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Technical Report on the Nechalacho Deposit, Thor Lake Project, Northwest Territories, Canada

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Technical Report on the Nechalacho Deposit, Thor Lake Project, Northwest Territories, Canada TECHNICAL REPORT ON THE NECHALACHO DEPOSIT, THOR LAKE PROJECT, NORTHWEST TERRITORIES, CANADA PREPARED BY AVALON RARE METALS INC. Report for NI 43-101 Authors: Finley Bakker, P. Geo. (BC) Brian Delaney, P. Eng. (Newfoundland and Labrador) Bill Mercer, P Geol. (NWT) Dezhi Qi, P. Eng. (Alberta) Date: March 13, 2011 Document title: Technical Report on the Nechalacho Deposit, Thor Lake Project, Northwest Territories, Canada Authors: Finley Bakker, P.Geo. (BC) Brian Delaney, P. Eng. (Newfoundland and Labrador) Bill Mercer, P. Geol. (NWT ) Dezhi Qi, P. Eng (Alberta) Suite 1901, 130 Adelaide Street West Toronto, Ontario, M5H 3P5 Technical Report 43-101 – March 13, 2011 Page ii Prepared by Avalon Rare Metals Inc. TABLE OF CONTENTS 1. SUMMARY ...........................................................................................................1-1 EXECUTIVE SUMMARY ....................................................................................1-1 Introduction ....................................................................................................1-1 Conclusions ...................................................................................................1-1 Current Project Status....................................................................................1-8 Recommendations .........................................................................................1-8 2. INTRODUCTION ...................................................................................................2-1 RARE EARTH ELEMENTS.................................................................................2-3 Sources of Information ...................................................................................2-6 LIST OF ABBREVIATIONS............................................................................2-7 3. RELIANCE ON OTHER EXPERTS.......................................................................3-1 4. PROPERTY DESCRIPTION AND LOCATION .....................................................4-1 LOCATION .........................................................................................................4-1 LAND TENURE ..................................................................................................4-1 LEGAL AGREEMENTS, UNDERLYING ROYALTY INTERESTS.......................4-3 LEGAL SURVEY ................................................................................................4-3 ENVIRONMENTAL LIABILITIES ........................................................................4-3 5. ACCESSIBILITY, CLIMATE, LOCAL RESOURCES, INFRASTRUCTURE AND PHYSIOGRAPHY..................................................................................................5-1 ACCESSIBILITY.................................................................................................5-1 CLIMATE............................................................................................................5-1 LOCAL RESOURCES ........................................................................................5-2 Infrastructure..................................................................................................5-2 PHYSIOGRAPHY...............................................................................................5-3 Technical Report 43-101 – March 13, 2011 Page iii Prepared by Avalon Rare Metals Inc. 6. HISTORY.................................................................................................................... 6-1 7. GEOLOGICAL SETTING ......................................................................................7-1 REGIONAL GEOLOGY ......................................................................................7-1 REGIONAL STRUCTURES................................................................................7-4 DIABASE DYKES ...............................................................................................7-5 STRUCTURE AND TECTONICS........................................................................7-5 LATE TECTONIC FAULTS.................................................................................7-6 LOCAL GEOLOGICAL SETTING .......................................................................7-6 8. DEPOSIT TYPES ..................................................................................................8-1 CHARACTERISTICS OF THE NECHALACHO DEPOSIT ..................................8-2 9. MINERALIZATION................................................................................................9-1 TABLE OF MINERALS AND COMPOSITIONS ..................................................9-1 10. EXPLORATION...................................................................................................10-1 11. DRILLING............................................................................................................11-1 RECENT DRILLING .........................................................................................11-1 RECENT AND FUTURE DRILLING..................................................................11-2 CORE LOGGING AND CORE RECOVERY .....................................................11-5 NITON HANDHELD ANALYZER FOR GRADE AND QUALITY CONTROL......11-7 12. SAMPLING METHOD AND APPROACH ...........................................................12-1 13. SAMPLE PREPARATION, ANALYSES AND SECURITY SAMPLE..................13-1 SAMPLE PREPARATION AND STORAGE FOR CONVENTIONAL CORE......13-1 Analytical Procedures ..................................................................................13-2 CONCLUSIONS...........................................................................................13-5 14. DATA VERIFICATION ........................................................................................14-1 Technical Report 43-101 – March 13, 2011 Page iv Prepared by Avalon Rare Metals Inc. QUALITY ASSURANCE / QUALITY CONTROL...............................................14-1 SPECIFIC GRAVITY MEASUREMENT ............................................................14-8 15. OTHER PROPERTIES ........................................................................................15-1 16. MINERAL PROCESSING AND METALLURGICAL TESTING...........................16-1 METALLURGICAL TESTING............................................................................16-1 MINERALOGY..................................................................................................16-1 COMMINUTION................................................................................................16-1 FLOTATION .....................................................................................................16-2 HYDROMETALLURGY.....................................................................................16-2 17. MINERAL RESOURCE AND MINERAL RESERVE ESTIMATES......................17-1 MINERAL RESOURCES ..................................................................................17-1 Summary......................................................................................................17-1 Resource Database .....................................................................................17-3 Geological Modelling....................................................................................17-5 Composites..................................................................................................17-6 STATISTICS.....................................................................................................17-8 Cut-Off Grade ............................................................................................17-11 Specific Gravity ..........................................................................................17-12 Capping .....................................................................................................17-15 Database Validation ...................................................................................17-15 Block Grade Estimation..............................................................................17-15 Interpolation ...............................................................................................17-16 Search Strategy .........................................................................................17-16 Resource Classification..............................................................................17-17 Resource Estimate.....................................................................................17-18 Conclusion .................................................................................................17-22 MINERAL RESERVES ...................................................................................17-24 Cut-off Grade .............................................................................................17-24 Extraction and Dilution ...............................................................................17-26 Conclusions ....................................................................................................17-27 Technical Report 43-101 – March 13, 2011 Page v Prepared by Avalon Rare Metals Inc. 18. OTHER RELEVANT DATA AND INFORMATION..............................................18-1 MINING OPERATIONS ....................................................................................18-1 Mining Method .............................................................................................18-1 Mine Design.................................................................................................18-3
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