Movatterモバイル変換

[0]ホーム
URL:

Log InRegister
AboutSupport UsPhotosDiscussionsSearchLearnMore
Quick Links :The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
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 ElementsThe Rock H. Currier Digital LibraryGeologic Time
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 MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Mendota Mine, Mount Bohemia, Lac La Belle, Grant Township, Keweenaw County, Michigan, USAi
Regional Level Types
Mendota MineMine
Mount BohemiaMountain
Lac La BelleUnincorporated Community
Grant TownshipTownship
Keweenaw CountyCounty
MichiganState
USACountry

This page is currently not sponsored.Click here to sponsor this page.
PhotosMapsSearch
Standard
All Photos (21)Specimen Photos (19)Locality Photos (2)Photos by ColorGalleryPhoto StatisticsAdd Photo
Map PagesNearest LocalitiesUse Map in Article
Mineral SearchSimilar LocalitiesNearest LocalitiesPredictive MineralogySearch Google
Latitude & Longitude (WGS84):
47° 23' 30'' North , 88° 0' 47'' West
Latitude & Longitude (decimal):
47.39167,-88.01306
GRN:
N32W44
Type:
Mine
Köppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Copper Harbor108(2017)12.7km
Copper City187(2017)30.6km
Ahmeek146(2017)30.7km
Laurium1,941(2017)36.7km
Calumet703(2017)36.9km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Copper Country Rock and Mineral ClubDollar Bay, Michigan48km
Mindat Locality ID:
16083
Long-form identifier:
mindat:1:2:16083:7
GUID (UUID V4):
0


An underground copper mine consisting of five shafts near the ghost town of Mandan. The Mendota Mining Company was organized in 1865; however, mining was taking place as early as 1855 under Meteor Mining Company management. Three of the shafts were sunk under Meteor management, with the other two shafts being more exploration shafts sunk under Mendota control. With the price of copper during the American Civil War rising, investors formed the Company and quickly built a smelter and stamp mill on nearby Lac La Belle. The ore that came from these shafts was different than most places; a black/gray sulphate which the company mined until 1873 when it was realized it could not turn a profit and the mine closed for good. If the piles can be found, the “black/gray sulphate” mineral the mine discovered can still be collected; today, we call it chalcocite. It is said that bornite, malachite, and chrysocholla can also be found. Local collectors say the piles are great for micros.

Select Mineral List Type

StandardDetailedGalleryStrunzChemical Elements

Commodity List

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


Mineral List


9 valid minerals.

Detailed Mineral List:

ⓘAlbite
Formula:Na(AlSi3O8)
ⓘAlbite var. Oligoclase
Formula:(Na,Ca)[Al(Si,Al)Si2O8]
ⓘBornite
Formula:Cu5FeS4
References:
Dana 6: 1086.
ⓘCalcite
Formula:CaCO3
ⓘChalcocite
Formula:Cu2S
ⓘChalcopyrite
Formula:CuFeS2
ⓘChrysocolla
Formula:Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x< 1
ⓘ'Feldspar Group'
ⓘGypsum
Formula:CaSO4 · 2H2O
✪Malachite
Formula:Cu2(CO3)(OH)2
Habit: tufts to 1cm
Description: Best in Michigan
ⓘNative Copper
Formula:Cu

Gallery:

CaCO3ⓘCalcite
Cu2SⓘChalcocite
Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x< 1ⓘChrysocolla
Cu2(CO3)(OH)2ⓘMalachite

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Copper1.AA.05Cu
Group 2 - Sulphides and Sulfosalts
ⓘChalcocite2.BA.05Cu2S
ⓘBornite2.BA.15Cu5FeS4
ⓘChalcopyrite2.CB.10aCuFeS2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘMalachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘGypsum7.CD.40CaSO4 · 2H2O
Group 9 - Silicates
ⓘChrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
ⓘAlbite9.FA.35Na(AlSi3O8)
ⓘvar. Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Unclassified
ⓘ'Feldspar Group'-

List of minerals for each chemical element

HHydrogen
HⓘChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x< 1
HⓘGypsumCaSO4 · 2H2O
HⓘMalachiteCu2(CO3)(OH)2
CCarbon
CⓘCalciteCaCO3
CⓘMalachiteCu2(CO3)(OH)2
OOxygen
OⓘAlbiteNa(AlSi3O8)
OⓘCalciteCaCO3
OⓘChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x< 1
OⓘGypsumCaSO4 · 2H2O
OⓘMalachiteCu2(CO3)(OH)2
OⓘAlbite var.Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
NaSodium
NaⓘAlbiteNa(AlSi3O8)
NaⓘAlbite var.Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
AlAluminium
AlⓘAlbiteNa(AlSi3O8)
AlⓘChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x< 1
AlⓘAlbite var.Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
SiSilicon
SiⓘAlbiteNa(AlSi3O8)
SiⓘChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x< 1
SiⓘAlbite var.Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
SSulfur
SⓘBorniteCu5FeS4
SⓘChalcopyriteCuFeS2
SⓘChalcociteCu2S
SⓘGypsumCaSO4 · 2H2O
CaCalcium
CaⓘCalciteCaCO3
CaⓘGypsumCaSO4 · 2H2O
CaⓘAlbite var.Oligoclase(Na,Ca)[Al(Si,Al)Si2O8]
FeIron
FeⓘBorniteCu5FeS4
FeⓘChalcopyriteCuFeS2
CuCopper
CuⓘBorniteCu5FeS4
CuⓘChalcopyriteCuFeS2
CuⓘChalcociteCu2S
CuⓘChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x< 1
CuⓘNative CopperCu
CuⓘMalachiteCu2(CO3)(OH)2

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

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, pleaseregister so you can add to our database. This locality information is for reference purposes only. You should never attempt tovisit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holdersfor access and that you are aware of all safety precautions necessary.

References

Dana, Edward Salisbury; Dana, James Dwight (1892)A System of Mineralogy (6th ed.). John Wiley & Sons, Inc.
Morris, Tom (1983) Michigan Mineralogy. A locality Index.Rocks & Minerals, 58 (3). 107-113doi:10.1080/00357529.1983.11767128p.111
The Copper Country Rock & Mineral Club (2001) Red Gold and Tarnished Silver, 2nd edition. Self-Published. 44 pages.
Heinrich, E. W., Robinson, George Willard (2004)Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Kaminski-Hamka, T. (2011) The Copper Mines of Keweenaw County, Michigan. Copperlady Press. 150 pages.
DeGood, L. (2011) Michigan Copper Mining Stocks and Bonds. 401 pages.
Quick NavTopCommoditiesMineral ListOther RegionsReferences
 
and/or 
Mindat.org is an outreach project of theHudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2025, except where stated. Most political location boundaries are© OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 byJolyon Ralph.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844.doi:10.2138/am-2024-9486.
Privacy Policy -Terms & Conditions -Contact Us / DMCA issues -Report a bug/vulnerabilityCurrent server date and time: November 28, 2025 21:01:02 Page updated: November 5, 2025 02:52:24