geological synthesis of the DBL mining camp (Mercier-Langevin et al., 2009), have provided further insights into the synvolcanic model for the introduction of the gold.

Five deposit and occurrence styles are recognized in this camp: 1) gold-rich base metal massive sulphide lenses (Laronde-Penna, Bousquet 2-Dumagami and Warrenmac lens), 2) gold-rich vein stockworks and sulphide disseminations (Bousquet 1, Westwood and Ellison);, 3) intrusion-related Au-Cu sulphide-rich vein systems (Doyon, Mooshla-A), 4) shear-hosted Au-Cu-sulphide-rich veins (Mouska and MicMac) and 5) syn-deformation auriferous quartz-pyrite-tourmaline veins (Mooshla-B)

On the Westwood project, Zone 2 Extension mineralisation share similarities with the Doyon mine intrusion-related veins system while the Warrenmac-Westwood Corridor may be related with the volcanogenic massive sulphide lenses of the Laronde-Penna and Bousquet 2-Dumagami mines. The North Corridor mineralisation shows hybrid characteristics between the two previous corridors.

 

8.2

Investigation Concept

All mineralised structures of the Westwood project are generally parallel in all three (3) mineralised corridors at N85-105° / 60-80°S which is slightly discordant to the regional stratigraphy and foliation in direction and dip (±15°). For now, known mineralised zones are hosted in units 4.2, 4.4 and 5.1. Generally the holes are planned and drilled according to the localization of the drilling bays with azimuths ranging from 45-90° from the mineralised structures and the dips usually range between +45 and –65º. Plunges of the mineralisation are also considered to determine the targets. Recent exploration South to North drill holes are drilled from the southern bays of the 084 level with dips reaching -85° since mid-2010 to target the deepest extensions of the mineralised zones. Since the end of 2011, North to South exploration and valuation drill holes are also drilled from level 104 (1040 metres deep), level 132 (1320 metres deep) and level 140 (1400 metres deep) with dips ranging between +45 and –45º to delineate the existing known mineralised lenses and to target unexplored areas located West, East and under the actual mineralised zones.

 

 

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A main regional structure, the Bousquet Fault, affects the lithologies and mineralisation of the Westwood project. The fault crosses the targeted area following a ±NE direction and dipping steeply to the SE at ±80°. That fault shows a sinistral apparent displacement of about 300 metres. Vertical movement is not well-documented until now but seems negligible based on field observations. Movements due to the fault have to be considered during the planning but since the mineralised corridors parallels roughly some well-defined and easy to follow lithologies, it becomes relatively easy to target the corridors on both sides of the Bousquet Fault.

Gold distribution is variable throughout the three (3) mineralised corridors (Zone 2 Extension, North Corridor and Warrenmac-Westwood) since visible gold is frequently present in those three zones. Furthermore, significant gold values associated with sphalerite and/or chalcopyrite are also observed. The exploration and valuation drilling programs are thus based on identification and delimitation of the sulphur-bearing structures as well as the gold-bearing vein structures.

There is excellent potential for gold-rich VMS mineralisation to occur on the property. Recent scientific works (Mercier-Langevin et al., 2009) have confirmed geochemical similarities between the host rocks of the main sulphide lenses at the Laronde-Penna mine and the rocks hosting the Warrenmac-Westwood mineralised corridor at Westwood; Particularly unit 5.2, now recognized on the property (Figure ), which hosts the Laronde’s 20 North lens. Therefore some holes drilled from North to South are selected to cover at a regular spacing (±200m) all the sequence up to the sediments as some significant ore zones have been discovered higher in the stratigraphy at the Laronde-Penna deposit.

 

 

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9

EXPLORATION

Most of the exploration works performed on the Westwood project since the 1930’s come from diamond drilling programs (see Chapter 6 for the exploration history and ownership). Through the years, major exploration efforts were concentrated on the Doyon Mine site but since 2002, the focus has turned to the gold-rich VMS potential of the Blake River Group, especially in the Warrenmac-Westwood area. The stratigraphy in the area is well defined (Bousquet Formation) and host-rocks are comparable to the ones hosting gold and VMS mineralisation at the Bousquet 2-Dumagami and Laronde-Penna mines located a few kilometres East of the Westwood project.

Since 2002, surface infrastructures and underground development have carried on to support exploration diamond drilling works. Highlights of activities completed or still in progress are:

 

   

Development of 2.89 km of exploration drift towards East (Westwood occurrence) starting from level 14 of Doyon mine, now named Westwood main drift, level 084 (840m below ground surface);

 

   

Some Pulse-EM and INFINITEM geophysical surveys conducted in selected holes;

 

   

An increased power capacity to feed seven underground drills;

 

   

Development of an second exploration drift started from the Westwood main drift (level 084) to reach the southern part of the project, crossing the three Corridors and the Bousquet Fault, and permitting better access for drilling;

 

   

Sinking of an exploration shaft started in 2008 which reached 1931m below the surface at the end of December 2012;

 

   

Sinking of the Warrenmac ramp between 2008 and 2010 from the surface to level 036 (360m below ground surface);

 

   

Raise boring for ventilation;

 

   

Development of the stations 036 started from Warrenmac ramp and stations 060, 084, 104, 132, 140, 156 and 180 from Westwood shaft;

 

   

Development of ramps between levels 036, 060, 084 and 104 and other access development (lateral, vertical, shaft, raise), including the Warrenmac ramp, the Westwood shaft and levels 036, 060, 084, 104, 132 and 140;

 

   

Surface building construction: head frame, production hoist, service hoist, hoist room, surface silo;

 

   

Surface infrastructures construction: mine water pond with a capacity of 7,200 m3, a waste rock dump with a capacity of 45,000 m3;

 

   

Two bulk samples on level 084 (Z230 lens) to confirm grade and mining method;

 

   

Hydrostatic plug installed on level 12 of Doyon mine to block up this portion.

 

 

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Other exploration works on the Westwood project include:

 

   

Exhaustive surface mapping of the Doyon (Westwood) property by Mr Armand Savoie, M.Sc.Geo., Geologist Responsible of Mineral Resource and Reserve in mid-1980’s;

 

   

Underground mapping of parts of Westwood exploration drifts since 2004 by the Westwood geologists and technicians;

 

   

Since 2004, geochemical samples are taken on a regular basis along drill holes to characterize alteration and rock composition. For most part of the exploration holes (large spacing) samples corresponding to a 10-20cm piece of core are taken at about every 30m mainly in units 4.2 to 5.2. Samples are sent to ALS Chemex laboratory to be analysed for whole rock and some traces elements. Over the years, a geochemical database of about 5,025 samples, has been built up and frequently used by geologists to distinguish facies and sporadically used by master’s degree and doctorate students.

 

   

In 2008-2009, surface mapping of outcrops located in the vicinities of the Warrenmac ramp portal, Westwood shaft and raise boring collars;

 

   

Stratigraphic interpretation of the Warrenmac-Westwood ore zones by Geological Survey of Canada in 2009 (Geological Survey of Canada, CR 2009-3).

 

   

A. Wright-Holfeld master’s degree, preliminary version registered in February 2011 (A. Wright-Holfeld, “The geology and geochemistry of the world-class Westwood Deposit, Abitibi Subprovince, Québec, February 2011)

 

   

Ph.D. thesis, “Géologie du gisement aurifère polymétallique Westwood, Abitibi, Québec” (preliminary title) started in summer 2010 by D. Yergeau, is underway and should be completed at the end of 2013.

 

   

In summer 2011, outcropping of the surface extension of the Warrenmac lens has been done. It corresponds essentially to the area outcropped in the early ’80. Mapping and sampling was done in summer 2012.

IAMGOLD has been the project operator from the outset. Staff are employed by IAMGOLD and report directly to IAMGOLD.

 

 

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10

DRILLING

 

10.1

Previous drilling works

Exploration and diamond drilling works began in the 1930’s and 1940’s in the Westwood areas. Table summarizes the drilling works performed on the Warrenmac and Westwood areas from the 1930’s to 2004.

Table 10-1 : Previous drilling works (1938 – 2004), Westwood

 

Previous Exploration Drilling Warrenmac – Westwood area

Year

   Surface/
Underground
Exploration
   Area    Total holes      Total
metres
     Dimension      Companies

1938

   Shaft    WW         76.2 m          O’Leary Malartic G.M. Ltd

1938-95

   From surface and
underground
   WW

Cadillac Group
North Zone

    

 

 

47 holes

2 holes

5 holes

  

  

  

    

 

 

23 604 m

252 m

1 290 m

  

  

  

      Siscoe Gold Mine (1930’s and 1940’s)

Silverstack Mines Company Ltd & SOQUEM
(1972-1977)

Long Lac Mineral Exploration Ltd &
SOQUEM (1977-1986)

Long Lac Mineral Exploration Ltd & Combior
(1986-1994)

Combior & Barrick Gold Corp. (1994-1995)

1995

   Surface    Schiste / WW      6 holes         6 430 m         BQ/NQ       Combior & Barrick Gold Corp.

1996

   Surface    Warrenmac      10 holes         3 283 m         BQ/NQ       Combior & Barrick Gold Corp.

1999

   Surface    Schiste / WW      2 holes         864 m         BQ/NQ       Combior

2001

   Surface    Schiste / WW      7 holes         5 661 m         BQ/NQ       Combior

2002

   Surface
Underground
   Schiste / WW
Schiste / WW
    

 

6 holes

2 holes

  

  

    
 
5 855 m
1 989 m
  
  
    
 
AQ/BQ/NQ
NQ
  
  
   Combior

2003

   Underground    10-2/J-125      2 holes         2 707 m         NQ       Combior

2004

   Underground    10-01/J-125/WW      6 holes         5 240 m         NQ/BQ       Combior
        

 

 

    

 

 

       

TOTAL

           95 HOLES         57 251 m         
        

 

 

    

 

 

       

 

10.2

Recent and Current Drilling Programs

An aggressive underground exploration program which initially included 2.6 kilometres of drift development towards East from the Doyon mine was initiated by Cambior in 2004 and remains in progress. The program objectives are to explore the favourable stratigraphy at depth on both sides of the Bousquet Fault. To date, all underground drill holes on the Westwood occurrence have been performed by Orbit Garant Drilling.

By the end of 2007, the underground electrical capacity, of the level 084, was increased to support more equipment. Current power installation is sufficient to feed eight drills. In 2008, nine electric drills (6 from underground and 3 from surface) were running simultaneously most of the time on the project. In 2009, exploration and valuation drilling carried on with eleven electric drills (8 from underground and 3 from surface). Since 2010, drilling all categories has been exclusively done from underground development with nine to eleven electric drills. Underground drilling was performed from levels 036, 060, 084, 104, 132 and 140 and from Warrenmac ramp.

 

 

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Two sizes of diamond drill core, NQ and BQ, are used on the project. The NQ is the size usually used for all types of drilling. It helps to have a better control of the deviation, to enhance the recovery in strongly sheared or fractured rock, to pass through major faults and to increase the quantity of material assayed per sample considering a free gold environment.

When the maximum depth penetration is reached for the NQ-size, drillers reduce to BQ-size. To date, exploration holes length varies from 800 metres to 2.2 kilometres. In 2008, Orbit-Garant built an innovative rig capable of achieving 2.5 km depth penetration. Since then a second one has been built. Two drills of that capacity are currently active underground.

The deviation is often difficult to control depending on the relation (direction/dip) between holes and the regional foliation. At sharp angles, holes tend to lift while at more open angles, the tendency is to deepen. In the case of deep holes, wedges (conventional and retractable) are often used to reach upper targets because it is easier to control the deviation. It is also the best way to duplicate intersections obtained from the parent hole.

Control drilling has also been tested in 2010 in one hole to reach a precise target at ±50 metres. Tech Directional Services was the contractor chose to perform the test. The “Devico” technique used has permitted a stronger deviation in a desire direction using sophisticated technology. The result has been partially positive since a good deviation was obtained but the test stopped due to the ground difficulties.

All exploration and valuation holes are surveyed, in direction and dip, at the collar and while drilling is in progress. Collar coordinates are obtained in 3D from a total station TCR-1105 (Leica) instrument after the beginning of the exploration hole or after a group of completed valuation holes. Down hole surveys are performed at nominal 50 metres down hole intervals with Reflex or Flexit tools depending on the availability of the instrument. Rare readings were taken with a Pajari tool while other surveying instruments were away for maintenance.

Overall, the core recovery is usually very good (>95%) but for the main fault zone and the sericitic schist intervals recovery may locally decrease to 50%. Even when the recovery is good, the RQD is generally poor within the main fault zone area.

There was no new geophysical survey performed in holes from 2009 to 2012 considering the results obtained in 2008, as mentioned in section 0.

 

 

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10.3

Methodology

Figure presents the workflow for diamond drilling programs. The methodology presented in the next sub-sections as well as Chapters 11 and 12 refer to this workflow.

Figure 10.1 : Workflow for diamond drilling programs

 

LOGO

 

  10.3.1

Planning

In the Westwood database, each drill hole has a unique sequential identification that is linked to the year it was drilled (e.g. R15300-12 for underground hole drilled in 2012). Exploration and valuation holes are not differentiated.

Based on the initial drilling program planned under the supervision of the Chief-Geologist, the Westwood geologists typically design drill hole directly onto the relevant vertical sections using GEMCOM GEMS. Underground drill holes are identified by the prefix “R” while surface drill holes are identified by the prefix “S”. All planned and completed drill holes are stored in a unique GEMS GEOddhWW workspace. Planned drill holes are identified by a true Boolean in GEMS’ GEOddhWW workspace (field “Planning”).

 

 

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Information such as drill hole azimuth, dip, length and special comments are noted in the appropriate areas in GEMS’ GEOddhWW workspace. Most holes are planned and drilled with azimuths perpendicular to the deposit lithology, so parallel to the project’s associated vertical sections (350 / 020º or 160 / 200º ) and the dip usually ranges between + 45 and – 65º.

Prior to drilling, a plan is printed and sent to the contractor’s supervisors and drillers. The plan shows the holes location, its azimuth, dip and planned length as well as all the controls needed during drilling. A copy of the plan is kept in the Westwood Exploration-Geology Department files.

The grid spacing for exploration drilling is 80x80 metres and larger while the spacing for valuation drilling is 10x10m to 40x40 metres.

 

  10.3.2

Drilling

The contractor sets the diamond drill onto the collar and aligns the drill with the help of the front and back sights that were fixed in the walls by the Westwood surveyors prior to drilling. All drill holes are surveyed in the first 15 metres using the single shot function of the Reflex or Flexit tools to ensure that the planned orientation and dip of the hole is respected. The hole is stopped and a new hole is collared a few centimetres away if the deviation from the planned azimuth and/or dip is too great.

All exploration and valuation holes are surveyed by the Westwood surveyors, in direction and dip, at the collar and while drilling is in progress. Collar coordinates are obtained in 3D from a total station TCR-1105 (Leica) instrument after the beginning of the exploration hole or after a group of completed valuation holes. Down hole surveys are performed by the drilling staff at nominal 50 metres intervals with Reflex or Flexit tools depending on the availability of the instrument.

Core is placed by the drillers into wooden core boxes, prior to being transported to the core shack. Core boxes are transported by piling the boxes on a flat car which is pulled by a train to the shaft station and then sent to the surface by the shaft cage and then to the core shack.

Upon completion, drill holes are identified with plastic bags containing their identification. The bags are inserted into the collar for future identification needs.

 

 

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  10.3.3

Core Logging and Sampling

At the core shack, the core is washed to remove the drilling fluids and residues. Drill holes are systemically photographed prior to logging and sampling and all pictures are stored daily on a local server.

Geotechnical logging is first carried out based on geotechnical parameters that were determined by Golder Associates Ltd. (hereafter Golder) in collaboration with the IAMGOLD Westwood geology department in order to calculate a RMR (Rock Mass Rating system) to classify the quality of rock mass. As such, the core recovery, the RQD and the breakability, hardness, alteration and schistosity intensities are recorded by the IAMGOLD geologists with an aim of optimize the comprehension of rock mass deformation. The collection of data is completed on each exploration drill hole and on a selection of valuation drill holes, particularly those in the sector of Bousquet Fault and on Z2-30 ore sill development.

The core logging is performed by the geologists to describe in details the lithology, alteration, sulphur content, texture, core recovery, structure and veining. The geologists are also responsible for the sample selection. The sample intervals are marked by the geologists and the sample tags are placed at the end of the sample interval.

The Zone 2 Extension and North Corridor mineralisation consists of quartz – sulphurs veins and veinlets generally less than 15cm wide. The Warrenmac-Westwood mineralisation consists of auriferous semimassive to massive sulphide lenses ranging from few centimetres up to 10 metres wide (true width). The sample intervals are usually 1 to 1.5 metres wide, and sometimes 0.5 metre wide to analyse separately two or more close mineralised structures.

The logging data (geotechnical and core data as well as samples ID) is recorded in an Access database (located on a local server) using a logging program developed by GEMCOM SOFTWARE INTERNATIONAL INC. and transferred daily in a SQL database (SQL server). This SQL database is also accessible by the geologists using the software GEMCOM GEMS (GEMS’ GEOddhWW workspace as discussed in section 10.3.1).

After logging is completed, the geological technicians (samplers) split the core for sampling (See Section 11.1).

 

 

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10.4

Drilling Results

The Westwood project potential remains very significant. The 2012 exploration drilling increased the information coverage over and below the level 084 (former 14th Doyon’s level) on both sides of the Bousquet Fault. The continuity and lateral extent of the known mineralised lenses were better defined. The valuation drilling program on Zone 2 Extension delineated greater mineralisation continuity than expected, although the grade distribution appears quite variable inside the lens.

Additional blocks were delineated or reinterpreted closer to surface and at depth while others were abandoned due to a lack of good grades. Some isolated intercepts continue to require follow-up. The 2012 drilling programs, from new access, increased our confidence in the mineralised zones in terms of continuity and grades. The internal 2008 scoping study was based on quality mining rather than volume; since June 2009 resources calculations have been performed over 2 metres true width using new capping and cut-off grades (see section 14.0) to reduce dilution.

Good potential exists to find more resources on both sides of the Bousquet fault especially at depth and to the west on the three mineralised corridors (Zone 2 Extension, North Corridor and Warrenmac-Westwood Corridor). On the eastern side, new mineralisation contours still require further definition and currently known zones remain open at depth.

The 2013 exploration programs will pursue at closer spacing (80 m X 80 m) for shallow depth (500m down the 084 level) and large spacing at great depth. New access will allow more valuation drilling on the three corridors for the same period. Around 88,000 metres of drilling have been planned for 2013 in all drilling categories.

Figure and Figure illustrate the new developments and new interpreted mineralised ore zones in plan view and section looking north-east respectively. Schematic longitudinal of the three mineralised corridors showing the resources blocks distribution / stacking regarding each other, are presented in Figure to Figure .

 

 

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Figure 10.2: Plan view level 084 (±20m), actual development, drill holes and mineralised zones projection

 

LOGO

 

 

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Figure 10.3: North-east inclined view showing mineralised blocks and main actual development

 

LOGO

 

 

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Figure 10.4: Composite longitudinal section A-A’ of Zone 2 Extension Corridor

 

LOGO

 

 

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Figure 10.5: Composite longitudinal section B-B’ of North corridor

 

LOGO

 

 

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Figure 10.6: Composite longitudinal section C-C’ of Warrenmac-Westwood Corridor

 

LOGO

 

 

Section 10.0    October 2013    10-11


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11

SAMPLE PREPARATION, ANALYSES AND SECURITY

Core samples are collected at the drill site and stored in closed wooden core boxes. They are delivered to the core shack facility on surface by the contractor and/or mine personnel where they are received by mine geology core shack technicians.

The mine site is monitored by close-circuit video cameras and has a security guard posted at all times at the entrance. The core shack is in an area restricted to the geology department personnel and entry is controlled via a digital key.

 

11.1

Core Shack

All core logging and sampling takes place in the core-shack and drill holes are photographed prior to sampling.

While logging, the geologist selects and indicates sample intervals by marking the beginning and end of each sample interval on the core with coloured lines/arrows. The geologist places a sample tag at the end of each sample interval that he wants to assay for gold and add indications on the tag if he requests assays for silver, copper and zinc and/or a density test. The tags used for sampling consist of a unique numbered sequence of printed paper tags. The geologist also indicates if the interval should be sawn in half in case we want to keep half the core for future reference or for acid generation and flotation tests. The rest of the core is discarded or kept for future reference depending on the density of the information required.

Following logging, technicians saw the core in half if needed and put the core and their sample tag in a plastic sample bag identified with the sample number as the sample tag. The sample bag is also colour coded to indicate the type of analysis to be done, put in a box, listed and then delivered to the laboratory along with a submittal sheet.

 

11.2

Laboratories

The assaying of the core samples are performed almost exclusively on site by the Westwood personnel. The onsite laboratory is located within the IAMGOLD’s Doyon mine – Westwood project complex and is part of the ISO14001 certification of the Doyon Mine site. All working procedures are written in detail and internal and external audits are performed regularly.

 

 

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From time to time, if the internal laboratory’s capacity is exceeded or when re-assays are required as per the QA/QC studies, samples are sent to Laboratoire Expert Inc. laboratory located in Rouyn-Noranda (40 Km east the property). The latter is certified for Gold, Silver, Copper, Zinc, Palladium and Platinum (PEA-LAM 2011).

For both laboratories, samples received are then validated against the submittal sheet so lab technicians can verify that no sample is missing. The samples are then registered and stored as soon as possible.

 

11.2.1 

On-site Laboratory

Official written procedures are made available at the on-site laboratory to ensure consistency of sample preparation and assaying techniques. All assay results are manually recorded by a laboratory technician in an Oracle database server. This database is part of the daily backup maintenance execute by the IT department.

 

1.2.1.1 

Sample Preparation

The methodology and workflow for the sample preparation presented in the next sub-sections, refers to Figure 10.1 and Figure .

Samples are first sorted based on the gold analysis method (Fire assay or Atomic absorption thereafter FA or AA) as required by the geology department and then placed in large pans and dried in an oven. Cooled samples are then submitted for gold and when indicated for base metals analyses.

The preparation technique differs lightly depending of the analytical method used. For AA, the samples are crushed with a TM Rhino jaw crusher to 75% passing 10 mesh. For FA, the samples are first crushed with a TM Rhino jaw crusher to  14 inch then crushed with a second TM Rhino jaw crusher to 90% passing 10 mesh. All crushers are cleaned with compressed air between each sample. Before each work shift, a sample is screened for percentage passing 10 mesh and results are recorded on a QA/QC worksheet.

 

 

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Both AA and FA samples are split in a Rocklabs Stand-Alone Rotating Sample Divider to produce a representative 300-400g cut of the original sample. The remaining material is placed into a paper bag (reject) and kept by the laboratory for use in the QA/QC protocol (see section 0). The divider is cleaned with compressed air between each sample.

Figure 11.1 : On-Site Laboratory Workflow for sample preparation

 

LOGO

 

 

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The 300-400g sample is pulverized using a Bico Braun UA pulverizer to 85% passing 200 mesh (pulp). The pulverizer is cleaned with synthetic olivine and then with compressed air between each sample. Before each work shift and between the different type of samples (AA and FA), a sample of waste reject is pulverized to clean the pulverizer. Also, at the end of each work shift, a composite sample of all samples analyzed during the day is collected. The composite sample is screened for percentage passing 200 mesh and results are recorded on a QA/QC worksheet.

The pulp is then homogenized before preparation of the cut material. For FA, the analysis is performed on a 30g cut. If there is free gold, two different cuts are done from two distinct pulps of 30 grams each and each cut is analyzed twice (4 FA assay results for the same sample). For AA, one cut is performed on five (5) grams of pulp material and if the results are over 1500ppb Au then the sample reject is sent back to preparation for crushing to 90% passing 10 mesh and a FA re-analysis is performed on a 30g cut. If the assay returns high grade value (over 17 g Au/t) then a gravimetric determination is performed.

When there is presence of copper and zinc sulphides, as is the case for the majority of the Warrenmac-Westwood corridor, a density test is requested on the core sample prior to analysis for base metals (Ag-Cu-Zn) and gold. For those, sample tags are marked with a red line. Since mineralisation has been observed, it corresponds usually to a gold FA request. After pulverization, two grams of material is collected and metals are analyzed with AA method. The three elements are measured on the same cut.

 

11.2.1.2 

Analysis

The gold analysis method for the intervals representing a well mineralised zone is fire assay (FA) while other intervals are analyzed with atomic absorption (AA).

Fire assay method (FA)

A 30g cut is mixed with 150g of flux and a few mg of nitrate solution. Fusion of the sample occurs in a furnace after 50 minutes at 1922oF. When cooled, the 15-40g lead sample containing the gold is separated, placed in a pre-fired cupel and positioned in the furnace at 1706oF. When the lead volatilizes, the remaining gold-silver prill (15-40g) is collected for atomic absorption finish or for gravimetric finish.

 

 

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The samples submitted to the atomic absorption finish are placed in test tubes and digested in a HNO3 solution (1.0ml). HCl (1.5ml) and distilled water (to reach a volume of 10ml) are added and silver chloride is formed. When all the silver has settled, the solution is read by atomic absorption. Pulps corresponding to samples showing high gold concentrations (higher than 17 g/t) are re-analyzed with the Fire-Assay method (gravimetry finish).

The samples submitted to the gravimetry finish are placed in a parting cup. The cup is filled with HNO3 and heated. When all the silver has settled, the gold prill is cleaned twice with hot distilled water, dried, cooled and weighed. The minimum detection limit is 0.001 mg and there is no maximum detection limit.

Atomic absorption method (AA)

The samples (5 g) submitted to the atomic absorption analytical method are placed in glass beakers and digested in an acid solution (35ml, HNO3-HCl; 1-3), then heated during 30 minutes. During heating, few drops of fluorhydric acid are added to the solution to eliminate traces of silica. Ounce heated, the solution is filtered into an Erlenmeyer flask and Methyl isobutyl ketone (MIBK, 15 ml) and distilled water (to reach a volume of 100 ml) are added. The solution is mixed during 2 minutes and is read by atomic absorption.

AA rejects corresponding to samples showing high gold concentrations (higher than 3.0g/t) are re-crushed to 90% going through a mesh #10 and re-analyzed with the Fire-Assay method (gravimetry finish).

Final grade calculation

The final grade used for resource estimation comes from FA average assays when there are both FA and AA results for a single sample and from AA average assays when there are only AA results for a single sample.

 

11.2.2

Laboratoire Expert Inc. Laboratory

Official written procedures are made available at the Lab Expert laboratory to ensure consistency of sample preparation and assaying techniques. All assay results are manually recorded by a laboratory technician in a server database. The following is an overview of their procedures.

 

 

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11.2.2.1 

Sample Preparation

Samples are first sorted in numeric order and then placed in large pans and dried in an oven. Cooled samples are then submitted for gold and when indicated for base metals analyses.

The samples are first crushed in a jaw crusher to  14 inch then crushed with a second roll crusher to 90% passing 10 mesh. All crushers are cleaned with compressed air between each sample. Before each sample batch, crushers are also cleaned with known waste material and compressed air. The first sample of each batch is screened for percentage passing 10 mesh and results are recorded on a QA/QC worksheet.

Samples are split in a Jones Divider to produce a representative 300g cut of the original sample. The remaining material is placed into a paper bag (reject) and stored for the client or sent back to the client as requested. The divider is cleaned with compressed air between each sample.

The 300g sample is pulverized using a ring pulverizer to 90% passing 200 mesh (pulp). The pulverizer is cleaned with compressed air between each sample and also with silica between each batch of samples. The first sample of each batch is screened for percentage passing 200 mesh and results are recorded on a QA/QC worksheet.

The pulp is then homogenized before preparation of the cut material. The analysis is performed on a 29.166g cut.

 

11.2.2.2 

Analysis

Samples are all analyzed using the Fire Assay method (FA). The 29.166g cut is mixed with 130g of flux and 1 mg of nitrate solution. Fusion of the sample occurs in a furnace after 45 minutes at 1800oF. When cooled, the 25-30g lead sample containing the gold is separated, placed in a pre-fired cupel and positioned in the furnace at 1600oF. When the lead volatilizes, the remaining gold-silver prill (25-30g) is collected for atomic absorption finish or for gravimetry finish.

The samples submitted to the atomic absorption finish are placed in test tubes and digested in a HNO3 solution (0.2ml). HCl (0.3ml) and distilled water (4.5ml) are added and silver chloride is formed. When all the silver has settled, the solution is read by atomic absorption. The minimum detection limit is 5 ppb and samples showing high gold concentrations (higher than 1000 ppb) are re-analyzed with gravimetry finish.

 

 

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The samples submitted to the gravimetric finish are placed in a parting cup. The cup is filled with HNO3 and heated. When all the silver has settled, the gold prill is cleaned several times with hot distilled water, dried, cooled and weighed. The minimum detection limit is 0.03 g/t and there is no maximum detection limit. All samples showing high gold concentrations (higher than 3.00 g/t) are re-analyzed with gravimetry finish before final reporting.

 

11.3

Data Verification

Quality control procedures are done at two levels, the internal laboratory quality control procedures and the geological department quality control program in order to maintain the highest possible standard controls. All the following standards statistics were compiled using ROCKLABS Reference Material Excel template available for download from their web site. Here are some of the parameters used in the template.

 

   

gross outliers (results that are >40% away from the average) are not use for statistical purpose (automatically removed);

 

   

The process limits (minimum and maximum) are set at ± 3 standard deviations (calculated from the data);

 

   

Result outside of the process limits (except the gross outliers) are verified with the Grubb’s test to see if they qualify as outliers. If so, they are manually removed;

 

   

Comments on the statistics are based on the followings Rocklabs tables :

Table 11-1 : Relative coefficient (Robust) comments

 

Gold Concentration (g/t)

   Good     Industry Typical   Poor-Improvement Needed  

0.02-0.1

     < 7   7%-9%     >9

0.1-0.2

     < 6   6%-8%     >8

0.2-0.5

     < 5   5%-7%     >7

0.5-1.0

     < 4   4%-6%     >6

>1.0

     < 3   3%-5%     >5

 

 

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Table 11-2 : Percentage of Grossly Outliers — Comments

 

Under 1%

   Good

1 - 5%

   Typical

5 - 7%

   Room for improvement

>7%

   Something is seriously wrong

 

11.3.1 

Laboratories Internal Quality Control Procedures

Both laboratories have their own written quality control procedures that are implemented at the respective laboratory. The following is an overview of each procedure.

 

11.3.1.1 

On-site Laboratory

Each batch of 24 or 29 samples includes one (1) blank sample, one (1) duplicate pulp sample and two (2) standard reference materials for gold. After the gravimetric weighting, all melting pots that contained samples with gold contents higher than 30.00 g/t are cleaned and bleached before another analysis. Also, all melting pots are identified and are always used with the same type of samples (chip sample pots for chip sample analysis, drilling sample pots for drilling sample analysis and muck sample pots for muck sample analysis) to avoid/limit the contamination effects.

Table 11-3 : Westwood on-site Laboratory – Internal Standards Statistics

(January 2010 - September  30th 2012)

 

Westwood    RockLab      Number      Outliers     Proportion      Rocklab      Lab Average      accuracy      Precision

Standard

   Number      of Result      Nb      (%)     (%)      Value (g/t)      g/t      (%)      (%)  (RSD)      Comments

Stdi_01

     0xA59         160         4         2.5        3.77         0.08         0.09         7.80         10.10       Improvement Needed *

Stdi_02

     Sn38         144         0         0.0        3.39         8.57         8.56         -0.10         1.90       Good

Stdi_03

     Sq36         326         4         1.2        7.67         30.04         29.99         -0.20         1.10       Good

Stdi_04

     Sp37         856         5         0.6        20.15         18.14         18.14         0.00         1.20       Good

Stdi_05

     Si42         445         2         0.4        10.47         1.76         1.778         1.00         2.90       Good

Stdi_06

     Se29         41         0         0.0        0.96         0.60         0.62         3.90         4.30       Industry typical

Stdi_07

     Sn50         392         2         0.5        9.23         8.69         8.65         -0.40         1.60       Good

Stdi_08

     Sj53         914         2         0.2        21.51         2.64         2.64         0.10         2.70       Good

Stdi_09

     Sg40         317         9         2.8        7.46         0.98         0.98         0.60         2.50       Good

Stdi_10

     Se44         84         2         2.4        1.98         0.61         0.61         1.30         3.50       Good

Stdi_11

     SL51         214         1         0.5        5.04         5.91         5.91         -0.10         2.50       Good

Stdi_12

     SQ48         356         9         2.5        8.38         30.25         30.16         -0.28         0.82       Good
     

 

 

    

 

 

    

 

 

   

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

Total

  

     4249         40         0.9     100.00         9.02         9.01         1.14         2.93      
     

 

 

    

 

 

    

 

 

   

 

 

    

 

 

    

 

 

    

 

 

    

 

 

    

 

*

The Rocklab values measured is very low and near the detection limit of 0.03 g/t. A small variation in the assay results has a more important impact on the accuracy and precision than on the other standards.

 

 

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The remaining material produced during the splitting process of the sample preparation is placed into a paper bag (reject) and kept by the laboratory for use in the QA/QC protocol (see section 11.3.2). All pulps are presently discarded.

 

11.3.1.2 

Lab Expert

Each batch of 28 samples includes one (1) blank sample and one (1) standard reference material for gold. Results of these tests are currently unavailable; result from our own QA/QC sample sent to Lab Expert laboratory will be available in the future.

The melting pots are used as long as the assay results are not known. For the atomic absorption process, the melting pots that contained samples with gold contents higher than 200 ppb are discarded. For the gravimetric process, the melting pots that contained samples with gold contents higher than 3.00 g/t are also discarded.

The remaining material produced during the splitting process of the sample preparation is placed into a paper bag (reject) and sent back to the client for use in the QA/QC protocol.

 

11.3.2 

Geological Department Quality Control Program

Since 2001, the Doyon mine has established an analytical quality insurance program to control and assure the analytical accuracy and precision of assays. This program, revised in June 2008 for the Westwood project (Figure 11.2), includes the systematic addition of blind samples sent to the laboratories in order to validate their accuracy and precision. Those blind samples are:

 

   

Standard reference material (SRM): (± 3 % of the samples):

SRM are used to verify the precision (standard deviation) and accuracy (difference between the average and the assigned value) of the assays. They consist of pulverized rock material in which gold content is certified by RockLab base on result from different independent labs. A SRM is inserted in the analytical sequence at every 30 samples by the geologists in charge of the core logging. Three (3) type of SRM are used (low-grade (± 2-3g/t Au), average grade (5-15g/t Au), and high-grade (> 15g/t Au).

 

 

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Blank Samples: (~1% of the total analyzed samples):

A blank is inserted in the analytical sequence after each suspected ore zone to verify the contamination of the labs mainly during the sample preparation process. A blank sample is composed of diamond drilling core of known material that has been previously assayed and was found to have a very low gold value (<0.3 g/t).

 

   

Reject Duplicates: ( >10% of the ore zones samples where gold grade is over 1g/t):

Reject duplicates are selected on a monthly basis. They are composed of the unused fraction of the pulverized rock sample left over from the assaying process which has been retagged. They are used to verify the reproducibility of the assay which is principally but not entirely link to the homogenization of the pulverized material. They are also used to see if we have an analytical skew between the results from the two laboratories. Blank samples and SRM are also included in the renumbered sequence of both laboratories.

Figure 11.2 : Workflow for geology – exploration QA/QC Program

 

LOGO

The number and types of QA/QC samples submitted to the on-site and Lab Expert laboratories between January 2006 and September 2012 for the Westwood project, are summarized in Table 11-4.

 

 

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Table 11-4 : QA/QC samples submitted to the on-site and external laboratories –

January 2006 to September 2012

 

Westwood Project

 
     Laboratories         

Sample Type

   on-site      Expert (External)      Total  

Standards (SRM)

     3 094         356         3 450   

Blanks

     1 157         364         1 521   

Reject Duplicates

     2 663         2 577         5 240   
  

 

 

    

 

 

    

 

 

 

Total

     6 914         3 297         10 211   
  

 

 

    

 

 

    

 

 

 

 

11.3.2.1 

Certified Standard Reference Material

Between 2006 and 2008 standard material (STD03), mixed from different diamond drill holes intersects on the property, was used. As seen on Table , the precision and accuracy of the results were not very good and this standard was discarded. From 2008 to September 2012, we used 13 different certified Standard Reference Materials (SRM) from Rocklabs Ltd. Several standards were created from a mix of other standards in order to have different grades. Some precision problems associated with poorly mixed standard (Std-06, Std-08) were encountered and those two have since been discontinued.

Table 11-5 : On-site Laboratory – Standards Statistics – Geology Department

 

Westwood   RockLab   Number     Proportion     Outliers     Rocklab     Lab Average     Accuracy     Precision   Use (year)

Standard

  Number   of Result     (%)     Nb     (%)     Value (g/t)     g/t     (%)     (%) (RSD)     Comments   From-To

Std03

  in-house DDH     111        3.59        1        0.9        12.11        12.81        5.78        6.4      Poor   2006-2008

Std04

  Sj39     861        27.83        7        0.8        2.64        2.65        0.20        5.4      Poor   2008-2010

Std05

  Sn38     505        16.32        3        0.6        8.57        8.25        -3.90        4.0      Industry Typical   2008-2011

Std06

  Sp37+Sn38+Sj39     187        6.04        0        0.0        15.50        16.72        7.90        5.9      Poor*   2008-2010

Std07

  Sq28     102        3.30        4        3.9        30.14        29.66        -1.70        1.4      Good   2008-2010

Std08

  Sp37+Sk43     192        6.21        1        0.5        14.60        14.72        0.80        7.1      Poor *   2009

Std09

  Sp37+Sl46     93        3.01        1        1.1        15.69        15.44        -1.60        3.3      Industry Typical   2010

Std10

  Sp37+Sl46     57        1.84        1        1.8        15.68        15.24        -2.80        4.3      Industry Typical   2011

Std11

  Sp37+5l46     118        3.81        1        0.8        15.68        15.12        -3.60        3.8      Industry Typical   2011-2012

Stdl2

  SJ53     369        11.93        3        0.8        2.64        2.53        -3.93        3.5      Industry Typical   2011- ?

Std13

  Sn50     309        9.99        1        0.3        8.69        8.32        -4.20        3.2      Industry Typical   2011- ?

Stdl4

  Sl46     43        1.39        0        0.0        5.87        5.79        -1.30        3.1      Industry Typical   2012- ?

Stdl5

  Sp37     147        4.75        0        0.0        18.14        17.71        -2.40        2.6      Industry Typical   2012- ?
   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

     

Total

    3094        100        23        0.7        12.76        12.69        -0.83        4.2       
   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

   

 

 

     

 

 

 

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A total of 3,094 samples were submitted and 23 samples did not meet the objective of ± 3 standard deviations (calculated from the data) and were rejected as outliers (0.7%). Most results obtained from 2010-2012 standards (Std05, Std09 to Std15) show precision that are “Industry typical”.

The statistics of the Internal Reference Material for 2010 to 2012 show also no evident problem of accuracy. The 2008-2009 results showed greater dispersions but this is due to the use of mixed standard materials to create new ones with intermediate gold values. Theses standard were probably not uniformly mixed and are no longer in use.

A global review of our internal procedures was started in 2010 and will be continued in 2013 to improve the QA/QC program. The 2010-2012 (Std09 to Std15) results show improvement. Precision and accuracy calculations indicate that we are within 5% of the target value. The accuracy calculation shows a bias suggesting that the internal lab under estimates the target value (conservative estimate).

An example illustrating the improved performance of the lab since the end of 2009 is the result obtained from Std04 shown in Figure .

Figure 11.3 : STD4 Control Chart

 

LOGO

 

 

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Table shows that if we use only data from 2010, the performance of the lab will be characterized as “Good” for this standard as compared to “Poor” when all data since 2008 is used.

Table 11-6 : On-site Laboratory – Standards Statistics – Geology Department Std04, 2010 only

 

Westwood    RockLab      Number      Outliers      Proportion      Rocklab      Lab Average      Accuracy      Precision  

Standard

   Number      of Result      Nb      (%)      (%)      Value (g/t)      g/t      (%)      (%) (RSD)      Comments  

Std04

     Sj39         204         4         2.0         9.64         2.64         2.65         -2.3         3.0         Good   

We plan to continue to use Rocklabs standard materials. However, the creation of intermediate value standards through mixing has ceased.

 

11.3.2.2 

Blanks

Blanks are inserted in order to check for possible contamination. During the 2006 to September 2012 period, 1157 “blank” samples were inserted in the sample sequence, usually after a promising-looking vein with or without visible gold. Samples showing visible gold are marked so the laboratory can consider an extra cleaning of their equipment after each sample. Figure summarizes the assay results for the blank samples sent to the on-site laboratory. Blanks are not barren of gold because they are part of drill holes that retuned value at or below the detection limits of our lab (0.01 g/t). In our case, the average is 0.15 g Au/t but after removing 58 outliers (6.1%) detected with the Grubbs’ test, the average is 0.09 g Au/t with a standard deviation of 0.09 g Au/t. Samples were therefore considered possibly contaminated at a returned assay of higher than 0.27 g Au/t (average + 2 Standard Deviations). A total of 139 samples returned assays higher than 0.27 g Au/t representing 12.0% of the samples submitted.

From December 2011 to August 2012, 178 samples from a Diabase Dyke were used as blank (Blank2), due to our high confidence in having a gold content well below the detection limit (post mineralisation dyke). A total of 19 samples (all outliers) returned assays higher than 0.27 g Au/t representing 10.7% of the samples submitted. These results demonstrate that minor contamination still exists in the analysis process. We are working in collaboration with our laboratory to find where those contaminations occur to fix the problem. However, in general the level of contamination is considered relatively low compared to the cut-off grade of the resources (> 6g/t) and have little or no impact on the overall estimation of the resources.

 

 

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Figure 11.4 : Assay results for blanks

 

LOGO

 

LOGO

 

 

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11.3.2.3 

Renumbered Rejects

Since 2006, 2,663 reject samples were renumbered and resubmitted to the on-site laboratory. The following scatter plots (Figures 11.5 and 11.6) shows the correlation between the original and re-assay results. Correlation coefficients R2 are respectively 0.9094 and 0.9833 while the slopes are 0.9536x and 0.9916, demonstrating improved correlation since the last reserve (May 2011). These values are considered satisfactory. The coefficient of correlation is highly affected by high gold values. Those high variations are frequently associated with visible gold veins. For this reason, samples associated with visible gold are analyzed with four (4) assays from two (2) different pulps. If the four (4) results show great discrepancy then two (2) other samples from the coarse reject are re-assayed. The final result is the average of those four (4) or six (6) results.

Figure 11.5 : Scatter Plot Original and re-assay rejects

 

LOGO

 

 

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Figure 11.6 : Scatter Plot Original and re-assay rejects—May 2011 to September 2012

 

LOGO

 

11.3.2.4 

Comparison with External Laboratory

As part of the Quality Control program, coarse reject samples from the Westwood project are sent to an external laboratory (Lab-Expert of Rouyn-Noranda). From February 2007 to September 2012, 2,557 reject samples were sent to the onsite Lab and Lab-Expert laboratories. Those re-assays are not presently used in the resource estimation (we use only the original result from the on-site lab.).

The average grade of the re-assay from the on-site laboratory was 19.38 g Au/t and 14.94 g Au/t compared with the Lab Expert average of 19.61 g Au/t and 15.09 g Au/t, which is only 1,1% lower than the on-site laboratory, with a coefficient of correlation of R2=0.9414 and 0.9603 respectively (fig. 11.7—11.8). The coefficient of correlation is affected by high gold values. The high variations observed on some samples (between 250-700g Au/t) between the two labs are generally associated with the presence of visible gold. This apparent bias has virtually no impact on the current resource estimate since the high assays are capped at lower values.

 

 

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The following scatter plots on Figure to Figure show the results for re-assays sent to both laboratories.

Figure 11.7 : Scatter Plot for Both Laboratories

 

LOGO

Figure 11.8 : Scatter Plot for Both Laboratories (Most Recent Data)

 

LOGO

 

 

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Figure 11.9 : Relative Correlation Scatter Plot

 

LOGO

Lab Expert average grade shows only a slight bias (+1%) when compared to the on-site laboratory average. Also around 70% of the results are plotting within the 20% deviation limit. Lab Expert performance is therefore considered accurate.

 

11.3.2.5 

Renumbered Pulps

For the Westwood project, 226 pulps samples have been renumbered and sent to the Lab Expert laboratory between Jan 2009 and May 2009. No pulps have been re-assayed since 2010.

The average of the re-assays was 25.38 g Au/t while the average of the original assays was 25.86 g Au/t. The coefficient of correlation is R2=0.997 and the slope is y=1.002x. The following scatter plots highlight the close correlation between the original and re-assay results.

 

 

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Figure 11.10 : Scatter Plot Original and re-assay rejects

 

LOGO

Figure 11.11 illustrates the same comparison using a logarithmic scale.

Figure 11.11 : Scatter Plot Original Log and re-assay rejects

 

LOGO

 

 

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Those data are well within the acceptable tolerance limits for the laboratory’s precision level.

 

11.3.2.6 

Reject for metals re-assays

The Quality control program also includes the selection of reject samples from the Westwood project, including the Warrenmac lens, for submission to an external laboratory (ALS Chemex in Val-d’Or) to test their base metal content. From October 2007 to May 2008, 112 coarse rejects were sent to ALS Chemex laboratory and were assayed for gold, silver, copper and zinc. The following scatter plots compare the results from both laboratories (Figure to Figure ). The average grade of the original assays for gold, copper and zinc are similar to the average assay values returned from the ALS Chemex Laboratory. A difference of 9% in the average silver grade between the two laboratories is probably due to the variable distribution of silver in the sulphide samples. No reject samples have been sent since May 2008.

Figure 11.12 : Au Scatter Plot Results of both laboratories

 

LOGO

 

 

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Figure 11.13 : Ag Scatter Plot Results of both laboratories

 

LOGO

Figure 11.14 : Cu Scatter Plot Results of both laboratories

 

LOGO

 

 

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Figure 11.15 : Zn Scatter Plot Results of both laboratories

 

LOGO

 

11.3.2.7 

Sample Preservation and Storage

In general, only portions of the exploration drill core are preserved. They correspond to all units intersected after unit 3 which are units hosting the main mineralised zones (units 4.2 to 4.5, up to the units 5.1, 5.2 and/or sediments). The drill cores are stored in core-racks on site, in a secured area. It is used for re-assays, checks, metallurgical tests or simply as “witness” samples. Note that from time to time, entire holes are saved for mechanical rock tests.

All rejects from samples collected by the geologists along the exploration and valuation drill holes are stored at the laboratory for one month, while pulps are discarded. At the end of the month, a list of the rejects held at the lab is sent to the geologist who will make sure that all rejects from significant intercepts are kept and stored in a secure place at the Westwood project site. Others rejects are discarded.

 

 

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11.4

Conclusions on Sample Preparation, Analysis and Security

The author’s opinion is that all the steps presented above are sufficient to conclude the adequacy of sample preparation, security and analytical procedures.

 

 

Section 11.0    October 2013    11-23