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Canada
Superior Lake Project

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 Location:
154 km NE from Thunder Bay, Ontario, Canada

  Project Contacts:
1681 Chestnut Street, Suite 400
Vancouver
British Columbia, Canada
V6J 4M6
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  • Overview
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  • Reserves
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Overview

StagePermitting
Mine TypeUnderground
Commodities
  • Zinc
  • Copper
  • Gold
  • Silver
Mining Method
  • Sub-level open stoping (SLOS)
  • Cemented backfill
Mine Life8.5 years (as of Jan 1, 2021)
The Superior Polymetallic Zinc and Copper Project consists of the Pick Lake Deposit and the Winston Lake Deposit.

The Project is close to production, with most Capex-heavy infrastructure in place.


Owners

Source: p. 4
CompanyInterestOwnership
Metallum Resources Inc. (operator) 100 % Indirect
Metallum Resources owns 100% of the Superior Lake Zinc and Copper Project in Ontario, Canada.

The Superior Lake Project is located in the province of Ontario and consists of two deposits, Pick Lake and Winston Lake. Metallum Resources Inc. has a 100% interest in the claims comprising the Pick Lake deposit, subject to a 2% NSR royalty and an option to acquire a 100% interest in the claims comprising the Winston Lake deposit, also subject to a 2% NSR royalty. To exercise the Winston Lake option, a letter of credit of $1.2 million by the current property owner in favour of the Ontario mining ministry must be replaced by the Company.

Contractors

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Deposit Type

  • VMS


Summary:

The Project consists of the Pick Lake Deposit and the Winston Lake Deposit.

The Project occurs in Archean rocks of the Southern Superior Province which forms the core of the Canadian Precambrian Shield. It consists of a collage of Archean greenstone belts, that coalesced between 2.72 and 2.68 Ga and were intruded by a complex system of granitoid rocks that were exhumed by approximately 2.48 Ga (Percival, 2007). The Superior Province is particularly well endowed with gold, copper-zinc and nickel deposits, as well as other commodities in lesser amounts.

The Pick Lake and Winston Lake deposits and all nearby prospects are examples of metamorphosed volcanogenic massive sulphide (VMS) deposits, that form in collisional oceanic tectonic environments in areas of localised rifting (Lodge et al., 2014).

The Pick Lake deposit belongs to the bimodal mafic volcanic sub-type, also known as Canadianshield or Noranda-type VMS deposits. The deposits of this sub-type are characterised by dominating of the mafic volcanics with the felsic volcanic rocks constituting less than 25% of the sequence.

PICK LAKE DEPOSIT
The Pick Lake deposit occurs at the extreme western edge of the Winston-Big Duck Lake sequence of volcanic rocks, approximately 35 metres above a granitic contact. Aeromagnetics within the Project area depicts a distinctive ā€œVā€ shaped sequence of magnetic and non- magnetic units converging to a northern ā€œVā€ apex and appears remarkably s ........


Mining Methods

  • Sub-level open stoping (SLOS)
  • Cemented backfill


Summary:

The Pick Lake deposit is a narrow-vein, Volcanogenic Massive Sulphide (VMS) polymetallic orebody, which suits narrow-vein style extraction. Mechanised narrow-vein sublevel central retreat open stoping with cemented paste fill was selected as the mining method.

Owner mining is proposed for Pick Lake, as a highly skilled workforce is available in the region with a strong mining history. This will enable cost-effective, productive and timely development, which will minimise time to first ore, and with the acquisition of the fleet on a lease basis will minimise capital outlays in the pre-production period.

Ore will be mined and hauled to surface, where it will be processed at the Winston Lake site, producing both a zinc and copper concentrate for sale.

Previous mining activity at both Pick Lake and Winston Lake revolved around shaft and winze access, hence, there is existing infrastructure in terms of capital development. Due to the levels of uncertainty around their condition, and the associated economics, two alternative methods for mine access were assessed at the design stage, noting that the previous Winston Lake plant site has been identified as the prospective process plant location and the bulk of the economic mineralisation is located at Pick Lake.

Two options for ore removal were analysed One option was for the development of a decline from the process plant directly to Pick Lake and the other option was for the refurbishment ........


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsAvg. AnnualLOM
Zinc Metal in concentrate t 33,401283,912
Zinc Concentrate kt 70593
Copper Metal in concentrate t  ......  Subscription required  ......  Subscription required
Copper Concentrate kt  ......  Subscription required  ......  Subscription required
Gold Metal in concentrate oz  ......  Subscription required  ......  Subscription required
Silver Metal in concentrate oz  ......  Subscription required  ......  Subscription required

Operational Metrics:

Metrics
Daily milling capacity  ......  Subscription required
Waste tonnes, LOM  ......  Subscription required
Ore tonnes mined, LOM  ......  Subscription required
Total tonnes mined, LOM  ......  Subscription required
Tonnes milled, LOM  ......  Subscription required
Plant annual capacity  ......  Subscription required
Annual milling rate  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2021 study.
Subscription required - Subscription is required.

Reserves at October 15, 2020:
Mineral Resources estimated and reported with using 3% Zn as a lower cut-off.
Ore Reserves are based solely on Indicated Mineral Resources and are reported above cut-off grade 5.2% Zn.

CategoryTonnage CommodityGrade
Probable 1.96 Mt Zinc 13.9 %
Probable 1.96 Mt Copper 0.6 %
Probable 1.96 Mt Gold 0.2 g/t
Probable 1.96 Mt Silver 26.2 g/t
Indicated 2.07 Mt Zinc 17.9 %
Indicated 2.07 Mt Copper 0.8 %
Indicated 2.07 Mt Gold 0.4 g/t
Indicated 2.07 Mt Silver 33.6 g/t
Inferred 0.27 Mt Zinc 16.2 %
Inferred 0.27 Mt Copper 1 %
Inferred 0.27 Mt Gold 0.3 g/t
Inferred 0.27 Mt Silver 37.2 g/t

Commodity Production Costs:

CommodityAverage
All-in sustaining costs (AISC) Zinc  ......  Subscription required&nbs
C1 cash costs Zinc  ......  Subscription required&nbs
Assumed price Zinc  ......  Subscription required *
Assumed price Copper  ......  Subscription required *
Assumed price Silver  ......  Subscription required *
Assumed price Gold  ......  Subscription required *
* According to 2022 study / presentation.
Subscription required - Subscription is required.

2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Initial CapEx $M CAD  ......  Subscription required
Pre-tax NPV @ 8% $M CAD  ......  Subscription required
After-tax NPV @ 8% $M CAD  ......  Subscription required
Pre-tax IRR, %  ......  Subscription required
After-tax IRR, %  ......  Subscription required
After-tax payback period, years  ......  Subscription required
Subscription required - Subscription is required.


Proposed Heavy Mobile Equipment as of September 15, 2021:
HME TypeModelSizeQuantityLeased or
Contractor
ANFO Loader ....................... Subscription required ....................... Subscription required Leased
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....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Leased
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Sep 15, 2021
....................... Subscription required ....................... Subscription required Subscription required Sep 15, 2021
Subscription required - Subscription is required.

Staff:

EmployeesYear
Subscription required 2021

Corporate Filings & Presentations:

DocumentYear
Press Release 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Subscription required - Subscription is required.

Subscription required - Subscription is required.

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