technical report on the nechalacho deposit, thor lake project ...

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Table 17-6 Calculation Metal Values Avalon Rare Metals Inc. – Nechalacho Deposit gross value % flt rec %hyd rec % payable%recoverable final nmr nmr can$ Nb2O5 $ 45.00 68.9% 80.0% 100% 55% $ 24.80 $ 27.53 ZrO2 $ 3.77 89.7% 90.0% 100% 81% $ 3.04 $ 3.38 Ta2O5 $ 130.00 63.0% 50.0% 100% 32% $ 40.95 $ 45.45 Ga2O3 $ - 10.0% 0.0% 0% 0% $ - $ - HREO Y2O3 $ 23.22 79.5% 93.0% 70% 52% $ 12.02 $ 13.34 Eu2O3 $ 1,086.10 79.5% 93.0% 70% 52% $ 562.11 $ 623.94 Gd2O3 $ 13.39 79.5% 93.0% 70% 52% $ 6.93 $ 7.69 Tb2O3 $ 1,166.09 79.5% 93.0% 70% 52% $ 603.50 $ 669.89 Dy2O3 $ 254.59 79.5% 93.0% 70% 52% $ 131.76 $ 146.26 Ho2O3 $ 64.85 79.5% 93.0% 70% 52% $ 33.56 $ 37.25 Er2O3 $ 47.81 79.5% 93.0% 70% 52% $ 24.74 $ 27.47 Tm2O3 $ - 79.5% 93.0% 0% 0% $ - $ - Yb2O3 $ - 79.5% 93.0% 0% 0% $ - $ - Lu2O3 $ 510.97 79.5% 93.0% 70% 52% $ 264.45 $ 293.54 LREO La2O3 $ 4.06 79.5% 93.0% 50% 37% $ 1.50 $ 1.67 Ce2O3 $ 2.08 79.5% 93.0% 50% 37% $ 0.77 $ 0.85 Pr2O3 $ 43.87 79.5% 93.0% 50% 37% $ 16.22 $ 18.00 Nd2O3 $ 46.06 79.5% 93.0% 50% 37% $ 17.03 $ 18.90 Sm2O3 $ 5.58 79.5% 93.0% 50% 37% $ 2.06 $ 2.29 HfO2 $ - 0.0% 0.0% 0% 0% $ - $ - ThO2 $ - 0.0% 0.0% 0% 0% $ - $ - SPECIFIC GRAVITY Specific gravity is measured on core samples taken at 5 m intervals within the hole; each sample is approximately 10 cm long. Breaking the drill core (if necessary) only occurs after other tests that require undisturbed core (such as photography and geo<strong>technical</strong> analysis) have been completed. The density method is as follows: • Weigh the sample in air. • Weigh the sample suspended in water. A Mettler Toledo PL3001-S electronic scale is used for weighing in air (Figure 17-1). This scale has an accuracy of one decimal place. A small metal can suspended beneath the balance, set up on a table with a hole for the suspension of the basket, is used to weigh the sample in water (the Mettler balance has a hook Technical Report 43-101 – March 13, 2011 Page 17-12 Prepared by Avalon Rare Metals Inc.
underneath for SG measurement purposes). The balance is zeroed with the can hanging in a large container of water (Figure 17-2). The calculation of the SG is as follows: SG of sample = weight of sample in air/weight of sample in water. Figure 17-2 Weighing of Sample in Air Figure 17-3 Weighing of Sample in Water SG measurements on the drill core according to lithology are summarized in the Table 17-9. Technical Report 43-101 – March 13, 2011 Page 17-13 Prepared by Avalon Rare Metals Inc.
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TECHNICAL REPORT ON THE NECHALACHO
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TABLE OF CONTENTS 1. SUMMARY ......
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QUALITY ASSURANCE / QUALITY CONTROL
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Warehouse..........................
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LIST OF TABLES Table 1-1 Summary of
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Table 18-9 Mine Ventilation Quantit
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Table 18-54 Table 18-55 Pine Point
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LIST OF APPENDICES APPENDIX A Block
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Table 1-1 Summary of Mineral Resour
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Royalties. The net revenue generate
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• The products will be shipped in
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• Income taxes and NWT mining roy
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2. INTRODUCTION This report
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Figure 2-2 Project Sites, Thor Lake
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Table 2-1 Rare Earth Element Data A
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LIST OF ABBREVIATIONS Units of meas
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4. PROPERTY DESCRIPTION AND LOCATIO
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The mining leases have a 21-year li
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5. ACCESSIBILITY, CLIMATE, LOCAL RE
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Fort Resolution is located on the s
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producing a tantalum concentrate, b
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Figure 7-2 Detailed Deposit Geology
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The nepheline-sodalite syenite host
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LATE TECTONIC FAULTS Faults are pre
Page 49 and 50: 8. DEPOSIT TYPES The mineral deposi
Page 51 and 52: The Ore (Nechalacho) Nepheline Soda
Page 53 and 54: from section to section - this may
Page 55 and 56: Table 9-1 Average Percent of Ore Mi
Page 57 and 58: The Nechalacho deposit alteration s
Page 59 and 60: 11. DRILLING Since 1977, diamond dr
Page 61 and 62: Foraco drill rig was added in Febru
Page 63 and 64: CORE LOGGING AND CORE RECOVERY The
Page 65 and 66: A high R 2 (and all regressions had
Page 67 and 68: 12. SAMPLING METHOD AND APPROACH A
Page 69 and 70: such as Illimausaq in Greenland, a
Page 71 and 72: 13. SAMPLE PREPARATION, ANALYSES AN
Page 73 and 74: limited set of elements; however, s
Page 75 and 76: CONCLUSIONS Avalon’s conclusions
Page 77 and 78: Tb and Dy) were routinely monitored
Page 79 and 80: As part of the QA/QC program, Avalo
Page 81 and 82: Table 14-4: Comparison of Niobium,
Page 83 and 84: shows more deviation, with ALS MS81
Page 85 and 86: 16. MINERAL PROCESSING AND METALLUR
Page 87 and 88: In a typical test, for example CCr-
Page 89 and 90: 17. MINERAL RESOURCE AND MINERAL RE
Page 91 and 92: 9. TREO equivalent is estimated by
Page 93 and 94: Table 17-4 Sample Information Avalo
Page 95 and 96: Figure 17-1 Distribution of REO Com
Page 97 and 98: Assay Statistics for Upper Zone* *
Page 99: CUT-OFF GRADE A previous public res
Page 103 and 104: Figure 17-4 Density Measurements AL
Page 105 and 106: was equal to 60 m by 60 m by 30 m a
Page 107 and 108: Table 17-12 Detailed Resource Break
Page 109 and 110: Table 17-13 Indicated Mineral Resou
Page 111 and 112: Figure 17-7 Outline of Area of Indi
Page 113 and 114: The recoveries estimated for the fl
Page 115 and 116: grades were based upon the grades w
Page 117 and 118: Figure 18-1 Thor Lake Site Layout T
Page 119 and 120: Scott Wilson RPA recommends the use
Page 121 and 122: During discussions with the mine de
Page 123 and 124: Figure 18-4 Mine Layout Some of the
Page 125 and 126: Figure 18-5 Mine Development Schema
Page 127 and 128: Table 18-2 Development Tonnage Brea
Page 129 and 130: Until the crusher is in place and t
Page 131 and 132: Lateral Development The access decl
Page 133 and 134: Equipment will be selected based up
Page 135 and 136: Table 18-6 Estimated Electrical Loa
Page 137 and 138: VENTILATION The mine ventilation is
Page 139 and 140: for closing unused areas and for ch
Page 141 and 142: Mine Fan Horse Power Using the same
Page 143 and 144: Paste Fill System A paste fill syst
Page 145 and 146: Communications Mine communications
Page 147 and 148: completion of the 30 m to 50 m long
Page 149 and 150: HEALTH AND SAFETY All crew will be
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The crushing plant is designed for
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Table 18-12 (Cont’d) Principal Pr
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Figure 18-9 Hydrometallurgical Plan
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The Pine Point hydrometallurgical f
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Decant pipeworks have been included
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• Development of pre-feasibility
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Design Basis The pre-feasibility le
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non-woven geotextile) to prevent da
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divert surface drainage away from r
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A high pressure (200 psi) compresse
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Fuel deliveries are assumed to be s
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Mill Supplies The key mill supplies
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Table 18-15 Surface Equipment Fleet
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Figure 18-10 Thor Lake Temporary Ba
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• Together with the unloading log
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it will be necessary to upgrade the
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Table 18-16 Hydrometallurgical Plan
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Table 18-17 Surface Mobile Equipmen
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Rare Earth FOB China* FOB China** P
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• loparite and eudialyte in alkal
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Table 18-18 Rare Earth supply - 200
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Table 18-20 Rare Earth Demand by Ap
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Table 18-22 Proposed New REO Projec
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in China. On this basis, Avalon is
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Determine Prices for Avalon’s Pro
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The balance of niobium supply is co
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epresenting about 18% of total zirc
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Table 18-25 Historic Chinese Export
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Figure 18-16 Tantalum Markets - 200
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the price for tantalum chemicals in
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Surface Hydrology The Thor Lake dra
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seven) have occurred more frequentl
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elative to uranium, the overall eff
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interviews conducted for the nearby
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Wildlife Early science-based wildli
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Other environmental permits/approva
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TAXES The NWT diesel tax has been i
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Table 18-31 Mine Capital Cost Estim
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Table 18-33 Surface Infrastructure
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Table 18-36 Indirect Cost Estimate
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Table 18-37 Contingency Allowance A
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Operating Cost Exclusions The opera
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Table 18-40 Underground Mine Cost S
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Table 18-41 Mine Cost Details Avalo
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Thor Lake Surface The Thor Lake sur
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Table 18-45 Sales and Marketing Cos
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Table 18-47 Rail Car Load Limits Av
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there will be no overhauls in the i
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Other supplies and freight will be
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Table 18-55 Hydrometallurgical Plan
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Table 18-56 Cash Flow Summary Techn
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The sensitivity of the base case 8%
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19. INTERPRETATION AND CONCLUSIONS
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• The Mineral Reserves, which hav
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20. RECOMMENDATIONS The authors of
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21. REFERENCES BCC Research (2009):
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MDN Inc (2010): News Release Melvil
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Wardrop Engineering Inc. (2009): Th
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23. CERTIFICATES OF QUALIFIED PERSO
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CERTIFICATE OF QUALIFIED PERSON I,
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CERTIFICATE OF QUALIFIED PERSON I,
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Section 416000 Section 416100 Secti
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Technical Report 43-101 - March 13,
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