Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography

Eagle Mine, Marquette Co., Michigan, USAi
Regional Level Types
Eagle MineMine
Marquette Co.County
MichiganState
USACountry

This page is currently not sponsored. Contact us for sponsorship opportunities.
Key
Latitude & Longitude (WGS84):
46° 44' 53'' North , 87° 52' 53'' West
Latitude & Longitude (decimal):
Owned/operated by:
Locality type:
Nearest Settlements:
PlacePopulationDistance
Big Bay319 (2017)13.9km
Michigamme271 (2017)29.4km
West Ishpeming2,662 (2017)32.5km
Ishpeming6,483 (2017)33.1km
Negaunee4,582 (2017)34.5km


The Eagle Ni-Cu-PGE deposit occurs in olivine-rich melagabbro, melatroctolite, and feldspathic peridotite units that were emplaced during the early stage of development of the Midcontinent Rift. Mineralization is characterized by the presence of two semi-massive sulfide zones in olivine-rich rocks that are linked by a zone of massive sulfides. Pyrrhotite, pentlandite, and chalcopyrite comprise the bulk of the sulfide mineral assemblage. Possibly formed in a magma conduit.

The Eagle deposit is a high-grade magmatic sulphide deposit containing nickel and copper mineralization and minor amounts of cobalt, precious and platinum group metals (PGMs).
The economic minerals associated with this deposit are predominately pentlandite and chalcopyrite.

Three distinct types of sulphide mineralization occur at the Eagle deposit. They are described as disseminated, semi-massive and massive sulphide. Massive sulphide is generally over 90% pyrrhotite-pentlandite-chalcopyrite. Semi-massive, or matrix ore, is 30% or greater net textured sulphide. Disseminated mineralization is generally uneconomic. The semi-massive and massive sulphides occur in separate zones called the Massive Sulphide, Semi-massive East, and Semi-massive West zones.

Eagle is a relatively shallow underground mine with access gained via a surface ramp that also serves as the route for waste, ore and backfill haulage. The mine employs transverse bench-and-fill stoping with mining in an up-dip primary secondary sequence. Backfilling is undertaken using cemented and uncemented rockfill. Two ventilation shafts are in place, with the downcast shaft also equipped for emergency egress. Ore from the mine is stored in a covered coarse ore stockpile facility prior to transport by road 105 km to the Humboldt mill site.

From a second covered coarse ore storage facility, the ore is processed using a conventional crush, grind and differential flotation process to produce separate nickel and copper concentrates. Tailings from the plant are deposited sub-aqueously in the adjacent former Humboldt iron ore open pit.

Nickel and copper concentrates are stored in a covered concentrate building on site prior to being transported via rail car direct to smelter facilities within North America or to ports for shipment overseas.

Mineral Reserves at Eagle are sufficient until 2024.

Both the mine and mill operate under a number of local, state and federal permits. First commercial concentrate production was achieved in the fourth quarter of 2014.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


12 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Baddeleyite
Formula: ZrO2
Reference: Good, D., Borysenko, J., McBride, J., Walford, P., Smyk, M., Hollings, P., ... & Corkery, J. (2010) Cu-Ni-PGE Deposits in Mafic Intrusions of the Lake Superior Region June 24-30, 2010. 11th International Platinum Symposium
Chalcopyrite
Formula: CuFeS2
Reference: Ware, Andrew, Cherry, Jon,, and Ding, Xin, 2008, Geology of the Eagle Project: Proceedings of the Institute on Lake Superior Geology, v. 54, Part 2 - Field Trip Guidebook, 87-114.; Xin Ding, Edward M. Ripley and Chusi Li (2012) PGE geochemistry of the Eagle Ni–Cu–(PGE) deposit, Upper Michigan: constraints on ore genesis in a dynamic magma conduit. Mineralium Deposita 47:89-104; Good, D., Borysenko, J., McBride, J., Walford, P., Smyk, M., Hollings, P., ... & Corkery, J. (2010) Cu-Ni-PGE Deposits in Mafic Intrusions of the Lake Superior Region June 24-30, 2010. 11th International Platinum Symposium
Cubanite
Formula: CuFe2S3
Reference: Ware, Andrew, Cherry, Jon,, and Ding, Xin, 2008, Geology of the Eagle Project: Proceedings of the Institute on Lake Superior Geology, v. 54, Part 2 - Field Trip Guidebook, 87-114.; Xin Ding, Edward M. Ripley and Chusi Li (2012) PGE geochemistry of the Eagle Ni–Cu–(PGE) deposit, Upper Michigan: constraints on ore genesis in a dynamic magma conduit. Mineralium Deposita 47:89-104; Good, D., Borysenko, J., McBride, J., Walford, P., Smyk, M., Hollings, P., ... & Corkery, J. (2010) Cu-Ni-PGE Deposits in Mafic Intrusions of the Lake Superior Region June 24-30, 2010. 11th International Platinum Symposium
'Fayalite-Forsterite Series'
Reference: Xin Ding, Edward M. Ripley and Chusi Li (2012) PGE geochemistry of the Eagle Ni–Cu–(PGE) deposit, Upper Michigan: constraints on ore genesis in a dynamic magma conduit. Mineralium Deposita 47:89-104; Good, D., Borysenko, J., McBride, J., Walford, P., Smyk, M., Hollings, P., ... & Corkery, J. (2010) Cu-Ni-PGE Deposits in Mafic Intrusions of the Lake Superior Region June 24-30, 2010. 11th International Platinum Symposium
Forsterite
Formula: Mg2SiO4
Reference: Good, D., Borysenko, J., McBride, J., Walford, P., Smyk, M., Hollings, P., ... & Corkery, J. (2010) Cu-Ni-PGE Deposits in Mafic Intrusions of the Lake Superior Region June 24-30, 2010. 11th International Platinum Symposium
Graphite
Formula: C
Reference: Good, D., Borysenko, J., McBride, J., Walford, P., Smyk, M., Hollings, P., ... & Corkery, J. (2010) Cu-Ni-PGE Deposits in Mafic Intrusions of the Lake Superior Region June 24-30, 2010. 11th International Platinum Symposium
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Dean Rossell and Steven Coombes ,April 29, 2005, THE GEOLOGY OF THE EAGLE NICKEL-COPPER DEPOSIT MICHIGAN, USA ; Kennecott Minerals Co.
Millerite
Formula: NiS
Reference: Dean Rossell and Steven Coombes ,April 29, 2005, THE GEOLOGY OF THE EAGLE NICKEL-COPPER DEPOSIT MICHIGAN, USA ; Kennecott Minerals Co.
Pentlandite
Formula: (FexNiy)Σ9S8
Reference: Ware, Andrew, Cherry, Jon,, and Ding, Xin, 2008, Geology of the Eagle Project: Proceedings of the Institute on Lake Superior Geology, v. 54, Part 2 - Field Trip Guidebook, 87-114.; Xin Ding, Edward M. Ripley and Chusi Li (2012) PGE geochemistry of the Eagle Ni–Cu–(PGE) deposit, Upper Michigan: constraints on ore genesis in a dynamic magma conduit. Mineralium Deposita 47:89-104; Good, D., Borysenko, J., McBride, J., Walford, P., Smyk, M., Hollings, P., ... & Corkery, J. (2010) Cu-Ni-PGE Deposits in Mafic Intrusions of the Lake Superior Region June 24-30, 2010. 11th International Platinum Symposium
Pyrite
Formula: FeS2
Reference: Ware, Andrew, Cherry, Jon,, and Ding, Xin, 2008, Geology of the Eagle Project: Proceedings of the Institute on Lake Superior Geology, v. 54, Part 2 - Field Trip Guidebook, 87-114.; Good, D., Borysenko, J., McBride, J., Walford, P., Smyk, M., Hollings, P., ... & Corkery, J. (2010) Cu-Ni-PGE Deposits in Mafic Intrusions of the Lake Superior Region June 24-30, 2010. 11th International Platinum Symposium
Pyrrhotite
Formula: Fe7S8
Reference: Ware, Andrew, Cherry, Jon,, and Ding, Xin, 2008, Geology of the Eagle Project: Proceedings of the Institute on Lake Superior Geology, v. 54, Part 2 - Field Trip Guidebook, 87-114.; Xin Ding, Edward M. Ripley and Chusi Li (2012) PGE geochemistry of the Eagle Ni–Cu–(PGE) deposit, Upper Michigan: constraints on ore genesis in a dynamic magma conduit. Mineralium Deposita 47:89-104; Good, D., Borysenko, J., McBride, J., Walford, P., Smyk, M., Hollings, P., ... & Corkery, J. (2010) Cu-Ni-PGE Deposits in Mafic Intrusions of the Lake Superior Region June 24-30, 2010. 11th International Platinum Symposium
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Reference: Dean Rossell and Steven Coombes ,April 29, 2005, THE GEOLOGY OF THE EAGLE NICKEL-COPPER DEPOSIT MICHIGAN, USA ; Kennecott Minerals Co.
Sphalerite
Formula: ZnS
Reference: Dean Rossell and Steven Coombes ,April 29, 2005, THE GEOLOGY OF THE EAGLE NICKEL-COPPER DEPOSIT MICHIGAN, USA ; Kennecott Minerals Co.
Violarite
Formula: Fe2+Ni3+2S4
Reference: Dean Rossell and Steven Coombes ,April 29, 2005, THE GEOLOGY OF THE EAGLE NICKEL-COPPER DEPOSIT MICHIGAN, USA ; Kennecott Minerals Co.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Cubanite2.CB.55aCuFe2S3
Millerite2.CC.20NiS
Pentlandite2.BB.15(FexNiy)Σ9S8
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Violarite2.DA.05Fe2+Ni3+2S4
Group 4 - Oxides and Hydroxides
Baddeleyite4.DE.35ZrO2
Magnetite4.BB.05Fe2+Fe3+2O4
Group 9 - Silicates
Forsterite9.AC.05Mg2SiO4
Unclassified Minerals, Rocks, etc.
'Fayalite-Forsterite Series'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Semi-metals and non-metals
Graphite1.3.6.2C
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 9:8
Pentlandite2.7.1.1(FexNiy)Σ9S8
AmXp, with m:p = 1:1
Millerite2.8.16.1NiS
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
Cubanite2.9.13.1CuFe2S3
AmBnXp, with (m+n):p = 3:4
Violarite2.10.1.8Fe2+Ni3+2S4
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
AX2
Baddeleyite4.4.14.1ZrO2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Forsterite51.3.1.2Mg2SiO4
Unclassified Minerals, Mixtures, etc.
'Fayalite-Forsterite Series'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn

List of minerals for each chemical element

HHydrogen
H Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
CCarbon
C GraphiteC
OOxygen
O MagnetiteFe2+Fe23+O4
O Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
O ForsteriteMg2SiO4
O BaddeleyiteZrO2
MgMagnesium
Mg Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Mg ForsteriteMg2SiO4
AlAluminium
Al Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
SiSilicon
Si Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Si ForsteriteMg2SiO4
SSulfur
S PyriteFeS2
S ChalcopyriteCuFeS2
S PyrrhotiteFe7S8
S CubaniteCuFe2S3
S Pentlandite(FexNiy)Σ9S8
S ViolariteFe2+Ni23+S4
S SphaleriteZnS
S MilleriteNiS
MnManganese
Mn Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
FeIron
Fe PyriteFeS2
Fe ChalcopyriteCuFeS2
Fe PyrrhotiteFe7S8
Fe CubaniteCuFe2S3
Fe Pentlandite(FexNiy)Σ9S8
Fe ViolariteFe2+Ni23+S4
Fe MagnetiteFe2+Fe23+O4
Fe Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
NiNickel
Ni Pentlandite(FexNiy)Σ9S8
Ni ViolariteFe2+Ni23+S4
Ni Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Ni MilleriteNiS
CuCopper
Cu ChalcopyriteCuFeS2
Cu CubaniteCuFe2S3
ZnZinc
Zn Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Zn SphaleriteZnS
ZrZirconium
Zr BaddeleyiteZrO2

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Ware, Andrew, Cherry, Jon, and Ding, Xin (2008), Geology of the Eagle Project: Proceedings of the Institute on Lake Superior Geology: volume 54, Part 2 - Field Trip Guidebook: 87-114.
Xin Ding, Edward M. Ripley and Chusi Li (2012) PGE geochemistry of the Eagle Ni–Cu–(PGE) deposit, Upper Michigan: constraints on ore genesis in a dynamic magma conduit. Mineralium Deposita: 47: 89-104.
Ding, Xin, Ripley, Edward M., Li, C., Geochemical and stable isotope studies of hydrothermal alteration associated with the Eagle deposit, northern Michigan: Proceedings of the Institute on Lake Superior Geology, volume 54, Part 1 – Program and Abstracts: 14-15.

External Links



This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
 
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2020, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: January 18, 2020 08:55:11 Page generated: August 12, 2019 16:15:48
Go to top of page