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Diavik Diamond Mine Northwest Territories, Canada NI 43-101 Technical Report

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Diavik Diamond Mine Northwest Territories, Canada NI 43-101 Technical Report Diavik Diamond Mine Northwest Territories, Canada NI 43-101 Technical Report Prepared for: Prepared by: Dominion Diamond Corporation C.G. Yip, P.Eng. 1102 – 4920 52nd Street K.S. Pollock, P.Geo. Yellowknife, NT X1A 3T1 Report date: Effective date: 27 March 2017 31 January 2017 Table of Contents 1. SUMMARY ............................................................................................................................................. 1 2. INTRODUCTION .................................................................................................................................... 4 3. RELIANCE ON OTHER EXPERTS ........................................................................................................ 6 4. PROPERTY DESCRIPTION AND LOCATION ...................................................................................... 7 4.1 Location ........................................................................................................................................ 7 4.2 Project Ownership ......................................................................................................................... 7 4.3 Mineral Tenure .............................................................................................................................. 7 4.4 Surface Rights ............................................................................................................................ 10 4.5 Water Rights ............................................................................................................................... 10 4.6 Royalties ..................................................................................................................................... 10 4.7 Permits ........................................................................................................................................ 10 4.8 Environmental Liabilities ............................................................................................................. 11 4.9 Comment .................................................................................................................................... 11 5. ACCESSIBILITY, CLIMATE, LOCAL RESOURCES, INFRASTRUCTURE AND PHYSIOGRAPHY . 13 5.1 Accessibility ................................................................................................................................ 13 5.2 Climate ........................................................................................................................................ 13 5.3 Local Resources and Infrastructure ............................................................................................ 14 5.4 Physiography .............................................................................................................................. 15 5.5 Comment .................................................................................................................................... 16 6. HISTORY .............................................................................................................................................. 17 6.1 Ownership History ....................................................................................................................... 17 6.2 Exploration History ...................................................................................................................... 17 6.3 Mineral Resource and Reserve Model History ........................................................................... 18 6.4 Mining History ............................................................................................................................. 19 7. GEOLOGICAL SETTING AND MINERALIZATION ............................................................................. 22 7.1 Regional and Project Geology .................................................................................................... 22 7.2 Comment .................................................................................................................................... 25 8. DEPOSIT TYPES ................................................................................................................................. 26 8.1 Comment .................................................................................................................................... 28 9. EXPLORATION .................................................................................................................................... 29 9.1 Geophysical Survey .................................................................................................................... 29 9.2 Geological Mapping .................................................................................................................... 29 9.3 Exploration Programs ................................................................................................................. 30 9.4 Hydrology and Geotechnical Studies.......................................................................................... 30 9.5 Comment .................................................................................................................................... 31 10. DRILLING ............................................................................................................................................. 32 10.1 Core Drilling ................................................................................................................................ 32 10.2 Large-Diameter Reverse-Circulation Drilling .............................................................................. 33 10.3 Other Sampling ........................................................................................................................... 33 10.4 Sampling Summary..................................................................................................................... 34 10.5 Drilling for Seismic Reflection ..................................................................................................... 36 10.6 Comment .................................................................................................................................... 37 11. SAMPLE PREPARATION, ANALYSES AND SECURITY ................................................................... 38 11.1 Sample Processing ..................................................................................................................... 38 i 11.2 Geochemistry Sampling .............................................................................................................. 40 11.3 Bulk Density ................................................................................................................................ 41 11.4 Microdiamonds ............................................................................................................................ 42 11.5 Bulk Sampling History ................................................................................................................. 42 11.6 Diamond Valuation...................................................................................................................... 43 11.7 Comment .................................................................................................................................... 43 12. DATA VERIFICATION .......................................................................................................................... 45 12.1 Comment .................................................................................................................................... 48 13. MINERAL PROCESSING AND METALLURGICAL TESTING ............................................................ 49 13.1 Metallurgical Testing ................................................................................................................... 49 13.2 Mineral Processing ..................................................................................................................... 49 13.3 Comment .................................................................................................................................... 49 14. MINERAL RESOURCE ESTIMATES ................................................................................................... 51 14.1 Tonnage ...................................................................................................................................... 51 14.2 Grade .......................................................................................................................................... 51 14.3 Mineral Resource Statement ...................................................................................................... 52 14.4 Comment .................................................................................................................................... 53 15. MINERAL RESERVE ESTIMATES ...................................................................................................... 54 15.1 Engineering ................................................................................................................................. 54 15.2 Mining Dilution and Losses ......................................................................................................... 55 15.3 Mine Economics .........................................................................................................................
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