Exhibit 2



		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

TABLE OF CONTENTS


GLOSSARY OF TERMS			13

1.0 SUMMARY			18

2.0 INTRODUCTION AND TERMS OF REFERENCE			21

3.0 RELIANCE ON OTHER EXPERTS			22

4.0 PROPERTY DESCRIPTION AND LOCATION			23

4.1 Property Location			23

4.2 Land Area			23

4.3 Prospecting Claim Description			24

4.4 Nature of the Prospecting Licence			24

4.5 Renewal of the Prospecting Licence			24

4.6 Royalties on Production of Minerals			24

4.7 Agreements and Encumbrances			24

5.0 ACCESSIBILITY, CLIMATE, LOCAL RESOURCES, INFRASTRUCTURE AND PHYSIOGRAPHY			25

5.1 Physiography			25

5.2 Vegetation and Fauna			25

5.3 Climate			26

5.4 Local Resources and Infrastructure			27

6.0 HISTORY			29

6.1 Prior Ownership History			29

6.2 Exploration History			29
6.2.1 Mutanga Prospect Historical Exploration			30
6.2.2 Dibwe Historical Exploration			33
6.2.3 Mutanga-Dibwe Area Historical Exploration			34
6.2.4 Bungua Historical Exploration			37
6.2.5 Other Activities			38

6.3 Resource and Reserve History			38

6.4 Production History			40

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


7.0 GEOLOGICAL SETTING			41

7.1 Regional Geology			41

7.2 Local Geology			42
7.2.1 Mutanga Deposit Geology			45
7.2.2 Dibwe Geology			50

8.0 DEPOSIT TYPES			51

9.0 MINERALISATION			52

9.1 Mineralisation and Alteration			52
9.1.1 Mutanga deposit			55

9.2 Mineralisation Styles			56
9.2.1 Disseminated U₃O₈			56
9.2.2 Fracture Hosted			58

10.0 EXPLORATION			60

10.1 Geophysical Surveys			60
10.1.1 Helicopter-borne Geophysical Survey			60
10.1.1.1 Digital Products			63
10.1.1.2 Re-flight Specifications			64
10.1.1.3 Results Of Airborne Radiometric Surveys			65

10.2 Mapping			66

11.0 DRILLING			68

11.1 Development Drilling			68

11.2 Drill Collar and Down Hole Survey Data			72

11.3 Specific Gravity			73

11.4 Down Hole Geophysical Probing			73

11.5 Drilling Quality and Geotechnical Logging			74

12.0 SAMPLING METHOD AND ANALYSIS			75

12.1 Sampling			75

12.2 Scintillometer Logging			75

12.3 Down Hole Logging			75

12.4 Diamond Core Sampling			75

12.5 RC Drill Hole Sampling			75

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


13.0 SAMPLE PREPARATION, ANALYSES AND SECURITY			76

13.1 Geological Logging			76

13.2 Sampling – Diamond Drilling			76

13.3 Sampling – RC Percussion Drilling			76

13.4 Sample Security			76

13.5 Analytical Laboratories			76

13.6 Sample Procedure and Analytical Analysis			77

13.7 Assay Standards			77

13.8 Duplicate and Repeat Sample Analysis			77

13.9 Quality Control Procedures			78
13.9.1 Field Duplicates			78
13.9.2 Field Standards			80
13.9.3 QAQC Conclusions			86

14.0 DATA VERIFICATION			87

14.1 Quality Control Procedures			87
14.1.1 Processes for Determining Uranium Content by Gamma Logging			87
14.1.2 Core Sampling, Processing and Assaying			88
14.1.3 Quality Assurance and Quality Control Measures			89

14.2 Survey Control			90

14.3 Drill Hole Location			90

14.4 Down Hole Surveys			93

14.5 Surface Topography Validation 2007			93
14.5.1 Mutanga Digital Topography Model 2007			94
14.5.2 Dibwe Digital Topography Model 2007			95

14.6 Drill hole Recovery			98

15.0 ADJACENT PROPERTIES			99

16.0 MINERAL PROCESSING AND METALLURGICAL TESTING			100

17.0 MINERAL RESOURCE ESTIMATES			101

17.1 Mineral Resource Overview and Summary			101

17.2 Input Data			103
17.2.1 Drilling Data			103
17.2.2 Topographic Data and Validation			105

17.3 Data Validation			110
17.3.1 Drill Hole Data Validations.			110
17.3.2 Gamma Data Review			112
17.3.2.1 Mutanga			113
17.3.2.2 Dibwe			119
17.3.3 Gamma Data Review – Conclusions			122

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


17.4 Geological Modelling			122
17.4.1 Geological Interpretation — Mutanga Deposit			123
17.4.2 Geological Interpretation — Dibwe Deposit			126

17.5 Statistical Analysis			129
17.5.1 Historic Data Analysis			129
17.5.2 Statistical Analysis – Mutanga			131
17.5.2.1 Statistical Analysis – Drill Type			131
17.5.2.2 Mutanga Domain Statistics			133
17.5.2.3 Compositing			135
17.5.2.4 Top-Cuts			136
17.5.2.5 Mutanga Top-cut Domain Statistics			137
17.5.3 Statistical Analysis – Dibwe			141
17.5.3.1 Statistical Analysis – Drill Type			141
17.5.3.2 Compositing			144
17.5.3.3 Top-Cuts			144
17.5.3.4 Dibwe Top-cut Domain Statistics			145

17.6 In Situ Dry Bulk Density Statistics			148

17.7 Variography			150
17.7.1 Mutanga — Variography			150
17.7.2 Dibwe Mineralisation U₃O₈Variography			156

17.8 Grade Estimation			157
17.8.1 Mutanga Grade Estimation			157
17.8.1.1 Mutanga Block Model Construction			157
17.8.1.2 Mutanga Grade Estimation Parameters			158
17.8.1.3 Mutanga Model Validation			160
17.8.2 Dibwe Grade Estimation			172
17.8.2.1 Dibwe Block Model Construction			172
17.8.2.2 Dibwe Grade Estimation Parameters			173
17.8.2.3 Dibwe Model Validation			175

17.9 Mineral Resource Reporting			179
17.9.1 Classification of the Mutanga and Dibwe Mineral Resource Estimates			180
17.9.2 Mineral Resource Tabulations			182
17.9.3 Comparison to previous estimates			184

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

LIST OF FIGURES


Figure 4.1: Mutanga Project Location Plan and Geology			23
Figure 5.1: Zambia Electrical Infrastructure			28
Figure 6.1: AGIP Diamond and Wagon Drill Hole Location Map			32
Figure 6.2: Dibwe Mineralised Domains and Drill Hole Coverage			34
Figure 6.3: Dibwe – Mutanga Geological Map			35
Figure 6.4: Drill Hole Location Plan RDM Series Holes Over 2006 Helicopter-borne Geophysics			36
Figure 6.5: Bungua Area Geology and Prospect Locations			37
Figure 7.1: Mutanga Project Location and Regional Geological Setting			41
Figure 7.2: Stratigraphic Sequence of Mutanga Project (Geological Survey Lusaka Office)			42
Figure 7.4: Dibwe – Mutanga Geological Map			44
Figure 7.5: Surface Geology and Drilling Plan of Mutanga Deposit			46
Figure 7.6: Dibwe, Dibwe West and Dibwe North Surface Geology and Drill hole Plan			50
Figure 10.1: Plan Showing Area of 2008 Airborne Geophysical Survey			62
Figure 10.2: Radiometric Anomalies Identified by the OmegaCorp 2005 and Denison 2008 Airborne Radiometric Surveys			65
Figure 11.1: Mutanga Drill Hole Collar Plan – December 2008			71
Figure 11.2: Dibwe Drill Hole Collar Plan – December 2008			72
Figure 13.1: Field Duplicate Scatter Plot			79
Figure 13.2: Control Plot for Denison Field Standard UREM3/SARM23			81
Figure 13.3: Control Plot for Denison Field Standard UREM 4/SARM 24			81
Figure 13.4: Control Plot for Denison Field Standard UREM 5/SARM25			82
Figure 13.5: Control Plot for Denison Field Standard UREM 6/SARM26			82
Figure 13.6: Control Plot for all Internal Laboratory Standards			83
Figure 13.7: Control Plot for All Internal Laboratory Standard UREM3			84
Figure 13.8: Control Plot for All Internal Laboratory Standard UREM4			84
Figure 13.9: Control Plot for All Internal Laboratory Standard UREM5			85
Figure 13.10: Control Plot for All Internal Laboratory Standard UREM6			85
Figure 14.1: Distribution of Differences For Mutanga Topography DTM And Drill Holes			94
Figure 14.2: Three Dimensional View of Mutanga Drill Holes Showing Inconsistency between Topography DTM and Drill Hole Collars			95
Figure 14.3: Distribution of Differences for Dibwe Topography DTM and Drill Holes			96

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


Figure 14.4: Three Dimensional View of Dibwe Drill Holes Showing Inconsistency between Topography DTM and Drill Hole Collars			97
Figure 17.1: Mutanga Topographic DTM (Oct 2008)			106
Figure 17.2: Recent Drill Hole Collars, Coloured by RL difference			108
Figure 17.3: Mutanga Collars, Coloured by RL Difference			110
Figure 17.4: Raw Data Histogram Trace of Mutanga Assay Data (orange) and Gamma Data (blue) Populations			115
Figure 17.5: Raw Data Probability Plot of Mutanga Assay Data (orange) and Gamma Data (blue) Populations			115
Figure 17.6: Probability Plot of Mutanga Raw Assay and Gamma Data (>100ppm<500ppm)			116
Figure 17.7: Histogram Trace of Mutanga Raw Assay Data (orange) and Modified Gamma Data (blue)			118
Figure 17.8: Probability Plot of Mutanga Raw Assay Data (orange) and Modified Gamma Data (blue)			118
Figure 17.9: Histogram Trace of Dibwe Raw Assay Data (orange) and Modified Gamma Data (blue)			121
Figure 17.10: Probability Plot of Dibwe Raw Assay Data (orange) and Gamma Data (blue)			121
Figure 17.11: Mutanga Mineralised Domains and Drill Hole Coverage			124
Figure 17.12: Representative Mutanga Cross Section (NW-SE)			125
Figure 17.13: Representative Mutanga 3-D View			126
Figure 17.14: Dibwe Mineralised Domains and Drill Hole Coverage			127
Figure 17.15: Representative Mutanga Cross Section (NW-SE)			128
Figure 17.16: Dibwe 3D View of Mineralisation Surfaces			129
Figure 17.17: Mutanga Sample Interval Histogram			135
Figure 17.18: Mutanga MIN1 Domain Histogram (Composite Data)			138
Figure 17.19: Mutanga MIN2 Domain Histogram (Composite Data)			138
Figure 17.20: Mutanga MIN2HG Domain Histogram (Composite Data)			139
Figure 17.21: Mutanga MIN3 Domain Histogram (Composite Data)			139
Figure 17.22: Mutanga MIN4 Domain Histogram (Composite Data)			140
Figure 17.23: Mutanga MIN5 Domain Histogram (Composite Data)			140
Figure 17.24: Dibwe SE Domain Histogram (Composite Data)			147
Figure 17.25: Dibwe Central Domain Histogram (Composite Data)			147
Figure 17.26: Dibwe NW Domain Histogram (Composite Data)			148
Figure 17.27: Bulk Density Data Distribution			150
Figure 17.28: Close Spaced Drilling used for Geostatistical Analysis			152

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


Figure 17.29: Close Spaced Drilling, Down Hole Variogram			153
Figure 17.30: Close Spaced Drilling, Direction 1 Variogram			154
Figure 17.31: Close Spaced Drilling, Direction 2 Variogram			154
Figure 17.32: Close Spaced Drilling, Direction 3 Variogram			155
Figure 17.33: Swath Plots MIN1			162
Figure 17.34: Swath Plots MIN2			163
Figure 17.35: Swath Plots MIN2HG			164
Figure 17.36: Swath Plots MIN3			165
Figure 17.37: Swath Plots MIN4			166
Figure 17.38: Swath Plots MIN5			167
Figure 17.39: NW-SE Cross Section Through MIN1			168
Figure 17.40: NW-SE Cross Section Through MIN2			169
Figure 17.41: NW-SE Cross Section Through MIN2HG,			169
Figure 17.42: NW-SE Cross Section Through MIN3			170
Figure 17.43: NW-SE Cross Section Through MIN4 (top) and MIN5 (bottom)			170
Figure 17.44: Swath Plots, All Domains			176
Figure 17.45: NW-SE Cross Section Through the CENTRAL and SE Domains,			177
Figure 17.46: NW-SE Cross Section Through the CENTRAL and SE Domains,			178
Figure 17.47: NW-SE Cross Section Through the SE, CENTRAL and NW Domains			178
Figure 17.48: Mutanga Resource Model Coloured by Resource Class			181
Figure 17.49: Mutanga Block Model, Coloured by U₃O₈ ppm			183
Figure 17.50: Dibwe Block Model, Coloured by U₃O₈ ppm			183

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

LIST OF TABLES


Table 1.1: Mutanga Resource Estimate (December 2008)			20
Table 6.1: Previous Mutanga Mineral Resource Estimates			39
Table 10.1: 2008 Airborne Geophysical Survey Boundary Coordinates			61
Table 10.2: 2008 Airborne Geophysical Survey Specifications			63
Table 10.3: Re-Flight Specifications			64
Table 10.4: Anomalies Identified by 2005 OmegaCorp Airborne Radiometric Program			66
Table 11.1: Denison Development Drilling Statistics			69
Table 11.2: Denison Exploration Drilling Statistics			69
Table 11.3: Summary of 2008 Exploration Drilling Program			70
Table 13.1: QAQC Sample Breakdown			78
Table 13.2: List of Field Standards with Expected Values and Action Limits			80
Table 13.3: List of laboratory Standards with Expected Values and Action Limits			83
Table 14.1: Drilling Campaigns at Mutanga and Dibwe (2005)			91
Table 14.2: Proportion of Holes Located on the Ground			92
Table 17.1: Mutanga and Dibwe Summary of August 2006 Mineral Resource Estimate			101
Table 17.2: Mutanga Project – Summary of Current Resources as at December 2008			103
Table 17.3: Drilling Data Used in 2008 Modelling and Resource Estimations			104
Table 17.4: Recent Sample Data Used in Resource Estimation			105
Table 17.5: Average Elevation Difference of New Holes at Mutanga and Dibwe			109
Table 17.6: GPS Surveyed Holes Re-surveyed by DGPS			112
Table 17.7: Comparative Sample Statistics – Mutanga			114
Table 17.8: Mutanga Summary Statistics (Modified Data)			117
Table 17.9: Comparative Sample Statistics – Dibwe			120
Table 17.10: Summary Statistics of Each Drill Type			132
Table 17.11: Summary of Raw Data Contained Within Each Domain			133
Table 17.12: Descriptive Statistics by Drill Type – Mutanga			134
Table 17.13: Top-cut Analysis Performed for Each Domain			136
Table 17.14: Mutanga Domain Statistics (Composite Data)			137
Table 17.15: Dibwe Raw Data by Domain and Drill Type			141
Table 17.16: Descriptive Statistics by Drill Type (Raw Data) — Dibwe			143
Table 17.17: Top-Cut Analysis			144
Table 17.18: Dibwe Domain Statistics (Composite Data)			146

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


Table 17.19: Bulk Density Data			149
Table 17.20: Variography from the MIN2 and MIN3 Domains			151
Table 17.21: Details of Variography from Close Spaced Drilling			153
Table 17.22: The Results of the Cross Validation Exercise			156
Table 17.23: Mutanga Block Construction Parameters			158
Table 17.24: Grade Estimation Search Ellipse and Sample Parameters			160
Table 17.25: Comparison of Average Composite Grades with Block Model Grades			161
Table 17.26: Wireframe Volumes Compared to Domain Block Volumes			171
Table 17.27: Comparison of Mutanga OK Model and IDW2 Model			172
Table 17.28: Dibwe Block Construction Parameters			172
Table 17.29: Grade Estimation Search Ellipse and Sample Parameters			174
Table 17.30: Comparison of Average Composite Grades with Block Model Grades			175
Table 17.31: Wireframe Volume, Compared to the Block Volume			179
Table 17.32: Comparison of Mutanga OK Model and IDW2 Model			179
Table 17.33: Updated Mineral Resource Estimates for Mutanga and Dibwe (2008)			182
Table 17.34: Mutanga Project – Summary of Current Resources as at December 2008			184

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


LIST OF PLATES

Plate 7.1: Typical EGF Sequence from Bungua Prospect			45
Plate 7.2: Package A, MR09, Coarse Pyrite Nodule			47
Plate 7.3: ‘Package A’, MR09, Slump Structure in Sandstones			47
Plate 7.4: ‘Package B’, MR09, Box 7. Cross Bedding and Lamination			48
Plate 7.5: Package C, Coarse Sandstones of the EGF			49
Plate 9.1: Examples of Fault and Fracture Zones Located within the Mutanga Deposit			53
Plate 9.2: Coarse Grained for Sets Joints and Fracture			54
Plate 9.3: Localised Redox Boundaries Associated with Mud Balls and Organic Matter			54
Plate 9.4: Fractures, Iron Oxides and Clays			55
Plate 9.5: U₃O₈ as Agglomeration in Cavity (right) and Dissemination (left)			56
Plate 9.6: MR07 Mud Ball Replacement, Thin Near Horizontal Infill, Disseminations in Close Proximity			57
Plate 9.7: MR06 Un-replaced Mud Material (possibly large mud ball)			58
Plate 9.8: MR09 Coarse U₃O₈ Mineralisation within Fracture			59

LIST OF APPENDICES

Appendix 1: Examples of Core Logging Schemes and Field Sheets			201
Appendix 2: Drill Core Handling Procedure			211
Appendix 3: Down Hole Geophysics Procedure			215
Appendix 4: Gamma Probe Calibration Data (2007-2008)			218
Appendix 5: Reduced Area Boundary PL LS 237			224

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

GLOSSARY OF TERMS


$		United States Dollars.

%		Percentage.

3D		Three Dimensional.

Autunite		A uranium phosphate mineral

°C		Temperature measurement in degrees Celsius (also called Centigrade).

Ca		Calcium

AGIP		Italian Oil Company AGIP SPA.

cm		Centimetre.

Brannerite		A uranium oxide mineral.

Conglomerate		A sedimentary rock made up of various sized particles from small pebbles to large boulders cemented together.

Coffinite		A uranium silicate mineral.

Cut-off		The minimum concentration (grade) of the valuable component in a mass of rock that will produce sufficient revenue to pay for the cost of mining, processing and selling it.

CRM		Continental Resource Management Pty Ltd.

CSA		CSA Global Consulting group, CSA Global (UK) Ltd.

DD		Diamond Drilling.

Denison		Denison Mines Corp.

Dilution		Waste or non economic materials included when mining ore.

Disseminated		Minerals scattered as small particles throughout a rock.

Domain		A term used mainly in ore resource estimation or geotechnical calculations to describe regions of a geological model with similar physical or chemical characteristics.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


DTM		Digital Terrain Model.

E		Easting Coordinate.

eU₃O₈		Equivalent U₃O₈.

EGF		Escarpment Grit Formation

Fe		The chemical symbol for the element iron.

Fluvial		A geological process in, or pertaining to, rivers.

Fugro/OmniSTAR		A satellite service to give sub-metre survey accuracy.

Geostatistics		A term used meaning a mathematical statistical method based on geological spatial knowledge of grade distributions to estimate grades in a systematic way.

GSZ		Geological Survey Zambia, Department of the Ministry of Mines and Minerals Development, Zambia.

hPa		Hectopascal, measure of atmospheric pressure.

HQ		Diamond Core Diameter 63.5mm.

HQ3		Diamond Core Diameter 61mm.

IDW		Inverse Distance Weighting geostatistical estimation technique.

Karoo Supergroup		Host rocks to the Mutanga uranium mineralisation. Late Carboniferous to Jurassic rocks made up of the Upper Karoo and Lower Karoo sedimentary rocks.

K		The chemical symbol for the element potassium.

kg		Kilogram.

Kt		Thousand(s) of tonnes.

kV		Kilovolt.

lkm		Lineal Kilometre.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


Log		Natural logarithm to the base 10.

LQS		Lower Quartile Solutions.

m		Metre.

m³		Cubic metre.

Massive		A term used to describe a large occurrence of a pure mineral species, often with no structure.

Meta-autunite		A uranium phosphate mineral

Micromine		Micromine is a software tool for processing of exploration and mining data.

Mineralization		The presence of minerals of possible economic value or the description of the process by which the concentration of valuable minerals occurs.

mm		Millimetre.

MMF		Madumabisa Mudstone Formation

MN		Magnetic North.

MoMMD		Ministry of Mines and Minerals Development, Zambia.

Mt		Million tonnes.

MTI		MineTech International

N		Northing Coordinate.

NCSIR		National Council for Scientific and Industrial Research a part of the USA Ministry of Science and Technology.

Neoproterozoic		The term used in the geological time scale for the period from 545 million years ago to 1000 million years ago.

NQ		Diamond Drill Bit Size 47.6mm.

OK		Ordinary Kriging

OmegaCorp		OmegaCorp Minerals Limited is a subsidiary of OmegaCorp Limited, which was an Australian Stock Exchange listed mining company that was purchased in its entirety by Denison Mines Corp. in 2007.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


Ore		A natural aggregate of one or more minerals which, at a specified time and place, may be mined and sold at a profit or from which some part may be profitably separated.

P		The chemical symbol for the element phosphorus.

PC		Personal Computer.

PL		Prospecting license.

ppm		Parts per million (same as grams per tonne).

PQ3		Diamond Drill Bit Size 83.1mm.

QAQC		Quality Assurance Quality Control.

RC		Reverse Circulation Drilling.

Redox		Lithological or stratigraphic boundaries at which reduction and oxidation reactions have occurred.

Recovery		A measure in percentage terms in the efficiency of a process, usually metallurgical, in gathering the valuable minerals. The measure is made against the total amount of valuable mineral present in the ore.

RL		Reduced Level (same as elevation coordinate).

S		South.

Sandstone		A sedimentary rock consisting of sand size grains, generally the mineral quartz, which is in a consolidated mass.

Sb		The chemical symbol for the element antimony.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


SGS		SGS Ore Test Lakefield in Perth Australia. Inspection, verification, testing and certification company.

Silica		A compound of silicon and oxygen, generally occurring in the form of the mineral quartz.

Th		The chemical symbol for the element thorium.

TN		True North.

U		The chemical symbol for the element uranium.

U₃O₈		Uranium Oxide.

UXO		Unexploded Ordinance

V		Logarithmic Variance.

W		West.

XRF		X-Ray Fluorescence.

ZIPRA		Zimbabwe People’s Revolutionary Army.

ZESCO		ZESCO Limited, an electricity supply company in Zambia

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

1.0 SUMMARY

Prospecting Licence PL LS 237, ‘The Mutanga Project’, formerly called the Kariba Uranium Project, is located in the Siavonga District of Southern Province, Republic of Zambia, approximately 200km south of the Zambian capital city of Lusaka. The Prospecting Licence was granted by the Ministry of Mines and Minerals Development (MoMMD) to Okorusu Fluorspar Pty Ltd on 21^st October 2004. Transferral of the PL LS 237 licence to OmegaCorp Minerals Limited (OmegaCorp) was completed on 20^th December 2005. The licence was renewed on 20^th October 2006 and again on the 6^th December 2009 for a further two years. It now covers 946.3 km² (Figure 4.1)

An application to renew the licence without any reduction for an additional 12 months until October 2009 was submitted to the MoMMD on 20 July 2008. A revised renewal application offering to relinquish 50% of the lease (i.e. to retain 946.3 km²⁾ was lodged with the MoMMD on September 17, 2008.

The Prospecting Licence authorises OmegaCorp Minerals Limited to carry out prospecting activities in respect of copper, cobalt, zinc, gold nickel and uranium for a period of two years from 6 January 2009.

OmegaCorp is a wholly owned Zambian subsidiary of an Australian registered company, OmegaCorp Limited. In turn, OmegaCorp Limited is a wholly owned subsidiary of Denison, which is listed on the TSX (Toronto Stock Exchange) and the AMEX (American Stock Exchange). Denison acquired OmegaCorp Limited in August 2007.

This report outlines work completed by OmegaCorp on behalf of Denison from 2005 to August of 2008 on the Mutanga Project.

The regional geology is dominated by the Zambezi Valley which represents a rift trough and is largely comprised of the Karoo Supergroup (Late Carboniferous to Jurassic) rocks. The uranium mineralisation identified to date appears to be restricted to the Upper Karoo Escarpment Grit Formation (EGF) of the Karoo Supergroup. The EGF sequence overlays the Madumabisa Mudstone Formation (MMF), which is interpreted to have prevented uranium mineralisation from moving further down through the Lower Karoo stratigraphy.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

The largest prospects of the Mutanga project are the Mutanga, Mutanga East, Mutanga West and Dibwe deposits. These lie completely within the Prospecting Licence PL LS 237. The Bungua prospect also lies within the PL and is in an early exploration phase with continued geological mapping, sampling and further drilling to be conducted.

The Mutanga prospects have been investigated through extensive geophysical methods, mapping, exploration and resource estimation drilling. Further work is planned in 2009 to test additional radiometric anomalies identified from two airborne radiometric surveys conducted in 2006 and 2008.

The uranium mineralisation trends parallel to bedding and has a shallow dip of 10-15° towards the southeast. Bedding and mineralisation are displaced by a series of normal faults trending northeast-southwest, parallel to the axis of the valley. In some instances, for example the eastern section of the Mutanga prospect, mineralisation is associated with normal faulting to form subvertical, planar mineralised bodies.

Major controls on mineralisation in the high grade U₃O₈ areas are interpreted to be structure and large scale fracturing. As a rule, mineralisation forms as planar bodies dipping 15-20 degrees to the south east, locally overprinted by mineralisation in oxidised steep dipping fractures. Within these zones uranium mineralisation may be disseminated through the sediments, as crystalline masses in open spaces or a selvages and cores to mud balls and flakes.

The resources defined in the exploration program, geological modelling and geostatistical processing completed to date are summarised in Table 1.1 below. The resource estimate was completed by CSA Global (UK) and the report complies with the Canadian National Instrument 43-101.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


	U₃ O₈
	Lower		Measured						Indicated						Inferred
	Cut-off		Tonnes		U₃O₈		U₃O₈		Tonnes		U₃O₈		U₃O₈		Tonnes		U₃O₈		U₃O₈
Deposit	(ppm)		(Mt)		(ppm)		(Mlbs)		(Mt)		(ppm)		(Mlbs)		(Mt)		(ppm)		(Mlbs)
Mutanga		100		1.88		481		1.99		8.4		314		5.82		7.2		206		3.3
Mutanga Ext*		200														0.5		340		0.4
Mutanga East*		200														0.2		320		0.1
Mutanga West*		200														0.5		340		0.4
Dibwe		100								—		—		—		17.0		234		9.0
*Total*				*1.88*		*481*		*1.99*		*8.4*		*344*		5.82		*25.4*		*231*		*13.2*


*		Estimates for the Mutanga Extensions, Mutanga East and Mutanga West areas have not been updated since completion by CSA in 2006 and remain current.

Table 1.1: Mutanga Resource Estimate (December 2008)

The resource estimate is unchanged from the June, 2006 estimates for Mutanga East and West using a 200ppm U₃O₈ lower cut-off. Based on the results of recent mining and processing studies, the updated resource estimates for Mutanga and Dibwe are reported at a 100ppm U₃O₈ cut-off. Recent drilling at Mutanga has validated the previous historical drilling data and provided increased confidence in the U₃O₈ grade, geological interpretation and tonnage factors resulting in a significant portion of Mutanga being classified as Indicated, and a minor component of Measured Resources. The remainder of the Mineral Resource has been assigned to the Inferred category, due to the limited understanding of geological continuity, low drilling density and the uncertainty surrounding the historical radiometric methods used to determine the historical U₃O₈ grades.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

2.0 INTRODUCTION AND TERMS OF REFERENCE

The report is written to comply with the requirements of the National Instrument 43-101, “Standards of Disclosure for Mineral Properties”. It has been prepared under the supervision of and by Mr. Malcolm Titley of CSA Global on the instruction of William Kerr of Denison.

Mr Titley is the Qualified Person (QP) (as defined by the CIM Definition Standards November 22, 2005 and Section 5.1 of National Instrument 43-101 – Standards of Disclosure for Mineral Projects, Form 43-101F1 and Companion Policy 43-101CP) for the purposes of Section 19 of this Technical Report.

All historical (pre-2005) geological and sampling data provided to CSA was supplied by OmegaCorp via Continental Resource Management (CRM) in 2006. Drilling and geological data generated during the period May 2006 to December 2007 was obtained during a number of site visits to the project area by CSA. Zambia based GeoQuest Limited (GeoQuest), were responsible for the Mutanga (previously named Kariba) Uranium Project geological field activities up until the completion of recent drilling in January 2007. Denison now manages all field activities.

The resource modelling was completed under the supervision of Mr Malcolm Titley of CSA Global (UK). Specific activities completed were:

	•		Site visit and validation of data available for the resource estimates.

	•		Determination of correlation between assays and radiometrics used for U₃O₈ grade estimation.

	•		Compilation of updated Mutanga and Dibwe resource models. Classification of the resource models.

	•		Development of infill diamond and reverse circulation drill plans.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

4.0 PROPERTY DESCRIPTION AND LOCATION

4.1 Property Location

The Mutanga Project is located in the Siavonga District of the Southern Province, Republic of Zambia, approximately 200km south of the Zambian capital city of Lusaka.

4.2 Land Area

Prospecting Licence PL LS 237 covers approximately 946.3 km². See Figure 4.1. The original corner beacons of PL LS 237 were surveyed during November 2005. The physical boundaries of the Prospecting License were checked on the ground by Mr Amon Chisela, MoMMD Surveyor, during the period 14 to 19 September 2007. Cement beacons were erected, at the discretion of the Surveyor, as near as possible to each of the lease corner points “A” to “F” (Figure 4.1). An additional beacon survey was completed in 2007 subsequent to relinquishment by OmegaCorp when the license was renewed in October 2006.

Figure 4.1: Mutanga Project Location Plan and Geology

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

4.3 Prospecting Claim Description

Denison holds the Large Scale Prospecting License – PL LS 237 in the Siavonga District of Southern Province in the Republic of Zambia. This authorises Denison to carry out exploration activities for copper, cobalt, zinc, gold nickel and uranium for a period of two years from January 6 2009. The co-ordinates of the boundaries for PL LS 237 are presented in Table 4.1(a): Appendix 5.

4.4 Nature of the Prospecting Licence

The Prospecting Licence confers on its holder exclusive rights to carry on prospecting operations in the prospecting area for the mineral specified in the licence and to do all such other acts and things that are necessary and reasonably incidental to the carrying on of such operations.

4.5 Renewal of the Prospecting Licence

The current Prospecting Licence PL LS 237 expired on October 20 2008. An extension has been granted and is valid for a period of 24 months expiring January 6 2011.

4.6 Royalties on Production of Minerals

A holder of a prospecting licence is required to pay to the Republic, a royalty on the gross value of the minerals produced under the licence at the rate of three (3) per cent.

4.7 Agreements and Encumbrances

In respect of the PL LS 237 there are no current charges, liens or other encumbrances against the Company, nor are there current threatened or pending litigious claims. The above prospecting licence is further free of any other third party claims. The project area has no known environmental liabilities as it has not been subject to any mechanised mining activities.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


5.0	ACCESSIBILITY, CLIMATE, LOCAL RESOURCES, INFRASTRUCTURE AND PHYSIOGRAPHY

The Mutanga Project area is situated in the Southern Province of Zambia about 200 km south of Lusaka immediately north of Lake Kariba with the Mutanga Prospect located 31 kilometres northwest of Siavonga. The region lies approximately between 500m to 960m above sea level with Lake Kariba situated at 485m above mean sea level.

5.1 Physiography

The project area lies within the Zambezi Rift System in the southern extremities of Zambia. The Zambezi River flows to the east of the area and follows the border between Zambia, Zimbabwe and Mozambique. The topography is defined by the geology and consists of low escarpment type hills with steep and or craggy scarp slopes and gently sloping dip slopes. In general, surface runoff flows off the ridges in a parallel pattern sometimes being fault controlled but mostly contour controlled.

The Mutanga outcrop is located approximately 39km by road from Siavonga and has an elevation of 580m above mean sea level. Dibwe elevation is between 580m to 640m above mean sea level.

5.2 Vegetation and Fauna

The vegetation of the area can be classified based on topographic and climatic factors. The dominant vegetation in the area is as follows:

	•		Commiphora – Kirkia thicket on lower Karoo sands

	•		Colophospermum mopane woodland on heavy clay soils

	•		Southern Isoberlinia – Brachystegia woodland on escarpment soils

	•		Acacia woodland on clay soils

The vegetation in the area is described as stable and has had minor effects of mainly human induced disturbances. These may include frequent dry season fires, cutting of trees for poles and fuel wood, clearing for small scale agriculture, grazing and browsing and clearing woodland for settlements.

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The area where development will occur is not currently being used for other industrial activities and only small scale subsistence farming occurs in the immediate area. There are many small villages throughout the permit area, a few located around Mutanga and Dibwe. The majority of land is wild bush land and approximately 10% of the area is under agricultural use. Subsistence arable crops are grown such as maize, sorghum and bananas.

There are no permanent large mammals in the area, though it has been noted that there are potential migration routes in the area around Lake Kariba.

There are a range of small animals in the permit such as snakes (puff adders and black mambas), lizards, ants and butterflies. There is also a large occurrence of arachnids and grasshoppers. Birds are found in the permit area including guinea fowl. There have also been sightings of banded mongoose by local people.

5.3 Climate

Climatic data was sourced from the Chipepo Meteorological Station, approximately 40km NE of Mutanga and operational between 1988 and 1997. A review of information indicated that there are gaps in the data collected, as a result the average values may not be representative of the climate for each month over the combined dataset. There are no long term data available for the potential mine site.

The climate of the area is described as tropical wet and dry with distinct wet and dry seasons. The wet-hot season is from November to March, with the highest rainfall occurring in February. The mean annual rainfall is recorded as 529mm. The dry-cool season is from April until October. There is a large variation in the temporal and regional distribution of rainfall.

During the dry-cool season maximum temperatures range from 23°C to 40°C and minimum temperatures range from 6°C to 28°C. During the wet season the maximum temperatures range from 22°C to 46°C and the minimum temperatures range from 20°C to 38°C. The highest maximum temperature that has been recorded at the site was 46°C and the lowest minimum temperature that has been recorded is 6°C.

Data collected on the wind speed indicates that winds are highest in the build up to the wet-hot season where mean wind speed ranges from approximately 5 knots up to a maximum of 7 knots. There are also marked periods of very calm days during the cold dry months (April to August). The maximum wind gusts in the wet season are from storm squalls and range from 30 knots to approximately 55 knots.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

The maximum wind and barometric pressure data is from the Lusaka Airport. The mean station level barometric pressure for Mutanga is 951hPa (this pressure is based on the mean annual barometric pressure at Lusaka and is adjusted for altitude).

No interruptions to mining activities are predicted by Denison during the wet season.

5.4 Local Resources and Infrastructure

The population is sparse and limited to small family settlements. The Kariba area is populated by the so-called “Valley Tongas” of Zambia and their main language is ChiTonga, ‘the language of the Tonga’. It is spoken by approximately 1.38 million people in Zambia and is part of the Bantu family of languages.

Approximately 600 families will have to be relocated to prior to the commencement of mining activities in the area.

The main road from Lusaka to Siavonga (the nearest town to the project site) is mostly in good condition. The Mutanga deposit site itself is located west of the main road and is currently accessed via a 48km gravel track, for which a four-wheel drive vehicle is required.

The Zyiba Meenda road will be developed for the project. This road heads east from the Mutanga site and meets the sealed Siavonga road approximately 1km south of the Lusitu River and village. This track, the Zyiba Meenda village (and other areas on the lease) were battle zones between Rhodesian regular military forces and Zimbabwe People’s Revolutionary Army (ZIPRA) freedom fighters during the period 1975 to 1979. Denison has completed two phases of demining and, at the time of writing, a third phase of demining is being completed on the Zyiba Meenda road.

Utilink, a Zambian electrical power consulting firm, has been engaged to review a suitable power supply to the Project. The most probable source of power will be from the 88kV substation at Chirundu, some 60km from Mutanga. This substation is supplied via the 330kV high voltage transmission lines from the Kariba North Bank Hydroelectricity Scheme (Figure 5.1).

Knight Piesold, a hydrogeological consulting firm from South Africa, completed test work (November 2008) to identify source(s) of water for the Project in groundwater adjacent to the future operations.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

6.0 HISTORY

6.1 Prior Ownership History

Previously the license PL LS 237 was held by Okorusu Fluorspar Pty Ltd having been granted by the MoMMD on 21 October 2004 for fuel minerals, base and precious metals and industrial minerals. The license was transferred to OmegaCorp on 20 December 2005. It was renewed on 20th October 2006, for a further two years and covered 1,893 square kilometres (reduced from 2,600 square kilometres in October 2006). Denison Mines Corp. acquired OmegaCorp Limited in August 2007. Denison is an intermediate, publicly owned, uranium mining, development and exploration company listed on the Toronto (Canada) and USA Stock Exchanges. OmegaCorp Limited is a registered Australian company and a wholly owned subsidiary of Denison.

6.2 Exploration History

Uranium was first identified in the area in 1957 after a car borne survey located five anomalous areas in the vicinity of Bungua Hill, west of Siavonga. Follow up by Chartered Exploration in 1958 and 1959 found low-grade uranium mineralisation that could be followed for over 800m of strike extent. Confirmation of this uranium mineralisation was further defined in two campaigns, after regional airborne magnetic and radiometric surveys had been flown over the area by Geometrics in 1974, via ground investigation (1973 to 1977) by the Geological Survey of Zambia (GSZ) and a second campaign (1974 to 1984) by the Italian oil company AGIP SPA (AGIP).

Prior to the current work no modern exploration had taken place in the area covered by the current PL LS 237 licence for approximately 25 years. Minimal regional exploration data or material has been located during recent work and the quality of data and materials varies greatly. The data and materials located to date comprises:

•

airborne radiometric-geophysics

	•		ground radiometric survey data.

	•		regional geology maps

•

topographic maps.

•

Down hole geophysical gamma plots

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In 2006 11 diamond drill holes were drilled by OmegaCorp to twin previous drilling at the Mutanga Prospect. Results confirmed the broad tenor of the historical U₃O₈ intercepts. Work was also carried out at Bungua, at Mutanga and at Dibwe by OmegaCorp. During August to November, 2008 exploration drilling was completed by Denison at other prospects throughout the lease area.

During 2007 to 2008 Denison completed work on PL LS 237 including an appraisal of all available data (maps, plans, sections, limited geological interpretations and radiometrics and AGIP resource estimations). From this information Denison produced of several databases covering the Mutanga and other prospects.

For ease the PL LS 237 licence area will be discussed as five different areas largely on the basis of AGIP and the GSZ’s work, these are:

	•		Mutanga Prospect (Mutanga Central, Mutanga West and Mutanga East),

	•		Dibwe Prospect (Dibwe, Dibwe West and Dibwe North),

	•		Mutanga-Dibwe Area (the area of known AGIP work outside of its main ‘concentrated’ activity),

	•		Bungua Prospect (Kaumpwe West, Kaumpwe Central, Lutele and Chizwabowa),

	•		The remainder of PL LS 237.

6.2.1 Mutanga Prospect Historical Exploration

The Mutanga Prospect (Mutanga Central, Mutanga West and Mutanga East) is located approximately 31km north-west of Siavonga town and approximately 10 to 15km east of the Dibwe area see Figure 4.1. The Mutanga Prospect deposit is hosted in north-east to south-west striking braided facies units of the EGF and is thought to be fracture controlled.

Of the AGIP data (purchased by Total Zambia when AGIP pulled out of the region) of relevance to the PL LS 237 licence area, the data for the Mutanga area is the most complete and comprises, Mutanga, Mutanga West and Mutanga East, see Figure 4.1.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

Historically the Mutanga prospect appears to have been defined by:

	•		Outcropping mineralisation.

	•		Ground Radiometric Surveys

	•		Air-borne photographic and geophysical surveys.

Available data shows that AGIP carried out systematic exploration up to and including a resource estimation phase. This exploration activity included:

	•		14,794 metres of drilling (50 diamond holes for 6833 metres, 119 percussive (wagon drill) holes for 6998 metres and 83 percussive (shallow wagon drill) holes for 963 metres.

	•		Trenching.

	•		Pitting.

	•		A trial heap leach facility on site and material tested at the National Council for Scientific and Industrial Research (NCSIR) facility in Lusaka.

	•		AGIP carried out a Kriged resource estimation using internal company classification criteria, of which little are known.

Figure 6.1 shows Mutanga prospect with AGIP drill locations, note high ground-scintillometer values shown as contours on scarp edge, possibly how the prospect was initially located.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

6.2.2 Dibwe Historical Exploration

The Dibwe prospect (Dibwe, Dibwe West and Dibwe North) is located approximately 10 to 15km west of the Mutanga area; see Figure 4.1. Uraniferous mineralisation in the Dibwe area appears to be hosted by meandering facies units of the EGF.

The Dibwe area has been split into Dibwe, Dibwe West and Dibwe North, see Figure 6.2. No data has been located to date for Dibwe West and North and very little for Dibwe.

Historically the prospect appears to have been defined by:

	•		Outcropping mineralisation.

	•		Ground radiometric surveys.

	•		Air-borne photographic and geophysical surveys.

As for the Mutanga area, available data shows that AGIP carried out systematic exploration up to and including a resource estimation phase on the Dibwe project area. This work included but was not limited to:

	•		At Dibwe, 40 diamond drill holes totalling approximately 3644 metres. Additional unknown number and metreage of percussive (wagon drill).

	•		For Dibwe, resource estimation using internal company criteria of which little is known.

	•		At Dibwe West approximately 70 percussive drill holes were drilled, metreage unknown. No data has yet been identified for this drilling.

	•		At Dibwe North approximately 20 percussive drill holes were drilled, metreage unknown. No data has yet been identified for this drilling.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

Dibwe-Mutanga Corridor

Figure 6.3: Dibwe — Mutanga Geological Map

It is assumed that drilling was designed as regional traverses or single holes to test:

	•		Ground radiometric surveys.

	•		Air-borne photographic and geophysical surveys.

Drilling comprised:

	•		36 RDM diamond drill holes and 8 percussive holes (wagon drill) for over 7000 metres.

	•		Diamond holes were generally between 100 and 300 metres deep, with percussive follow up of interesting intersections.

	•		30 drill holes are reported to be mineralised with either a ‘significant’ intercept given or an ‘anomalous’ description.

	•		In the Mutanga-Dibwe Corridor 33 holes were drilled along an approximate 8km strike length.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

	•		Basic geological sections from the AGIP work indicate that the mineralisation recorded along the Mutanga-Dibwe corridor was related to oxidation/reduction boundaries within the meandering facies of the EGF along strike from the main Dibwe area.

	•		At Dibwe 11 diamond holes were drilled to test extensions to known mineralisation, nine of which were reported as mineralised.

RDM series diamond drill hole positions are shown on Figure 6.4.

Figure 6.4: Drill Hole Location Plan RDM Series Holes Over 2006 Helicopter-borne Geophysics

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6.2.4 Bungua Historical Exploration

The Bungua prospect area is located approximately 25 km west of the Siavonga and comprises a number of prospects, Kaumpwe West, Kaumpwe Central, Kaumpwe Peak, Lutele and Chizwabowa, see Figure 6.5. Uraniferous mineralisation is hosted by the EGF. The prospect appears to have been defined by:

	•		Outcropping mineralisation.

	•		Ground radiometric surveys.

	•		Air-borne photographic and geophysical surveys.

The Geological Survey of Zambia carried out exploration up to and including a resource estimation phase. This work included but was not limited to:

	•		Approximately 6000 metres of diamond and percussive drilling (approximately 67 percussive (probably wagon) drill holes and 19 diamond drill holes).

	•		Non standard estimation (Geological Survey of Zambia), which has not been reproduced in this document.

Figure 6.5: Bungua Area Geology and Prospect Locations

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6.2.5 Other Activities

As a step towards nuclear fuel/energy production, the National Council for Scientific and Industrial Research (NCSIR), a part of the USA Ministry of Science and Technology, built an industrial scale trial pilot plant at its Lusaka facility. This facility was designed and constructed to test ‘ores’ from various sites in Zambia. Material from the Siavonga area is believed to have been tested in the plant. Details of this work have not been found.

Based around and probably inclusive of some shallow wagon drill holes are 22 0.75 – 1.0 metre pits at the Mutanga Prospect. It is thought that material was taken from these pits to a test heap leach at the Mutanga site and possibly to the NCSIR industrial test site in Lusaka.

6.3 Resource and Reserve History

Numerous resource estimates have been prepared, using a variety of companies, consultants and methodologies. All estimates compare favourably and demonstrate similar U₃O₈ grades and tonnages. This indicates that the resource estimate is robust. See Table 6.1.

During the 1970’s AGIP reported a polygonal estimate for the Mutanga deposit at a number of U₃O₈ cut-off’s. In October 2005 CRM estimated an Inferred Mineral Resource for Mutanga, generated by creating an ore block model within a wireframe. Blocks of 5m x 5m x 1m were created and a global in-situ dry density of 2.2 used to convert volume to tonnes. A lower cut-off of 200ppm was applied to the model. The CRM Mineral Resource estimate was used for public reports.

In April 2005, after receipt of the OmegaCorp MR diamond drilling data (twinned holes), CRM updated the resource model and Mineral Resource Estimate for Mutanga. In November 2005 project drilling and resource investigations were conducted for OmegaCorp. CRM undertook an appraisal of the AGIP data using modern standards and modelled the Mutanga Prospect according to JORC Code and guidelines. In November 2005 CRM produced an Inferred Resource estimation, according to JORC guidelines, of 6.5 million tonnes at an average grade of 375ppm above a 200ppm cut-off, with an SG of 2.2.

A resource estimation was completed in 2006 (CSA) for Mutanga, Mutanga Extensions, Mutanga East, Mutanga West and Dibwe deposit areas. The resource was estimated at a 200ppm U₃O₈ lower cut-off grade and classified as Inferred due to the limited understanding of geological continuity, low drilling density and uncertainty surrounding the relationship between the different assay and radiometric methods used to determine the sample U₃O₈ grades.

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Company Name/ Year of Resource Estimate	Category	Lower Cut		Tonnes		Grade		U₃O₈
		(ppm U₃O₈)		(Mt)		(ppm U₃O₈)		(Mlbs)
AGIP (1970’s)	Inferred		700		2.4		1,000		5.3
AGIP (1970’s)	Inferred		600		3.2		870		6.1
AGIP (1970’s)	Inferred		500		4.3		740		7.0
AGIP (1970’s)	Inferred		400		4.9		600		6.5
AGIP (1970’s)	Inferred		300		7.8		530		9.1
AGIP (1970’s)	Inferred		200		9.7		480		10.3

CRM Apr 2005	Indicated		200		7		400		6.2
CRM Apr 2005	Inferred		200		0.9		400		0.8

CRM Nov 2005 Deposit	Inferred		200		6.5		375		5.4
Mutanga East	Inferred		200		0.30		400		0.29
Mutanga West	Inferred		200		0.65		350		0.53
Dibwe	Inferred		200		5.00		430		4.70

	*Total*				*12.45*		*396*		*10.92*


CSA (June 2006) Deposit
Mutanga	Inferred		200		7.0		400		6.2
Mutanga Extensions	Inferred		200		0.5		340		0.4
Mutanga East	Inferred		200		0.2		320		0.1
Mutanga West	Inferred		200		0.5		340		0.4
Dibwe	Inferred		200		8.2		370		6.6

	*Total*				*16.4*		*380*		*13.7*

Table 6.1: Previous Mutanga Mineral Resource Estimates

The June 2006 resource estimates were classified as Inferred due to consistent indications of global geological and grade continuity supported by reasonable U₃O₈ variograms. In addition to the uncertainty surrounding absolute U₃O₈ grades, this resource was not considered as Indicated category due to the low confidence in the local grade estimations, the requirement for clarification on down hole gamma logger grades, the need for increased understanding of the geological controls on mineralisation, mineralogy and specific locations of the in-situ dry density determinations.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

Estimation and classification of the Mutanga and Dibwe Mineral Resource Estimates has been completed by CSA Consultants for the Mutanga and Dibwe deposits on December 31 2007 (Table 1.1).

Subsequent to the above work, Denison Mines Corp carried out drilling in both the Mutanga and Dibwe deposits to aid in conversion of the resources from Inferred to Indicated. Details of this work are provided in Section 10 of this report.

6.4 Production History

To the knowledge of all parties, the Mutanga Project has not produced any uranium ore. No on-site evidence of production has been found.

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7.0 GEOLOGICAL SETTING

7.1 Regional Geology

On a regional scale the rocks of the Karoo Supergroup (Late carboniferous to Jurassic) occupy the rift trough of the Zambezi Valley (Figure 7.1). The rifting is understood to be associated with the break-up of Gondwanaland during the Permian, followed by opening of the proto-Indian Ocean in the Jurassic; with a final episode related to the development of the East African Rift system in late Cretaceous and early Tertiary times. The significant uranium mineralisation in the area, including that of the Mutanga Project area, occurs within the Upper Karoo sandstones of the EGF.

Figure 7.1: Mutanga Project Location and Regional Geological Setting

The stratigraphic sequence is presented in Figure 7.2. The Lower Karoo Group comprises a basal conglomerate, tillite and sandstone overlain unconformably by conglomerate, coal, sandstone, carbonaceous siltstones and mudstones (the Gwembe Formation) and finally, fine grained lacustrine sediments of the MMF. The Upper Karoo sediments unconformably overlay the Lower Karoo and comprise a series of arenaceous continental sediments overlain by mudstones capped by basalt.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

Figure 7.2: Stratigraphic Sequence of Mutanga Project (Geological Survey Lusaka Office)

7.2 Local Geology

Within the tenement area the Karoo sediments lie in a northeast trending rift valley. Locally the rift valley is hilly with large fault-bounded valleys filled with Permian, Triassic and possibly Cretaceous sediments of the Karoo Supergroup. The sediments have a shallow dip and are displaced by a series of normal faults, which in general, trend parallel to the axis of the valley (Figure 7.3). Mapping of the Mutanga-Dibwe area delineated normal faults with throws of the order of 100m at intervals of between 100 and 1,500m.

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Figure 7.4: Dibwe — Mutanga Geological Map

The uranium mineralisation identified to date appears to be restricted the EGF Figure 7.4.

The EGF sequence at the Mutanga deposit comprises at least 120m of sandstone and conglomerates with occasional mudstones and silts (Plate 7.1). The EGF overlies the MMF which comprises a grey to dark grey silty mudstone, with a dark red haematised layer representing either oxidising groundwater or a sub-aerial surface. The mudstone forms an impermeable unit and is thought to have prevented uranium mineralisation from moving further down through stratigraphy.

The contact between MMF and overlying EGF is between two and three metres above the dark red hematised layer.

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Figure 7.5: Surface Geology and Drilling Plan of Mutanga Deposit.

Three stratigraphic zones (“Packages”) have been identified from core logging and were utilised as geological boundaries during the resource evaluation phase at Mutanga. The stratigraphic sequence for these packages commences with Package A as the Basal Zone, overlain by Package B and Package C at the top. The three packages are detailed as the following:

‘Package A’ is approximately 24m thick. Overlying the MMF, a thick, dark grey mudstone coarsening upwards into pyritic, coarse grained sandstones, Plate 7.2. Small scale slump structures (Plate 7.3) and occasional possible dewatering features are observed. Occasional iron oxides are noted. ‘Package A’ is capped by an approximately 5m thick, coarse matrix- supported conglomerate. This conglomerate marks a sudden, high energy event, possibly a channel. The sequence is thought to be representative of a prograding, possibly deltaic system.

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	2.		‘Package B’, approximately 70m thick. Overlying ‘Package A’ is a sequence of repeated fining up cycles that, as a whole, coarsen upwards. Each fining up unit starts with a very coarse grained sandstone or conglomerate and fines up to a mudstone or siltstone. The units contain a variety of sedimentary structures including trough and tabular cross bedding and laminations (Plate 7.4).

			The fining up cycles are thought to be representative of a fluvial, possibly meandering system, in which mudstones were laid down in calm lacustrine, bow lake or overbank deposits. The deposits laid down in such hiatal periods could give a series of laterally continuous deposits that could be used as marker bands. Their role in mineralisation is discussed below.

			Sulphides are observed to within an approximate depth of 50m from surface. Above this depth oxidization and weathering are evidenced by reddish brown and orange iron oxides and breakdown of micaceous and feldspathic minerals. For drill hole logging purposes, the top of the EGF Package B is taken as being the first down hole presence of mudstone.

Plate 7.4: ‘Package B’, MR09, Box 7. Cross Bedding and Lamination

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‘Package C’, approximately 25m thick. Overlying ‘Package B’, is interpreted from recent drilling as the uppermost unit within the EGF in the area. ‘Package C’, although in sedimentological terms possibly related to ‘Package B’, is distinguished by grain size and structural differences. ‘Package C’ comprises bedded, generally very coarse grained sandstones with occasional conglomerates. Both sandstones and conglomerates contain less sedimentary structures than ‘Package B’ and display smaller variation in grain size with little or no cyclic variation (although individual beds can display sedimentary structures). Mudstones are generally absent, although conglomerates often contain mud balls. ‘Package C’ may represent a less ordered environment than Package ‘B’, possibly a braided channel system. Plate 7.5.

Plate 7.5: Package C, Coarse Sandstones of the EGF.

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7.2.2 Dibwe Geology

The Dibwe prospect (Dibwe, Dibwe West and Dibwe North) is located approximately 10 to 15km west of the Mutanga area; see Figure 4.1 above. Uraniferous mineralisation in the Dibwe area appears to be hosted by relatively un-faulted meandering facies units of the EGF.

The Dibwe area has been split into Dibwe, Dibwe West and Dibwe North, see Figure 7.6. No data has been located to date for Dibwe West and North and very little for Dibwe. Historically the prospect appears to have been defined by a combination of ground magnetic and airborne radiometric surveys overlain on outcropping mineralisation.

Figure 7.6: Dibwe, Dibwe West and Dibwe North Surface Geology and Drill hole Plan.

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8.0 DEPOSIT TYPES

Denison is exploring for sandstone hosted uranium deposits in the Mutanga Project area. Investigations to date suggest that these deposits are hosted within the EGF. The primary mineralisation is considered to be of the sandstone hosted fluvial channel type commonly found in the Colorado Plateau. Further detailed discussion on the mineralisation type is included in Section 9 Mineralization below and in Section 7 Geological Setting.

The exploration program going forward is aimed at improving confidence in the current Inferred Resources through targeted programs of diamond drilling in the Mutanga and Dibwe prospects. Other prospect areas will be explored by RC and diamond drilling programs to gain a broad understanding of the mineralisation styles and occurrences

Given the success of the recent helicopter-borne geophysical surveys it is planned to continue to use this exploration technique in conjunction with mapping and sampling programs to search for extensions to the known deposits.

Through this work a better understanding of the deposit type and geological model will be developed.

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9.0 MINERALISATION

It is probable that the uranium was eroded from the surrounding gneissic and plutonic basement rocks during weathering and deposition of the immature grits and sandstones. The uranium was transported together with this material in a presumably arid environment. Uranium was precipitated during reducing conditions in certain favourable units. Later fluctuations in the groundwater table caused remobilisation of this material; uranium was again dissolved and then re-deposited in reducing often clay-rich areas with a certain degree of enrichment.

Mineralisation is associated with iron-rich areas (goethite) as well as secondary uranium being distributed within mud flakes and mud balls as well in pore spaces, joints and other fractures.

The significant known uranium mineralisation within the Mutanga project occurs at various horizons within the EGF. At Dibwe it is within the upper Meandering Facies G2 unit; and at Mutanga West, Mutanga and Mutanga East it is within the lower Braided Facies G2 unit. The base of the significant mineralisation at Mutanga is about 60m above the underlying MMF. The mineralisation appears to be later than at least some of the normal faults which cut the EGF. This is evident from the good correlation of the radiometric logging data between adjacent holes within the Mutanga deposit separated by interpreted faulting.

Test work (QEMSCAN 2006) indicates that the majority of the uranium (~95%) is contained in uranium-calcite-potassium minerals such as autunite and metaautunite. Approximately 2% of the uranium bearing mineralisation by volume is attributable to brannerite and coffinite. Uranium bearing minerals exist as discrete grains; not intergrown with other minerals.

9.1 Mineralisation and Alteration

The geology of the Mutanga deposits is described in Section 7.2. Since June 2006 significant mapping has been completed in association with the recent drilling programs. The most significant geological improvement since the 2006 resource modelling, is the mapping of the near vertical fracture zones which are believed to be a major control of the distribution of mineralisation. These fracture zones are considered to be related to graben block faulting within the Karoo sandstone units. See Plate 9.1.

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The controls on mineralisation mobility are dominated by features which increase permeability including fractures (Plate 9.4), bedding, joints and cross beds (Plate 9.2). Redox boundaries i.e. lithological or stratigraphic boundaries at which reduction and oxidation reactions have occurred (Plate 9.3), mud clasts and reduced rocks are important to mineralisation precipitation. These features can be recognised in iron cemented zones, micas, iron oxide layers and mud balls.

Plate 9.2: Coarse Grained for Sets Joints and Fracture

Plate 9.3: Localised Redox Boundaries Associated with Mud Balls and Organic Matter

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Plate 9.4: Fractures, Iron Oxides and Clays

The mineralization observed comprises a variety of secondary uranium minerals. The primary mineralization is considered to have been analogous to the fluvial channel deposits of the Colorado Plateau.

9.1.1 Mutanga deposit

The Mutanga deposit is the largest of the Mutanga Project deposits. It is hosted in northeast-south west trending ridge of EGF with a northwest facing scarp. The sedimentary sequence dips generally to the southeast at approximately 20 degrees. Fracturing has been identified both in outcrop and drill core and is considered to be important as a control to the mineralising process.

The mineralisation is confined to a sandstone horizon which dips to the south at about 5 degrees. Thickness and grade mineralisation are related, the higher grades occurring in conjunction with increased thickness, in broad north-south “channels” within the sandstone unit. The stratigraphy of the unit contains conglomeratic beds. The mineralisation is described as being of three types: disseminated, fracture related and mud replacement related. The majority of the mineralisation is disseminated.

Denison’s logging of 11 MR holes identified three styles of uranium oxide mineralisation, disseminated, replacement of mud (balls and flakes) and fracture hosted material. These are discussed separately in Section 7.2, although often the differing styles were found together and may have formed synchronously.

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AGIP identified that minimal vanadium mineralisation is present in association with uranium.

9.2 Mineralisation Styles

9.2.1 Disseminated U₃O₈

Disseminated U₃O₈ mineralisation occurs in sandstones, conglomerates and within mud layers,

mud balls and mud flakes. The U₃O₈ is seen as interstitial crystals of generally fine but varying size and or amorphous material to grains. The concentration of disseminations varied from a visual below 1% to approximately 5%, Plate 9.5.

Plate 9.5: U₃O₈ as Agglomeration in Cavity (right) and Dissemination (left).

Grades vary considerably between zones of disseminations, approximately 20ppm to 2052ppm U₃O₈ (geochemical) in mineralisation thought to be solely of a disseminated nature although mud replacement material may also have been contained within core and therefore not visible during logging leading to higher values.

Lithological units containing iron-oxide and uraniferous mineralisation returned moderate to high assays, as did material containing sulphides (pyrite). Samples from MR05, MR08, MR09, MR10 and MR11 contain both sulphides and micas and disseminated U₃O₈ and were expected to return low assays.

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The presence of sulphides alongside uranium oxides may indicate a transitional zone and or preferential replacement or reduction of uranium compounds by one chemical route over another (e.g. decaying organic matter over oxidation of sulphides) as uraniferous groundwater’s moved through the lithologies.

Replacement of mud material is seen in a number of drill holes, with mud balls and mud flakes contained within conglomerates and sandstones and mud layers, although mud material is not always replaced, Plate 9.6 and Plate 9.7.

Plate 9.6: MR07 Mud Ball Replacement, Thin Near Horizontal Infill, Disseminations in Close Proximity

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Plate 9.7: MR06 Un-replaced Mud Material (possibly large mud ball).

Variation is seen in the degree of replacement, from fully replaced mud balls to mud balls with a thin rime of uranium mineralisation, or wholly un-replaced mud balls and flakes. This variance may be due to, changes in ground water chemistry, differing quantities of reducing matter within the mud, fully replaced material may have been a peat like material. It may also be due to the porosity and/or soft the mud was when affected by uraniferous ground water.

Assay from samples with mud replacement returned results over a range of approximately 461ppm to 4700ppm U₃O₈ (geochemical) although this may include some disseminated material.

9.2.2 Fracture Hosted

AGIP did not conduct angled drilling during work at Mutanga even though fractures were intersected and are shown on section. OmegaCorp and Denison have drilled angled and vertical holes. The fractures intersected in core were generally steep although (rare) shallow angled fractures were logged.

Mineralisation is seen as crystal coatings on surfaces and as concentration close to surfaces. Assays results from fractures and fractured material were as high as 2745ppm U₃O₈ (geochemical), Plate 9.8.

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10.0 EXPLORATION

Since acquiring the assets of OmegaCorp in September 2007, Denison has completed the following exploration activities:

	•		Airborne radiometric and magnetic survey,

	•		Compilation of 2005 and 2008 airborne geophysics data,

	•		Geological prospect mapping,

	•		RC and diamond drilling,

	•		Geological drill core and chip logging,

	•		Geotechnical drill core logging,

	•		Database updates and validation.

10.1 Geophysical Surveys

10.1.1 Helicopter-borne Geophysical Survey

During August/September 2008 a helicopter-borne geophysical survey was completed by Fugro, RSA, under the technical direction of Mr Don Carriere, Consultant Geophysicist (Figure 10.1).

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ARC1950 Datum, Z35S MEAN Botswana, Lesotho, Malawi, Swaziland, Zaire, Zambia, Zimbabwe					LATITUDE						LONGITUDE
#	X		Y		DD		MM		SS.s		DD		MM		SS.s
1		631749.00		8170015.00		16		33		03.44S		28		14		04.60E
2		628744.00		8170068.00		16		33		02.31S		28		12		23.22E
3		628936.00		8174985.00		16		30		22.29S		28		12		28.70E
4		640463.00		8186391.00		16		24		08.85S		28		18		54.96E
5		636295.00		8190157.00		16		22		07.18S		28		16		33.67E
6		653437.00		8200045.00		16		16		41.76S		28		26		09.01E
7		665000.00		8209950.00		16		11		16.78S		28		32		35.97E
8		687111.00		8210194.00		16		11		03.08S		28		45		00.27E
9		675000.00		8195000.00		16		19		20.61S		28		38		16.66E
10		670000.00		8189896.00		16		22		07.94S		28		35		29.56E
11		673609.00		8181223.00		16		26		49.15S		28		37		33.52E
12		662167.00		8174115.00		16		30		43.28S		28		31		09.60E
13		660838.00		8172381.00		16		31		40.02S		28		30		25.22E
14		653137.00		8170653.00		16		32		38.07S		28		26		05.91E
15		657905.00		8174880.00		16		30		19.43S		28		28		45.69E
16		662237.00		8177117.00		16		29		05.60S		28		31		11.20E
17		665046.00		8177546.00		16		28		50.95S		28		32		45.80E
18		668521.00		8181259.00		16		26		49.29S		28		34		41.99E
19		660380.00		8189352.00		16		22		28.02S		28		30		05.53E
20		670377.00		8197540.00		16		17		59.17S		28		35		40.25E
21		666759.00		8201301.00		16		15		57.72S		28		33		37.41E
22		658527.00		8197372.00		16		18		07.54S		28		29		01.11E
23		631749.00		8170015.00		16		33		03.44S		28		14		04.60E

Table 10.1: 2008 Airborne Geophysical Survey Boundary Coordinates

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2008 Airborne Geophysical Survey Specifications

Minimum Line Length		5,000 metres
Line Spacing and Trend		100 metres at 135º
Tie Line Spacing and Trend		1,000 metres at 224º
Sensor Clearance		Dependent upon culture, terrain & Aviation Safety
Magnetic		~ 15 - 25 metres
Radiometric		~ 15 - 25 metres
Survey Area Coverage		701.4km²
Line Kilometres		9,108lkm
Data to be recorded and positional data		Horizontal magnetic gradient, radiometric
Data sampling
Magnetic		~ 2.5 metres (0.05 sec)
Radiometric		~ 50 metres (1 sec)
Altimetric		~ 5 metres (0.1 sec)
GPS		~25 metres (0.5 sec)
Magnetometer		Cs vapour, 0.005 nT
Radiometric detector		Exploranium GPX 256, 1 024 in³ down
Magnetic base station		CF1 caesium vapour - 1 sec
Navigation		Novatel 3151R real-time DGPS
Altimeter Systems		MRA MK1V and GPS
Data acquisition system		FASDAS
Field processing software		Geosoft Montaj and Oasis Montaj

Table 10.2: 2008 Airborne Geophysical Survey Specifications

10.1.1.1 Digital Products

The following products (presented in ARC1950 Datum, Zone 35S MEAN Botswana, Lesotho, Malawi, Swaziland, Zaire, Zambia, Zimbabwe) were delivered to Denison at the conclusion of the airborne geophysical survey:

	•		1:25 000 Colour contour plots of the total field magnetic intensity horizontal gradient enhanced data in RTL format on CD-ROM.

	•		1:25 000 Ternary RGB plots of K, U and Th in RTL format on CD-ROM.

	•		1:25 000 Colour contour plots of the digital terrain (dependant upon area size) in RTL format on CD-ROM.

	•		1:25 000 Colour contour plots of the magnetic first vertical derivative in RTL format on CD-ROM.

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	•		1:25 000 Colour contour plots of the total magnetic intensity reduced to pole in RTL format on CD-ROM.

	•		Geosoft (32 bit) .GRD files images of:

	•		Total magnetic intensity horizontal gradient enhanced data at suitable grid cell size

	•		4 channel NASVD radiometric data at a suitable grid cell size.

	•		Digital terrain at suitable grid cell size.

	•		Geosoft .GDB or .XYZ (ASCII) files of the selected data on CD-ROM

10.1.1.2 Re-flight Specifications


Diurnal		In excess of 10nT per 10 min chord for flight lines or non-linear variations of 2nT over 2 mins or 5nT over 10 mins.

Positional		A deviation in excess of 150% or less than 50% of the nominal line spacing for a distance of 2,000m or more or any gap in excess of 175%.

Navigation		If the calculated PDOP is greater than 6 or if less than 4 satellites are useable.

Altitude		In excess of a 15% deviation for 1,000m or more — dependent upon safety.

On-line magnetic data		Noise levels in excess of the following tolerances, over 1,000m or more will result in a re-flight at The Contractor’s expense.

Total Field Intensity Data:		≥ 50pT, peak-to-peak, as determined by a normalised fourth difference.

Horizontal Gradient Data:		≥ 3pT/m, peak-to-peak, as determined by a normalised fourth difference.

Radiometric		In the event that the resolution at a Thorium peak exceeds 7% the section from the previous peak with a valid resolution to the next peak with a valid resolution will be re-flown.

Table 10.3: Re-Flight Specifications

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Prospect Name

1				Mutanga Main
2				Dibwe Main
3				Dibwe Mutanga Corridor
4				Mutanga East
5				Mutanga North
6				Shante
7				Changa
8				Mulendema
9				Dibwe North
10				Dibwe West
11				Bungua North Ridge
12				Mbendele
13				Kanyama Series
14				Lufua
15				Chibote
16				Bungua
17				Zyiba Meenda
18				Kanyanga
19				Mutanga West

Table 10.4: Anomalies Identified by 2005 OmegaCorp Airborne Radiometric Program

Exploration drilling of these prospects commenced in July 2008 and continued until December 1 2008. Since then, the Project’s focus has been to complete the tasks necessary to bring the Project into production so further exploration has not been done.

10.2 Mapping

Denison geologists completed detailed geological mapping over the following prospect areas:

	•		Chizwabowa, Chizwabowa West — Nakwilimba,

	•		Dibwe, Dibwe West, Dibwe North,

	•		Lutele,

	•		Mutanga East,

Reconnaissance mapping was completed for parts of Mutanga and Mutanga North.

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These mapping exercises indicated that lithologies at Dibwe North are either MMF or the EGF. The EGF in the area can further be subdivided into ‘A’, ‘B’ and ‘C’ units. The ‘A’ unit, (base of the stratigraphic sequence), consists of mainly coarse grained, medium to poorly sorted sandstones, ‘B’ is inter-bedded sandstones and mudstones and ‘C’ is mainly composed of fine grained sandstones, with very minor or no clays/mudstones.

The MMF, in the south-western part of the area, is unconformably overlain by the EGF in the northern parts. The MMF consists of dark brownish-grey mudstones with occasional massive dark clay matrix.

At Dibwe West, the geology consists of EGF Package ‘B’ sandstones unconformably overlaying the Madumabisa Mudstones. The mudstones are exposed in the northern part while the sandstones are exposed in the southern part with the strike of almost E-W and shallow dips ranging from 10-18ºS. Overall the sandstones are coarse to fine grained but, from the logged RC chips, two distinct sandstone units can be deduced; (1) coarse to medium grained, presumably Braided Facies, and (2) medium to fine grained, presumably Meandering Facies. The sandstones are interbedded with clay or mudstone layers, mud clasts, mud balls and siltstone layers.

Mutanga East is comprised of coarse to very coarse grained sandstones that display graded bedding and medium to coarse grained cross bedded units. The sandstones are underlain by mudstones and overlain by weathered conglomeritic sandstones.

A brief geological appraisal of the Mutanga North prospect indicates that the geology is devoid of the top most lithological unit of the EGF (i.e. there is no Package C). It seems that the prospect’s geology is dominated by the EGF Package C sediments.

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11.0 DRILLING

Denison commenced reverse circulation (RC) percussion and diamond drill (DD) drilling operations on October 17, 2007 and completed this phase of work on December 1, 2008. The purpose of the drilling programs was to:

	•		Provide bulk sample material from the Dibwe prospect for metallurgical test work,

	•		Elevate the Project’s resource classification by increasing the drill hole density to:

	•		50m x 50m centres at Mutanga and

	•		50m x 100m centres at Dibwe Central.

	•		Improve the understanding of the geological models for Mutanga and Dibwe,

	•		Provide first pass exploration data for the radiometric anomalies identified by the 2005 and 2008 airborne geophysics programs.

All holes were logged for lithology, structure, alteration, mineralisation and geotechnical characteristics. Data was entered into DHLogger software on ruggedised tablet PCs in the field. The DHLogger data was transferred into a Fusion database.

All drill hole data was validated throughout the drilling program and as an integral component of the current recent resource estimation work. Hard copies of drill logs are stored at site.

11.1 Development Drilling

The first drilling of the Mutanga Project since Denison’s acquisition of OmegaCorp commenced on October 17, 2008 at Dibwe. The initial focus of the drilling campaign was to collect bulk sample material from the Dibwe prospect. This program continued until the onset of the rainy season in the first week of December 2007.

All rigs were relocated to the Mutanga Prospect for the 2007/08 rainy season. The objective of the program was infill drilling to consolidate the Mutanga JORC Indicated Resource. Drill hole spacing was 50 x 50m. After the end the rainy season (i.e. in April 2008), the rigs returned to Dibwe (Central) for a 50 x 100m infill program to raise the Dibwe resource estimate from Inferred to Indicated category. Development drilling was completed July 17, 2008 (Table 11.1) and the rig fleet transferred to exploration drilling (Table 11.2 and Table 11.3).

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Development Drilling Statistics

Development Drilling (October 17, 2007- December 31, 2007)			4,232m
Development Drilling (January 1, 2008 - July 17, 2008)			41,366m
Total Denison Development Drilling to end 2008			45,598m

Table 11.1: Denison Development Drilling Statistics


Exploration Drilling Statistics

Exploration Drilling (July 18 - December 1, 2008) (Includes 3,317m hydrogeology drilling)			27,341m
Total Denison Exploration Drilling to end 2008			27,341m

Table 11.2: Denison Exploration Drilling Statistics

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Prospect

Holes

Holes Mineralised

Prospect

Prefix

Drilled

> 100ppm

% Success

> 10m

> 500ppm

Hole Spacing

Recommendation

Mutanga West

400m x 400m; then closed up

Follow up drilling

Dibwe East

400m x 400m

Follow up drilling

Dibwe-Mutanga Corridor

400m x 400m

Follow up drilling

Dibwe West

400m x 400m

Follow up drilling

Mutanga East

400m x 400m

Follow up drilling

Dibwe North

113

400m x 400m

Follow up drilling

Bungua North Ridge

400m x 400m; then closed up

Follow up drilling

Mbendele

800m x 800m

Follow up drilling

Chaanga

800m x 800m

Review results; walk away?

Shante

800m x 800m

Review results; walk away?

Mulendema

800m x 800m

Review results; walk away?

Mutanga North

800m x 800m

Review results; walk away?

Totals

362

122

Does not include development drilling at the Mutanga and Dibwe prospects.

Table 11.3: Summary of 2008 Exploration Drilling Program.

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Figure 11.2: Dibwe Drill Hole Collar Plan — December 2008

11.2 Drill Collar and Down Hole Survey Data

A Topcon receiver/antenna/field controller system was purchased by Denison during 2007 to facilitate routine in-house DGPS surveying of drill hole collars. The unit communicates with the Fugro/OmniSTAR satellite service to give sub-metre survey accuracy; considered sufficient for collar surveys and development of a topography Digital Terrain Model (DTM).

During 2007 a program of high precision electronic down hole surveys was completed for the DD holes drilled at Mutanga in 2006. The survey proved that the holes’ dip and azimuth remain consistent within two or three degrees for most holes. The project database was updated with the new survey information and there was no material change to the previously issued resource statements.

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11.3 Specific Gravity

A dry bulk density range of 2.1 to 2.2 gcm³ is used, respectively based on core samples collected by OmegaCorp during 2006 from 12 PQ3 holes at Mutanga and hand specimens of the EGF.

11.4 Down Hole Geophysical Probing

Gamma logs record the amount of natural gamma radiation emitted by the rocks surrounding the drill hole. The most significant naturally occurring sources of gamma radiation are potassium-40 and daughter products of the uranium- and thorium-decay series. Clay- and shale-bearing rocks commonly emit relatively high gamma radiation because they include weathering products of potassium feldspar and mica and tend to concentrate uranium and thorium by ion absorption and exchange.

Down hole probing provides a robust equivalent U₃O₈ grade because it samples a much larger area than that of drill core or chips. The method is not affected by lost core.

During 2007 Denison purchased and implemented two complete “Mt Sopris” gamma probe systems, each consisting of gamma probe, winch, ruggedised notebook PC and software. A resistivity probe, calliper probe and spare gamma probe were also purchased.

Probes were calibrated at Grand Junction, Colorado and routinely in a test hole at Mutanga to monitor and quantify any instrument drift. Operators were trained and supported by Denison consultants on a continuing basis.

Denison’s policy at the Mutanga Project is for trained technicians to probe every drill hole immediately upon completion of drilling. Initially all holes were probed ‘open hole’ but local bad ground conditions and water flows necessitated probing be completed inside the drill string and, depending upon ground conditions, also in the open hole. Representative chips or core from the anomalous sections of holes that collapsed prior to down hole probing were sent for XRF analyses.

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12.0 SAMPLING METHOD AND ANALYSIS

12.1 Sampling

Sampling of the drill-holes for U₃O₈ content has been by the following methods:

	•		Down-hole radiometric logging,

	•		Riffle splitting RC chips,

	•		Half drill core.

12.2 Scintillometer Logging

All drill core and chips were systematically logged with a Terraplus RS-125 Gamma-Ray Spectrometer/Scintillometer, the data entered into DHLogger software and transferred to the Fusion database.

As detailed in Appendix 2, drill core was logged with two readings taken every 0.50 metres on each count with the results being averaged for analytical work.

12.3 Down Hole Logging

All core was logged in accordance with the procedure detailed in Appendix 2.

12.4 Diamond Core Sampling

12.5 RC Drill Hole Sampling

All percussion chips were collected via a cyclone and split on site at the time of drilling. The cuttings for each metre are put through a riffle splitter to give a notional 1.5kg primary sample; a notional 1.5kg field duplicate and, depending on the hammer size, a residual bulk sample of approximately 15-20kg.

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13.0 SAMPLE PREPARATION, ANALYSES AND SECURITY

13.1 Geological Logging

Geological data collected by Denison includes the primary and secondary lithologies, grain size information, matrix type, presence of visible uranium mineralisation, weathering and hardness.

13.2 Sampling — Diamond Drilling

On the basis of geological logging and scintillometer readings, mineralised intercepts from selected holes was cut with a dry diamond blade to minimise core destruction and loss of uranium mineralisation by flushing with water. Half core was sent to Genalysis Analytical Laboratories in Johannesburg, RSA for sample preparation. Pulps were sent to Perth, Australia for analysis at Genalysis’ laboratory by pressed powder XRF methods.

13.3 Sampling — RC Percussion Drilling

Approximately 10% of anomalous intercepts (more than twice background level of Counts Per Second as determined by a hand held scintillometer) in RC holes were selected for assay. Samples of mass approximately 1.5 kg were sent to Genalysis Analytical Laboratories in Johannesburg, RSA for sample preparation. Pulps were sent to Perth, Australia for analysis at Genalysis’ laboratory by pressed powder XRF methods.

Approximately 1.5kg primary samples representing anomalous intervals of RC holes that collapsed before they could be probed were also sent for pressed powder XRF analysis.

13.4 Sample Security

RC and diamond drilling campaigns sample were shipped to Genalysis Laboratories’ Johannesburg (RSA) for preparation. Once prepared, the assay pulps were forwarded by Genalysis to its Perth, Australia assay laboratory where the samples were held in secure, quarantined storage.

13.5 Analytical Laboratories

RC and diamond drilling samples were shipped to Genalysis Laboratories’ Johannesburg (RSA) for preparation. Assay pulps were forwarded by Genalysis to its Perth, Australia assay laboratory.

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13.6 Sample Procedure and Analytical Analysis

Denison’s contracted laboratory, Genalysis Laboratory Services, dries, crushes and mills the RC and diamond core samples. Crushers are cleaned with a silica rock (waste rock) after every sample. Milling is done in ring and puck pulverisers and contamination is avoided by cleaning with compressed air and silica rock (waste rock) after every sample. With every batch of 40 samples one waste rock blank is assayed, to monitor contamination and reported as a sample.

13.7 Assay Standards

During 2006, a bulk sample of material from the outcropping ridge line mineralisation at Mutanga was sent to MinTek, RSA for the production of a set of assay standards. The standards are included as check samples when RC chips are sent for chemical analysis.

13.8 Duplicate and Repeat Sample Analysis

Denison submits duplicate samples for analysis at the ratio of one duplicate to every 19 samples. At Denison’s request, Genalysis (Perth) completed check assays on 310 reject pulps from the SGS (Johannesburg) assaying of OmegaCorp’s 2006 drilling campaign. Overall, the SGS and Genalysis results correlated well despite the fact that reject pulps were used rather than the assay pulps (the original assay pulps had been disposed of). Nine of the 310 samples showed inconsistencies; i.e. +100ppm U₃O₈ from one lab reported as <<100ppm U₃O₈ by the other. Statistically this is within expectations considering the ‘nuggetty’ nature of the mineralisation.

Down hole gamma probing of all holes commenced with Denison’s drilling program in October 2007. Validation of the gamma probe (i.e. eU₃O₈ grades against XRF determinations by Genalysis) is detailed in Section 17.3, Figure 17.4 and Figure 17.7.

These were submitted as two sample batches for analysis in May 2008 from the recent 2007-2008 drilling campaign. The results of this validation is discussed in Section 17.3. Internal and external QAQC samples were included in the analysis, including field duplicates, field standards, field blanks and laboratory standards.

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13.9 Quality Control Procedures

A total of 91 samples underwent assay at SGS for QAQC analysis. These were submitted as two sample batches for analysis in May 2008 from the recent 2007-2008 drilling campaign. They included field duplicates, field standards, field blanks and laboratory standards.

The table below (Table 13.1) summarises the numbers of samples submitted and their proportion as percentages and ratios of the total number of assays submitted.


	Number of		% of Total
QAQC Sample/Assay Type	Samples*		Samples			Ratio
SGS Standard Samples		11		0.83	%		1:120
Omega Standard Samples		15		1.13	%		1:88
Omega Blank Samples		38		2.86	%		1:35
Omega Field Duplicate Samples		27		2.03	%		1:50


*		QAQC conducted on holes drilled in 2007-2008. Total number of samples from drill holes drilled in 2007-2008 was 1,327.

Table 13.1: QAQC Sample Breakdown.

13.9.1 Field Duplicates

There is a reasonable correlation between primary samples and their duplicates submitted by Denison. There is a general trend towards the under reporting of duplicates relative to their primary value as can be seen from where the points plot relative to the x=y line. However, 93% of duplicate samples submitted were below 100ppm U₃O₈ and therefore, moderate and higher grades are not well represented.

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Figure 13.1: Field Duplicate Scatter Plot

Three outliers lie significantly off the x=y line (Figure 13.1). All samples were taken from drill core and the effect may account for these outliers. It should be noted that the duplicate dataset contains few samples and as such, conclusions from statistical comparison are somewhat limited, suffice to say there appears to be no significant issues with duplicate repeatability, although it is highly recommended that in future drilling campaigns, the assay QAQC database is significantly increased, to a ratio of 1:20 rather than the current 1:50 and that QAQC samples are representative both of the grade distribution at each deposit/prospect and that sampled material is spatially representative of each prospect/deposit.

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13.9.2 Field Standards

Four field standards (low grade, medium grade, high grade and very high grade) were submitted to SGS for analysis to assess the level of confidence that can be applied to returned assay data from samples submitted in Denison’s recent drill sampling campaign. These are Certified Reference Materials (CRM) of which expected values and 95% confidence limits (low, high) are listed in Table 13.2.


									Data
	Number		Expected		Upper		Lower		Between			Beyond
Name of	of		Value		Action		Action		Action			Action
Standard	Samples		(ppm)		(ppm)		(ppm)		Limits			Limits
UREM 3		5		439		455		423		40	%		60	%
UREM 4		4		100		115		85		100	%		0	%
UREM 5		5		775		792		756		0	%		100	%
UREM 6		5		1887		1925		1867		0	%		100	%
*Total*		19								32	%		68	%

Table 13.2: List of Field Standards with Expected Values and Action Limits

UREM 3/SARM 23 is a moderate grade standard (expected value 439ppm). There is a trend towards over reporting of this standard. All five samples report over the expected value, with three outside of the action limits (Figure 13.2).

UREM 4/SARM 24 is a low grade standard (expected value 100ppm). Four samples were submitted and all performed well, returning values within the action limits close to the expected value (Figure 13.3). This is the grade range for which most duplicates were submitted.

UREM 5/SARM 25 was a moderate to high grade standard with an expected value of 775ppm. Four samples were submitted and all were above the 95% upper action limit, assaying on average 10% above the certified value (Figure 13.4).

UREM 6/SARM 26 (expected value 1887ppm) also performed poorly. Five samples of this standard were submitted and four over-reported above the 95% upper action limit and one underreported significantly by over 10% (Figure 13.5).

Control plots are plotted against Batch ID and therefore time. In cases where cyclical patterns of assays against Time can be seen in control plots for standards, it can commonly be attributed to analytical drift where assays report closer to their expected values when the analytical equipment is re-calibrated and drift further from their true values between calibrations. However, without consultation with the laboratory addressing the reasons for cyclicity, this cannot be confirmed.

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									Data
	Number		Expected		Upper		Lower		Between			Beyond
Name of	of		Value		Action		Action		Action			Action
Standard	Samples		(ppm)		(ppm)		(ppm)		Limits			Limits
UREM 3		2		439		455		423		0	%		100	%
UREM 4		2		100		115		85		50	%		50	%
UREM 5		2		775		792		756		0	%		100	%
UREM 6		1		1887		1925		1867		0	%		100	%
*Total*		7								10	%		90	%

Table 13.3: List of laboratory Standards with Expected Values and Action Limits

Figure 13.6: Control Plot for all Internal Laboratory Standards

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13.9.3 QAQC Conclusions

Conclusions from the assay QAQC analysis of the 2007-2008 drilling campaign are;

•

Blanks submitted by Denison all performed very well with all samples reporting below detection. This suggests that field sampling methods and contamination-limiting procedures at SGS are adequate.

•

Results from the submission of external field standards was mixed. On average, two out of every three samples reported within ±10% of their expected values. The aim should be to increase this number and in future drilling campaigns, should any samples fall outside the action limits (±95% confidence levels, the cause should be investigated and resolved by re-assaying the same sample and/or reviewing field and laboratory procedures.

•

Results from internal standards (UREM standards) were poor overall (Figures 13.6 to 13.10 and Table 13.3). Six out of seven standards reported within ±10% of their certified values, but the average percentage error was 11% outside the expected value. This issue should be raised with the laboratory and the samples re-assayed to ensure results are accurate.

•

Although not available at the time the QAQC review was completed, at the time of reporting, spreadsheet data for additional internal laboratory standard reference material, blanks and duplicate samples was received and reviewed. This data suggests internal laboratory QAQC practises to be adequate. Ongoing monitoring of internal laboratory control alongside external control is highly recommended as part of future drilling programs and should be implemented as a matter of course. A set of pulp duplicates should be submitted to an umpire laboratory which can then be analysed alongside SGS samples, also testing laboratory precision.

•

The number of QAQC samples submitted overall was low and it is advisable that in future drilling campaigns, this number should be increased to be more representative. It is highly advisable that, as a matter of course, QAQC data should be analysed concurrently with drilling. By doing this, if issues arise, it allows for the laboratory to be consulted, samples re-assayed and procedures reviewed if necessary, resulting in problems being resolved at the time and prevented for the rest of the campaign.

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14.0 DATA VERIFICATION

14.1 Quality Control Procedures

No detailed QAQC data is available to validate the historical drilling. A comprehensive QAQC program must be completed during the next phase of drilling. CSA are comfortable that if the overall grade distribution of the infill drilling compares favourably with the historical drilling, then the use of the historical data in future resource updates can be justified.

All uranium exploration technical information is obtained, verified and compiled under a formal quality assurance and quality control program in Zambia. The following details the protocols used by all Denison staff and consultants.

14.1.1 Processes for Determining Uranium Content by Gamma Logging

Exploration for uranium deposits in Zambia typically involves identification and testing of sandstones within reduced sedimentary sequences. The primary method of collecting information is through extensive drilling (both Reverse Circulation and Diamond Drill coring) and the use of down hole geophysical probes. The down hole geophysical probes measure natural gamma radiation, from which an indirect estimate of uranium content can be made.

The radiometric (gamma) probe measures gamma radiation which is emitted during the natural radioactive decay of uranium. The gamma radiation is detected by a sodium iodide crystal, which when struck by a gamma ray emits a pulse of light. This pulse of light is amplified by a photomultiplier tube, which outputs a current pulse. The gamma probe is lowered to the bottom of a drill hole and data is recorded as the tool is withdrawn up the hole. The current pulse is carried up a conductive cable and processed by a logging system computer which stores the raw gamma cps data.

If the gamma radiation emitted by the daughter products of uranium is in balance with the actual uranium content of the measured interval, then uranium grade can be calculated solely from the gamma intensity measurement. Down hole cps data is subjected to a complex set of mathematical equations, taking into account the specific parameters of the probe used, speed of logging, size of bore hole, drilling fluids and presence or absence of and type of drill hole casing. The result is an indirect measurement of uranium content within the sphere of measurement of the gamma detector.

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The basis of the indirect uranium grade calculation (referred to as “e U₃O₈ “ for “equivalent U₃O₈”) is the sensitivity of the sodium iodide crystal used in each individual probe. Each probe’s sensitivity is measured against a known set of standard “test pits,” with various known grades of uranium mineralization, located at the U.S. Department of Energy’s Grand Junction, Colorado office. The ratio of cps to known uranium grade is referred to as the probe “K-Factor,” and this value is determined for every gamma probe when it is first manufactured and is also periodically checked throughout the operating life of each probe. In addition, certain boreholes at the Mutanga property are cased and the probes are periodically checked for any instrument drift. Application of the K-Factor, along with other probe correction factors, allows for immediate grade estimation in the field as each drill hole is logged.

14.1.2 Core Sampling, Processing and Assaying

Core and reverse circulation chip samples are collected for a number of purposes in addition to purely geological reasons: verification of lithology as determined from geophysical logging and examination of drill cuttings if RC; determination of uranium content as a general check of gamma probing to determine if gamma measurement and chemical uranium content are close to balance (this is referred to as “radiometric disequilibrium”); whole rock analysis; and specific geochemistry for uranium species and other minerals of interest. Core diameter is typically 76mm. For zones selected for laboratory analyses, one half of the core will normally be used and the other half retained. The minimum length of core submitted is usually 0.2 metres and the maximum length per sample is 0.4 metres. Sample intervals are selected by geologists in the field based on lithology, oxidation/reduction and uranium grade (from gamma logging and from hand-held gamma counters).

Samples are analyzed at the Genalysis Laboratory Services PTY LTD (“Genalysis”) in Perth, Australia. Samples are transported in a dedicated truck from Zambia to Johannesburg, where Genalysis operates a dedicated sample preparation facility. The sample is crushed, pulped and homogenized and a sample pulp is air freighted to the lab in Perth, Australia.

This laboratory has been in operation since 1975 and now processes over 1,000,000 samples per year. It is fully certified and accredited by Australian standards. Genalysis is an accredited NATA (National Association of Testing Authorities, Australia) laboratory (Number 3244). Genalysis has been approved by AQIS (Australian Quarantine and Inspection Service) for the receipt and treatment of samples from interstate and overseas. Genalysis is an Associate Member of the Association of Mining and Exploration Companies Inc. and a Member of the Standards Association of Australia.

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14.1.3 Quality Assurance and Quality Control Measures

Drill hole logging is conducted by trained and dedicated personnel devoted solely to this task. The tools and a complete set of spares, were manufactured by Mount Sopris Instrument Company in Golden, Colorado and were shipped to Zambia in 2007, ahead of the drilling season. Denison has retained the services of a senior geophysical consultant, an expert in down hole geophysical probing for uranium, to oversee training, implementation and quality control protocols with the Zambian logging personnel. All tools were checked and calibrated before being shipped to Zambia and a variety of system checks and standards have also been established for routine checking and calibration of tools. In addition, Denison cased a mineralized hole at one of its centrally located exploration areas and this cased hole was logged periodically to ensure exact repeatability of the gamma probes.

Drill hole logging data is stored on digital media in the logging truck at the exploration sites. The digital data are periodically brought in from the field locations to the Lusaka office. The raw and converted logging data are copied and then sent via e-mail to Denison’s Saskatoon office, where all data is checked and reviewed.

Samples of drill core are chosen on the basis of radiometric data collected during core logging. This radiometric data is obtained by using a hand-held scintillometer and on the basis of subsequent down hole probing. The general concept behind the scintillometer is similar to the gamma probe except the radiometric pulses are displayed on a scale and the respective count rates are recorded manually by the geologist logging the core. The hand-held scintillometer provides quantitative data only and cannot be used to calculate uranium grades, however, it does allow the geologist to identify uranium mineralization in the core and select intervals for geochemical sampling.

Additional samples are collected above and below the horizons of interest in order to “close-off” sample intervals. Sample widths are selected according to radiometric values and lithologic breaks or changes. All reasonable efforts are made to ensure that splitting of the core is representative and that no significant sampling biases occur. Once the sample intervals are identified, an exclusive sample number is assigned each interval and recorded by the on-site geologist.

After the geological logging of the core and sample selection, all of the selected sample intervals of drill core are split longitudinally at the drill site. One half of the core is placed in a new sample bag along with a sample tag corresponding to the sample number. The other half of the core is re-assembled in the core box and stored for future reference. Samples are transported by dedicated truck transport and delivered to Genalysis for preparation. As standard procedure, field duplicates are included in assay suites sent to the laboratory and reference samples are used to verify laboratory controls and analytical repeatability.

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14.2 Survey Control

All recent survey control has been set up using the UTM Coordinate: Arc 1950 Map Datum, Zone 35S. Historical survey control was completed by Datum Surveying Consultants, from Lusaka, Zambia. Denison has a high precision GPS system which has been used for all recent work. The absolute elevation datum for the area is yet to be accurately determined. Until this datum is established, the elevation datum as estimated by the Denison DGPS system has been used. This datum is on average 8m lower that the previously used historical datum. As a result all historical data has been adjusted in elevation to fit the current Denison datum.

14.3 Drill Hole Location

By 2005, several phases of drilling data covered the Mutanga and Dibwe areas (Table 14.1) and not all historical holes could be identified in the field.

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Hole

Num

Metres

Deposit

Prefix

Holes

Drilled

Comments

Mutanga

6,908.1

AGIP Diamond holes

650.2

Omega 2005 Twinned Diamond Holes

SWD

974.0

AGIP Short Wagon Percussion Holes

124

7,238.0

AGIP Wagon Percussion Holes

Sub-Total

283

15,770.3

Mutanga

547.1

AGIP Diamond holes

1,361.0

AGIP Wagon Percussion Holes

Mutanga

146.0

AGIP Diamond hole

420

AGIP Wagon Percussion Holes (*final depths estimated)

Sub-Total

2,474.1

Dibwe

DDH

5,255.4

AGIP Diamond holes

134

13,400.0

AGIP Wagon Percussion Holes (depths assumed to be 100m)

RMD

6,796.5

GSZ Regional Diamond Drill holes (some depths not certain)

Sub-Total

210

25,451.9

TOTAL

528

43,696.3

Table 14.1: Drilling Campaigns at Mutanga and Dibwe (2005)

The collar positions were determined in several stages. The first stage was to locate drill holes with identifiers in the field. The located drill hole coordinates were then used to geo-reference the AGIP drill hole location plan. The geo-referenced plan was used to produce a coordinate list for the remaining drill holes. The geo-referenced coordinates were used to find the remaining drill holes. As more holes were located, a second phase of geo-referencing took place to make the coordinate set more accurate. Drill holes were then marked, where found if located, or at the coordinate position if not located. A permanent peg was placed in the ground to mark these positions. All positions were surveyed with DGPS.

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The proportion of located and not located holes is presented in Table 14.2.


	Hole	Num		Holes		%
Deposit	Prefix	Holes		Located		Located			Comments
Mutanga	DD		65		25		38	%	AGIP Diamond holes
	MR		11		11		100	%	Omega 2005 Twinned Diamond Holes
	SWD		83		1		1	%	AGIP Short Wagon Percussion Holes
	WD		124		45		36	%	AGIP Wagon Percussion Holes
*Sub-Total*			*283*		*82.0*		29	%

Dibwe	DDH		40		20		50	%	AGIP Diamond holes
	WD		134		68		51	%	AGIP Wagon Percussion Holes
	RMD		36		0		0	%	GSZ Regional Diamond Drill holes
*Sub-Total*			*210*		*88.0*		42	%


*TOTAL*			*493*		*170.0*		34	%

Table 14.2: Proportion of Holes Located on the Ground

Further discussion on drill collar and down hold survey data is provided in Section 11.

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14.4 Down Hole Surveys

Historically, all holes were drilled vertically. No down hole survey data is available for historic drilling prior to Omega and Denison drilling campaigns. However, the amount of deviation is considered to be negligible because:

	•		Hole diameters are relatively large indicating large diameter drill rods with limited flexibility;

	•		Holes are relatively shallow with depths averaging 40m and ranging from 10 to 110m; and

	•		Bedding is relatively flat and rock competency low.

Omega drilling up until 2006 and Denison’s 2007-2008 drilling campaign consisted of diamond and reverse circulation drilling, predominately drilled vertically, along with some inclined holes. Limited checks on hole deviation demonstrated deviations of less than 2 degrees. All diamond holes were drilled at angles ranging from 55 to 80 degrees and at a number of azimuths although dominantly towards 135 or 315 degrees. Down hole survey measurements were taken using a single shot camera at 15m down hole intervals.

14.5 Surface Topography Validation 2007

Digital topographic data was supplied by New Resolution Geophysics (NRG), based in South Africa. NRG completed an air borne helicopter geophysical survey in May 2006. As part of that survey topographic elevation points were generated on a 20m x 20m regular grid. This grid was extensive and covered the current resource areas adequately. For both the Mutanga and Dibwe deposits the relevant portion of the topographic grid was extracted and converted into a digital wireframe surface. Due to the elevation datum change (Section 14.3) the wireframe topography surface was warped to fit the surveyed drill hole collar elevations of the Omega 2006 — 2007 data. All historical drill collars were then registered onto the “new” topographic surface and adjusted to fit precisely.

CSA recommend at the time that a correct regional elevation be established for the area and a detailed photogrammetric aerial survey be flown over the project areas to produce surface contours to +/-0.5m accuracy. The resulting DTM could then be used to correct drill hole collar elevations. An accurate topography DTM will be required for the production of accurate infrastructure and other mining related plans.

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The data was provided in UTM Arc 1950, Zone 35S coordinates. The absolute elevation of this data is not accurate but the relative topography profile after adjustment using drill hole collar data was considered reasonable for the purposes of resource estimation at that time.

The wireframe topography surface was compared to the surveyed drill hole collar elevations and the difference recorded.

14.5.1 Mutanga Digital Topography Model 2007

Comparison of the Mutanga drill hole collar surveyed elevation coordinates with the NRG topography wireframe showed an average difference of 2.2m after removing obvious outliers. The topography wireframe was adjusted accordingly by subtracting 2.2m from the Z coordinate. The distribution of differences between drill hole collar elevations and the topography DTM after adjustment is presented in Figure 14.1.

Figure 14.1: Distribution of Differences For Mutanga Topography DTM And Drill Holes

The mean of difference (after DTM adjustment) was close to zero but the variance ranges from -5 to +5 metres. The biggest differences occurred in areas of relatively steep or strongly vegetated topography. An example of the +ve differences after the DTM had been adjusted by the mean difference is shown in Figure 14.2. The differences were due to a combination of holes that were not yet accurately DGPS surveyed and the inaccuracies associated with air borne geophysical topographic survey methods.

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Figure 14.2: Three Dimensional View of Mutanga Drill Holes Showing Inconsistency between
Topography DTM and Drill Hole Collars

14.5.2 Dibwe Digital Topography Model 2007

Comparison of the Dibwe drill hole collar surveyed elevation coordinates with the NRG topography wireframe showed an average difference of 7.4m after removing obvious outliers. The topography wireframe was adjusted accordingly by subtracting 7.4m from the Z coordinate. The distribution of differences between drill hole collar elevations and the topography DTM after adjustment is presented in Figure 14.3.

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Figure 14.3: Distribution of Differences for Dibwe Topography DTM and Drill Holes

As for Mutanga, the mean of difference (after DTM adjustment) was close to zero but the variance ranges from -3 to +3 metres. The biggest differences occurred in areas of relatively steep or strongly vegetated topography. An example of the positive differences, after the DTM has been adjusted by the mean difference, is shown in Figure 14.4. The differences were due to a combination of holes that were not yet accurately DGPS surveyed and the inaccuracies associated with air borne geophysical topographic survey methods.

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Figure 14.4: Three Dimensional View of Dibwe Drill Holes Showing Inconsistency between
Topography DTM and Drill Hole Collars.

CSA recommend that a detailed photogrammetric aerial survey be flown over the resource areas to produce surface contours to +/-0.5m accuracy. The resulting DTM could then be used to correct drill hole collar elevations. An accurate topography DTM will be required for the production of accurate infrastructure and other mining related plans.

In Q1 2008 OML contracted Geoscientific Mineral Resources to collect and supply a bundle of IKONOS satellite data. Data received included:

	•		Digital elevation model (DEM) with 100m, 50m, 25m, 10m, 5m and 1m contours.

	•		1m True Colour Images.

	•		1m Multispectral Images.

	•		1m Panchromatic Images.

	•		Combined IKONOS and LANDSAT imagery (to increase the spectrum from 4 bandwidths to 7 bandwidths for easier land use distinction).

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14.6 Drill hole Recovery

The initial appraisal of AGIP data had highlighted significant core losses during drilling. In an attempt to reduce core loss problems during drilling, PQ diameter was generally used for the top sections of drill holes, with the diameter then being reduced to HQ and occasionally NQ. Although core losses were still encountered in weak conglomeritic, mudstone material and in areas of fracturing, slow penetration and telescoping of drill holes is thought to have reduced the possible effects.

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16.0 MINERAL PROCESSING AND METALLURGICAL TESTING

Bench scale test work was carried out by Denison at SGS Ore Test Lakefield in Perth, Western Australia in 2007. The test program was developed to:

	•		develop the optimal leach parameters;

	•		establish grindability characteristics of the plant feed;

	•		establish downstream process performance, e.g. settling and filtration assessments; and

	•		establish ion exchange performance.

The test material consisted of drill core samples from the Mutanga and Dibwe prospects. Samples consist of PQ3 (83.0mm) or HQ3 (61.1mm) diameter drill core. The net weight of the core despatched is 7,826kg, comprising 5,851.4 from Mutanga (including 1,262kg waste for pilot plant commissioning) and 1,975kg from Dibwe.

Mutanga samples were collected October 2006 and are either full core or have been cut for sampling (either a 1cm sliver sample or half core). Dibwe samples were collected between October — December 2007 and are full PQ3 or HQ3 core.

Metallurgical testing has shown the ore to be amenable to environmentally friendly alkali leaching at coarse grinds with rejection of barren scats from the grinding circuit. The results of the test work were favourable and indicated that U₃O₈ recoveries above 85% could be achieved through an alkali leach process at elevated temperatures, followed by solid-liquid separation and ion-exchange to produce a uranium concentrate.

Further bench scale test work is currently underway to further refine the process parameters in preparation for a pilot plant campaign.

Test work investigating the potential of acid heap leach is also in progress as an alternate processing methodology.

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17.0 MINERAL RESOURCE ESTIMATES

17.1 Mineral Resource Overview and Summary

A previous Mineral Resource estimate and JORC compliant public report including the Mutanga and Dibwe deposits was published by previous owners OmegaCorp (previous ASX listed company) on the ASX website (Titley, M. and Williams, D., November 2006).See Table 17.1.

OmegaCorp — Kariba Uranium Deposits - Zambia

Mineral Resource Estimate 29 August 2006


	Inferred		U₃O₈		U₃O₈
Deposit	Tonnes		(ppm)		(lbs)
Mutanga		7,000,000		400		6,200,000
Mutanga Extentions		500,000		340		400,000
Mutanga East		200,000		320		100,000
Mutanga West		500,000		340		400,000
Dibwe		8,200,000		370		6,600,000


*Total*		*16,400,000*		*380*		*13,700,000*

(Lower Cut-off grade of 200ppm U₃O₈)

Table 17.1: Mutanga and Dibwe Summary of August 2006 Mineral Resource Estimate

Infill drilling at the Mutanga and Dibwe deposits was completed during 2007 and 2008. An updated resource estimate, classified according to the CIM Definitions Standards, for the Mutanga and Dibwe deposits has been completed. This new resource estimate is described in this section.

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It should be noted that an update of resources for the Mutanga Extensions, Mutanga East and Mutanga West areas has not been completed as part of this study and there is no new data for these areas. Therefore, the resource estimates quoted in the 2006 Scoping Study Report remain current. For additional information relating to these resources areas and the methodologies employed to estimate resources, the reader is referred to the 2006 report.

Data manipulation, database creation, modelling and grade estimation was undertaken using Micromine v11 software. 3D block models for both deposits were converted to Datamine Studio format for use in resource optimisation studies, to be carried out by LQS (Perth) and which was underway at the time of writing this report.

During the resource estimation process, to ensure compatibility between Micromine and Datamine, all northing coordinate data was truncated, dropping the first digit. Therefore, a value of 8,000,000 is removed from the northing coordinate. Throughout this section of the report, northing coordinate data is given as truncated coordinates. 3D views shown in figures in this section of the report have had a 3× vertical exaggeration applied, unless otherwise stated.

New data (largely drilling data) was reviewed and validated before being merged with existing data for use in the new resource estimation. The geological and grade models for both deposits were reviewed and the geometry of historically defined mineralised domains improved via the 2D and 3D modelling of a significantly larger dataset than was available in previous resource estimations.

The statistical characteristics of domain data at both deposits were reviewed. Data suitable for inclusion in resource estimation work was flagged prior to the construction of variograms to investigate spatial grade continuity at both deposits. This provided input parameters for the grade interpolation process. 3D block models were created for both deposits constrained to mineralised domains. Grade interpolation into the block models on a domain by domain basis was undertaken using Ordinary Kriging (OK) and validated using the Inverse Distance Weighting (IDW) interpolation technique.

The resource models for both deposits were then validated. The 2008 Mineral Resource estimate for Mutanga and Dibwe is detailed in Table 17.2. CIM Definitions Standards 2005 have been applied for the classification of these Mineral Resource estimates.

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	U₃O₈
	Lower		Measured						Indicated						Inferred
	Cut-off		Tonnes		U₃O₈		U₃O₈		Tonne		U₃O₈		U₃O₈		Tonne		U₃O₈		U₃O₈
Deposit	(ppm)		(Mt)		(ppm)		(Mlbs)		s (Mt)		(ppm)		(Mlbs)		s (Mt)		(ppm)		(Mlbs)
Mutanga		100		1.88		481		1.99		8.4		314		5.82		7.2		206		3.3
Mutanga Ext*		200														0.5		340		0.4
Mutanga East*		200														0.2		320		0.1
Mutanga West*		200														0.5		340		0.4
Dibwe		100								—		—		—		17.0		234		9.0

*Total*				*1.88*		*481*		*1.99*		*8.4*		*344*		*5.82*		*25.47*		*231*		*13.16*

Resources for Mutanga Ext, Mutanga East and Mutanga West have not been updated in 2008 and remain current.

Table 17.2: Mutanga Project — Summary of Current Resources as at December 2008

17.2 Input Data

17.2.1 Drilling Data

The existing project data base was combined with new drilling data from the 2007 and 2008 infill drilling program. All data was validated and converted to Micromine format. This process ensured a single validated database was available for resource estimation.

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The types of drilling data available for use in modelling and resource estimation are presented in Table 17.3 and Table 17.4. This data comprises historical data collected prior to Omega’s involvement and recent drilling data from Omega and Denison drilling campaigns between 2005 and 2008.


Deposit	Hole Prefix	Holes		Drilled (m)		Comments
Mutanga	DD		65		6,908.8	AGIP Diamond holes
	MR		11		650.2	Omega 2005 Twinned Diamond Holes
	SWD		83		974.0	AGIP Short Wagon Percussion Holes
	MWD		124		7,238.0	AGIP Wagon Percussion Holes
	MRC		71		2,052.0	Omega 2006 RC holes
	MTDH		12		465.9	Omega 2006 PQ Metallurgical Diamond Holes
	MDH		16		1,001.6	Omega 2006 HQ and PQ Geological Diamond
	MTC		211		11,494.27	Denison 2007-08 infill RC holes
	MTD		217		12,513.32	Denison 2007-08 infill Diamond Holes
	MGSC		28		1032.00	Denison 2007-2008 Geostatistical RC holes
	MGSD		16		566.07	Denison 2007-2008 Geostatistical Diamond holes
*Sub-Total*			*854*		*44,896.16*

Dibwe	DDH		40		5,255.4	AGIP Diamond holes
	DWD		134		13,400.0	AGIP Wagon Percussion Holes (depths assumed to
	RMD		25		3,804.7	GSZ Regional Diamond Drill holes (depths not
	DRC		25		1,362.0	Omega 2006 RC holes
	DWRC		8		608.0	Dibwe West Omega 2006 RC holes (not used for
	DBC		89		5,547.45	Denison 2007-2008 infill RC holes
	DBD		165		14,492.09	Denison 2007-2008 infill Diamond holes
*Sub-Total*			*486*		*44,469.64*


*TOTAL*			*1340*		*89,365.80*

Table 17.3: Drilling Data Used in 2008 Modelling and Resource Estimations.

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In addition to the historical data discussed in Section 6, assay and gamma data from the recent 2007-2008 drilling campaign was checked for errors. Validated drilling information is included in Table 17.4. Data which could not be validated has been excluded from the resource estimate.


	Hole					XRF assays				Gamma Readings
Deposit	Prefix	Holes		Metres Drilled		Num		m		Holes		Records*
Mutanga	MTC		211		11,494.27		23		526.00		193		93,400
	MTD		217		12,513.32		21		468.00		206		10,864
	MGSCC		28		1032		0		0		28		9,601
	MGSD		16		566.07		0		0		15		4,707
*Sub-Total*			*472*		*25,605.66*		44		*992.00*		*442*		*118,572*

Dibwe	DBC		89		5,547.45		12		260.00		84		40,221
	DBD		165		14,492.09		6		73.00		159		31,827
*Sub-Total*			*254*		*20,039.54*		18		*343.00*		*243*		*72,048*


*TOTAL*			*726*		*45,645.20*						*685*		*190,610*


*		Composited 1m gamma records.

Table 17.4: Recent Sample Data Used in Resource Estimation

17.2.2 Topographic Data and Validation

Topographic data over the project area was available for use in resource estimation work. The deposit is located in an area of low to moderate relief, with an elevation differential of approximately 45m between highest and lowest drill hole collars. The land surface is near parallel to the south-south-easterly dip of the sediments (15^oto 20^o) south dip of the sediments. The northern side of the deposit is bounded by a north sloping escarpment, where elevation falls approximately 30m over a distance of 200m.

Updated digital topographic data for the project from Geoscientific Mineral Resources SA (Centre for Advanced Satellite & Mineral Exploration) and comprised orthorectified and re-projected IKONOS Satellite Image data as 20m, 10m and 5m contour data. The 5m contoured digital data was imported into Micromine and a new DTM topographic surface created (Figure 17.1) and compared to historic topographic data held by CSA. A review of this data highlighted several discrepancies between the positions of known holes in relation to prominent topographic highs at Mutanga (particularly the escarpment to the north) and Bungua (a prospect to the east of Dibwe).

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Further investigation found that the digital topographic data supplied was presented in WGS84 datum coordinates and not the more relevant Arc 1950 (Area 44) datum, which is used on site and covers the project area. Therefore, the conversion from WGS84 to Arc 1950 (44) was applied and the DTM surface recreated. The conversion applied to x and y values was +288m added to the y (northing) and 0.6m added to the x (easting). Once recreated, the DTM surface was reviewed and hole positions relative to surface features investigated once again.

Figure 17.1: Mutanga Topographic DTM (Oct 2008).

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After DGPS collar re-surveying of new holes at Mutanga and Dibwe, collar elevations were compared to the topographic DTM. The difference between each collar elevation and the elevation of the topographic surface at the same x and y coordinate was calculated. Figure 17.2 below shows the difference in elevation for each hole at Mutanga (top left) and Dibwe (bottom centre). Classical statistical analysis was undertaken on elevation data and the average differences generated. At Mutanga, an average difference of 10.5m is observed, whilst at Dibwe this value is 11.5m. On closer inspection, it is apparent that the greatest differences occur in areas with relatively high elevation (Figure 17.3), a function of topographic contour smoothing at the highest elevations.

To investigate ways in which collar elevations could be assigned more accurately, collar elevations were adjusted at Mutanga and Dibwe by 10.5m and 11.5m respectively (Table 17.5) and a revised topographic DTM created using the new collar points. This DTM was then compared to the satellite image derived DTM. The modified topography does not honour the contouring of the recent topographic surface and introduces a greater degree of variation in elevation than is observed on the ground. Therefore, it was decided that collar elevations written to the database would be derived by draping existing collars on to the recent topographic surface, with no elevation correction applied.

The satellite image derived DTM surface represents the most accurate topography and draped collar elevations are accurate to +/- 2.5m at lower levels and +/- 5.0m at higher elevations.

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				All				Mutanga				Dibwe
Recent				outliers				outliers				outliers
Drilling		All		removed		Mutanga		removed		Dibwe		removed
Re-surveyed collars	MEAN		11.30		10.22		10.90		10.80		11.84		9.41
	MEDIAN		10.42		10.23		11.28		11.20		10.23		9.45
Non-resurveyed collars	MEAN		11.13		10.80		11.00		10.53		11.48		11.48
	MEDIAN		10.64		10.58		9.33		9.22		11.68		11.68
RL adjustment to be applied to original RL values									10.5				11.5

Table 17.5: Average Elevation Difference of New Holes at Mutanga and Dibwe.

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Figure 17.3: Mutanga Collars, Coloured by RL Difference.

17.3 Data Validation

17.3.1 Drill Hole Data Validations.

Collar, down-hole gamma data, chemical assay data and survey data for new drilling was converted from excel spreadsheets to .csv file format and imported into Micromine. A temporary database of new data was created and the following validations were preformed:

	•		Checking for duplicate collar, gamma, assay and survey data.

	•		Checking for overlapping intervals.

	•		Checking for missing data.

	•		Checking for incorrect survey dip and azimuth data.

	•		Validation of end of hole depths.

	•		Visual validation of hole positions with respect to local cross section nomenclature.

	•		Visual validation of collar x, y and z coordinates against updated topographic data.

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			No of holes
			requiring		No of holes
Deposit	No of new holes		re-survey		re-surveyed
Mutanga		472		24		54	*
Dibwe		249		74		102	*
Mutanga & Dibwe		721		98		213	**


*		In addition to those holes requiring re-survey due to GPS inaccuracies, additional holes were selected by Denison validation purposes.

**		In addition to those holes from Mutanga and Dibwe that were re-surveyed, additional holes drilled outside of these resource areas were also the subject of re-surveying activities.

Table 17.6: GPS Surveyed Holes Re-surveyed by DGPS

	•		Several holes had conflicting end of holes depths when comparing gamma data and collar data. Where these issues could not be resolved, the holes in question were flagged in the database, used in the grade interpretation stage but removed from the final resource estimation dataset. A total of 3/472 holes were flagged in the database.

	•		Following re-surveying, all holes were checked in 3D and on cross section. Several holes were found to plot incorrectly. Where these discrepancies could not be resolved, these holes and all data pertaining to them were removed from the final resource estimation dataset. A total of 14/472 additional holes were removed from the final resource estimation dataset.

	•		Following re-surveying activities, collar elevation data was compared to the new topographic DTM and any discrepancies investigated. A number of issues came out of this work, which are discussed in Section 17.2.2.

17.3.2 Gamma Data Review

During the recent drilling campaigns at Mutanga and Dibwe, down-hole gamma logging was routinely undertaken at the completion of each hole, except in those holes which suffered wall cave-ins or where a high risk of tool loss was present.

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Historical resource estimates for both Mutanga and Dibwe have relied to a large extent on historic chemical assay data, some of which cannot be verified. With the recent infill drilling campaign the drill hole database has become significantly larger. Gamma probe derived e U₃O₈ is the dominant grade data medium. See Section 14.1.1 for further discussion on the application, test work and reliability of the gamma logging conducted for these deposits. No significant issues have arisen from this work and gamma probe data is considered valid for use in resource estimation work. Gamma probe calibration information (including an example of the WellCAD output for routine probe calibration QAQC using the MTD test hole on site, as well as tool calibrations undertaken in the US) is contained in Appendix 4.

Prior to the consideration to use gamma data from new holes in the resource estimations, a comparison was made between gamma data and corresponding QAQC chemical assay data. At Mutanga, a total of 486 drill holes were used in the grade interpretation, comprising 240 recent holes with gamma data and 246 holes (largely historic holes) with assay data. 339 recent chemical assays from 16 holes, along with 1,313 historical assays were available for comparison with gamma data.

At Dibwe, a total of 208 drill holes were used in the grade interpretation, comprising 149 recent holes with gamma data and 59 historical holes with assay data. 89 QAQC chemical assays from 7 holes, along with 193 historical assays were available for comparison with gamma data.

Given this small sample population relative to gamma data, direct comparison on an interval-by-interval basis was not considered, not least because available assay data is not representative of all mineralised grade ranges (especially grade ranges >200ppm) nor spatially representative of each deposit. A more valid approach is to use the comparison of overall population statistics from all assay data and all gamma data, to assess the validity of gamma data for use in resource estimation. It was this approach that was adopted.

17.3.2.1 Mutanga

Classical statistics and histogram/probability plot (Figure 17.4 and Figure 17.5) comparisons for Mutanga are contained in Table 17.7.

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Summary Statistics — All Mutanga Assay and Gamma Data


	U₃O₈ (ppm)		e U₃O₈ (ppm)
Number		1,652		3,505
Minimum		0		0
Maximum		8,400		12,906
Mean		317.24		374.95
Median		157.00		175.00
Std Dev		556.29		697.51
Variance		309,453.53		486,518.78
Std Error		0.34		0.20
Coeff Var		1.75		1.86

Log Num		1,612.00		3,504.00
Geom Mean		168.04		206.42
Log Min		0.00		2.71
Log Max		9.04		9.47
Log Mean		5.12		5.33
Log S Dev		1.16		0.96
Log Var		1.35		0.92

Sichel Stats
Mean		330.05		326.47
V		1.35		0.92
Gamma		1.96		1.58

Percentiles
10		45		71
20		73		101
30		100		120
40		124		143
50		157		175
60		199		220
70		258		289.5
80		383.6		428
90		680		731.5
95		1,107.2		1,309.75
97.5		1,888.3		2,080.125
99		2,888.32		3,698.8

Table 17.7: Comparative Sample Statistics — Mutanga

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A review of the population graphs above indicates that the gamma population exhibits higher grades overall, especially in grade ranges below 200ppm and this trend is not unexpected. The shape of the two distributions is broadly similar, being slightly positively skewed, with greater relative deviation at the extremes of the distribution.

Further analysis of a variety of grade ranges (<100ppm, 100ppm-500ppm and 500ppm+) showed that in the range 100-500ppm, which represents most of the potentially economic mineralisation over the project, absolute population average grade differs by only 5ppm and the statistical characteristics of the two populations (as as shown by the box and whisker plots in Figure 17.6 below) are very similar. A modification value of 5ppm was subtracted from all values within the gamma population and the population statistics revisited (Table 17.8).

Figure 17.6: Probability Plot of Mutanga Raw Assay and Gamma Data (>100ppm<500ppm)

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Summary Statistics — Mutanga Assay and Gamma Data


	U₃O₈ (ppm)		adj e U₃O₈ (ppm)		_e U₃O₈ (ppm)
Number		1,652		3,505		3,505
Minimum		0		10		0
Maximum		8,400		12,901		12,906
Mean		317.24		370.055		374.95
Median		157.00		170		175.00
Std Dev		556.29		697.58		697.51
Variance		309,453.53		486,617.526		486,518.78
Std Error		0.34		0.199		0.20
Coeff Var		1.75		1.885		1.86

Log Num		1,612.00		3,504		3,504.00
Geom Mean		168.04		199.045		206.42
Log Min		0.00		2.303		2.71
Log Max		9.04		9.465		9.47
Log Mean		5.12		5.294		5.33
Log S Dev		1.16		0.985		0.96
Log Var		1.35		0.97		0.92

Sichel Stats
Mean		330.05		323.226		326.47
V		1.35		0.97		0.92
Gamma		1.96		1.624		1.58

Percentiles
10		45		66		71
20		73		96		101
30		100		115		120
40		124		138		143
50		157		170		175
60		199		215		220
70		258		284.8		289.5
80		383.6		423.2		428
90		680		726.6		731.5
95		1,107.2		1,304.8		1,309.75
97.5		1,888.3		2,075.4		2,080.125
99		2,888.32		3,694.24		3,698.8

Table 17.8: Mutanga Summary Statistics (Modified Data)

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Figure 17.7: Histogram Trace of Mutanga Raw Assay Data (orange) and Modified Gamma Data (blue)

Figure 17.8: Probability Plot of Mutanga Raw Assay Data (orange) and Modified Gamma Data (blue).

Although the population average of gamma data remains somewhat higher than that for assay data, Figure 17.8 above shows that a good correlation is evident between the two datasets in the grade range 100-500ppm. Although there is a marked difference between the assay and gamma populations in the lower grade range (<100ppm), the influence this data will have on the resource

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estimate, which is constrained to domains based on a 100ppm lower cut-off, is likely to be small. At the higher grade range (>500ppm), although gamma data has returned higher grades than chemical assays, this data represents less than 2% of the sample population and the influence of high grade outliers will be controlled, to some degree, by the balancing cut applied prior to modelling.

17.3.2.2 Dibwe

Classical statistics and histogram/probability plot comparisons for Dibwe are contained in the following tables (Table 17.9) and graphs (Figures 17.9 and 17.10).

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Summary Statistics — All Dibwe Gamma and Assay Data


	CHEMICAL ASSAY		e U₃O₈
	U₃O₈ (ppm)		(ppm)
Number		282		1498
Minimum		0.1		0
Maximum		1680		3102
Mean		244.11		242.40
Median		170.00		162.00
Std Dev		252.77		248.75
Variance		63,892.17		61,875.28
Std Error		0.90		0.17
Coeff Var		1.04		1.03

Log Num		282.00		1,471.00
Geom Mean		121.20		173.57
Log Min		-2.30		2.57
Log Max		7.43		8.04
Log Mean		4.80		5.16
Log S Dev		1.73		0.84
Log Var		2.99		0.71

Sichel Stats
Mean		665.91		246.85
V		2.98		0.70
Gamma		5.49		1.42

Percentiles
10		24		54
20		57		89
30		102		112
40		134		136
50		170		162
60		217		197
70		275		256
80		376		359
90		556		525
95		723		672
97.5		972		858
99		1,174		1,219

Table 17.9: Comparative Sample Statistics — Dibwe

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Figure 17.9: Histogram Trace of Dibwe Raw Assay Data (orange) and Modified Gamma Data (blue)

Figure 17.10: Probability Plot of Dibwe Raw Assay Data (orange) and Gamma Data (blue).

The assay and gamma populations at Dibwe show similar statistical characteristics (Figures 17.9 and 17.10), having similar mean and standard deviation values and both showing normal distributions with similar dispersion as shown by a low CV of close to 1. Above 100ppm the two distributions show close correlation and therefore the decision was made not to modify the gamma data.

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17.3.3 Gamma Data Review — Conclusions

The number of recent check assays with which to validate the large amount of gamma data generated during the recent infill drilling campaign is low. In order to increase the level of confidence that can be applied to the indirect method of uranium grade calculation via gamma probing, it is recommended that additional check assaying be undertaken, particularly at Dibwe, that ensures not only that returned assays are representative of all grade ranges estimated by gamma probing, but also spatially representative.

Nevertheless, combining recent assay data with validated historic data has allowed a larger sample population to be used to validate gamma data. Statistical analysis suggests the two data populations show similar characteristics and are statistically compatible. These two sample supports are considered reliable for the purposes of resource estimation.

17.4 Geological Modelling

Data available for the resource update included the historical data used in the December 2006 resource estimation plus all available recent 2007 and 2008 Denison drilling data.

Prior to updating the geology/grade models for each deposit, historic interpretations were reviewed in the light of significant new data which has provided valuable infill drilling data at both deposits. Infill drilling has allowed the cross sectional interpretation of mineralised zones at both deposits to be refined. The positions of major bounding fault and fracture zones at both deposits constructed using surface mapping data and developed for use in the December 2007 resource estimations remain valid and these bounding structures have influenced the subdivision of the mineralised zones at both deposits in to several domains.

Mineralisation outlines based on U₃O₈ (historical data) and eU₃O₈ (recent data) grade intercepts were interpreted using a 100ppm cut-off, honouring the local stratigraphy and bounding fault or fracture structures.

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17.4.1 Geological Interpretation — Mutanga Deposit

The four mineralised zones outlined during the previous resource estimate in 2006 remain valid and an additional zone has been delineated in the west of the deposit. Five sets of fault bounded zones were digitised and coded with a MIN code to differentiate the zones (Figure 17.11).

	1.		MIN 1 — West boundary zone, bounded by fault or fracture zones trending NNE. Outcrops on western edge of the Mutanga escarpment.

	2.		MIN 2 — Upper near surface zone of mineralisation. Outcrops along Mutanga escarpment. Gentle dip to SSE, bounded to the south by inferred NE trending fault or fracture zone.

	3.		MIN 3 — Deepest zone. Down-thrown mineralisation, trending NE. Bounded by two NE trending steep fault or fracture zones.

	4.		MIN 4 — Near surface mineralisation, trending NE. Bounded by two NE trending steep fault or fracture zones.

	5.		MIN 5 — Sub-horizontal zone of mineralisation, below MIN4. Bounded by two NE trending steep fault zones.

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Figure 17.11: Mutanga Mineralised Domains and Drill Hole Coverage.

The revised mineralised envelopes at Mutanga were interpreted in 2d cross section using available hole intercepts. In some areas the envelopes were extrapolated through some “barren” holes to maintain geological continuity, however extensive zones of barren material were not included so that grade dilution was kept to a minimum. Generally only intercepts which were greater than 1m in thickness were considered in the interpretation. At the margins of the deposit, mineralised envelopes were extrapolated by a distance equal to half the drill hole spacing where drill coverage exists and by 50m at the edge of drill coverage.

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Figure 17.13: Representative Mutanga 3-D View

17.4.2 Geological Interpretation — Dibwe Deposit

A process similar to that described for Mutanga was used at Dibwe. Dominant fault and fracture positions were reviewed in the light of new data and mineralised zone interpretations refined. Outlines at a nominal U₃O₈ cut-off of 100ppm were interpreted to follow gross bedding horizons. The overall bedding dip at Dibwe appears steeper than at Mutanga. As part of the resource estimation undertaken in 2006, general uncertainty surrounding the exact position of some of the mineralised intercepts and relatively sparse data coverage resulted in a more generous mineralisation interpretation than that used for Mutanga. In the light of new infill drilling data, mineralised zone extents are better defined and therefore the constraint of half drill hole spacing or 50m extrapolation was applied at Dibwe.

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The mineralisation zones at Dibwe appears to be more closely related to stratigraphic control with minor faulting or fracture related features occurring in the central zone. The Dibwe mineralisation envelope is thinner than Mutanga with an average thickness of around 3-5 metres. As in December 2006, three sets of fault bounded zones were digitised and coded to differentiate the zones:

	1.		NW — Small isolated north-west zone based on a two drill hole intercepts, bounded by fault or fracture zones trending NE.

	2.		CENTRAL — Dominant central zone of mineralisation, bounded on both sides by inferred NE trending fault or fracture zones. Comprising 13 discrete and semi-continuous sub-zones.

	3.		SE — Deepest zone. Down-thrown mineralisation, trending NE. Potentially open at depth to the SE and comprised of 9 discrete sub-zones.

Representative plan, cross section and 3-D views of the Dibwe mineralisation are presented in Figure 17.14, Figure 17.15 and Figure 17.16. Note 3X vertical exaggeration used in the section and 3D views.

Figure 17.14: Dibwe Mineralised Domains and Drill Hole Coverage.

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Figure 17.16: Dibwe 3D View of Mineralisation Surfaces.

17.5 Statistical Analysis

17.5.1 Historic Data Analysis

During 2007 a review was undertaken of the various methods of uranium determination undertaken at both deposits during historic drilling (pre-2005) campaigns. At that time the sample database was dominated by data derived via historical indirect uranium determination and calibrations: Fluorimetry, Spectrometry and Logging techniques as well as direct uranium determination via assaying of large diameter hole samples. Limited information was available at the time in which to validate this historical data and confirmatory drilling implemented by Omega and Denison between 2005 and 2007, which generated reliable chemical assay data derived from pressed pellet XRF assays using methods named X75 and X79 (X79 for samples exceeding 4000ppm U₃O₈) and implemented following appropriate drilling and sampling techniques and QAQC protocols was deemed the most reliable data for the project.

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Given the limited number of confirmatory holes, the previous resource estimate relied heavily upon the use of historical data in order to provide enough data necessary for estimating resources over both deposits. As such, a detailed statistical analysis of historical indirect uranium data was undertaken in order to assess the reliability and validity of this data for use in resource estimations and it’s compatibility with the more reliable Omega and Denison assay data. The various drilling campaigns and sampling methods represented different sample supports and it was critical that their compatibility was assessed prior to resource estimation. Results from regression statistics indicated that there was no statistical differences between data derived from Fluorimetry, Spectrometry and Logging techniques when a modification factor was applied directly from the regression statistics and as such, data derived via these mediums was used in the previous estimations, in the absence of large amounts more recent, reliable data. In addition and a critical issue at the time, an investigation was undertaken to assess the grade distribution in un-sampled parts of historical holes situated within the mineralised zones.

Sixty percent of the historically probed hole intervals had no data recorded and these were arbitrarily set to 0.1ppm in the sample database and were commonly thought to be in areas where grade <250ppm had been intersected. This was a significant portion of the total data set within the mineralised envelopes. Therefore a simulation exercise was undertaken in order to generate reasonable values for un-sampled intervals at grades less than about 250ppm U₃O₈. These simulated values were checked and found to honour both the range and variability evident in the low grade samples in the drilling at the time. The low grade simulated values were found to better reflect the low grade portion of the statistical populations and provided a reasonable data set for variography and grade estimation.

Whilst these investigations enabled a certain degree of confidence to be applied to historical input data such that Inferred Resources could be classified for those parts of each resource estimated using only historical data, in the light of a significant amount of new gamma probe data derived from the recent drilling campaigns (2007-08), which included valid QAQC protocols and monitoring and which may be considered to represent the grade distribution of domains at both deposits in a spatial sense. This recent data supersedes most of the old historical data, being more reliable for use in resource estimation and which may facilitate the classifying of higher confidence resource categories.

Therefore, following a review of all data held for the project, grade data used in these resource estimation updates comprises all valid data from the recent drilling campaigns as well as chemical assay data from historic drilling campaigns undertaken by Omega/GeoQuest, but omits historical data from previous campaigns undertaken by Agip, see Table 17.3, in favour of more reliable recent data. Exceptions to this general rule are in the case of MIN2 at Mutanga and domains at Dibwe, discussed in the following sections.

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17.5.2 Statistical Analysis — Mutanga

17.5.2.1 Statistical Analysis — Drill Type

Following a review of interpreted domains, updated domain wireframes were used to flag the sample database and assign each U₃O₈ value to the domain in which it occurs. Statistical analysis was then undertaken on U₃O₈ grade populations within each domain in order to investigate the typical grade characteristics, variability and data skewness. Before undertaking statistical analysis by domain, descriptive statistics and histograms were generated for grade data by drill type, so as to confirm these data types as compatible for use in resource estimation. Tabulated statistics by drill type are shown below.

Recent drilling data (2007-08), comprising gamma data from RC and Diamond holes accounts for 77% of valid total project data and is considered to representative of the deposit, both spatially and in terms of the grade distribution. The grade populations from MTC, MTD and MRC holes exhibit broadly similar characteristics and have similar mean values (Table 17.10).

MGSC and MGSD holes show much higher average grades than other datasets, a function of these holes being drilled as close spaced holes in a high grade area of the deposit, for use in geostatistical analysis, therefore the high grade nature of these populations is expected and data from these holes is still valid for use in resource estimation since these holes define a localised, small volume of the resource and the influence these clustered, high grade samples will have on the overall resource estimate is small since grade interpolation parameters and the application of search distances during grade interpolation will essentially control the influence of these samples.

MDH and MR grade populations are somewhat higher grade than other datasets, however MDH holes, which represent 6% of total project data and total 15 holes, 13 of which occur in the MIN2 domain, do not have an undue effect on overall domain statistics in MIN2 and their influence is restricted to the MIN2 domain. The high grades exhibited by the MR hole population are unlikely to have a significant effect on the overall resource estimate since this data accounts for 4% of project data and total 11 holes.

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	Drill Type
							M
Statistics	MDH			MR			RC			SWD			MTC			MTD			MGSC			MGSD
Data Type	ASSAY			ASSAY			ASSAY			ASSAY			GAMMA			GAMMA			GAMMA			GAMMA
% of all data		6	%		4	%		13	%		2	%		29	%		25	%		15	%		8	%
Number		311			149			598			131			1306			1068			691			382
Minimum		9			18			0			0			1			0			39			19
Maximum		8,400			2,425			3,456			1,945			7,082			6,296			8,511			12,901

Mean		382.07			391.06			264.30			480.76			263.79			292.42			580.71			571.80
Median		156.50			236.00			144.00			312.00			151.00			143.00			232.00			225.00
Std Dev		789.31			461.79			410.32			423.62			417.32			505.53			952.27			1,147.87
Variance		623,011.95			213,248.07			168,358.74			179,456.40			174,154.03			255,560.40			906,811.63			1,317,601.19
Std Error		2.54			3.10			0.69			3.23			0.32			0.47			1.38			3.01
Coeff Var		2.07			1.18			1.55			0.88			1.58			1.73			1.64			2.01

Log Num		311.00			149.00			597.00			128.00			1306.00			1067.00			691.00			382.00
Geom Mean		182.02			244.42			156.83			340.62			166.02			164.44			299.36			279.20
Log Min		2.20			2.89			0.69			2.08			0.00			2.40			3.66			2.94
Log Max		9.04			7.79			8.15			7.57			8.87			8.75			9.05			9.47
Log Mean		5.20			5.50			5.06			5.83			5.11			5.10			5.70			5.63
Log S Dev		1.08			0.94			0.94			0.92			0.90			0.98			1.04			1.04
Log Var		1.17			0.89			0.89			0.85			0.82			0.95			1.08			1.07

Sichel Stats
Mean		325.09			377.58			243.63			518.29			249.59			264.65			511.33			475.20
V		1.16			0.88			0.89			0.85			0.82			0.95			1.08			1.07
Gamma		1.79			1.55			1.55			1.52			1.50			1.61			1.71			1.70

Percentiles
10		53.20			81.00			57.80			114.10			63.00			54.00			99.00			97.00
20		81.00			108.00			79.00			146.00			86.00			75.00			123.20			119.00
30		100.00			137.00			102.40			193.50			105.00			100.40			151.60			152.00
40		119.20			179.00			117.20			251.00			123.00			120.00			186.00			177.80
50		156.50			236.00			144.00			312.00			151.00			143.00			232.00			225.00
60		202.20			282.60			173.80			446.00			186.00			182.00			321.00			286.00
70		249.70			365.80			217.80			567.00			233.20			240.00			467.00			409.00
80		436.80			504.40			287.00			807.60			333.80			353.40			686.00			573.80
90		857.00			910.20			516.40			1,013.00			515.40			607.60			1,413.80			1,269.20
95		1,209.90			1,510.30			864.80			1,207.20			791.10			945.20			2,268.20			2,201.00
97.5		2,043.58			1,938.38			1,481.40			1,775.00			1,186.50			1,647.90			3,479.40			3,746.65
99		3,786.03			2,232.69			2,439.78			1,775.00			1,773.78			2,535.72			5,092.36			5,421.54

Table 17.10: Summary Statistics of Each Drill Type.

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17.5.2.2 Mutanga Domain Statistics

Descriptive statistics, histograms and probability plots were generated for all domains. A summary of raw data contained within each domain is contained in Table 17.11.


		Hole	No of		Data	No of
Domain	Drill Coverage	Type	Holes		Type	assays*
MIN1	50m × 50m, limited 5m × 50m coverage to N	SWD		12	ASSAY		16
		MRC		10	ASSAY		51
		MTC		3	GAMMA		18
		MTD		9	GAMMA		53
MIN2	50m × 50m plus two 10m spaced fence lines	SWD		51	ASSAY		65
		MRC		41	ASSAY		389
		MR		1	ASSAY		18
		MGSC		17	GAMMA		405
		MGSD		11	GAMMA		255
		MTC		26	GAMMA		257
		MTD		68	GAMMA		331
MIN3	50m × 50m plus two 10m spaced fence lines	MDH		12	ASSAY		229
		MR		8	ASSAY		124
		MRC		14	ASSAY		161
		MGSC		12	GAMMA		287
		MGSD		5	GAMMA		127
		MTC		24	GAMMA		352
		MTD		37	GAMMA		431
MIN4	50m × 50m	MDH		2	ASSAY		26
		MR		1	ASSAY		23
		MTC		45	GAMMA		545
		MTD		28	GAMMA		194
MIN5	50m × 50m, 100m × 50m at edge areas	MDH		1	ASSAY		3
		MTC		31	GAMMA		167
		MTD		19	GAMMA		136


*		“assay” refers to gamma derived U₃O₈ data and actual chemical assay U₃O₈ data where appropriate.

Table 17.11: Summary of Raw Data Contained Within Each Domain

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Descriptive statistics for raw data contained within each domain is contained in Table 17.12.


	DOMAIN
Statistics	MIN1		MIN2		MIN3		MIN4		MIN5
Number		137		1681		1787		774		303
Minimum		0		0		0		0		21
Maximum		2,191		12,901		8,400		2,361		4,245

Mean		185.44		490.26		347.54		197.79		220.71
Median		121.00		203.00		175.00		132.00		115.00
Std Dev		258.10		923.70		549.72		216.24		358.99
Variance		66,613.92		853,215.04		302,186.13		46,760.06		128,871.82
Std Error		1.88		0.55		0.31		0.28		1.19
Coeff Var		1.39		1.88		1.58		1.09		1.63

Log Num		135.00		1,674.00		1,785.00		773.00		303.00
Geom Mean		121.98		241.84		194.63		147.41		131.08
Log Min		0.00		0.00		0.69		3.18		3.05
Log Max		7.69		9.47		9.04		7.77		8.35
Log Mean		4.80		5.49		5.27		4.99		4.88
Log S Dev		0.97		1.09		1.01		0.71		0.92
Log Var		0.94		1.18		1.02		0.50		0.85

Sichel Stats
Mean		193.27		435.48		324.73		188.36		199.67
V		0.93		1.18		1.02		0.50		0.85
Gamma		1.58		1.80		1.67		1.28		1.52

Percentiles
10		50.40		74.00		61.00		62.00		44.00
20		64.80		105.20		89.00		84.80		59.60
30		82.50		130.00		112.00		102.00		74.00
40		103.00		160.00		142.00		116.00		99.00
50		121.00		203.00		175.00		132.00		115.00
60		136.20		257.60		225.00		164.00		143.00
70		168.50		369.70		295.90		192.00		181.10
80		203.80		557.00		417.60		245.20		254.00
90		349.10		1,046.20		736.30		373.00		467.90
95		512.30		1,962.70		1,197.30		517.20		694.05
97.5		710.80		3,213.35		2,022.53		747.80		1,169.20
99		1,349.39		5,102.76		2,819.11		1,142.58		1,699.94

Table 17.12: Descriptive Statistics by Drill Type — Mutanga

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17.5.2.3 Compositing

In order to ensure that all data values have a comparable influence on the data statistics, data compositing was undertaken by considering the histogram of sample intervals. Figure 17.17 below clearly shows the dominant sample interval for Mutanga data is 1m. Therefore domained data was composited to 1m down-hole intervals prior to further statistical analysis and top-cutting.

Since gamma data (which makes up the majority of grade data within each of the domains) was already composited to 1m intervals from the original data source, only chemical assay data was required to be composited.

Figure 17.17: Mutanga Sample Interval Histogram

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17.5.2.4 Top-Cuts

The grade distributions within each domain are positively skewed, exhibiting “tails” of high-grade data and commonly domains exhibit high grade outliers that influence the overall domains statistics. The degree of grade dispersion, or skewness is understood by considering the domain COV (coefficient of variation), which ranges from 1.09 to 1.88. A value of 1.0 would suggest a perfectly normal, unskewed distribution. It is important that a top-cut value is applied to extreme grade outliers so that these grades do not overly influence the statistics or result in undue bias towards high grades during grade interpolation. Several criteria are used to determine appropriate top-cuts, including domain COV, visual analysis of the histogram tail and consideration of the percentage of cut data for any given top-cut. At this stage, the MIN2 domain was sub-set in to two sub-domains (MIN2 and MIN2HG) so that the high grade portion of the deposit, defined exclusively by SWD drilling on the escarpment in the NW of the deposit could be domained out and estimated separately from the rest of the MIN2 domain.

Top-cut analysis was performed for each domain and is summarised in Table 17.13 below.


	Top									%			%
Top	Cut		Raw		%		Raw			data			U₃O₈
Cut	mean		mean		diff		COV		Considerations	cut			cut		Domain
									COV trigger,
800		170		185		-9		1.4	inflection/loss of metal-data balance		6			2	MIN1
									COV trigger,
									inflection/loss of
2,000		250		267		-6		1.9	metal-data balance		6			2	MIN2
									inflection/loss of
2,000		520		580		-10		1.4	metal-data balance		<1	%		8	MIN2_HG
									COV trigger,
									inflection/loss of
3,000		335		348		-2		1.6	metal-data balance		2			1	MIN3
									inflection/loss of
900		189		198		-4		1.1	metal-data balance		2			4	MIN4
									COV trigger,
									inflection/loss of
900		192		221		-13		1.6	metal-data balance		4			13	MIN5

Table 17.13: Top-cut Analysis Performed for Each Domain

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17.5.2.5 Mutanga Top-cut Domain Statistics

Following the application of top-cuts to data within each domain and after compositing the data to standard intervals, descriptive statistics and histograms were generated for each domain,

Descriptive statistics (Table 17.14) and histograms (Figures 17.18 to 17.23) for top-cut composite data are shown below.


	DOMAIN
Statistics	MIN1		MIN2		MIN2HG		MIN3		MIN4		MIN5
Number		136		1189		173		1711		764		300
Minimum		1		0		30		0		24		21
Maximum		800		2,000		2,000		3,000		900		900

Mean		170.64		249.68		520.57		334.78		189.02		191.76
Median		121.00		152.00		336.00		177.00		133.00		115.00
Std Dev		161.40		324.27		486.12		466.45		163.90		203.36
Variance		26,049.27		105,147.78		236,309.90		217,574.22		26,863.07		41,355.80
Std Error		1.19		0.27		2.81		0.27		0.22		0.68
Coeff Var		0.95		1.30		0.93		1.39		0.87		1.06

Log Num		136.00		1,186.00		173.00		1,709.00		764.00		300
Geom Mean		120.47		164.44		354.86		196.06		146.19		127.64
Log Min		0.00		0.00		3.40		0.69		3.18		3.05
Log Max		6.69		7.60		7.60		8.01		6.80		6.80
Log Mean		4.79		5.10		5.87		5.28		4.99		4.85
Log S Dev		0.93		0.86		0.89		0.99		0.68		0.87
Log Var		0.87		0.74		0.79		0.97		0.47		0.76

Sichel Stats
Mean		184.29		237.82		524.34		318.8		183.64		186.17
V		0.86		0.74		0.78		0.97		0.47		0.76
Gamma		1.53		1.45		1.48		1.63		1.26		1.46

Percentiles
10		52.20		66.00		130.00		63.00		62.40		44.00
20		69.20		92.80		149.60		92.00		84.80		59.00
30		88.60		110.00		209.80		113.00		102.00		74.00
40		104.40		128.00		251.00		142.00		115.00		98.00
50		121.00		152.00		336.00		177.00		133.00		115.00
60		136.60		181.00		446.00		226.00		16.00		142.00
70		165.00		222.00		567.90		296.00		192.00		181.00
80		210.60		276.00		811.00		420.80		246.00		251.00
90		372.20		491.10		119.00		732.70		370.60		470.00
95		515.40		825.40		1,775.00		1,174.35		518.40		683.00
97.5		711.40		1,345.28		1,953.10		1,933.05		750.80		900.00
99		800.00		2,000.00		2,000.00		2,720.59		99.00		99.00

Table 17.14: Mutanga Domain Statistics (Composite Data)

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17.5.3 Statistical Analysis — Dibwe

17.5.3.1 Statistical Analysis — Drill Type

Following a similar methodology to that discussed above for Mutanga, descriptive statistics and histograms were generated for Dibwe grade data by drill type. Significant new data for the deposit has provided more reliable and representative sample data than that used in historic resource estimates. This resource study has utilised data from the drilling campaign of 2007 (DRC holes) and all recent drilling data (DBC and DBD holes) over the deposit. Historical drilling data from DDH and DWD, which was used in the resource estimate of 2007, has not been used in this study.

Recent drilling data (2007-08), comprising gamma data from RC and Diamond holes accounts for 90% of valid total project data and is considered to representative of the deposit, both spatially and in terms of the grade distribution. The grade populations from DBC, DBD and DRC holes exhibit broadly similar statistical characteristics and have similar mean values and COV’s, therefore these three datasets are considered compatible for use in resource estimation work (Table 17.15).

Drill

Hole

No of

Domain

Sub-Domain

Coverage

Type

Holes

Data Type

assays*

5,6,7,8,10,11,12,18,19 and 22

50m × 100m

DRC

ASSAY

DBC

GAMMA

DBD

GAMMA

537

Central

2,3,4,9,13,14,15,16,17,20,21 and 24

50m × 100m

DRC

ASSAY

136

DBC

GAMMA

405

DBD

GAMMA

553

50m × 100m

DRC

ASSAY


*		“assay” refers to gamma derived U₃O₈ data and actual chemical assay U₃O₈ data where appropriate.

Table 17.15: Dibwe Raw Data by Domain and Drill Type

During resource estimation work carried out in December 2006, the Dibwe deposit was divided in to three fault bounded domains for resource estimation (Table 17.16). In the light of new data, the mineralised zone interpretation has been refined and mineralised zones are not as continuous throughout the deposit as was inferred from previous interpretation based on limited data. As such, a total of 23 individual mineralised zones have been interpreted with are semi-continuous along strike and reflect the fragmented and fractured nature of the mineralisation at Dibwe.

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	Drill Type
Statistics	DBC			DRC			DBD
Data Type	GAMMA			ASSAY			GAMMA
% of all data		26	%		10	%		64	%
Number		445			178			1,088
Minimum		12			0			0
Maximum		2,048			1,318			3,102

Mean		241.35			238.26			244.09
Median		154.50			157.00			166.00
Std Dev		257.22			242.45			248.56
Variance		66,161.21			58,779.55			61,784.24
Std Error		0.58			1.36			0.23
Coeff Var		1.07			1.02			1.02

Log Num		445.00			177.00			1,061.00
Geom Mean		168.97			146.05			175.12
Log Min		2.49			0.69			2.57
Log Max		7.63			7.18			8.04
Log Mean		5.13			4.98			5.17
Log S Dev		0.82			1.10			0.86
Log Var		0.68			1.21			0.74

Sichel Stats
Mean		237.37			266.16			253.25
V		0.68			1.20			0.74
Gamma		1.41			1.82			1.45

Percentiles
10		67.00			34.20			49.00
20		96.00			65.00			86.00
30		113.00			95.20			112.40
40		133.00			124.20			137.00
50		154.50			157.00			166.00
60		192.00			188.40			203.80
70		246.50			263.00			262.00
80		337.00			377.40			367.40
90		477.00			548.00			549.20
95		708.50			735.30			661.00
97.5		933.50			973.40			824.80
99		1,431.55			1,094.42			1,183.20

Table 17.16: Descriptive Statistics by Drill Type (Raw Data) — Dibwe

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17.5.3.2 Compositing

The sample database used for resource estimation at Dibwe contained assay and gamma data over 1m intervals. Therefore, no compositing was needed and the raw intervals of 1m are effectively the composite intervals.

17.5.3.3 Top-Cuts

Similar methodology as that described for Mutanga was applied to Dibwe data. Given the low number of samples that occur within each of the sub-domains 2-24 these did not prove useful for top-cut analysis and attempting to define an appropriate top-cut on such small datasets was not attempted, except for sub-domains 17+19 and 8 (which straddle a fault boundary) which required a top-cut and which contained a reasonable amount of sample data (59 and 147 respectively). Therefore, top-cut analysis was run on these two sub-domains, then on the remaining data in the SE and Central domain. The NW domain, comprising a single sub-domain (10) did not require a top-cut.

Top-cut analysis is summarised in the table below (Table 17.17). Although there are high grade outliers in the central and SE domains and it was felt these should be cut, the application of an appropriate top-cut for these domains has not changed the domain statistics significantly and this will therefore have little effect in the resource estimate.


	Top												%			Domain
Top	Cut		Raw		%		Raw			% data			U₃O₈			/Sub-
Cut	mean		mean		diff		COV		Considerations	cut			cut			domain
									COV trigger,
									inflection/loss of
750		249		312		-20		1.5	metal-data balance		5			20		17+19
									inflection/loss of
1200		301		315		-4		1.1	metal-data balance		1			4		8
									inflection/loss of
1660		239		240		-1		1.0	metal-data balance		<1	%		<1	%	central
									inflection/loss of
1350		235		236		-1		0.9	metal-data balance		<1	%		<1	%	SE

Table 17.17: Top-Cut Analysis

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17.5.3.4 Dibwe Top-cut Domain Statistics

Following the application of top-cuts to data within each domain, descriptive statistics and histograms were generated for each domain. Descriptive statistics (Table 17.18) and histograms (Figures 17.24 to 17.26) for top-cut composite data are presented below.


	Domain
Statistics	SE		CENT		NW
Number		601		1088		4
Minimum		13		0		37
Maximum		1,350		1,660		184

Mean		251.00		233.89		116.25
Median		166.00		162.00		104.00
Std Dev		229.30		226.41		62.14
Variance		52,577.29		51,262.14		3,861.58
Std Error		0.38		0.21		15.54
Coeff Var		0.91		0.97		0.54

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	Domain
Statistics	SE		CENT		NW
Log Num		601.00		1058.00		4.00
Geom		173.78		170.33		99.78
Log Min		2.57		1.79		3.61
Log Max		7.21		7.42		5.22
Log Mean		5.16		5.14		4.60
Log S Dev		0.88		0.85		0.00
Log Var		0.77		0.73		0.00

Sichel Stats
Mean		255.25		245.17		120.73
V		0.77		0.73		0.37
Gamma		1.47		1.44		1.21

Percentiles
10		58.00		49.00		37.00
20		89.00		86.00		37.00
30		112.30		112.00		50.40
40		135.00		137.00		77.20
50		166.00		162.00		104.00
60		205.00		196.80		118.40
70		269.40		255.00		132.80
80		392.80		348.40		148.80
90		585.50		501.00		166.40
95		725.25		656.80		175.20
97.5		859.95		839.80		179.60
99		1,079.95		1,220.80		182.24

Table 17.18: Dibwe Domain Statistics (Composite Data)

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Figure 17.26: Dibwe NW Domain Histogram (Composite Data)

17.6 In Situ Dry Bulk Density Statistics

During the recent drilling campaign no new sample data was collected for further bulk density analysis, therefore the information collated in December 2006 remains current and is described here.

A program of density determination was completed from the PQ core available from the Mutanga metallurgical drill hole program during. A total of 97 core samples from 12 holes were selected as being geologically representative of the material drilled. The core was dried and density determined by calculating the core volume which was then divided into the weighed dry mass to calculate the in situ dry bulk density. The mean and median density values are 2.1 tonnes per cubic metre. The distribution has a low variance (tight distribution, Figure 17.27). CSA recommend a global density of 2.1 be applied to for estimation of the Mutanga and Dibwe Mineral Resources (Table 17.19).

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Summary Stats — Bulk Density Data
Details	From		To		Dia		Length		Volume(l)		Mass(gm)		Density
Number		97		97		97		97		97		97		97
Minimum		1.1		1.3		81.9		96.0		0.53		1,010.00		1.82
Maximum		53.8		54.0		85.2		208.0		1.16		2,536.00		2.30

Mean		22.6		22.8		83.8		188.7		1.04		2,188.21		2.10
Median		20.9		20.9		84.0		197.6		1.09		2,277.00		2.10
Std Dev		13.5		13.5		0.7		24.0		0.13		305.11		0.09
Variance		182.0		182.2		0.5		574.2		0.02		93,089.79		0.01
Std Error		0.1		0.1		0.0		0.2		0.00		3.15		0.00
Coeff Var		0.6		0.6		0.0		0.1		0.13		0.14		0.04

Percentiles
10		5.9		6.1		82.8		153.0		0.85		1,603.80		2.00
20		10.0		10.1		82.9		188.8		1.01		2,120.40		2.04
30		13.2		13.4		83.6		193.8		1.06		2,220.00		2.06
40		16.7		16.9		83.9		196.2		1.07		2,237.60		2.08
50		20.9		20.9		84.0		197.6		1.09		2,277.00		2.10
60		24.8		25.0		84.1		198.5		1.10		2,298.80		2.12
70		29.7		29.9		84.3		199.2		1.11		2,319.80		2.13
80		34.6		34.8		84.5		200.6		1.11		2,343.60		2.16
90		42.5		42.7		84.7		202.7		1.12		2,409.20		2.21
95		46.7		46.9		84.7		204.4		1.13		2,480.00		2.25
97.5		50.1		50.3		84.8		205.1		1.14		2,512.35		2.27
99		50.8		51.0		85.1		207.0		1.15		2,536.00		2.30

Table 17.19: Bulk Density Data

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Figure 17.27: Bulk Density Data Distribution

17.7 Variography

A variography study was completed using the current composite datasets to determine the spatial correlation between samples at both deposits, to be used for grade estimation using ordinary kriging equations.

17.7.1 Mutanga — Variography

Variography was attempted for all domains using current composite grade data. Domains MIN1, MIN2HG and MIN5 contain insufficient data for meaningful variograms to be modelled and reliable directions of grade continuity could not be established. Variography performed on domains MIN2 and MIN3 produced more reliable variograms for the first two continuity directions, although poor in the third direction. Details of variography from the MIN2 and MIN3 domains are tabulated below, (Table 17.20).

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	Nugget		Continuity
Domain	(%)		Direction	Dip (^O)		Azi(^O)		Range (m)
MIN2		25	DIR1		12		126		50
			DIR2		0		216		20
			DIR3		78		306		15
MIN3		28	DIR1		0		036		50
			DIR2		0		126		25
			DIR3		90		306		15

Table 17.20: Variography from the MIN2 and MIN3 Domains

The close spaced drilling (CSD) undertaken during the recent drilling campaign over a 200m × 200m portion of the deposit straddling domains MIN2 and MIN3 (see Figure 17.11 and Figure 17.28 below) provides useful data with which to model variography using a close spaced dataset, that may be more representative of grade continuity over both domains. Accordingly, variograms were modelled using this data, which resulted in well behaved variograms that described the grade continuity directions and ranges reliably and which honour the general strike and dip of the mineralised zones in these domains.

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Figure 17.28: Close Spaced Drilling used for Geostatistical Analysis

The modelled nugget effect is low to moderate at about 20% of the total variability. Ranges extend further along the dip direction than the strike direction and the models honour the shallow dip of mineralisation to the SW (6^o) and shallow dip to the SE (6^o).

Details of variography from close spaced drilling is tabulated below (Table 17.21). Variogram plots for the down-hole variogram and continuity directions are shown in Figures 17.29 to17.32. Variability is scaled on the y axis, against the range in metres on the x axis.

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Figure 17.32: Close Spaced Drilling, Direction 3 Variogram

In order to test the robustness of these variogram models for use in the Kriging equations, a cross validation exercise was performed using the three variogram models, applied to domains MIN2 and MIN3 in order to see whether one model is more reliable at describing the grade continuity parameters than the others. The cross validation exercise methodology was to remove a composite data value from the population and use the surrounding values to estimate the removed grade. The resulting value is then compared to the estimate. The total average estimates are then compared to the actual estimates and if the variogram model is robust, the figures should be very close. The average error statistic should be close to zero and the standard deviation of the error statistic should be close to one. The table below summarises the results of the cross validation exercise (Table 17.22).

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	Variogram
Domain	Model	Error Statistic		SD
MIN2	MIN2		0.00127		0.433
	CSD		0.00199		0.420
MIN3	MIN3		0.00246		0.710
	CSD		0.00204		0.700
MIN1	CSD		0.000555		0.140
MIN2HG	CSD		-0.0364		0.57
MIN4	CSD		-0.000074		0.210
MIN5	CSD		0.00103		0.330

Table 17.22: The Results of the Cross Validation Exercise

Results from this work show there is little difference between the domain variography and CS variography for domains MIN2 and MIN3 and although the SD’s appear relatively low, the very small error statistics are a good result. The ranges determined through the CSD variography are longer than those defined by the MIN2 and MIN3 variography and these variogram parameters are considered more robust for use in the kriging equations.

Therefore, the CSD variogram model was applied not only to the MIN2 and MIN3 domains, but to other domains for which variogram parameters could not be modelled, i.e. all domains.

During the grade interpolation stage, Kriging was initially undertaken into blocks of the MIN2 and MIN3 domains using the MIN2 and MIN3 variogram model. The Kriging process was then re-run using the CSD variogram model. The overall block Kriging variance using the CSD variogram model was lower than the variance using the domain variogram models. This outcome goes some way to validating the choice of variogram model.

17.7.2 Dibwe Mineralisation U₃O₈ Variography

Although the dataset for the Dibwe deposit is significantly larger than in December 2007, the current drill hole spacing of 100m × 50m is still not sufficient to describe the grade continuity throughout the deposit and the narrow and highly fragmented and fractured nature of the mineralised zones within the deposits coupled with thee observed high variability in U₃O₈ throughout

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the deposit make modelling grade continuity difficult. Therefore, the CSD variogram model was tested on Dibwe domain data (resulting in an error statistic of 0.000594 and SD of 0.30 when applied to the Dibwe Centre domain and -0.00179 and 0.30 for the Dibwe SE domain. The CSD model parameters were applied to Dibwe for the purposes of grade estimation.

17.8 Grade Estimation

U₃O₈ grades were estimated into a block model for each deposit, constructed to honour the interpreted mineralised zones and the surface topography. Blocks within each model were coded by the relevant domains using the domain wireframes and then constrained to the surface topography. Blocks situated above the topographic surface were deleted. Adequate waste was built into the block models to ensure that they were suitable for open pit optimisation and mine planning. To speed up processing time, waste blocks were filtered out of each block model prior to grade interpolation and then re-merged into the block file after grades were assigned to each model.

Ordinary Kriging was used to estimate U₃O₈ based on the modelled variogram parameters. Inverse Distance squared estimation was completed as a comparison with the Kriged estimate.

The grade interpolation strategy for both deposits involved setting up search parameters in a search ellipse for each domain, which was then aligned to the geometry of each domain. A series of grade interpolation “runs” were then completed, at progressively larger search distances until all blocks received an interpolated grade. Constraints were applied to the number of grade values and holes used in the interpolations in order to improve the reliability of the estimates.

Upon completion of grade estimation for both deposits, a series of block model validations were completed to test the robustness of each estimate.

17.8.1 Mutanga Grade Estimation

17.8.1.1 Mutanga Block Model Construction

A sub celled block model was constructed from the wireframes defining the mineralised envelope and topographic surface. The model dimensions are presented in Table 17.23.

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SEARCH ELLIPSE PARAMETERS MIN1


	Run 1		Run 2		Run 3		Run 4
AZI/PLUNGE		205/3		205/3		205/3		205/3
DIP		5		5		5		5
RADII 1 RANGE		35		50		100		200
RADII 2 RANGE		50		75		150		300
RADII 3 RANGE		3		10		20		40
Min samples per estimate		5		3		1		1
max samples per estimate		20		20		20		20
min hole per estimate		3		3		1		1

SEARCH ELLIPSE PARAMETERS MIN2


	Run 1		Run 2		Run 3		Run 4
AZI/PLUNGE		216/0		216/0		216/0		216/0
DIP		6		6		6		6
RADII 1 RANGE		35		50		100		200
RADII 2 RANGE		50		75		150		300
RADII 3 RANGE		3		10		20		40
Min samples per estimate		5		3		1		1
max samples per estimate		25		25		25		25
min hole per estimate		3		3		1		1

SEARCH ELLIPSE PARAMETERS MIN2HG


	Run 1		Run 2		Run 3		Run 4
AZI/PLUNGE		230/0		230/0		230/0		230/0
DIP		10		10		10		10
RADII 1 RANGE		35		50		100		200
RADII 2 RANGE		50		75		150		300
RADII 3 RANGE		3		10		20		40
Min samples per estimate		5		3		1		1
max samples per estimate		20		20		20		20
min hole per estimate		3		3		1		1

SEARCH ELLIPSE PARAMETERS MIN3


	Run 1		Run 2		Run 3		Run 4
AZI/PLUNGE		240/0		240/0		240/0		240/0
DIP		5		5		5		5
RADII 1 RANGE		35		50		100		200
RADII 2 RANGE		50		75		150		300
RADII 3 RANGE		3		10		20		40
Min samples per estimate		5		3		1		1
max samples per estimate		20		20		20		20
min hole per estimate		3		3		1		1

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SEARCH ELLIPSE PARAMETERS MIN4


	Run 1		Run 2		Run 3		Run 4
AZI/PLUNGE		240/0		240/0		240/0		240/0
DIP		5		5		5		5
RADII 1 RANGE		35		50		100		200
RADII 2 RANGE		50		75		150		300
RADII 3 RANGE		3		10		20		40
Min samples per estimate		5		3		1		1
max samples per estimate		20		20		20		20
min hole per estimate		3		3		1		1

SEARCH ELLIPSE PARAMETERS MIN5


	Run 1		Run 2		Run 3		Run 4
AZI/PLUNGE		240/0		240/0		240/0		240/0
DIP		5		5		5		5
RADII 1 RANGE		35		50		100		200
RADII 2 RANGE		50		75		150		300
RADII 3 RANGE		3		10		20		40
Min samples per estimate		5		3		1		1
max samples per estimate		20		20		20		20
min hole per estimate		3		3		1		1

Table 17.24: Grade Estimation Search Ellipse and Sample Parameters

Octant searching was not used. Grades were interpolated into parent cells so that sub-cells were assigned the value of their parent cell, to reduce adverse volume variance issues. Grades were interpolated into the model using the first run. Blocks which did not receive an interpolated grade were then used in successive runs until all blocks were populated.

17.8.1.3 Mutanga Model Validation

Once the grade estimates were completed, a series of model validations were completed to test the robustness of the estimate. These included:

	•		Comparison of average composite grade with average block grade for each domain.

	•		Swath plots of grade trends in depth, northing and easting.

	•		Visual validation of composite grades with block grades, throughout the deposit.

	•		Comparison of domain wireframe volumes with block volumes.

	•		Comparison of IDW estimate with the OK estimate.

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The comparison of average composite grades with block model grades is contained in Table 17.25.


	Block U₃O₈		De-clustered		Difference
Domain	(ppm)		composite U₃O₈ (ppm)		(%)
MIN1		136		146		-7.0
MIN2		344		321		5.7
MIN2HG		522		521		0.3
MIN3		332		335		-2.1
MIN4		189		182		-0.7
MIN5		196		192		-1.5
ALL		279		271		2.9

Table 17.25: Comparison of Average Composite Grades with Block Model Grades

The comparison of de-clustered composite grades and block model grades shows that the input and output data compare well. The exception is in domain MIN1 which contains relatively few data points and grades within this domain appear more smoothed than the rest of the model.

Swath plots showing grade trends in depth, northing and easting in each domain, are contained in Figures 17.33 to 17.38.

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The swath plots clearly show that the trends observed in the composite data sets for each domain are honoured by the block grade data, but with a degree of smoothing, which is to be expected with any grade estimation. In domains with relatively few data points (e.g. MIN1), the trends are less evident and the degree of smoothing greater. Local estimates of block grade within the MIN1 domain are likely to be less reliable than for other domains and as such, block grades above a cut-off are likely to be highly variable.

Visual validations were undertaken by reviewing slices through the block model and comparing composite grades to block grades by domain. Screenshots of domain slices are contained in Figures 17.39 to 17.43.

Figure 17.39: NW-SE Cross Section Through MIN1

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The cross sections through each domain indicate that block grades honour the general sense of the composite grades.

Wireframe volumes were compared to domain block volumes to ensure these are honoured and that the tonnage estimate is reliable. This Comparison is summarised in Table 17.26. Results from this comparison show that the difference between the wireframe volume and block model volume is negligible.


	Wireframe		Block Model		Difference
Domain	Volume (m3)		Volume (m3)		(%)
MIN1		223,761		222,968		-0.354
MIN2		2,104,117		2,104,394		0.013
MIN2HG		89,658		89,194		-0.517
MIN3		3,374,440		3,370,704		-0.111
MIN4		2,086,381		2,086,344		-0.002
MIN5		830,386		830,628		0.029

Table 17.26: Wireframe Volumes Compared to Domain Block Volumes

At the completion of the kriged estimate, the estimate was run again using the Inverse Distance Weighting (IDW) interpolation method, raised to the second power. The input data, search parameters and interpolation strategy were identical to the kriged model except that variography was not used. IDW estimates differ from kriged estimates in that they assume a zero nugget; nevertheless they are useful comparative estimates. These two estimation methods are compared in the following table (Table 17.27).

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	OK		IDW2
Material	U₃O₈ ppm		U₃O₈ ppm		diff %
ALL		279		281		-0.6
ALL>100ppm		287		290		-0.7
MIN1		136		127		-3.4
MIN2		344		336		1.0
MIN2HG		522		519		0.6
MIN3		332		331		-0.8
MIN4		189		187		-3.2
MIN5		196		189		-0.1

Table 17.27: Comparison of Mutanga OK Model and IDW2 Model

It is concluded from the validations performed on the Mutanga resource model, that the estimate of tonnage and grade can be considered reliable, robust and honours the input data used in its creation.

17.8.2 Dibwe Grade Estimation

17.8.2.1 Dibwe Block Model Construction

A sub celled block model was constructed from the wireframes defining the mineralised envelopes and topographic surface. The model dimensions are presented in Table 17.28.


Parameter	Minimum		Maximum
Easting Range		652,990m		655,510m
Northing Range		184,240m		186,520m
Elevation		440m		610m
Easting Block Size		20m		2m
Northing Block Size		20m		2m
Elevation Block Size		5m		0.5m

Table 17.28: Dibwe Block Construction Parameters

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SEARCH ELLIPSE PARAMETERS SE DOMAIN


	Run 1		Run 2		Run 3		Run 4
AZI/PLUNGE		046/0		046/0		046/0		046/0
DIP		9		9		9		9
RADII 1 RANGE		100		150		300		450
RADII 2 RANGE		65		100		200		300
RADII 3 RANGE		7		10		20		30
Min samples per estimate		5		5		5		1
max samples per estimate		20		20		20		20
min hole per estimate		3		3		1		1

SEARCH ELLIPSE PARAMETERS CENTRAL DOMAIN


	Run 1		Run 2		Run 3		Run 4
AZI/PLUNGE		052/2		052/2		052/2		052/2
DIP		9		9		9		9
RADII 1 RANGE		100		150		300		450
RADII 2 RANGE		65		100		200		300
RADII 3 RANGE		7		10		20		30
Min samples per estimate		5		5		5		1
max samples per estimate		20		20		20		20
min hole per estimate		3		3		1		1

SEARCH ELLIPSE PARAMETERS NW DOMAIN


	Run 1		Run 2		Run 3		Run 4
AZI/PLUNGE		065/0		065/0		065/0		065/0
DIP		0		0		0		0
RADII 1 RANGE		100		150		300		450
RADII 2 RANGE		65		100		200		300
RADII 3 RANGE		7		10		20		30
Min samples per estimate		5		5		5		1
max samples per estimate		20		20		20		20
min hole per estimate		3		3		1		1

Table 17.29: Grade Estimation Search Ellipse and Sample Parameters

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17.8.2.3 Dibwe Model Validation

As for Mutanga, once the grade estimates were completed, the model validations were undertaken and are described below. The comparison of average composite grades with block model grades is contained in the following table (Table 17.30).


	Block		De-Clustered
	U₃O₈		composite U₃O₈
Domain	(ppm)		(ppm)		Difference (%)
SE		242		235		+3.0
CENTRAL		231		235		-2.0
NW		133		139		-4.0

Table 17.30: Comparison of Average Composite Grades with Block Model Grades

De-clustered mean composite grades compare favourably with average block grades for each domain. Swath plots showing grade trends in depth, northing and easting in each domain are contained in Figure 17.44.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

The entire wireframe volume, comprising the 23 mineralised zones was compared to the block volume to ensure the wireframe model is honoured and that the tonnage estimate is reliable. This Comparison is summarised in Table 17.31. Results from this comparison show that the difference between the wireframe volume and block model volume is negligible.

Wireframe

Block Model

Difference

Domain

Volume (m3)

(%)

ALL

8,423,537

8,383,616

-0.40

Table 17.31: Wireframe Volume, Compared to the Block Volume

At the completion of the kriged estimate, the estimate was run again using the Inverse Distance Weighting (IDW) interpolation method, raised to the second power. The input data, search parameters and interpolation strategy were identical to the kriged model except that variography was not used. IDW estimates differ from kriged estimates in that they assume a zero nugget, nevertheless they are useful comparative estimates. These two estimation methods are compared in Table 17.32.

IDW2

U₃O₈

Material

ppm

diff %

ALL

234

236

-0.8

Table 17.32: Comparison of Mutanga OK Model and IDW2 Model

It is concluded from the validations performed on the Dibwe resource model, that the estimate of tonnage and grade can be considered reliable, robust and honours the input data used in its creation.

17.9 Mineral Resource Reporting

The Mineral Resource Estimate as at 30 December 2008 presented in this document has been estimated and classified according to recommendations in the CIM Definitions Standards and in accordance with the rules of NI43-101. Classification of a Mineral Resource requires consideration of both the reliability of the sample data and other data used in the estimate, coupled with knowledge of the host geology.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

17.9.1 Classification of the Mutanga and Dibwe Mineral Resource Estimates

Confidence criteria used to classify interpolated blocks includes:

	•		Interpolation criteria based on sample density, variography, search and interpolation parameters.

	•		Assessment of the reliability and confidence that can be given to geological, sample, survey and bulk density data used in modelling

	•		Robustness of the geological model.

	•		Drilling and sample density.

Recent drilling at Mutanga has tightened the drilling grid to 50m × 50m centres, which has allowed the geometry of deposit domains to be refined. In addition, good variography has provided reliable directions and ranges of grade continuity over the deposit. Results from the variography study indicate the ranges of grade continuity to be 75m in the strike direction and 50m in the dip direction. This base range is sufficient to define Indicated Resources. Blocks which received an interpolated grade during the first run (being informed by at least 5 samples from at least 3 drill holes, at search ranges less than the base range) were classified as Measured Resources. Measured Resources are located in the area of close spaced Geostatistical drilling, within domains MIN2 and MIN3. Blocks that received an interpolated grade during run2 (at distances equal to the range), and form a contiguous volume were classified as Indicated Resources. Those blocks within the model that were captured during interpolation runs 3 and 4 were classified as Inferred Resources. In addition to these criteria, all blocks within the MIN1 domain are classified as Inferred Resources by virtue of the lack of sample data within this domain. All MIN2HG blocks are also classified as Inferred Resources since this domain occupies the escarpment on the NW edge of the deposit where topographic error is at its highest.

Future upgrade of defined Mineral Resources requires:

	1.		Improvements in the accuracy of the topographic surface DTM (currently +/-2.5m).

	2.		Infill drilling to improve geological and grade continuity so as to increase the confidence that can be applied to the classification of Mineral Resources.

	3.		More QAQC data. This is required to further confirm the validity of gamma data used in the resource estimations.

	4.		More bulk density data. This is required from each of the domains, in order to improve the tonnage estimate.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

The figure below (Figure 17.48) shows the Mutanga Block Model, coloured by resource class (magenta = Measured, red=Indicated, blue=Inferred).

Figure 17.48: Mutanga Resource Model Coloured by Resource Class.

At Dibwe, recent drilling has brought the drilling grid in to 100m × 50m centres, which has allowed the geological model to be improved and the geometry of deposit to be modified. Recent infill drilling defines the mineralised zones as narrow, semi-continuous, geologically and structurally controlled zones within the three fault bounded domains. Infill drilling has allowed a degree of grade continuity to be established over the deposit though local grade variability remains high. Geological and grade continuity is established to a level sufficient to classify resources over the deposit as Inferred Resources only.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

No resources were classified as Indicated Resources due to:

	•		The current drill spacing is not adequate to establish geological and grade continuity along strike, to the level required to classify Indicated Resources.

	•		Additional assay QAQC data is required in order to validate the use of gamma probe data in resource estimation work at Dibwe.

	•		Deposit specific variography has not been undertaken at Dibwe. In order to increase the confidence in the resource estimate, valid directions and ranges of grade continuity need to be established using Dibwe domain data.

17.9.2 Mineral Resource Tabulations

U₃O₈

Lower

Measured

Indicated

Inferred

Cut-off

Tonnes

U₃O₈

Tonnes

U₃O₈

Tonnes

U₃O₈

Deposit

(ppm)

(Mt)

(ppm)

(Mlbs)

(Mt)

(ppm)

(Mlbs)

(Mt)

(ppm)

(Mlbs)

Mutanga

100

1.88

481

1.99

8.4

314

5.82

7.2

206

3.3

Dibwe

100

—

17.0

234

9.0

Total

1.88

481

1.99

8.4

344

5.82

24.2

226

12.3

Table 17.33: Updated Mineral Resource Estimates for Mutanga and Dibwe (2008).

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


	U₃O₈
	Lower
	Cut-		Measured						Indicated						Inferred
	off		Tonnes		U₃O₈		U₃O₈		Tonnes		U₃O₈		U₃O₈		Tonnes		U₃O₈		U₃O₈
Deposit	ppm		(Mt)		ppm		(Mlbs)		(Mt)		ppm		(Mlbs)		(Mt)		ppm		(Mlbs)
Mutanga		100		1.88		481		1.99		8.4		314		5.82		7.2		206		3.3
Mutanga Ext*		200														0.5		340		0.4
Mutanga East*		200														0.2		320		0.1
Mutanga West*		200														0.5		340		0.4
Dibwe		100								—		—		—		17.0		234		9.0

*Total*				*1.88*		*481*		*1.99*		*8.4*		*344*		*5.82*		*25.4*		*231*		*13.2*


*		Resources for Mutanga Ext, Mutanga East and Mutanga West have not been updated in 2008 and remain current.

Table 17.34: Mutanga Project — Summary of Current Resources as at December 2008

17.9.3 Comparison to previous estimates

The recently completed resource estimate (Tables 17.33 and 17.34, Figures 17.49 and 17.50) was compared to that reported in 2006 (Table 17.2) and this comparison is detailed below. It should be noted that a direct comparison can only be made between that part of the resource termed Mutanga in the 2006 estimate and the recent Mutanga estimate. Mutanga Extensions, Mutanga East and Mutanga West resource areas were not included in the 2008 mineral estimate update but remain current.

The 2006 estimate of resources quotes the Mutanga resource as 7.0Mt at a grade of 400ppm U₃O₈, totalling 6.2Mlbs of U₃O₈, at a 200ppm cut-off. The entire resource was classified as Inferred Resources.

Following infill drilling at Mutanga, the new resource estimate, at a 100ppm lower cut-off is 17.51Mt @ 287ppm U₃O₈ for a total of 11.1Mlbs U₃O₈. This estimate contains 150% moretonnes, at a 28% reduced grade, for a 79% increase in contained uranium compared to that which was reported by CSA in December 2006. In addition and as a result of recent infill drilling, 18% of the estimated resource tonnage is now classified as Measured Resources (11% of resource uranium lbs), 52% as Indicated Resources (48% of uranium lbs) and 30% Inferred Resources (41% of uranium lbs). Following infill drilling at Dibwe, the resource estimate, at a lower cut-off of 100ppm is 17.04Mt @ 239ppm U₃O₈ for 8,967,000lbs U₃O₈. This estimate contains 107% more tonnes, at a 35% reduced grade for a 36% increase in contained uranium compared to the December 2006 model.

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At Mutanga and Dibwe, the significant tonnage increase and grade reduction is as a result of the decision to reduce the cut-off grade from 200ppm (as was used in 2006) to 100ppm following mineral extraction improvements and upgrades which has allowed lower grade mineralization to become economical. Using a 100ppm cut-off has added significant tonnage, diluting the overall grade.

Some additional tonnage can be attributed to the delineation of an additional zone of mineralization at Mutanga, MIN5 that had not been defined in early drilling campaigns. Infill drilling has also allowed the MIN4 domain to be extended by 250m to the NE. Deposit edges have been refined following additional drilling.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

18.0 OTHER RELEVANT DATA AND INFORMATION

18.1 De-mining and UXO Program

In April 2006 a team from MineTech International (MTI) commenced a Level 1 General Mine Action Assessment Survey of the Mutanga camp, proposed Mutanga open pit and plant site areas. The purpose of the assessment was to provide general information and advice to mitigate any risk of landmines or unexploded ordinance (UXOs) to staff, vehicles and equipment engaged in geological prospecting.

In addition to this campaign, Denison completed another two during 2008. The clearing operations located rocket propelled grenades and casings, an anti tank mine and numerous projectiles (i.e. bullets).

Further clearance work is required along the Zyiba Meenda Road as this is the proposed route for the site access road.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

19.0 INTERPRETATION AND CONCLUSIONS

The resource estimates completed in 2006 for the Mutanga and Dibwe deposits were estimated at a 200ppm U₃O₈ lower cut-off grade and classified as Inferred due to the limited understanding of geological continuity, low drilling density and uncertainty surrounding the relationship between the different assay and radiometric methods used to determine the sample U₃O₈ grades. The 2006 resource was not considered for upgrading to the Indicated category due to uncertainty surrounding absolute U₃O₈ grades and low confidence in the local grade estimations, the requirement for clarification on down hole gamma logger grades, the need for increased understanding of the geological controls on mineralisation and mineralogy and the specific locations of the in-situ dry density determinations.

A series of recommendations were outlined by CSA following the 2006 resource estimate, designed to facilitate the upgrade of Inferred Resources to Indicated Resources. These are summarised below:

•		Complete infill RC and diamond drilling at both deposits and combine this work with mapping and geological interpretation, so as to continue to enhance the understanding of the geological and structural controls on U₃O₈ mineralisation.

•		Complete test work to ensure the cheaper and more effective down hole gamma logging technology can be used to determine down hole U₃O₈ equivalent grades, with the aim of reducing the reliance on time consuming and expensive off-site assay methods.

•		Continue to develop an understanding of the mineralogy, metallurgical and communition properties of the potential U₃O₈ ore bearing material by completion of representative metallurgical core drilling and sampling programs.

•		Collect additional in-situ dry bulk density data for both the potential ore and surrounding waste material for both Mutanga and Dibwe, so as to improve the tonnage estimate.

Accordingly, the recent drilling (post 2006) campaigns were implemented and steps taken to address the issues and sensitivities outlined in the 2006. A Mutanga, infill drilling on a 50m x 50m grid was completed whilst at Dibwe, 50m infill on 100m spaced cross sections was completed.

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In order to validate the use of gamma data in resource estimation, check sampling was undertaken of drill material and sent for chemical assay. QAQC analysis of chemical assay data concludes:

	•		Blanks submitted all performed very well with all samples reporting below detection. This suggests that field sampling methods and contamination-limiting procedures at SGS are adequate.

	•		Results from the submission of external field standards was mixed.

	•		Results from internal standards (UREM) was poor overall. Six out of seven standards reported within ±10% of their certified values, but the average percentage error was 11% outside the expected value.

	•		Although not available at the time the QAQC review was completed, at the time of reporting, spreadsheet data for additional internal laboratory standard reference material, blanks and duplicate samples was received and reviewed. This data suggests internal laboratory QAQC practises to be adequate, but follow up on erroneous UREM samples is recommended. Ongoing monitoring of internal laboratory control alongside external control is highly recommended as part of future drilling programs and should be implemented as a matter of course.. A set of pulp duplicates should be submitted to an umpire laboratory which can then be analysed alongside SGS samples, also testing laboratory precision.

	•		The number of QAQC samples submitted overall was low (91) and it is advisable that in future drilling campaigns, this number should be increased to be more representative. It is highly advisable that, as a matter of course, QAQC data should be analysed concurrently with drilling. By doing this, if issues arise, it allows for the laboratory to be consulted, samples re-assayed and procedures reviewed if necessary, resulting in problems being resolved at the time and prevented for the rest of the campaign.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

The recent chemical assay QAQC program to validate gamma data against assay data did not return assay grades from all grade ranges exhibited by gamma probe data, and so is considered sub-optimal. Given that comparison on an interval by interval basis could not be undertaken, a more valid approach is to use the comparison of overall population statistics from all assay data and all gamma data, to assess the validity of gamma data for use in resource estimation. It was this approach that was adopted.

The number of recent check assays with which to validate the large amount of gamma data generated during the recent infill drilling campaign is low. In order to increase the level of confidence that can be applied to the indirect method of uranium grade calculation via gamma probing which in turn influences the overall classification of resources, it is recommended that additional check assaying be undertaken, particularly at Dibwe, that ensures not only that returned assays are representative of all grade ranges estimated by gamma probing, but also spatially representative.

The close spaced drilling (CSD) undertaken during the recent drilling campaign over a 200m × 200m portion of the deposit straddling domains MIN2 and MIN3 (see Figure 17.11 and Figure 17.28) provides useful data with which to model variography using a close spaced dataset, that may be more representative of grade continuity over both domains. Accordingly, variograms were modelled using this data, which resulted in well behaved variograms that described the grade continuity directions and ranges reliably and which honour the general strike and dip of the mineralised zones in these domains.

Although the updated topographic surface is an improvement over historical data held, the 5m contoured data does not include spot heights and as such, topographic highs are shown as flat contours resulting in potential elevation inaccuracies, especially at relatively high levels. Draped collar elevations are accurate to +/- 2.5m at lower levels and +/- 5.0m at higher elevations. It is recommended that spot height data be sourced (from which the contoured surfaces were created) and topographic DTM surfaces be refined using this data, prior to future resource updates.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

It is concluded from the validations performed on the Mutanga resource model, that the estimate of tonnage and grade can be considered reliable and robust and honours the input data used in its creation.

The Mutanga and Dibwe resource estimates have been classified using CIM guidelines and in accordance with the rules of NI43-101. Confidence criteria used to classify interpolated blocks includes:

	•		Interpolation criteria based on sample density, variography, search and interpolation parameters.

	•		Assessment of the reliability and confidence that can be given to geological, sample, survey and bulk density data used in modelling.

	•		Robustness of the geological model.

	•		Drilling and sample density.

Future upgrade of defined Mineral Resources requires:

Improvements in the accuracy of the topographic surface DTM (currently +/-2.5m).

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

	2.		Infill drilling to improve geological and grade continuity so as to increase the confidence that can be applied to the classification of Mineral Resources.

	3.		More QAQC data. This is required to further confirm the validity of gamma data used in the resource estimations.

	4.		More bulk density data. This is required from each of the domains, in order to improve the tonnage estimate.

These sensitivities should be considered when planning additional resource definition drilling to upgrade parts of the resource to higher categories.

Geological and grade continuity is established to a level sufficient to classify resources over the deposit as Inferred Resources only. No resources were classified as Indicated Resources due to:

	1.		The current drill spacing is not adequate to establish geological and grade continuity along strike to the level required to classify Indicated Resources.

	2.		Additional assay QAQC data is required in order to validate the use of gamma probe data in resource estimation work at Dibwe.

	3.		Deposit specific variography has not been undertaken at Dibwe. In order to increase the confidence in the resource estimate, valid directions and ranges of grade continuity need to be established using Dibwe domain data.

These sensitivities should be considered when planning additional resource definition drilling to upgrade parts of the resource to higher categories.

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20.0 RECOMMENDATIONS

The current resource estimates for Mutanga and Dibwe are considered reliable, robust and suitable for inclusion in Feasibility Study work. However, additional infill drilling should be planned for the Mutanga and Dibwe deposits with the objective of upgrading current inferred and Indicated Resources to higher categories. The current drill spacing of 50m × 50m at Mutanga may be sufficient to define Measured Resources over the deposit, based on interpolation and search criteria only. Further Measured Resources can only be classified once sensitivities concerning gamma data validation and topography have been addressed. At Dibwe, the current drill hole spacing of 100m × 50m is not adequate to establish geological and grade continuity along strike for the classification of Indicated Resources.

Following a review of the recent resource updates, CSA are confident that higher category resources can be classified in future resource estimates, with additional infill drilling and/or by addressing data sensitivities, which include;

	1.		Ongoing monitoring of internal laboratory control alongside external control is highly recommended as part of future drilling programs and should be implemented as a matter of course. A set of pulp duplicates should be submitted to an umpire laboratory which can then be analysed alongside SGS samples, also testing laboratory precision.

	2.		In order to increase the level of confidence that can be applied to the indirect method of uranium grade calculation via gamma probing which in turn influences the overall classification of resources, it is recommended that additional check assaying be undertaken at Mutanga and Dibwe that ensures not only that returned assays are representative of all grade ranges estimated by gamma probing, but also spatially representative. At this time the number of QAQC samples available for comparison is low. It is advisable that in future drilling campaigns, a minimum of 10% of mineralised zone intersections should be sampled and analysed via chemical assay so as to provide a reliable dataset with which to validate the use of gamma data.

	3.		CSA recommends Denison acquire aerial survey topographic data and generate contours at 1m intervals at an accuracy of +/- 0.5m for all areas that are potentially required for future mining and infrastructure development. In the short term, current 5m contour spot height data should be sought to further refine the current topography model.

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	4.		Additional bulk density sampling should be undertaken and representative samples collected from each domain from a variety of ore types and grade ranges. This information should be incorporated into future resource estimation work to improve the tonnage estimate.

	5.		Although the variography study at Mutanga gave reliable variogram parameters that were used in the kriging equations, deposit specific variography has not been undertaken at Dibwe. In order to upgrade Dibwe resources to higher categories, valid directions and ranges of grade continuity need to be established using Dibwe domain data from additional drilling.

	6.		The number of QAQC samples submitted overall was low (91) and it is advisable that in future drilling campaigns, this number should be increased to be more representative. It is highly advisable that, as a matter of course, QAQC data should be analysed concurrently with drilling. By doing this, if issues arise, it allows for the laboratory to be consulted, samples re-assayed and procedures reviewed if necessary, resulting in problems being resolved at the time and prevented for the rest of the campaign.

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21.0 REFERENCES

Chisholm, J. and Doepel, J., December 2005, Resource Estimation Mutanga-Dibwe Uranium Project Zambia, Continental Resource Management Pty Ltd (CRM), Internal Report.

Green, JD., 2006 Renewal Application Prospecting Licence LS PL 237 “The Kariba Uranium Project” Southern Province Republic of Zambia, GeoQuest Limited, Internal Report.

Fugro, July 2008, Technical Proposal Helicopter Borne Magnetic Horizontal Gradient (MIDAS^TM) and Radiometric Geophysical Survey Programme Near Lake Kariba,

Zambia, Fugro, Internal Report.

Mwalimu, SM., January 2009, Letter RE Application for Renewal of Large Scale Prospecting Licence - LPL237, Republic of Zambia Mines Development Department, Lusaka, Correspondence.

QEMSCAN, July 2006, QEMSCAN Analysis of 12 U-Ore Samples for U Classification. SGS Lakefield Ore Test — Ref No: BAMF00017a, QEMSCAN, Internal Report.

Titley, M. and Williams, D., August 2006, Announcement to the Australian Stock Exchange: 29 August 2006 JORC Compliant resource Increases by 25% at Kariba Project, OmegaCorp Limited, ASX Website.

Titley, M. and Williams, D., November 2006, Announcement to the Australian Stock Exchange: 13 November 2006 Scoping Study Confirms Strong Cash Margins Expected from Kariba Project, OmegaCorp Limited, ASX Website.

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25.0 CERTIFICATES AND CONSENTS

2 Peel House, Barttelot Road
Horsham, West Sussex RH12
1DE United Kingdom

Phone: + 44 1403 255 969
Fax: + 44 1403 240 896
Email: csauk@csaglobal.com

19 March 2009

Certificate of Qualification and Non Interest

I, Malcolm Titley, do certify the following:

	•		That I am a Principal of CSA Global UK Ltd (CSA) with the office at 2 Peel House, Barttelot Road, Horsham, West Sussex, RH12 1DE, United Kingdom.

	•		That I am a graduate of the University of Cape Town, South Africa, with a degree of Bachelor of Science, Geology & Chemistry (1979).

	•		That I have practised my profession as a geologist in the minerals industry for twenty seven (27) years. o That I am a member in good standing of the Australasian Institute of Mining and Metallurgy (AusIMM) and the Australasian Institute of Geoscientists (AIG).

	•		That I am a “Qualified Person” for purposes of National Instrument 43-101 (“NI 43-101”).

	•		That I am the author of the technical report titled ‘NI43-101 Technical Report, The Mutanga Project.

	•		That I am responsible for the preparation of all sections of the Technical Report and have had no prior involvement with The Mutanga Project.

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

	•		That I have read the NI 43-101, Companion Policy 43-101CP and Form 43-101F1 and the statement of resources in the Technical Report is in compliance with NI 43-101 and Form 43-101F1.

Yours sincerely,

Malcolm Titley
Principal Consultant
CSA Global (UK) Ltd

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

2 Peel House, Barttelot Road
Horsham, West Sussex RH12 1DE
United Kingdom

Phone: + 44 1403 255 969
Fax: + 44 1403 240 896
Email: csauk@csaglobal.com

19 March 2009

Ontario Securities Commission
British Columbia Securities Commission

Dear Sirs/Mesdames,

Consent of Expert

Malcolm Titley,

The undersigned has been responsible for preparing or supervising the preparation of all of the Technical Report The Mutanga Project to be filed with the above listed securities commissions by Denison Mines Corp. Pursuant to Section 8.3 of National Instrument 43-101 – Standards of Disclosure for Mineral Projects, this letter is filed as the consent of the undersigned to the public filing of such Technical Report and to extracts from or a summary of, the Technical Report in the news release dated 19 March 2009 (the “Disclosure”). The undersigned confirms that he has read the Disclosure and that the Disclosure fairly and accurately represents the information in the Technical Report and the Technical Report supports the Disclosure.

Yours sincerely

Malcolm Titley
Principal Consultant
CSA Global (UK) Ltd

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

Drill hole logging procedures at Mutanga are:

	a.		Hole is drilled.

	b.		Hole is probed.

	c.		Core is brought to core yard.

	d.		Core yard supervisor records core location, date etc.

	e.		Core is washed.

	f.		Trays are laid out in order.

	g.		Gamma probe data is processed.

	h.		Gamma probe data is printed in WellCAD and Gamlog,

	i.		Geologist interprets lithologies, structures and mineralisation in Gamlog (i.e. at 10cm resolution) WITHOUT reference to the core (yet),

	j.		Geologist and core yard technician inspect the core; objective is for Geologist to locate the lithologies, structure(s) and mineralisation identified in Gamlog in the core,

	k.		Geologist to check whether the core block depths correlate with these features,

	i.		If OK, proceed to step 1,

	ii.		If there are errors, geologist is to use a TEMPORARY marker (eg lead pencil) and, moving up and down from the feature, make metre marks on the core all the way to the next feature OR until the depths tally with the core blocks,

	iii.		Repeat the previous step up and down from the each feature until the temporary marks are aligned. Only when this happens can it be said that the core depths correlate with the gamma probe depths,

Using a permanent marker, mark the depth on the core with large, clear lines and arrow heads as shown in the diagram,

Core yard technician(s) to calculate and record the following STRAIGHT INTO DH Logger (NO PAPER COPIES OR INTERMEDIATE SOFTWARE eg EXCEL):

	1.		Core recovery,

	2.		Longest piece,

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

Scintillometer readings:

NOTE: SCINTILLOMETER READINGS ARE TO BE ENTERED DIRECTLY INTO DHLogger – NO pieces of paper, NO subsequent data entry and NO intermediate software (eg Excel)

	a.		At 50cm intervals IN THE TRAY – do not remove (because there is no way of ensuring that each piece sampled will be the same size),

	b.		When a reading exceeds 700cps, takes readings every 10cm up and down to the next 50cm mark.

ii.

Core yard technician to mark each core tray with the following:

	1.		On end and long side: Hole ID, Tray Number, Depth From, Depth To. (Add yellow sticker (if available) with this information on the end).

	2.		On upper side, top box edge: Hole ID, Tray Number, Depth From.

	3.		On upper side, bottom box edge: Depth To.

	iii.		Geologist check outs drill log to laptop; now ready to log core.

	iv.		Geologist logs the core:

Lithology (major and minor)

	a.		Escarpment Grit Formation Package C à B boundary

	b.		Escarpment Grit Formation Package B à A boundary

	c.		Escarpment Grit Formation Package A à Madumabisa Mudstone boundary

	d.		Correlatable mudstone boundaries (in accordance with cross section information)

	e.		Other significant, unusual or potentially correlatable lithologies.

Alteration:

Identify zones of limonite, hematite and goethite by colour.

Structure

	a.		Alpha angles

			Most core is too broken to permit orientation marks and lines so the collection of beta angles (i.e. angle of rotation against a line running down the bottom of the hole is difficult – or not possible. Thus, record the alpha angles, i.e. the angle to the long core axis. Try to record at least one bedding plane per tray – as well as every measurable contact between the key lithologies.

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	b.		Fault(s)

	c.		Other significant, unusual or potentially correlatable structures.

Mineralisation (in conjunction with WellCAD and Gamlog data)

	a.		Confirm/refute high grade zones (i.e. +700cps) as indicated by the scint data.

	b.		Attempt to identify ore mineral species and habit.

Any other information or comments.

Geologist returns to the office.

	1.		Adds the collar survey data,

	2.		Adds drill hole summary.

	3.		Checks the hole into the Central database.

vi.

MEANWHILE the core trays are photographed

	1.		Dry, then

	2.		Wet.

vii.

The photography technician:

	1.		Downloads the core photos to the server and

	2.		Edits the file name to show Hole ID, Depth From, Depth To and Wet or Dry.

viii.

The core yard technician:

	1.		Stacks the core into the racks,

	2.		Notes the Shed, Row, Bay and shelf number,

	3.		Enters this data into DHLogger.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

This procedure is followed by trained technicians at site; under supervision of a project geologist as required.

•

When doing the down hole geophysical logging some tools which are required are:

	•		Computer (Laptop) with the

	•		matrix Soft ware

	•		Matrix and Winch Probe (probing tool)

	•		Power (Generator)

	•		Docking station for the Laptop to cool it and charge it at the same time.

	•		The power supply cables are connected to the Matrix and the Winch

	•		The USB cable is connected between the computer and the matrix.

	•		the 19 pin single cable should be connected to the matrix and the winch because it brings data from the winch to the matrix

	•		The bulk head is cleaned and well connected to the probe because when these two are connected together they will be able to bring information from the probe itself to the computer.

	•		After all the connections are done open the matrix soft ware in your computer by double clicking•

	•		Click the arrow pointing down in the tool panel to select the tool you are using.

	•		Give power to the tool you are using by clicking ON in the tool panel and test if the tool is receiving power by clicking ON in the Acquisition panel

	•		Zero the tool by clicking the sign of maximizing in the depth panel on top right side

	•		Pull the list box to select either going up or down and click ON that is in the acquisition panel. Also to write the Hole ID click the black dot , after then save it and run the winch

	•		to stop “click the black squire in the acquisition panel” and check the data

	•		The maximum speed should be 5.0m per minute if more that more errors will appear and the data will be bad.

	•		To Close the programme right on the depth

	•		on the dash board there are six panels namely:

	•		Depth panel

	•		Tool panel

	•		Telemetry panel

	•		Acquisition

	•		Browsers And processor panel

	•		Status Panel

	1.		Depth panel

			The depth panel displays depth information and logging speed, it also allows the user to change the depth value and zero the tool before beginning the logging run.

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		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

Tool panel:

			Displays the currently selected tool type .It also displays the actual tool power supply voltage and current consumption. It also gives the control of tool specific function such as caliper. It provides the means to switch to power ON and OFF.

	3.		Telemetry panel:

			It shows the information about the data sampling and provides the facility to tune communication setting as appropriate. There are three led panel which displays;

	I.		Data sec: rate of data sampling.

	II.		Data: Indicates the number of data samples read unique to a recording or in the replay session.

	III.		Errors: Counts the error or number of times during the acquisition that the system failed to obtain valid data upon request. When data is not correctly received, the status led shows red.

	•		A tab labelled “setting” allows you to set the type of winch, which may be used.

	4.		Acquisition panel:

			This panel is used to select data recording modes; set sampling rate, start and stop data recording. There are options to select through the drop down menu and these are;

	•		Time

	•		depth up

	•		Depth down.

	5.		Browser and processer panel:

			This controls starting and stopping of client processor which consists of applications that support such function as data processing on screen display and printing.

	6.		Status panel:

			This displays the status of the various component of the logging system, where a green light indicates correct operation and a red light indicate an error.

Page 217 of 225


		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

Gamma Probe Calibration Data from the 2007-2008 Omega Drilling Campaign. This appendix comprises internal Omega e-mail communication detailing gamma probe calibration data in the US and on-site via test hole probing, and associated discussion. This information is referred to in Section 17.3.2.


TO:		Roger Staley
CC:		all other users
From:		Ken Sweet
Subject:		Gamma Calibration
Date:		20 August 2008

The calibration numbers below are to be used for uranium calculations. Drill holes logged before Aug 2008 should continue to use the old numbers.

Grade=Cal*CPS

Of course corrections must be made for dead time and bole conditions.

Calibration factors to use as of 20 August 2008


Tool	Cal		Dead		N3		U3		U2		U1		Date/Location
2PGA3732_2PEA3742		1.19E-05		7.40		17330		29548		58347		86393	Oct 2007/GJ
2PGA4184_2PEA4073		1.26E-05		6.90		16245		28060		57286		85465	Aug 2008/GJ	Repaired
2PGA3443_2PEA3449		1.23E-05		7.25		16990		29003		58330		86525	May 2008/GJ
2PGA4296_2pea4340		1.22E-05		7.30		17032		29223		58213		86156	Aug 2008/GJ	New tool

Tool 2PGA4184_2PEA4078 was sent back to the manufacture for repair. Water had leaked into the tool.

Page 219 of 225


		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009

Calibration factors to use as of 31 May 2008


Tool	Cal		Dead		N3		U3		U2		U1		Date/Location
2PGA3732_2PEA3742		1.19E-05		7.400		17330		29548		58347		86393	Oct 2007/GJ
2PGA3732_2PEA4078		1.20E-05		7.200		17349		29588		58978		86251	Oct 2007/GJ
2PGA4184_2PEA3742		1.23E-85		6.600		17302		29591		60114		91485	Oct 2007/GJ
2PGA4184_2PEA4078		1.23E-05		6.600		17222		29581		60208		91339	Oct 2007/GJ
2PGA3443_2PEA3449		1.23E-5		7.25		16990		29003		58330		86525	May 2008/GJ

Tool 2PGA3443_2PEA3449 malfunctioned and was returned to Mr. Sopris for repairs. After the repair the tool was recalibrated at Grand Junction, Colorado, USA. The old and new calibration factors are shown below. There is very little difference, the tool has not changed.

Holes logged prior to the repair, May 2008 should use the Oct 2007 factors shown below. New logging should use the new factors, May 2008. Pipe factors and water factors have not changed.


Tool	Cal		Dead		N3		U3		U2		U1		Date/Location
2PGA3443_2PEA3449		1.25E-5		7.30		17330		29548		58347		86393	Oct 2007/GJ
2PGA3443_2PEA3449		1.23E-5		7.25		16990		29003		58330		86525	May 2008/GJ

Page 220 of 225


		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


TO:		Roger Staley
CC:		all other users
From:		Ken Sweet
Subject:		Gamma Calibration
Date:		20 August 2008

As part of the continuing log quality control program drill hole MTD52050-05 has been logged several times to check the consistency of the grade calculations.

Individual zones have not been compared. I have compared the mineralization from 15.95 meters to 30.5 meters. Using a thick mineralized zone minimizes any depth errors and provides a good statistical comparison.


				Avg		GT		%
Tool	date	Thick		PPM		(M*PPM)		variation
2PGA4184_2PEA4078	10-Mar-08		14.10		284		401		2.0	%
2PGA3443_2PEA3449	10-Mar-08		14.10		289		407		3.6	%
2PGA3732_2PEA3742	10-Mar-08		14.10		290		409		4.0	%
2PGA4184_2PEA4078	14-Apr-08		14.10		288		406		3.4	%
2PGA3443_2PEA3449	14-Apr-08		14.10		302		426		8.4	%
2PGA3732_2PEA3742	14-Apr-08		14.10		296		418		6.3	%
2PGA3443_2PEA3449	5-Jun-08		14.10		247		348		-11.4	%
2PGA3443_2PEA3449	12-Aug-08		14.10		245		345		-12.1	%
2PGA3732_2PEA3742	20-Aug-08		14.10		267		376		-4.2	%
		Average=			279		393

Two tools are being shipped back this week with new calibrations. As soon as the tools arrive in Zambia we will relog the holes and make another comparison.

Page 221 of 225


		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


TO:		Japhet
CC:		Roger, Logging operators, Geologists
Subject		Comparison of tools 2PGA4296_2PEA4340 and 2PGA4184_2PEA4078
From:		Ken Sweet
Date:		11 Sept 2008

You sent me two logs of drill hole MTD51900-04 logged with the two newly calibrated logging tools, 2PGA4296_2PEA4340 and 2PGA4184_2PEA4078. You send me the raw data, the gamlog printout, and your comparison spreadsheet. You did a good job.

I have redone the spreadsheet so it is easier for me to compare the data. My copy is attached.

The best way to compare is to sum the entire mineralized zone. Individual 10 cm measurements can be different, the tool position might be little different.

Here the comparison is excellent:


	Sum of grades			Tool
Sum grades 0.5-14.0=		90143		2PGA4296_2PEA4340
Sum grades 0.5-14.0=		89326		2PGA4184_2PEA4078
Percent difference		0.9	%

I would like to see the data from the bent tool in this hole.

We need to log all three tools in drill hole DH MTD52050.

As you said in your Skype chat we should survey the hole 1 time per month. We should schedule for the first day of each month.

Page 223 of 225


		CSA Global (UK) Ltd. — NI 43-101 Technical Report Mutanga Project, Zambia — 19 March 2009


	Deg.Min.Sec				ARC1950 35S
ID	Longitude		Latitude		East		North		Description
A		28.13.06		-16.33.00		630000.0		8169992.0	Due west of U
B		28.13.06		-16.30.06		630032.3		8175339.2	Due north of A
C		28.15.06		-16.27.54		633615.6		8179374.0	Diagonally (45 degrees) from B
D		28.17.12		-16.27.36		637355.9		8179903.7	Diagonally (85 degrees) from C
E		28.19.12		-16.24.12		640955.7		8186150.0	Diagonally (35 degrees) from D
F		28.19.12		-16.22.06		640980.9		8190022.3	Due north of E
G		28.24.30		-16.18.06		650467.8		8197334.8	Diagonally (45 degrees) from F
H		28.28.12		-16.16.42		657076.1		8199869.9	Diagonally (50 degrees) from G
I		28.34.06		-16.13.30		667630.8		8205692.7	Diagonally (45 degrees) from H
J		28.42.30		-16.11.06		682635.1		8209999.1	Diagonally (40 degrees) from I
K		28.42.30		-16.11.06		682635.1		8209999.1	Due East of J
L		28.33.18		-16.22.18		666081.8		8189475.9	Diagonally (210 degrees) from K
M		28.37.42		-16.26.54		673847.8		8180931.6	Diagonally (150 degrees) from L
N		28.32.12		-16.31.06		664000.0		8173263.0	Diagonally (215 degrees) from M
O		28.26.12		-16.32.24		653308.5		8170944.6	following the lake outline
P		28.22.42		-16.32.24		647082.7		8170988.1	Due west of O
Q		28.23.00		-16.31.48		647623.9		8172090.9	following the lake outline
R		28.25.12		-16.29.18		651570.0		8176673.6	Diagonally (45 degrees) from Q
S		28.24.18		-16.28.30		649978.9		8178160.0	Diagonally (315 degrees) from R
T		28.20.30		-16.31.42		643177.9		8172305.3	Diagonally (220 degrees) from S
U		28.16.00		-16.33.00		635158.0		8169960.1	following the lake outline
A		28.13.06		-16.33.00		630000.0		8169992.0	Due west of U

Table 4.1(a): Co-ordinates of PL LS 237 6 January 2009

Page 225 of 225


18.0 OTHER RELEVANT DATA AND INFORMATION			186

18.1 De-mining and UXO Program			186

19.0 INTERPRETATION AND CONCLUSIONS			187

20.0 RECOMMENDATIONS			193

21.0 REFERENCES			195

22.0 DATE AND SIGNATURE PAGE			196

23.0 ADDITIONAL REQUIREMENTS FOR TECHNICAL REPORTS ON DEVELOPMENT PROPERTIES AND PRODUCTION PROPERTIES			197

24.0 ILLUSTRATIONS			198

25.0 CERTIFICATES AND CONSENTS			199



		CSA Global (UK) Ltd. – NI 43-101 Technical Report Mutanga Project, Zambia – 19 March 2009


			Continuity
Domain	Nugget (%)		Direction	Dip (^O)		Azi(^O)		Range (m)
Close Spaced Drilling		21	DIR1		6		132		75
			DIR2		6		223		40
			DIR3		81		357		10


Name :		Malcolm Titley
Degree and Professional Association:		BSc, MAusIMM, MAIG
Position:		Principal, CSA Global (UK) Ltd
Signuature:
Date:		19 March 2009