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United States
Eagle Mine

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 Location:
44 km E from L'Anse, Michigan, United States

  Address:
4547 County Road 601
Champion
Michigan, United States
49814
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Fax(906)-339-7005
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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Nickel
  • Copper
  • Cobalt
  • Silver
  • Gold
Mining Method
  • Bench & Fill
  • Sub-level open stoping (SLOS)
  • Transverse open stoping
  • Longitudinal retreat
  • Cemented backfill
Production Start...
Mine Life2025


Owners

Source: p. 13,45
CompanyInterestOwnership
Lundin Mining Corp. 100 % Indirect
Eagle Mine LLC (operator) 100 % Direct
Ownership Tree
Eagle Mine, including Eagle East, is 100% owned by Lundin Mining.

Contractors

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Deposit Type

  • Magmatic


Summary:

Magmatic sulphide deposits containing nickel (Ni) and copper (Cu), with or without (±) platinum-group elements (PGMs), account for approximately 60% of the world’s Ni production and are active exploration targets in the United States and elsewhere. On the basis of their principal metal production, magmatic sulphide deposits in mafic rocks can be divided into two major types: those that are sulphide-rich, typically with 10 to 90% sulphide minerals, and have economic value primarily because of their Ni and Cu contents; and those that are sulphide-poor, typically with 0.5 to 5% sulphide minerals, and are exploited principally for PGE.

The Eagle deposit and the Eagle East conduit zone are high-grade magmatic sulphide accumulations containing nickel-copper mineralization and minor amounts of cobalt and PGMs. The economic minerals associated with this deposit are predominately pentlandite and chalcopyrite.

Eagle and Eagle East are part of the same ultramafic intrusive complex and both host high grade primary magmatic nickel copper sulphide mineralization. Mineralization styles are similar at Eagle and Eagle East, consisting of ovoid to pipe-like bodies of mineralized peridotite with concentrations of sulphide mineralization along the base of the intrusion resulting in the accumulation of semi-massive sulphide, and a central core zone of massive sulphide.

Two types of potentially economic mineralization are found in Eagle and Eagle East: semimassive ........


Mining Methods

  • Bench & Fill
  • Sub-level open stoping (SLOS)
  • Transverse open stoping
  • Longitudinal retreat
  • Cemented backfill


Summary:

The Eagle Mine is accessed via a main ramp, measuring 5.35 m high by 5.65 m wide and driven at a grade of -13%. The main ramp was driven to the 145 level, the lowest level and bottom of the Eagle Mine.

Mine production is made up of a combination of ore development through sill drifts or cuts (approximately 19%) and stope production (81%). The mining method selected for Eagle and Eagle East is the Transverse Sub-level Open Stoping (SLOS) method using a combination of cemented rock fill (CRF) and non-consolidated waste rock backfill. SLOS would also be used for any potential mining at Eagle East. This method provides the cost advantages of bulk mining, while maintaining a degree of selectivity and operational flexibility. The majority of the stopes will be mined as transverse bench and fill stopes, with some narrower zones of the orebody mined as longitudinal retreat stopes.

The Eagle orebody is accessed by the sub-level footwall drives driven off the main decline at 20 m to 25 m vertical intervals.

Stopes are designed to be 10 m wide and approximately 25 m high (corresponding to the top and bottom sub-levels). Stope lengths vary depending on the width of the orebody, however, due to geotechnical constraints, individual stope panels are limited to a maximum length of 20 m. The height and length of each stope panel is designed based on the hydraulic radius (HR) of the stope to limit sloughing from the walls and caving from the backs of the stop ........


Crushing and Grinding
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Processing

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Summary:

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Production:

CommodityUnits2022202120202019201820172016
Nickel t  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required17,57322,08124,114
Copper t  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
Silver koz  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required  ......  Subscription required
All production numbers are expressed as metal in concentrate. ^ Guidance / Forecast.
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Operational Metrics:

Metrics202120202019201820172016
Ore tonnes mined  ......  Subscription required  ......  Subscription required748 kt753 kt760 kt745 kt
Tonnes milled  ......  Subscription required  ......  Subscription required747 kt754 kt754 kt748 kt
Plant annual capacity  ......  Subscription required  ......  Subscription required700 kt700 kt700 kt700 kt
Daily processing capacity  ......  Subscription required  ......  Subscription required2,000 t
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Reserves at June 30, 2021:
The Eagle Mineral Resources and Reserves are reported above a fixed NSR cut-off of $123/t for long-hole stope and sills. The Eagle East Mineral Resources are reported within constraining grade shells based on a fixed NSR cut-off of $142/t and the Mineral Reserves are reported above $142/t for long-hole stopes and $152/t for cut-and-fill stopes.

CategoryTonnage CommodityGradeContained Metal
Proven 469 kt Nickel 2 % 9 kt
Proven 469 kt Copper 1.6 % 8 kt
Proven 469 kt Gold 0.1 g/t
Probable 2,811 kt Nickel 2.38 % 67 kt
Probable 2,811 kt Copper 1.99 % 56 kt
Probable 2,434 kt Silver 8 g/t 0.7 M oz
Probable 2,811 kt Gold 0.2 g/t
Proven & Probable 3,280 kt Nickel 2.4 % 77 kt
Proven & Probable 3,280 kt Copper 1.9 % 64 kt
Proven & Probable 3,280 kt Silver 6 g/t 0.7 M oz
Proven & Probable 3,280 kt Gold 0.2 g/t
Measured 508 kt Nickel 2.3 % 12 kt
Measured 508 kt Copper 1.9 % 9 kt
Measured 508 kt Gold 0.2 g/t
Indicated 2,547 kt Nickel 2.83 % 72 kt
Indicated 2,547 kt Copper 2.32 % 59 kt
Indicated 2,148 kt Silver 10 g/t 1 M oz
Indicated 2,547 kt Gold 0.3 g/t
Inferred 18 kt Nickel 1 %
Inferred 18 kt Copper 1 %
Inferred 18 kt Gold 0.1 g/t

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
Credits (by-product) Nickel USD  ......  Subscription required  ......  Subscription required  ......  Subscription required -3.56 / lb   -3.37 / lb   -2.47 / lb  
Cash costs Nickel USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 4.57 / lb   4.3 / lb   4.22 / lb  
Cash costs Nickel USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1.01 / lb†   0.93 / lb†   1.75 / lb†  
All-in sustaining costs (AISC) Nickel USD  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 1.84 / lb†   1.42 / lb†   2.1 / lb†  
^ Guidance / Forecast.
† Net of By-Product.
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Operating Costs:

Units20162015
Total operating costs ($/t milled) USD 115.97138.25

Financials:

Units2022202120202019201820172016
Capital expenditures (planned) M USD  ......  Subscription required
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 45.8   39.5   8.6  
Sustaining costs M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 10   11.4   4.9  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 265.9   276.5   244.5  
Gross profit M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 74.2  
After-tax Income M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 44.4   10.9   74.4  
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Heavy Mobile Equipment as of April 26, 2017:
HME TypeModelQuantity
Concrete sprayer ....................... Subscription required ....................... Subscription required
Drill (long hole) ....................... Subscription required ....................... Subscription required
Drill (long hole) ....................... Subscription required ....................... Subscription required
Drill (long hole) ....................... Subscription required ....................... Subscription required
Drill jumbo (two boom) ....................... Subscription required ....................... Subscription required
Explosives Charger ....................... Subscription required ....................... Subscription required
Grader ....................... Subscription required ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required ....................... Subscription required
Load-Haul-Dump (LHD) ....................... Subscription required ....................... Subscription required
Rock bolter ....................... Subscription required ....................... Subscription required
Trans Mixer ....................... Subscription required ....................... Subscription required
Truck (haul) ....................... Subscription required ....................... Subscription required
Subscription required - Subscription is required.

Mine Management:

Job TitleNameProfileRef. Date
....................... Subscription required ....................... Subscription required Subscription required Mar 11, 2021
....................... Subscription required ....................... Subscription required Subscription required Mar 11, 2021
....................... Subscription required ....................... Subscription required Subscription required Mar 11, 2021
....................... Subscription required ....................... Subscription required Subscription required Mar 11, 2021
Subscription required - Subscription is required.

Staff:

EmployeesContractorsTotal WorkforceYear
Subscription required Subscription required Subscription required 2016
Subscription required 2014

Corporate Filings & Presentations:

DocumentYear
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
Corporate Presentation 2018
Management Discussion & Analysis 2018
Press Release 2018
Year-end Mineral Reserves 2018
Annual Report 2017
Press Release 2017
Technical Report 2017
Year-end Mineral Reserves 2017
Annual Information Form 2016
Management Discussion & Analysis 2016
Annual Information Form 2015
Corporate Presentation 2015
Management Discussion & Analysis 2015
Year-end Mineral Reserves 2015
Technical Report 2013
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