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Canada
Turnagain Project

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 Location:
65 km E from Dease Lake, British Columbia, Canada

  Project Contacts:
Suite 203, 700 West Pender Street
Vancouver
British Columbia, Canada
V6C 1G8
Phone  ...  Subscription required
EmailEmail
WebsiteWeb
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  • Overview
  • Owners
  • Geology
  • Mining
  • Processing
  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Nickel
  • Cobalt
Mining Method
  • Truck & Shovel / Loader
Mine Life37 years (as of Jan 1, 2020)
Fully funded to complete PFS in H1 2023.


Owners

Source: p. 1
CompanyInterestOwnership
Mitsubishi Corp. 15 % Indirect
Giga Metals Corp. (operator) 85 % Indirect
On September 1, 2022, Giga Metals Corporation completed its joint venture transaction with Mitsubishi Corporation to form a new joint venture company, Hard Creek Nickel Corp., to jointly pursue the development of the Turnagain Nickel Deposit in northern British Columbia, Canada.

Further to the announcement on August 15, 2022, MC has now acquired a 15% equity interest in Hard Creek. Giga received an 85% equity interest in Hard Creek in exchange for contributing all related assets for the Turnagain Project. Giga, with support from MC, will operate the joint venture, reporting to the board of directors of Hard Creek Nickel Corp.

Contractors

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Deposit Type

  • Magmatic


Summary:

The Early Jurassic (190 ±1 million years ago (Scheel, 2007)) Turnagain complex comprises a central core of dunite with bounding units of wehrlite, olivine clinopyroxenite, clinopyroxenite, representing crystal cumulate sequences, hornblende clinopyroxenite and hornblendite.The complex is elongate and broadly conformable to the northwesterly trending regional structural grain.

The ultramafic rocks are generally fresh to mildly serpentinised; however, more intense serpentinisation and talc-carbonate alteration occur along faults and restricted zones within the complex. The central part of the ultramafic body is intruded by granodiorite to diorite, and hornblende–plagioclase porphyry dikes and sills.

Showings of semi-massive and massive sulphides have been identified by work to date. These semi-massive and massive zones, plus broad zones of disseminated sulphides, are generally hosted by dunite and wehrlite near the southern and eastern margins of the ultramafic body. The central and northern dunite is largely devoid of sulphide minerals although their highly magnesian olivine is more enriched in nickel (up to 0.20 to 0.30 weight percentage) than the olivine in the peridotites and pyroxenites of the Horsetrail and Northwest zones, which may be nickel-depleted in areas of sulphide mineralisation. Nixon (1998) suggests that these features are further evidence of fractional crystallisation of the ultramafic magma.

Primary sulphide minerals consist o ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The Turnagain deposit will be mined using an open pit mining method, employing high volume trucks and shovels. The use of large mining equipment will achieve high mining rates and ensure the lowest possible mine operations unit costs. The waste and mineralized rockwill require blasting and typical grade control methods using blast-hole sampling.

The mine will feed the crusher at an average rate of 45,000 t/d during the first five years and increase to an average of 90,000 t/d thereafter. The resource will be mined for 37 years at these rates based on a 365-day production year.

To access the most economic mineralisation in the early years and provide a smooth strip ratio throughout the life of mine, mineralisation production from the Horsetrail pit is scheduled from five mining phases. Stage 1 will commence at the centre of the pit, where the highest grade and lowest strip ratio will be encountered.

An elevated cut-off grade will be employed in the initial production years to enhance the economics of the project. Mineralisation that is below the mine high-grade (HG) direct feed cutoff, but of sufficient grade to cover the cost of milling and rehandling once it is hauled out of the pit, will be classified and stockpiled by categorised value for subsequent rehandling. Stockpile reclaim will occur at the end of the mine life or it will be blended with the ROM feed as the appropriate opportunity arises. Low-grade (LG) stockpiles will be placed in ........


Crushing and Grinding
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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Nickel Payable metal kt 959
Nickel Metal in concentrate kt 331,229
Nickel Concentrate kt 1856,828
Cobalt Payable metal kt  ......  Subscription required
Cobalt Metal in concentrate kt  ......  Subscription required  ......  Subscription required

Operational Metrics:

Metrics
Stripping / waste ratio  ......  Subscription required
Daily ore mining rate  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Daily processing capacity  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual processing rate  ......  Subscription required
Mining scale, tpd  ......  Subscription required
Processing scale, tpd  ......  Subscription required
* According to 2020 study.
Subscription required - Subscription is required.

Reserves at October 27, 2022:
Mineral resources are reported at a cut-off grade of 0.1% Ni. Cut-off grades are based on a price of US $9.00 per pound nickel
and a number of operating cost and recovery assumptions, plus a contingency.

CategoryTonnage CommodityGradeContained Metal
Measured 423.4 Mt Nickel 0.214 % 1,998 M lbs
Measured 423.4 Mt Cobalt 0.013 % 125.1 M lbs
Indicated 1,096 Mt Nickel 0.209 % 5,040 M lbs
Indicated 1,096 Mt Cobalt 0.013 % 308 M lbs
Measured & Indicated 1,519 Mt Nickel 0.21 % 7,038 M lbs
Measured & Indicated 1,519 Mt Cobalt 0.013 % 433.1 M lbs
Inferred 1,222 Mt Nickel 0.206 % 5,555 M lbs
Inferred 1,222 Mt Cobalt 0.012 % 325.3 M lbs

Commodity Production Costs:

CommodityUnitsAverage
Credits (by-product) Nickel USD  ......  Subscription required&nbs
Site cash costs (produced) Nickel USD  ......  Subscription required&nbs
Cash costs Nickel USD  ......  Subscription required *†
Assumed price Cobalt USD  ......  Subscription required&nbs
Assumed price Nickel USD  ......  Subscription required&nbs
* According to 2020 study / presentation.
† Net of By-Product.

Operating Costs:

Units2020
OP mining costs ($/t milled) USD 2.72 *
Processing costs ($/t milled) USD  ......  Subscription required
G&A ($/t milled) USD  ......  Subscription required
Total operating costs ($/t milled) USD  ......  Subscription required
* According to 2020 study.
Subscription required - Subscription is required.

2020 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M USD  ......  Subscription required
Expansion CapEx $M USD  ......  Subscription required
Sustaining CapEx $M USD  ......  Subscription required
Closure costs $M USD  ......  Subscription required
OP OpEx $M USD  ......  Subscription required
Processing OpEx $M USD 4,962
G&A costs $M USD 797
Total OpEx $M USD  ......  Subscription required
Mining Taxes $M USD  ......  Subscription required
Income Taxes $M USD  ......  Subscription required
Royalty payments $M USD  ......  Subscription required
Gross revenue (LOM) $M USD  ......  Subscription required
EBITDA (LOM) $M USD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M USD  ......  Subscription required
After-tax Cash Flow (LOM) $M USD  ......  Subscription required
Pre-tax NPV @ 8% $M USD  ......  Subscription required
After-tax NPV @ 8% $M USD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
Pre-tax payback period, years  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.

Water Supply
Source: Subscription required

- subscription is required.


Proposed Heavy Mobile Equipment as of October 28, 2020:
HME TypeModelSizeQuantity
Dozer (crawler) ....................... Subscription required 425 kW ....................... Subscription required
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Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Oct 28, 2020
....................... Subscription required ....................... Subscription required Subscription required Dec 20, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2020

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Corporate Presentation 2022
Press Release 2022
Press Release 2022
................................... Subscription required 2020
Technical Report 2011
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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