NI 43-101 Preliminary Economic Assessment Report
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N.I. 43-101 TECHNICAL REPORT & PRELIMINARY ECONOMIC ASSESSMENT FOR THE TURNAGAIN PROJECT British Columbia, Canada Report date: November 18, 2020 Effective date: October 28, 2020 Prepared for: Suite 203 – 700 West Pender St., Vancouver, BC, V6C 1G8 www.gigametals.com Prepared by: 1066 W. Hastings St., Vancouver, BC, V6E 3X2 Qualified Persons Ian Thompson, P.Eng., Persio Rosario, P.Eng., Evan Jones, P.Eng., Gerald Schwab, P.Eng., & Stefan Hlouschko, P.Eng. – Hatch Ltd. • Garth Kirkham, P.Geo – Kirkham Geosystems • Daniel Friedman, P.Eng. – Knight Piésold • Ron Monk, P.Eng. – Kerr Wood Leidal • Chris Martin, C.Eng. MIMMM – Blue Coast Metallurgy • Andrew Mitchell, PhD, C.Eng – Wood Mackenzie Kirkham Geosystems Ltd. IMPORTANT NOTICE TO READER This report was prepared by the qualified persons (QPs) listed in Table 2.1. Each QP assumes responsibility for those sections or areas of this report that are referenced opposite their name in Table 2.1. None of the QPs, however, accepts any responsibility or liability for the sections or areas of this report that were prepared by other QPs. This report was prepared to allow Giga Metals Corporation (the “Owner”) to reach informed decisions respecting the development of the Turnagain Project. Except for the purposes legislated under provincial securities law, any use of this report by any third party is at that party's sole risk, and none of the contributors shall have any liability to any third party for any such use for any reason whatsoever, including negligence. This report is intended to be read as a whole, and sections should not be read or relied upon out of context. This report contains estimates, projections and conclusions that are forward-looking information within the meaning of applicable securities laws. Forward-looking statements are based upon the responsible QP’s opinion at the time that they are made but in most cases involve significant risk and uncertainty. Although each of the responsible QPs has attempted to identify factors that could cause actual events or results to differ materially from those described in this report, there may be other factors that cause events or results to not be as anticipated, estimated or projected. None of the QPs undertake any obligation to update the forward-looking information. As permitted by Item 3 of Form 43-101F1, the QPs have, in the preparation of this report, relied upon certain reports, opinions and statements of certain experts. These reports, opinions and statements, the makers of each such report, opinion or statement and the extent of reliance is described in Section 3.0 of this report. Each of the QPs hereby disclaims liability for such reports, opinions and statement to the extent that they have been relied upon in the preparation of this report, as described in Section 3.0. None of the QPs undertake any obligation to update any information contained in this report, including, without limitation, any forward-looking information. N.I. 43-101 Technical Report & Preliminary Economic Assessment for the Turnagain Project Report Contents 1.0 Summary ................................................................................................................... 13 1.1 Introduction ................................................................................................................. 13 1.2 Project Location .......................................................................................................... 13 1.3 History ........................................................................................................................ 13 1.4 Geology & Mineralisation ............................................................................................ 14 1.5 Resource Estimate ...................................................................................................... 14 1.6 Metallurgical Testing ................................................................................................... 16 1.7 Recovery Methods ...................................................................................................... 18 1.8 Mining Methods ........................................................................................................... 18 1.9 Infrastructure ............................................................................................................... 20 1.9.1 Power Supply .................................................................................................. 20 1.9.2 Waste / Tailings Management ......................................................................... 20 1.10 Environmental Considerations ..................................................................................... 21 1.11 Capital & Operating Costs ........................................................................................... 22 1.12 Economic Evaluation ................................................................................................... 23 1.13 Conclusions & Recommendations ............................................................................... 26 2.0 Introduction ............................................................................................................... 27 3.0 Reliance on Other Experts ........................................................................................ 29 4.0 Property Description & Location .............................................................................. 30 4.1 Location ...................................................................................................................... 30 4.2 Mineral Claims ............................................................................................................ 32 4.3 Permits & Environmental Liabilities ............................................................................. 36 4.4 Royalties ..................................................................................................................... 37 5.0 Accessibility, Climate, Local Resources, Infrastructure & Physiography ............. 38 5.1 Accessibility ................................................................................................................ 38 5.2 Climate........................................................................................................................ 39 5.3 Hydrology .................................................................................................................... 40 5.4 Local Resources ......................................................................................................... 43 5.5 Infrastructure ............................................................................................................... 43 5.6 Physiography .............................................................................................................. 44 6.0 History ....................................................................................................................... 47 6.1 2006-2008 ................................................................................................................... 48 6.2 2009-2011 ................................................................................................................... 48 6.3 2012-2019 ................................................................................................................... 49 November 18, 2020 P a g e | i N.I. 43-101 Technical Report & Preliminary Economic Assessment for the Turnagain Project 7.0 Geological Setting & Mineralisation ......................................................................... 50 7.1 Regional Geology........................................................................................................ 50 7.2 Property Geology ........................................................................................................ 51 7.2.1 Dunite ............................................................................................................. 53 7.2.2 Wehrlite........................................................................................................... 53 7.2.3 Olivine Clinopyroxenite & Clinopyroxenite ....................................................... 53 7.2.4 Hornblende Clinopyroxenite & Clinopyroxenite ................................................ 54 7.2.5 Magmatic Hornblendite & Hornblende Clinopyroxenite .................................... 54 7.2.6 Hornblende Diorite .......................................................................................... 54 7.2.7 Metasediments ................................................................................................ 54 7.3 Mineralisation .............................................................................................................. 54 8.0 Deposit Types ........................................................................................................... 57 9.0 Exploration ................................................................................................................ 58 9.1 Geological Mapping .................................................................................................... 58 9.2 Geochemical Surveys ................................................................................................. 58 9.3 Geophysical Surveys .................................................................................................. 59 9.3.1 Airborne Surveys............................................................................................