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Canada
Makwa-Mayville Project

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 Location:
138 NE from Winnipeg, Manitoba, Canada

  Project Contacts:
3335 Yonge Street, Suite 304
Toronto
Ontario, Canada
M4N 2M1
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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
  • Copper
  • Nickel
  • Cobalt
  • Palladium
  • Gold
  • Platinum
Mining Method
  • Truck & Shovel / Loader
Mine Life14 years (as of Jan 1, 2014)
Mayville is considered a copper dominant deposit, with lesser contributions of nickel and palladium magmatic segregation. Makwa is a nickel dominant deposit with lesser contributions of copper, palladium, and cobalt.


Owners

Source: p. 8
CompanyInterestOwnership
Grid Metals Corp. 100 % Indirect
The Makwa Mayville Ni-Cu-PGM-Co property is located 145 kilometers northeast of Winnipeg Manitoba. The property consists of several blocks of mining claims and a mineral lease. The Company owns 100% of the mineral rights of the property subject to a NSR and a minority interest in part of the Mayville block of claims.

Contractors

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Deposit Type

  • Magmatic
  • Iron formation hosted


Summary:

MAKWA
Four styles of mineralization on the Makwa Property are summarized in Ferreira et al., 1999 and some smaller mineralized showings are discussed in Juhas, 1973:
1. Magmatic nickel-copper mineralization,
2. Sulphide iron formation nickel-copper mineralization,
3. Sulphide iron formation copper mineralization,
4. Chromite mineralization.

The Makwa deposit consists of disseminated pyrrhotite, pentlandite, chalcopyrite, and pyrite in an ultramafic peridotite layer at the base of the BRS (Ferreira et al., 1999; Harper, 2004). The higher grade mineralization near the footwall contact contains approximately 15% disseminated sulphide minerals. About 12% of the sulphides contains nickel.

The Makwa deposit strikes at approximately N60°E to N70°E and dips at -60ºS to -90º. The overall average strike is approximately N68°E, however, shorter segments appear to strike at approximately N62°E. The western part of the deposit, west of section 7+00W (original grid), strikes approximately 280° at surface and the strike progressively changes down to approximately the 500 ft elevation, where the overall deposit strike becomes more linear. The deposit dips at approximately -70°S or less at the northeast and southwest extremities and dips at -80°S or steeper from approximately section 3+00W to section 8+00W (original grid). The deposit is approximately 500 m long by 10 m wide and extends to at least 500 m below surface. The deposit appears to hav ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The PEA is based on open pit mining with production from a single pit at the Makwa Property, followed by a single open pit at the Mayville Property. Pit benches will be five metres high for Makwa and ten metres high for Mayville. The mineralized material and waste rock will be drilled and blasted, loaded with front end loaders, and hauled to either a crusher or waste rock pile. Haulage distances from the open pit to the crusher area will vary. The Makwa ROM will be trucked approximately 43 km to the Mayville concentrator facility. Mayville ROM will be hauled approximately one kilometre to the concentrator.

It is estimated that the mine will operate on a general production schedule of 24 hours per day, seven days per week. Production blasts are scheduled to occur five to six days per week. Mine life is four years for Makwa and eight years for Mayville, and the mining rate will average approximately 20.5 million tonnes per year of mineralized material and waste mined.

Vegetation and topsoil will be cleared by dozers and graders preceding the mining operation. Suitable growth media material will be stockpiled for future reclamation use. For estimation purposes, it was assumed that a two metre thick layer of growth media is present on the Makwa and Mayville resource areas. When stripping activities are started, the actual thickness of the growth media will be determined, and the appropriate amount set aside. If any overburden needs to be stripped, then fro ........


Crushing and Grinding
Flow Sheet: Source

The concentrator consists of conventional multistage crushing followed by two stage grinding in closed circuit with hydrocyclones.


Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Copper Payable metal M lbs 274
Nickel Payable metal kt  ......  Subscription required
Cobalt Payable metal kt  ......  Subscription required
Palladium Payable metal oz  ......  Subscription required
Gold Payable metal oz  ......  Subscription required
Platinum Payable metal oz  ......  Subscription required
Copper Metal in concentrate M lbs 19
Nickel Metal in concentrate kt  ......  Subscription required
Cobalt Metal in concentrate kt  ......  Subscription required
Palladium Metal in concentrate oz  ......  Subscription required

Operational Metrics:

Metrics
Stripping / waste ratio 6.34 *
Daily mining capacity 82,000 t *
Daily ore mining rate 8,200 t *
Waste tonnes, LOM 247,893 kt *
Ore tonnes mined, LOM 39,073 kt *
Total tonnes mined, LOM 286,966 kt *
Daily processing capacity 8,600 t *
Daily processing rate 8,300 t *
Annual processing rate 3 Mt *
Annual ore mining rate 3 Mt *
* According to 2014 study.

Reserves at April 30, 2014:
Mineral Resources are reported at a net smelter return (NSR) cut-off value of C$15/tonne at Mayville and C$20.64/tonne at Makwa.

CategoryTonnage CommodityGradeContained Metal
Indicated 33.8 Mt Copper 0.37 % 276 M lbs
Indicated 33.8 Mt Nickel 0.27 % 203 M lbs
Indicated 33.8 Mt Cobalt 2 M lbs
Indicated 33.8 Mt Palladium 0.19 g/t 206 koz
Indicated 33.8 Mt Gold 43 koz
Indicated 33.8 Mt Platinum 0.06 g/t 65 koz
Inferred 5.9 Mt Copper 0.43 % 55 M lbs
Inferred 5.9 Mt Nickel 0.2 % 24 M lbs
Inferred 5.9 Mt Palladium 0.15 g/t 28 koz
Inferred 5.9 Mt Gold 7 koz
Inferred 5.9 Mt Platinum 0.06 g/t 11 koz

2014 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M CAD  ......  Subscription required
Sustaining CapEx $M CAD  ......  Subscription required
Total CapEx $M CAD  ......  Subscription required
Total OpEx $M CAD  ......  Subscription required
Royalty payments $M CAD  ......  Subscription required
Gross revenue (LOM) $M CAD  ......  Subscription required
Net revenue (LOM) $M CAD  ......  Subscription required
Pre-tax Cash Flow (LOM) $M CAD  ......  Subscription required
After-tax Cash Flow (LOM) $M CAD  ......  Subscription required
Pre-tax NPV @ 0% $M CAD  ......  Subscription required
Pre-tax NPV @ 10% $M CAD  ......  Subscription required
Pre-tax NPV @ 7.5% $M CAD  ......  Subscription required
After-tax NPV @ 0% $M CAD  ......  Subscription required
After-tax NPV @ 10% $M CAD  ......  Subscription required
After-tax NPV @ 7.5% $M CAD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
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Proposed Heavy Mobile Equipment as of April 30, 2014:
HME TypeModelSizeQuantity
Dozer (crawler) ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
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....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
....................... Subscription required ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameEmailProfileRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Dec 10, 2022
....................... Subscription required ....................... Subscription required Subscription required Dec 10, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2022
................................... Subscription required 2019
Preliminary Economic Assessment 2014
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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