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Canada
Crater Lake Project

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 Location:
188 km NE from Schefferville, Quebec, Canada

  Project Contacts:
410 Saint-Nicolas, Suite 236
Montreal
Quebec, Canada
H2Y 2P5
Phone  ...  Subscription required
Fax(514) 907-9017
WebsiteWeb
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  • Overview
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  • Mining
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  • Production
  • Reserves
  • Costs & Financials
  • Fleet
  • Personnel
  • Filings & News

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Overview

StagePreliminary Economic Assessment
Mine TypeOpen Pit
Commodities
  • Scandium
  • REE
  • Total Rare Earth Oxides
Mining Method
  • Truck & Shovel / Loader
Production Start...
Mine Life25 years (as of Jan 1, 2022)
Latest NewsImperial Mining Intersects 378 g/t Sc2O3 over 24.68 m in a New High-Grade Zone at Crater Lake, Quebec     December 14, 2022


Owners

Source: p. 20,24
CompanyInterestOwnership
Imperial Mining Group Ltd. 100 % Indirect
The Project is wholly owned by Imperial.

Contractors

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Deposit Type

  • Intrusion related


Summary:

The Crater Lake Deposit is a large, scandium- and REE-bearing alkali igneous intrusive complex. Carbonatite and alkaline intrusive complexes (as well as their weathering products) are the primary sources of REE. Apart from REE, these rock types can also host deposits of niobium, phosphate, titanium, vermiculite, barite, fluorite, copper, calcite, and zirconium. Although these types of deposits are found throughout the world, only six are currently being mined for REE: five carbonatites (Bayan Obo, Daluxiang, Maoniuping, and Weishan deposits in China, and the Mountain Pass deposit in the USA) and one peralkaline intrusion-related deposit.

The Crater Lake syenites are interpreted to be a late differentiate product of the Mistastin Batholith. The dominant exposed lithology is coarse- to medium-grained, massive syenite, which is mainly composed of perthitic K-feldspar and 1 to 10% by volume of interstitial ferromagnesian minerals (Petrella 2012). A magnetic and melanocratic unit, ferro-syenite, which commonly contains greater than 50% by volume of ferromagnesian minerals, occurs as large continuous to discontinuous subvertical and conical bodies, sills, narrow dikes and inclusions in the felsic syenites. Three large ferro-syenite bodies have been found on the property: TGZ, Boulder Lake and STG. Petrella (2012) interpreted the narrow ferro-syenite dikes as having formed by fractional crystallization of ferromagnesian minerals, leaving behind a residual magma that produ ........


Mining Methods

  • Truck & Shovel / Loader


Summary:

The mining method selected for the Crater Lake project is a conventional drill and blast mine operation with truck and shovel excavation and transport of blasted material.

Mine production to feed the processing plant will begin in Project Year 1 and will average 426,100 t of mineralized material per year until Year 24 and decrease to 351,539 t at year 25. The life of the mine is 25 years. Mineralized materials will come from the Starter Pit in Year 1 and Year 2, then from the Middle Pit from Year 2 to Year 9, and finally from the Ultimate Pit from Year 9 to Year 25.

It was assumed in this PEA that overburden removal and hard rock mining will be performed by the Owner. Other scenarios involving contractors were not contemplated for this study, but such scenarios should be investigated during future studies on this project.

The overburden material is mainly constituted of glacial till at variable thicknesses, ranging from 0 m to approximately 10 m in the pit area. No drill and blast activities are planned for the removal of overburden removal.

The ore and waste rock material will be drilled and blasted in 10 m benches, then loaded into rigid-frame haul trucks with hydraulic shovels and wheel loaders.

In-pit haul roads and ramps are designed with an overall width of 22.5 m on overburden and rock. All ramps and haul roads are designed for double-lane traffic, except for the last two benches in the pit bottom which are design ........


Crushing and Grinding
Source: Subscription required

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Processing

Flow Sheet: Subscription required

Summary:

- subscription is required.


Projected Production:

CommodityProductUnitsAvg. Annual
Scandium Sc2O3 t 87
REE Hydroxide t  ......  Subscription required
Sc2O3 Al-2%Sc Master Alloy t  ......  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
Annual production capacity  ......  Subscription required
Tonnes processed, LOM  ......  Subscription required
Annual mining rate  ......  Subscription required
Annual ore mining rate  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

Reserves at September 17, 2021:
The mineral resource estimate is reported at a NSR cut-off of 110.8 CA$/t.

CategoryTonnage CommodityGrade
Indicated 7.3 Mt Sc2O3 282.01 g/t
Inferred 13.2 Mt Sc2O3 264.24 g/t

Commodity Production Costs:

CommodityAverage
Cash costs (sold) Sc2O3  ......  Subscription required&nbs
Total cash costs (sold) Sc2O3  ......  Subscription required&nbs
All-in costs Sc2O3  ......  Subscription required&nbs
Assumed price Sc2O3  ......  Subscription required *
* According to 2022 study / presentation.
Subscription required - Subscription is required.

Operating Costs:

Units2022
OP mining costs ($/t mined) CAD 7.8 *
OP mining costs ($/t milled) CAD  ......  Subscription required
G&A ($/t milled) CAD  ......  Subscription required
Total operating costs ($/t milled) CAD  ......  Subscription required
* According to 2022 study.
Subscription required - Subscription is required.

2022 Study Costs and Valuation Metrics :

MetricsUnitsLOM Total
Pre-Production capital costs $M CAD  ......  Subscription required
Sustaining CapEx $M CAD  ......  Subscription required
Total CapEx $M CAD  ......  Subscription required
OP OpEx $M CAD  ......  Subscription required
Total OpEx $M CAD  ......  Subscription required
Total Taxes $M CAD  ......  Subscription required
Royalty payments $M CAD  ......  Subscription required
Gross 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 @ 5% $M CAD  ......  Subscription required
Pre-tax NPV @ 10% $M CAD  ......  Subscription required
Pre-tax NPV @ 7% $M CAD  ......  Subscription required
After-tax NPV @ 5% $M CAD  ......  Subscription required
After-tax NPV @ 10% $M CAD  ......  Subscription required
After-tax NPV @ 7% $M CAD  ......  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.


Proposed Heavy Mobile Equipment as of July 26, 2022:
HME TypeModelSizeQuantity
Compactor ....................... Subscription required ....................... Subscription required
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Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Jul 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Jul 26, 2022
....................... Subscription required ....................... Subscription required Subscription required Aug 14, 2022
Subscription required - Subscription is required.

Staff:

Total WorkforceYear
Subscription required 2022

Corporate Filings & Presentations:

DocumentYear
Corporate Presentation 2023
Corporate Presentation 2022
Preliminary Economic Assessment 2022
Press Release 2022
Other 2018
Subscription required - Subscription is required.

News:

NewsDate
Imperial Mining Intersects 378 g/t Sc2O3 over 24.68 m in a New High-Grade Zone at Crater Lake, Quebec December 14, 2022

Subscription required - Subscription is required.

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