ebook img

Technical Report on the Cerro Negro Feasibility Study Santa Cruz Province, Argentina PDF

367 Pages·2010·16.95 MB·English
Save to my drive
Quick download
Download
Most books are stored in the elastic cloud where traffic is expensive. For this reason, we have a limit on daily download.

Preview Technical Report on the Cerro Negro Feasibility Study Santa Cruz Province, Argentina

Minerals & Metals 1892-RPT-010 Revision Number 0 Technical Report on the Cerro Negro Feasibility Study Santa Cruz Province, Argentina July 20, 2010 1892-RPT-010 Rev: 0 Date: July 2010 9999FM0105 – 1 Table of Contents 1  Summary 1  1.1  Introduction 1  1.2  Exploration 2  1.3  Geology 3  1.4  Mineralization 4  1.5  Resource Estimation 4  1.6  Mineable Reserves and Mining 6  1.7  Metallurgical Testwork 7  1.8  Mineral Processing 8  1.9  Mine Geotechnical and Plant Foundations 9  1.10  Infrastructure 10  1.11  Project Implementation 14  1.12  Environmental 14  1.13  Capital and Operating Cost Estimates 15  1.14  Financial Analysis 17  1.15  Conclusions and Recommendations of Qualified Persons 18  2  Introduction and Terms of Reference 20  2.1  Introduction 20  2.2  Project Scope and Terms of Reference 20  2.3  Qualified Persons 20  2.4  Frequently Used Acronyms, Abbreviations, Definitions, and Units of Measure 21  2.5  Area Definitions and Naming Conventions Used in Report 22  3  Reliance on Other Experts 24  3.1  Qualified Persons 24  3.2  Other Experts 24  4  Property Description and Location 25  4.1  Location 25  4.2  Land Area 25  4.3  Agreements and Encumbrances 28  4.4  Environmental Liabilities and Permitting 29  5  Accessibility, Climate, Local Resources, Infrastructure and Physiography 30  5.1  Access 30  5.2  Climate 30  5.3  Local Resources and Infrastructure 31  5.4  Physiography 31  6  History 33  6.1  Exploration History of the Cerro Negro Property 33  6.2  Exploration History of Eureka Vein System 35  6.3  Exploration History of Bajo Negro 35  6.4  Exploration History of Vein Zone 35  6.5  Historical Mineral Resource Estimates 36  6.6  Mineral Reserves Estimate 39  7  Geological Setting 40  7.1  Regional Geology 40  7.2  Project Area Geology 41  1892-RPT-010 i Rev: 0 Date: July 2010 9999FM0105 – 1 8  Deposit Types 49  9  Mineralization 51  9.1  Eureka Vein System 52  9.2  Bajo Negro 54  9.3  Vein Zone 56  10  Exploration 58  10.1  Andean’s Exploration of the Cerro Negro Property 58  10.2  Eureka Vein System 61  10.3  Bajo Negro 61  10.4  Vein Zone 62  11  Drilling 65  11.1  Summary 65  11.2  Drilling by Pegasus Gold International 70  11.3  Drilling by MIM Holdings Ltd. 70  11.4  Drilling by Oroplata Pty Ltd. 70  11.5  Drilling by Andean Resources Ltd. 71  12  Sampling Method and Approach 74  12.1  Sampling by Pegasus Gold International 74  12.2  Sampling by MIM Holdings Ltd. 74  12.3  Sampling by Oroplata Pty Ltd. 74  12.4  Sampling by Andean Resources 75  13  Sample Preparation, Analyses and Security 79  13.1  Pegasus Gold International 79  13.2  MIM Holdings Ltd. 79  13.3  Drilling by Oroplata Pty Ltd. 81  13.4  Early Drilling by Andean Resources Ltd. (Phases 1 to 4) 81  13.5  Current Drilling by Andean Resources Ltd. (Phase 5) 83  14  Data Verification 87  14.1  Historic Data Verification 87  14.2  Database Management 91  14.3  Database Audit 91  14.4  Review of Quality Control and Quality Assurance (“QA/QC”) Data 94  14.5  Sample Integrity 114  14.6  MDA Independent Sampling 121  14.7  Summary Statement on Data Verification 122  15  Adjacent Properties 123  16  Mineral Processing and Metallurgical Testing 124  16.1  Historic Testing 124  16.2  Testing for the 2010 Feasibility Study 124  16.3  Testwork Samples 126  16.4  Mineralogical Examination 127  16.5  Comminution 128  16.6  Extraction – Domain Composites 130  16.7  Extraction Variability 139  16.8  Settling 141  16.9  Filtration 143  16.10  Cyanide Detoxification 144  16.11  Metallurgical Recoveries 145  1892-RPT-010 ii Rev: 0 Date: July 2010 9999FM0105 – 1 16.12  Conclusions 146  16.13  Recommendations 147  17  Mineral Resource and Mineral Reserve Estimates 148  17.1  Introduction 148  17.2  Resource Models 148  17.3  Eureka Mineral Resource Estimate 151  17.4  Bajo Negro Mineral Resource Estimate 162  17.5  Vein Zone Mineral Resource Estimate 172  17.6  Discussion of Drilling that Post-dates the Resource Estimates 188  17.7  Mineral Reserve Estimate 189  18  Other Relevant Data and Information 199  18.1  Additional Vein Systems 199  18.2  Environment and Social Aspects 199  19  Interpretation and Conclusions 200  19.1  Mineral Resource 200  19.2  Geotechnical 200  19.3  Mineral Reserve Estimates and Mining 201  19.4  Metallurgical Processing 201  19.5  Tailings Storage Facility 202  20  Recommendations 203  20.1  Geomechanical 203  20.2  Site Geotechnical 204  20.3  Mining 205  20.4  Metallurgical Processing 205  20.5  Tailings Storage Facility (TSF) 205  20.6  Risk Assessment 205  21  References 206  22  Date and Signature Pages 211  23  Additional Requirements for Technical Reports on Development Properties and Production Properties 216  23.1  Hydrogeology 216  23.2  Mining 221  23.3  Metallurgical Processing 246  23.4  Site Infrastructure 259  23.5  Tailings Management 278  23.6  Environmental and Social Impact Assessment 288  23.7  Mine and Plant Geotechnical 297  23.8  Capital Cost Estimate 322  23.9  Operating Cost Estimate 325  23.10  Operations Project Organization 341  23.11  Marketing 345  23.12  Financial Analysis 350  23.13  Project Implementation 354  1892-RPT-010 iii Rev: 0 Date: July 2010 9999FM0105 – 1 Table 1.1: Total Estimated Gold and Silver Resources for Cerro Negro 5  Table 1.2: Cerro Negro Probable Reserves 6  Table 1.3: Recoveries Selected for Financial Evaluation 7  Table 1.4: Recoveries Selected for Mineral Reserve Estimation 8  Table 1.5: Capital Cost Summary 15  Table 1.6: Total Operating Cost Summary 16  Table 1.7: Cerro Negro NPV and IRR (US$850/oz Au and US$14/oz Ag) 18  Table 2.1: Responsibilities of Each Qualified Person 21  Table 4.1: Andean’s Land Holdings for the Cerro Negro Property 28  Table 6.1: Estimated Mineralization for Vein Zone by Meldrum (1999) 37  Table 6.2: 2007 Estimated Mineral Resources for Vein Zone 37  Table 6.3: 2007 Mineral Resource Estimate for the Eureka West Zone 38  Table 6.4: 2008 Mineral Resource Estimate for the Eureka West Zone 38  Table 6.5: Estimated Mineral Resources of the Eureka West Area 39  Table 7.1: Key to Units Shown in Figure 7.4 44  Table 8.1: Conditions of Mineralizing Fluid in Selected Cerro Negro Veins 49  Table 9.1: Opaque Mineralogy and Au-Ag Grades of the Eureka Vein System 53  Table 9.2: Vein Mineralogy of the Eureka West Vein 53  Table 9.3: Vein Mineralogy of the Bajo Negro Vein 55  Table 10.1: RC and Core Holes Drilled in the Eureka Resource Area 61  Table 11.1: Eureka Drill Holes 65  Table 11.2: Bajo Negro Drill Hole Database 67  Table 11.3: Vein Zone Drill Hole Database 69  Table 13.1: Standards Statistics from MIM Sampling 80  Table 13.2: Screen Fire Assay Statistics from MIM 80  Table 13.3: MIM Check Assaying 81  Table 14.1: Analytical Standards Used with Drill Hole Samples – April 2009 96  Table 14.2: List of Standards Employed 105  Table 14.3: Summary of Gold in Standards 107  Table 14.4: Summary of Silver in Standards 107  Table 14.5: Summary of Differences in Duplicates, Gold Only 110  Table 14.6: Descriptive Statistics of the Core Recovery and RQD Data Eureka Database 115  Table 14.7: Comparison of Core and RC Sample Grades 119  Table 14.8: Descriptive Statistics of the Core Recovery and RQD Data Bajo Negro Database 120  Table 14.9: MDA Check Samples from Eureka Core 121  Table 14.10: MDA Check Samples from Bajo Negro Core 122  Table 16.1: Domain Composite Summary Head Analysis 127  Table 16.2: Variability Composite Bond Index Determination Results 128  Table 16.3: Variability Composite Bond Index Determination Results 129  Table 16.4: Cyanidation Residence Time Au Extraction 133  Table 16.5: Cyanidation Residence Time Ag Extraction 134  Table 16.6: East Composite Whole Ore Low Cyanide Leach Tests – Au Extraction 134  Table 16.7: East Composite Whole Ore Low Cyanide Leach Tests – Ag Extraction 135  Table 16.8: East Composite Whole Ore Low Cyanide Leach Tests Summary 135  Table 16.9: Varying Gravity Mass % Recovery Leach Tests 137  1892-RPT-010 iv Rev: 0 Date: July 2010 9999FM0105 – 1 Table 16.10: Whole Ore Bulk Leach 138  Table 16.11: Bajo Negro Zinc Precipitation Tests – High Temperature De-aeration 139  Table 16.12: Vein Zone Leach Test 139  Table 16.13: Summary of Variability Composite Leach Tests 140  Table 16.14: Eureka Domain Composites Dynamic Thickening Testwork Results 142  Table 16.15: Bajo Negro Domain Composites Dynamic Thickening Testwork Results 142  Table 16.16: Recoveries Selected for Financial Evaluation 145  Table 16.17: Recoveries Selected for Mineral Reserve Calculations 145  Table 17.1: Total Estimated Gold and Silver Resources for Cerro Negro 148  Table 17.2: Descriptive Statistics of the Eureka Database 152  Table 17.3: Descriptive Statistics of the Density Samples 156  Table 17.4: Eureka Classification Criteria 157  Table 17.5: Total Gold and Silver Resources for Eureka: Indicated and Inferred 158  Table 17.6: Eureka Vein and Vein-Breccia Gold and Silver Mineralization 162  Table 17.7: Descriptive Statistics of the Bajo Negro Database 163  Table 17.8: Descriptive Statistics of the Density Samples 167  Table 17.9: Classification Criteria for Bajo Negro 168  Table 17.10: Total Gold and Silver Resources for Bajo Negro: Indicated and Inferred 168  Table 17.11: Vein-Only Mineralization Subset of the Gold and Silver Resources for Bajo Negro 171  Table 17.12: Descriptive Statistics of the Vein Zone Database 172  Table 17.13: Sample Statistics – Gold 173  Table 17.14: Sample Statistics – Silver 174  Table 17.15: Descriptive Statistics of the Density Samples at Vein Zone 178  Table 17.16: Estimation Parameters for Stockwork (Low-Grade) 180  Table 17.17: Estimation Parameters for Vein Mineralization 181  Table 17.18: Estimation Parameters for Gold outside the Defined Mineral Gold Domains 182  Table 17.19: Estimation Parameters for Silver outside the Defined Mineral Silver Domains 182  Table 17.20: Classification Criteria for Vein Zone 183  Table 17.21: Total Gold and Silver Resources for Vein Zone: Indicated and Inferred 184  Table 17.22: Total Cerro Negro Reserves Summary 189  Table 17.23: Eureka SMU Dimensions and Dilution Criteria 190  Table 17.24: Eureka Economical and Metallurgical Parameters 191  Table 17.25: Eureka Reserves Summary 191  Table 17.26: Eureka Probable Reserves by Metallurgical Domain 192  Table 17.27: Bajo Negro SMU Dimensions and Dilution Criteria 192  Table 17.28: Bajo Negro Economical and Metallurgical Parameters 193  Table 17.29: Bajo Negro Reserves Summary 193  Table 17.30: Vein Zone Parameters for Pit Optimization 194  Table 17.31: Vein Zone Pit Optimization Results 195  Table 17.32: Pit Design Parameters 196  Table 17.33: Vein Zone Reserves Summary 198  Table 23.1: Mean Flow Test Results 219  Table 23.2: Bajo Negro Selective Mining Units (SMU) Dimensions and Dilution Criteria 227  Table 23.3: Pit Design Parameters 228  Table 23.4: Eureka Mine Schedule 231  1892-RPT-010 v Rev: 0 Date: July 2010 9999FM0105 – 1 Table 23.5: Bajo Negro Mine Schedule 232  Table 23.6: Vein Zone Mine Schedule 232  Table 23.7: Cerro Negro Integrated Plant Feed 233  Table 23.8: Eureka Total Development Summary 234  Table 23.9: Average Monthly Advance Rates 235  Table 23.10: Eureka Initial Development (Contractor) 235  Table 23.11: Eureka Initial Development (Owner) 235  Table 23.12: Eureka Ongoing Development (Owner) 236  Table 23.13: Bajo Negro Development (Owner) 237  Table 23.14: Design Criteria Summary for Eureka Ore 247  Table 23.15: Mobile Equipment Allocations 276  Table 23.16: Tailings Production Rate 278  Table 23.17: General Design Criteria and Parameters 279  Table 23.18: Strength properties used in Stability Analyses 281  Table 23.19: Minimum Factors of Safety for Tailings Dams 282  Table 23.20: Environmental Impacts and Mitigation Measures 293  Table 23.21: Eureka Rock Uniaxial Compressive Strength used for Stope Design 302  Table 23.22: Summary of Eureka Principal Discontinuity Orientation (Dip/Dip Direction) 302  Table 23.23: Q’ statistics for Eureka Stope Design 303  Table 23.24: Rock Mass Properties used for Eureka Stope Design 304  Table 23.25: Recommended Initial Eureka Stope Geometry, Single Lift Stoping 305  Table 23.26: Bajo Negro Rock Uniaxial Compressive Strength by Domain 308  Table 23.27: UCS per Domain used for Bajo Negro Stope Design 308  Table 23.28: Summary of Principal Bajo Negro Decline Features Orientation (Dip/Dip Direction) 308  Table 23.29: Q’ Statistics for Bajo Negro Stope Design 309  Table 23.30: Rock Mass Properties used for Bajo Negro Stope Design 310  Table 23.31: Recommended Initial Bajo Negro Stope Geometry, Single Lift Stoping Without Systematic Support 311  Table 23.32: Vein Zone Rock Mass Discontinuities Orientations 312  Table 23.33: Design Density Values Adopted for each Vein Zone Geotechnical Domain 314  Table 23.34: Fractures Spacing per Vein Zone Domain Described during Geotechnical Logging 315  Table 23.35: Uniaxial Resistance Design for each Vein Zone Domain 315  Table 23.36: Failure Criteria Strength Parameters Estimated per Vein Zone Domain 316  Table 23.37: Slope Profiles Recommended for each Vein Zone Geotechnical Domain 321  Table 23.38: Capital Cost Estimate Summary 322  Table 23.39: Capital Costs by Area (000s) 323  Table 23.40: Sustaining Capital Expenditures (000s) 325  Table 23.41: Unit Costs for Main Consumables 326  Table 23.42: Hourly Equipment Costs 326  Table 23.43: Cost per Type of Mining Activity 327  Table 23.44: Power Consumption 328  Table 23.45: Mining Costs per Period 328  Table 23.46: Total Unit Cost Breakdown – Eureka 329  Table 23.47: Total Production Volumes – Bajo Negro 329  Table 23.48: Operational Expenditures – Bajo Negro (US$000s) 330  1892-RPT-010 vi Rev: 0 Date: July 2010 9999FM0105 – 1 Table 23.49: Total Unit Cost Breakdown – Bajo Negro 330  Table 23.50: Annual Operating Costs – Vein Zone 330  Table 23.51: Equipment Annual Operating Hours – Vein Zone 331  Table 23.52: Cost per Operating Hour for Equipment (by type) 331  Table 23.53: Mine Operational Expenditures for Vein Zone per Year (US$000s) 332  Table 23.54: Vein Zone Operational Expenditures – Unit Cost (US$/t) 333  Table 23.55: Mill Production Schedule 335  Table 23.56: Cerro Negro Project Operating Cost Summary 336  Table 23.57: Operating Labour Summary 337  Table 23.58: Reagent / Consumable Operating Costs 337  Table 23.59: G&A Cost Summary 340  Table 23.60: Total Operating Cost Summary 340  Table 23.61: Forecast Annual Production 345  Table 23.62: Anticipated Product Quality 345  Table 23.63: Allowable Impurities for Major Refineries 346  Table 23.64: Doré Shipping Costs 350  Table 23.65: Cerro Negro Cash Flow Summary 351  Table 23.66: Long-Term Metal Prices 352  Table 23.67: Cerro Negro NPV and IRR (US$850/oz Au and US$14/oz Ag) 352  Table 23.68: Sensitivity Analysis 353  Figure 1-1: Location Map Showing Proximity of Eureka to El Retiro 11  Figure 1-2: Sensitivity Analysis 17  Figure 2-1: Eureka Area Definitions and Naming Conventions Used in Report 23  Figure 4-1: Location of the Cerro Negro Property 26  Figure 4-2: Mineral and Surface Tenements of the Cerro Negro Property 27  Figure 5-1: In order: Eureka, Bajo Negro and Vein Zone Areas 32  Figure 7-1: Location of the Cerro Negro Property and the Deseado Massif 40  Figure 7-2: Geology of the Deseado Massif 41  Figure 7-3: Project Area Geology, Cerro Negro Area 42  Figure 7-4: Detailed Geology of the Eureka Area 45  Figure 7-5: Structural Relationships of the Eureka Vein System 45  Figure 7-6: Detailed Geology, Bajo Negro Prospect 46  Figure 7-7: Longitudinal Grade x Thickness – 3D Projection of the Bajo Negro Vein 47  Figure 7-8: Geology of the Vein Zone Area 48  Figure 8-1: Model for Au-Ag Deposition after Leach and Corbett (2008) 50  Figure 9-1: Mineralized Areas of the Cerro Negro Property 51  Figure 11-1: Eureka Area Drill Hole Map 66  Figure 11-2: Bajo Negro Area Drill Hole Map 68  Figure 11-3: Vein Zone Area Drill Hole Map 69  Figure 14-1: Control Chart for Gold in Standard 062 97  Figure 14-2: Gold in Blanks vs. Gold in Preceding Samples, Phase 5 98  Figure 14-3: Gold in Blanks vs. Gold in Preceding Samples, Pre-Phase 5 100  1892-RPT-010 vii Rev: 0 Date: July 2010 9999FM0105 – 1 Figure 14-4: Pulp Duplicates, Gold Relative Percent Difference, Phase 5 101  Figure 14-5: Pulp Duplicates, Gold Absolute Value Relative Percent Difference, Phase 5 102  Figure 14-6: Preparation Duplicates, Gold Absolute Value Relative Percent Difference, Phase 5 103  Figure 14-7: Field Duplicates, Gold Absolute Value Relative Percent Difference, Pre-Phase 5 Core 104  Figure 14-8: Field Duplicates, Gold Absolute Value Relative Percent Difference, Pre-Phase 5 RC 105  Figure 14-9: Performance of Primary Lab on Gold in STD-036 106  Figure 14-10: Performance of Primary Lab on Gold in Blanks 108  Figure 14-11: Performance of Primary Lab on Silver in Blanks 109  Figure 14-12: Gold in Reverse-Circulation Field Duplicates 111  Figure 14-13: Gold in Core Field Duplicates 112  Figure 14-14: Gold in Preparation Duplicates 113  Figure 14-15: Gold in Pulp Duplicates 114  Figure 14-16: Core Recovery at Eureka by Gold Mineral Domains 115  Figure 14-17: RQD at Eureka by Gold Mineral Domains 116  Figure 14-18: Gold Grades by Core Recovery inside All Mineralized Zones 116  Figure 14-19: Silver Grades by Core Recovery inside All Mineralized Zones 117  Figure 14-20: Gold Grades by RQD inside the Mineralized Zones 117  Figure 14-21: Silver Grades by RQD inside the Mineralized Zones 118  Figure 16-1: Gold Residue Grade with Varying Grind 131  Figure 16-2: Silver Residue Grade with Varying Grind 131  Figure 16-3: Gold Residue Grades for Variability Samples 140  Figure 16-4: Silver Residue Grades for Variability Samples 141  Figure 17-1: Typical Section of the Eureka Gold Mineral Domains – Section 150E 154  Figure 17-2: Typical Section of the Eureka Silver Mineral Domains – Section 150E 155  Figure 17-3: Typical Section of the Gold Mineral Domains with Block Model for Eureka 159  Figure 17-4: Typical Section of the Silver Mineral Domains with Block Model for Eureka 160  Figure 17-5: Typical Section of the Bajo Negro Gold Mineral Domains – Section 250N 165  Figure 17-6: Typical Section of the Bajo Negro Silver Mineral Domains – Section 250N 166  Figure 17-7: Typical Section of the Bajo Negro Gold Mineral Domains with Block Model Section 250 169  Figure 17-8: Typical Section of the Bajo Negro Silver Mineral Domains with Block Model Section 250 170  Figure 17-9: Typical Section of the Vein Zone Gold Mineral Domains – Section 8650E 176  Figure 17-10: Typical Section of the Vein Zone Silver Mineral Domains – Section 8650E 177  Figure 17-11: Typical Section of the Vein Zone Gold Block Model – Section 8650E 185  Figure 17-12 Typical Section of the Vein Zone Silver Block Model – Section 8650E 186  Figure 17-13 : Final Pit Design 196  Figure 17-14: Vein Zone - Dilution and Ore Losses 197  Figure 23-1: El Retiro Equipotential Map 217  Figure 23-2: Eureka Equipotential Map 218  Figure 23-3: El Retiro Proposal Wells 220  Figure 23-4: Eureka Longitudinal Section 222  Figure 23-5: Eureka Isometric View 223  Figure 23-6: General Mining Sequence 224  Figure 23-7: Eureka Stopes Dimensions 226  Figure 23-8: Bajo Negro Isometric View 227  Figure 23-9: Final Pit Design 228  1892-RPT-010 viii Rev: 0 Date: July 2010 9999FM0105 – 1 Figure 23-10: Eureka Mining Sequence 229  Figure 23-11: Bajo Negro Mining Sequence 229  Figure 23-12: Vein Zone Initial Pushback 230  Figure 23-13: Eureka Main Decline Layout 238  Figure 23-14: Ventilation Flow Direction 238  Figure 23-15: Bajo Negro Infrastructure Layout 239  Figure 23-16: Eureka Material Storage Areas 242  Figure 23-17: Bajo Negro Material Storage Areas 242  Figure 23-18: Vein Zone Waste Dump 243  Figure 23-19: Refuge and Escape Shaft 244  Figure 23-20: Refuge and Escape Shaft Details 244  Figure 23-21: Power Supply and Distribution 245  Figure 23-22: Process Plant Overall Process Flow Diagram 251  Figure 23-23: Process Plant General Arrangement 252  Figure 23-24: Route of 132 kV Transmission Line 265  Figure 23-25: Site Access Roads 268  Figure 23-26: Tailings Storage Facility General Arrangement 280  Figure 23-27: Assumed Model for the Stability Analyses 282  Figure 23-28: Typical Dam Section 283  Figure 23-29: Water Balance Flow Diagram 285  Figure 23-30: Tailings Storage Facility Development Sequence 286  Figure 23-31: Growth Curve of Dam 1 287  Figure 23-32: Growth Curve of Dam 2 288  Figure 23-33: Eureka General Plan and Drill Hole Locations 299  Figure 23-34: Bajo Negro Drill Hole Locations 300  Figure 23-35: Vein Zone General Plan and Drill Hole Locations 301  Figure 23-36: Schematic sketch showing definition of stope nomenclature 304  Figure 23-37: Definition of Bajo Negro Geotechnical Domains on Base of Downhole Intersections 307  Figure 23-38: Summary of surface geology, Vein Zone pit 313  Figure 23-39: RMR 76' per Vein Zone domain 316  Figure 23-40: Design Cross-sections Considered in Vein Zone Pit 318  Figure 23-41: Vein Zone Design Sections A and B 319  Figure 23-42: Geometric Definitions of Open Pit Slopes 320  Figure 23-43: Senior Management 341  Figure 23-44: Gold – London PM Fix 2000 – Present 347  Figure 23-45: Silver – London PM Fix 2000 – Present 347  Figure 23-46: Gold Annual Total Demand 348  Figure 23-47: Gold Annual Total Supply 348  Figure 23-48: Sensitivity Analysis 354  Figure 23-49: Project Organization 355  1892-RPT-010 ix Rev: 0 Date: July 2010 9999FM0105 – 1

Description:
Mine Geotechnical and Plant Foundations. 9. 1.10. Infrastructure. 10 . Table 17.7: Descriptive Statistics of the Bajo Negro Database. 163. Table 17.8:
See more

The list of books you might like

Most books are stored in the elastic cloud where traffic is expensive. For this reason, we have a limit on daily download.