Log InRegister
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 Quiz
Photo SearchPhoto GalleriesSearch by ColorNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Manganese Mine, Copper Harbor, Grant Township, Keweenaw County, Michigan, USAi
Regional Level Types
Manganese MineMine (Overgrown)
Copper HarborUnincorporated Community
Grant TownshipTownship
Keweenaw CountyCounty
MichiganState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Latitude & Longitude (WGS84):
47° 27' 17'' North , 87° 51' 54'' West
Latitude & Longitude (decimal):
47.45491,-87.86503
GeoHash:
G#: f03tbwfsu
GRN:
N32W44
Type:
Mine (Overgrown) - last checked 2024
KΓΆppen climate type:
Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Copper Harbor108 (2017)2.3km
Mindat Locality ID:
3852
Long-form identifier:
mindat:1:2:3852:5
GUID (UUID V4):
5f41c2aa-e3dd-4895-90f3-21f6f7a776fb


The Manganese Mine is one of the more interesting mines of the Keweenaw. Manganese minerals were discovered south of Copper Harbor by geologist Douglass Houghton in the 1830s. In 1881, an open cut to a depth of 75 ft (ca. 23 m) was mined by the Cambria Iron Co. and approx. 800 tons of material was removed. In 1883, a shaft was sunk and another 400 tons of manganese ore was removed for assay. It was determined that the ore was unsuitable for steel production, and the mine was abandoned.

The piles, if found through 120 years of overgrowth, can produce some excellent micro-minerals. It is the only site on the Keweenaw where specimens such as orientite, braunite, and macfallite are found.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

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


Mineral List


24 valid minerals. 1 (TL) - type locality of valid minerals. 1 erroneous literature entry.

Detailed Mineral List:

β“˜ Analcime
Formula: Na(AlSi2O6) · H2O
β“˜ Baryte
Formula: BaSO4
β“˜ Braunite
Formula: Mn2+Mn3+6(SiO4)O8
β“˜ Calcite
Formula: CaCO3
β“˜ Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
β“˜ Conichalcite ?
Formula: CaCu(AsO4)(OH)
β“˜ Copper
Formula: Cu
β“˜ Cuprite
Formula: Cu2O
β“˜ Datolite
Formula: CaB(SiO4)(OH)
β“˜ Epidote
Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
β“˜ Hematite
Formula: Fe2O3
β“˜ Hollandite
Formula: Ba(Mn4+6Mn3+2)O16
β“˜ Kempite
Formula: Mn2+2(OH)3Cl
β“˜ Laumontite
Formula: CaAl2Si4O12 · 4H2O
β“˜ Macfallite (TL)
Formula: Ca2Mn3+3(SiO4)(Si2O7)(OH)3
Type Locality:
β“˜ Malachite
Formula: Cu2(CO3)(OH)2
β“˜ Manganite
Formula: Mn3+O(OH)
β“˜ Neltnerite
Formula: CaMn3+6(SiO4)O8
β“˜ Orientite
Formula: Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O
β“˜ Prehnite
Formula: Ca2Al2Si3O10(OH)2
β“˜ Pumpellyite-(Mn2+)
Formula: Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
β“˜ Pyrolusite
Formula: Mn4+O2
β“˜ RanciΓ©ite
Formula: (Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O
β“˜ Tangeite
Formula: CaCu(VO4)(OH)
β“˜ Volborthite
Formula: Cu3(V2O7)(OH)2 · 2H2O

Gallery:

Ca2Mn3+3(SiO4)(Si2O7)(OH)3β“˜ Macfallite (TL)
CaMn3+6(SiO4)O8β“˜ Neltnerite
Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O β“˜ Orientite
Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2Oβ“˜ Pumpellyite-(Mn2+)
Mn4+O2β“˜ Pyrolusite
(Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2Oβ“˜ RanciΓ©ite
CaCu(VO4)(OH)β“˜ Tangeite
Cu3(V2O7)(OH)2 · 2H2Oβ“˜ Volborthite

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
β“˜Copper1.AA.05Cu
Group 3 - Halides
β“˜Kempite ?3.DA.10aMn2+2(OH)3Cl
Group 4 - Oxides and Hydroxides
β“˜Cuprite4.AA.10Cu2O
β“˜Hematite4.CB.05Fe2O3
β“˜Pyrolusite4.DB.05Mn4+O2
β“˜Hollandite4.DK.05aBa(Mn4+6Mn3+2)O16
β“˜Manganite4.FD.15Mn3+O(OH)
β“˜RanciΓ©ite4.FL.40(Ca,Mn2+)0.2(Mn4+,Mn3+)O2 Β· 0.6H2O
Group 5 - Nitrates and Carbonates
β“˜Calcite5.AB.05CaCO3
β“˜Malachite5.BA.10Cu2(CO3)(OH)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
β“˜Baryte7.AD.35BaSO4
Group 8 - Phosphates, Arsenates and Vanadates
β“˜Tangeite8.BH.35CaCu(VO4)(OH)
β“˜Conichalcite ?8.BH.35CaCu(AsO4)(OH)
β“˜Volborthite8.FD.05Cu3(V2O7)(OH)2 Β· 2H2O
Group 9 - Silicates
β“˜Neltnerite9.AG.05CaMn3+6(SiO4)O8
β“˜Braunite9.AG.05Mn2+Mn3+6(SiO4)O8
β“˜Datolite9.AJ.20CaB(SiO4)(OH)
β“˜Epidote9.BG.05a(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
β“˜Macfallite (TL)9.BG.15Ca2Mn3+3(SiO4)(Si2O7)(OH)3
β“˜Pumpellyite-(Mn2+)9.BG.20Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 Β· H2O
β“˜Orientite9.BJ.05Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10 Β· 4H2O
β“˜Prehnite9.DP.20Ca2Al2Si3O10(OH)2
β“˜Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 Β· nH2O, x < 1
β“˜Analcime9.GB.05Na(AlSi2O6) Β· H2O
β“˜Laumontite9.GB.10CaAl2Si4O12 Β· 4H2O

List of minerals for each chemical element

HHydrogen
Hβ“˜ AnalcimeNa(AlSi2O6) · H2O
Hβ“˜ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Hβ“˜ ConichalciteCaCu(AsO4)(OH)
Hβ“˜ DatoliteCaB(SiO4)(OH)
Hβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Hβ“˜ KempiteMn22+(OH)3Cl
Hβ“˜ LaumontiteCaAl2Si4O12 · 4H2O
Hβ“˜ MacfalliteCa2Mn33+(SiO4)(Si2O7)(OH)3
Hβ“˜ ManganiteMn3+O(OH)
Hβ“˜ MalachiteCu2(CO3)(OH)2
Hβ“˜ OrientiteCa8Mn103+(SiO4)3(Si3O10)3(OH)10 · 4H2O
Hβ“˜ PrehniteCa2Al2Si3O10(OH)2
Hβ“˜ Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
Hβ“˜ RanciΓ©ite(Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O
Hβ“˜ TangeiteCaCu(VO4)(OH)
Hβ“˜ VolborthiteCu3(V2O7)(OH)2 · 2H2O
BBoron
Bβ“˜ DatoliteCaB(SiO4)(OH)
CCarbon
Cβ“˜ CalciteCaCO3
Cβ“˜ MalachiteCu2(CO3)(OH)2
OOxygen
Oβ“˜ AnalcimeNa(AlSi2O6) · H2O
Oβ“˜ BaryteBaSO4
Oβ“˜ BrauniteMn2+Mn63+(SiO4)O8
Oβ“˜ CalciteCaCO3
Oβ“˜ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Oβ“˜ ConichalciteCaCu(AsO4)(OH)
Oβ“˜ CupriteCu2O
Oβ“˜ DatoliteCaB(SiO4)(OH)
Oβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Oβ“˜ HematiteFe2O3
Oβ“˜ HollanditeBa(Mn64+Mn23+)O16
Oβ“˜ KempiteMn22+(OH)3Cl
Oβ“˜ LaumontiteCaAl2Si4O12 · 4H2O
Oβ“˜ MacfalliteCa2Mn33+(SiO4)(Si2O7)(OH)3
Oβ“˜ ManganiteMn3+O(OH)
Oβ“˜ MalachiteCu2(CO3)(OH)2
Oβ“˜ NeltneriteCaMn63+(SiO4)O8
Oβ“˜ OrientiteCa8Mn103+(SiO4)3(Si3O10)3(OH)10 · 4H2O
Oβ“˜ PrehniteCa2Al2Si3O10(OH)2
Oβ“˜ Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
Oβ“˜ PyrolusiteMn4+O2
Oβ“˜ RanciΓ©ite(Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O
Oβ“˜ TangeiteCaCu(VO4)(OH)
Oβ“˜ VolborthiteCu3(V2O7)(OH)2 · 2H2O
NaSodium
Naβ“˜ AnalcimeNa(AlSi2O6) · H2O
AlAluminium
Alβ“˜ AnalcimeNa(AlSi2O6) · H2O
Alβ“˜ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Alβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Alβ“˜ LaumontiteCaAl2Si4O12 · 4H2O
Alβ“˜ PrehniteCa2Al2Si3O10(OH)2
Alβ“˜ Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
SiSilicon
Siβ“˜ AnalcimeNa(AlSi2O6) · H2O
Siβ“˜ BrauniteMn2+Mn63+(SiO4)O8
Siβ“˜ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Siβ“˜ DatoliteCaB(SiO4)(OH)
Siβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Siβ“˜ LaumontiteCaAl2Si4O12 · 4H2O
Siβ“˜ MacfalliteCa2Mn33+(SiO4)(Si2O7)(OH)3
Siβ“˜ NeltneriteCaMn63+(SiO4)O8
Siβ“˜ OrientiteCa8Mn103+(SiO4)3(Si3O10)3(OH)10 · 4H2O
Siβ“˜ PrehniteCa2Al2Si3O10(OH)2
Siβ“˜ Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
SSulfur
Sβ“˜ BaryteBaSO4
ClChlorine
Clβ“˜ KempiteMn22+(OH)3Cl
CaCalcium
Caβ“˜ CalciteCaCO3
Caβ“˜ ConichalciteCaCu(AsO4)(OH)
Caβ“˜ DatoliteCaB(SiO4)(OH)
Caβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Caβ“˜ LaumontiteCaAl2Si4O12 · 4H2O
Caβ“˜ MacfalliteCa2Mn33+(SiO4)(Si2O7)(OH)3
Caβ“˜ NeltneriteCaMn63+(SiO4)O8
Caβ“˜ OrientiteCa8Mn103+(SiO4)3(Si3O10)3(OH)10 · 4H2O
Caβ“˜ PrehniteCa2Al2Si3O10(OH)2
Caβ“˜ Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
Caβ“˜ RanciΓ©ite(Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O
Caβ“˜ TangeiteCaCu(VO4)(OH)
VVanadium
Vβ“˜ TangeiteCaCu(VO4)(OH)
Vβ“˜ VolborthiteCu3(V2O7)(OH)2 · 2H2O
MnManganese
Mnβ“˜ BrauniteMn2+Mn63+(SiO4)O8
Mnβ“˜ HollanditeBa(Mn64+Mn23+)O16
Mnβ“˜ KempiteMn22+(OH)3Cl
Mnβ“˜ MacfalliteCa2Mn33+(SiO4)(Si2O7)(OH)3
Mnβ“˜ ManganiteMn3+O(OH)
Mnβ“˜ NeltneriteCaMn63+(SiO4)O8
Mnβ“˜ OrientiteCa8Mn103+(SiO4)3(Si3O10)3(OH)10 · 4H2O
Mnβ“˜ Pumpellyite-(Mn2+)Ca2Mn2+Al2(Si2O7)(SiO4)(OH)2 · H2O
Mnβ“˜ PyrolusiteMn4+O2
Mnβ“˜ RanciΓ©ite(Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O
FeIron
Feβ“˜ Epidote(CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH)
Feβ“˜ HematiteFe2O3
CuCopper
Cuβ“˜ ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1
Cuβ“˜ ConichalciteCaCu(AsO4)(OH)
Cuβ“˜ CupriteCu2O
Cuβ“˜ CopperCu
Cuβ“˜ MalachiteCu2(CO3)(OH)2
Cuβ“˜ TangeiteCaCu(VO4)(OH)
Cuβ“˜ VolborthiteCu3(V2O7)(OH)2 · 2H2O
AsArsenic
Asβ“˜ ConichalciteCaCu(AsO4)(OH)
BaBarium
Baβ“˜ BaryteBaSO4
Baβ“˜ HollanditeBa(Mn64+Mn23+)O16

Other Regions, Features and Areas containing this locality

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, 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.

References

(n.d.)
Butler, B.S., Burbank, W.S. (1929) The Copper Deposits of Michigan. U.S. Geological Survey. Professional Paper 144. 238 pages.
Clarke, D.H. (1974) Copper Mines of Keweenaw; Clark Mining Company, No. 3, 23 pp.
Moore, P.B., Ito, Jun, and Steele, I.M. (1979) MacFallite and Orientite: Calcium Manganese (III) Silicates from Upper Michigan. Mineralogical Magazine, 43, 325-331.
Morris Jr., T. (1983) Michigan Mineralogy: A Locality Index. Rocks & Minerals: 58(3): 111.
Blaske, A.R., Bornhorst, T.J., Johnson, A.M., Rantti, G.E., and Reed, R.C. (1988) Manganese Investigation in Keweenaw County, Michigan. Michigan Geological Survey Division, Open File Report OFR 88-2, 36 pp.
Nickel, Ernest H., Nichols, Monte C. (1991) Mineral Reference Manual. Van Nostrand Reinhold, New York.
Heinrich, E. W., Robinson, George Willard (2004) Mineralogy of Michigan (2nd ed.) A.E. Seaman Mineral Museum and Michigan Technological University. 252pp.
Rosemeyer, T. (2014) History and Mineralogy of the Manganese Mine, Keweenaw County, Michigan. Rocks & Minerals, 89: 498-515.
Carlson, S.M., Olds, T.A., Rascona, J., and Smith, A.E. (2014) A new locality for volborthite from the Manganese Mine, Copper Harbor, Michigan. Mineral News, 30(2): 1 ff.
Olds, T.A., Carlson, S.M., Behnke, D., and Mills, O.P. (2014) A New Find of Manganese-rich Pumpellyite from the Manganese Mine, Copper Harbor, Keweenaw County, Michigan. Rocks & Minerals, 89(6): 548-553.
Quick NavTopCommoditiesMineral ListOther RegionsReferences
 
Mineral and/or Locality  
Mindat Discussions Facebook Logo Instagram Logo Discord Logo
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2024, except where stated. Most political location boundaries are Β© OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: April 25, 2024 22:33:45 Page updated: March 23, 2024 18:29:04
Go to top of page