Manganese Mine, Copper Harbor, Grant Township, Keweenaw County, Michigan, USAi
| Regional Level Types | |
|---|---|
| Manganese Mine | Mine (Overgrown) |
| Copper Harbor | Census-designated Place |
| Grant Township | Township |
| Keweenaw County | County |
| Michigan | State |
| USA | Country |
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Latitude & Longitude (WGS84):
47° 27' 17'' North , 87° 51' 54'' West
Latitude & Longitude (decimal):
Type:
Mine (Overgrown) - last checked 2024
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Copper Harbor | 108 (2017) | 2.3km |
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 ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded from this region.Mineral List
Mineral list contains entries from the region specified including sub-localities25 valid minerals. 1 (TL) - type locality of valid minerals. 1 erroneous literature entry.
Detailed Mineral List:
| ⓘ Analcime Formula: Na(AlSi2O6) · H2O |
| ⓘ Baryte Formula: BaSO4 |
| ⓘ Braunite Formula: Mn2+Mn3+6(SiO4)O8 |
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Chrysocolla Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| ⓘ Conichalcite ? Formula: CaCu(AsO4)(OH) |
| ⓘ Cuprite Formula: Cu2O |
| ⓘ Datolite Formula: CaB(SiO4)(OH) |
| ⓘ Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ Hematite Formula: Fe2O3 References: |
| ⓘ Hollandite Formula: Ba(Mn4+6Mn3+2)O16 |
| ⓘ Formula: Mn2+2(OH)3Cl |
| ⓘ Laumontite Formula: CaAl2Si4O12 · 4H2O |
| ⓘ Macfallite (TL) Formula: Ca2Mn3+3(SiO4)(Si2O7)(OH)3 Type Locality: References: Moore, Paul B., Ito, Jun, Steele, Ian M. (1979) MacFallite and orientite: calcium manganese (III) silicates from upper Michigan. Mineralogical Magazine, 43 (327) 325-331 doi:10.1180/minmag.1979.043.327.02 |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
| ⓘ Manganite Formula: Mn3+O(OH) |
| ⓘ Native Copper Formula: Cu |
| ⓘ Neltnerite Formula: CaMn3+6(SiO4)O8 |
| ⓘ Orientite Formula: Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O |
| ⓘ Prehnite Formula: Ca2Al2Si3O10(OH)2 |
| ⓘ Pumpellyite-(Mn2+) Formula: Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH) |
| ⓘ Pyrolusite Formula: Mn4+O2 |
| ⓘ Quartz Formula: SiO2 Locality: Lake Manganese Vein, Manganese Mine, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA References: Allan Blaske collectionIdentified by Paul Brandes: Visual Identification |
| ⓘ Ranciéite Formula: (Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O References: |
| ⓘ Tangeite Formula: CaCu(VO4)(OH) |
| ⓘ Volborthite Formula: Cu3(V2O7)(OH)2 · 2H2O |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Copper | 1.AA.05 | Cu |
| Group 3 - Halides | |||
| ⓘ | Kempite ? | 3.DA.10a | Mn2+2(OH)3Cl |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Cuprite | 4.AA.10 | Cu2O |
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Pyrolusite | 4.DB.05 | Mn4+O2 |
| ⓘ | Hollandite | 4.DK.05a | Ba(Mn4+6Mn3+2)O16 |
| ⓘ | Manganite | 4.FD.15 | Mn3+O(OH) |
| ⓘ | Ranciéite | 4.FL.40 | (Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Baryte | 7.AD.35 | BaSO4 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Conichalcite ? | 8.BH.35 | CaCu(AsO4)(OH) |
| ⓘ | Tangeite | 8.BH.35 | CaCu(VO4)(OH) |
| ⓘ | Volborthite | 8.FD.05 | Cu3(V2O7)(OH)2 · 2H2O |
| Group 9 - Silicates | |||
| ⓘ | Braunite | 9.AG.05 | Mn2+Mn3+6(SiO4)O8 |
| ⓘ | Neltnerite | 9.AG.05 | CaMn3+6(SiO4)O8 |
| ⓘ | Datolite | 9.AJ.20 | CaB(SiO4)(OH) |
| ⓘ | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| ⓘ | Macfallite (TL) | 9.BG.15 | Ca2Mn3+3(SiO4)(Si2O7)(OH)3 |
| ⓘ | Pumpellyite-(Mn2+) | 9.BG.20 | Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH) |
| ⓘ | Orientite | 9.BJ.05 | Ca8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O |
| ⓘ | Prehnite | 9.DP.20 | Ca2Al2Si3O10(OH)2 |
| ⓘ | Chrysocolla | 9.ED.20 | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| ⓘ | Analcime | 9.GB.05 | Na(AlSi2O6) · H2O |
| ⓘ | Laumontite | 9.GB.10 | CaAl2Si4O12 · 4H2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Analcime | Na(AlSi2O6) · H2O |
| H | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| H | ⓘ Conichalcite | CaCu(AsO4)(OH) |
| H | ⓘ Datolite | CaB(SiO4)(OH) |
| H | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| H | ⓘ Kempite | Mn22+(OH)3Cl |
| H | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| H | ⓘ Macfallite | Ca2Mn33+(SiO4)(Si2O7)(OH)3 |
| H | ⓘ Manganite | Mn3+O(OH) |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| H | ⓘ Orientite | Ca8Mn103+(SiO4)3(Si3O10)3(OH)10 · 4H2O |
| H | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| H | ⓘ Pumpellyite-(Mn2+) | Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH) |
| H | ⓘ Ranciéite | (Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O |
| H | ⓘ Tangeite | CaCu(VO4)(OH) |
| H | ⓘ Volborthite | Cu3(V2O7)(OH)2 · 2H2O |
| B | Boron | |
| B | ⓘ Datolite | CaB(SiO4)(OH) |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Analcime | Na(AlSi2O6) · H2O |
| O | ⓘ Baryte | BaSO4 |
| O | ⓘ Braunite | Mn2+Mn63+(SiO4)O8 |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| O | ⓘ Conichalcite | CaCu(AsO4)(OH) |
| O | ⓘ Cuprite | Cu2O |
| O | ⓘ Datolite | CaB(SiO4)(OH) |
| O | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Hollandite | Ba(Mn64+Mn23+)O16 |
| O | ⓘ Kempite | Mn22+(OH)3Cl |
| O | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| O | ⓘ Macfallite | Ca2Mn33+(SiO4)(Si2O7)(OH)3 |
| O | ⓘ Manganite | Mn3+O(OH) |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Neltnerite | CaMn63+(SiO4)O8 |
| O | ⓘ Orientite | Ca8Mn103+(SiO4)3(Si3O10)3(OH)10 · 4H2O |
| O | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| O | ⓘ Pumpellyite-(Mn2+) | Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH) |
| O | ⓘ Pyrolusite | Mn4+O2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Ranciéite | (Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O |
| O | ⓘ Tangeite | CaCu(VO4)(OH) |
| O | ⓘ Volborthite | Cu3(V2O7)(OH)2 · 2H2O |
| Na | Sodium | |
| Na | ⓘ Analcime | Na(AlSi2O6) · H2O |
| Al | Aluminium | |
| Al | ⓘ Analcime | Na(AlSi2O6) · H2O |
| Al | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Al | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Al | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| Al | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Al | ⓘ Pumpellyite-(Mn2+) | Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH) |
| Si | Silicon | |
| Si | ⓘ Analcime | Na(AlSi2O6) · H2O |
| Si | ⓘ Braunite | Mn2+Mn63+(SiO4)O8 |
| Si | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | ⓘ Datolite | CaB(SiO4)(OH) |
| Si | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| Si | ⓘ Macfallite | Ca2Mn33+(SiO4)(Si2O7)(OH)3 |
| Si | ⓘ Neltnerite | CaMn63+(SiO4)O8 |
| Si | ⓘ Orientite | Ca8Mn103+(SiO4)3(Si3O10)3(OH)10 · 4H2O |
| Si | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Si | ⓘ Pumpellyite-(Mn2+) | Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH) |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Baryte | BaSO4 |
| Cl | Chlorine | |
| Cl | ⓘ Kempite | Mn22+(OH)3Cl |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Conichalcite | CaCu(AsO4)(OH) |
| Ca | ⓘ Datolite | CaB(SiO4)(OH) |
| Ca | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ca | ⓘ Laumontite | CaAl2Si4O12 · 4H2O |
| Ca | ⓘ Macfallite | Ca2Mn33+(SiO4)(Si2O7)(OH)3 |
| Ca | ⓘ Neltnerite | CaMn63+(SiO4)O8 |
| Ca | ⓘ Orientite | Ca8Mn103+(SiO4)3(Si3O10)3(OH)10 · 4H2O |
| Ca | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Ca | ⓘ Pumpellyite-(Mn2+) | Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH) |
| Ca | ⓘ Ranciéite | (Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O |
| Ca | ⓘ Tangeite | CaCu(VO4)(OH) |
| V | Vanadium | |
| V | ⓘ Tangeite | CaCu(VO4)(OH) |
| V | ⓘ Volborthite | Cu3(V2O7)(OH)2 · 2H2O |
| Mn | Manganese | |
| Mn | ⓘ Braunite | Mn2+Mn63+(SiO4)O8 |
| Mn | ⓘ Hollandite | Ba(Mn64+Mn23+)O16 |
| Mn | ⓘ Kempite | Mn22+(OH)3Cl |
| Mn | ⓘ Macfallite | Ca2Mn33+(SiO4)(Si2O7)(OH)3 |
| Mn | ⓘ Manganite | Mn3+O(OH) |
| Mn | ⓘ Neltnerite | CaMn63+(SiO4)O8 |
| Mn | ⓘ Orientite | Ca8Mn103+(SiO4)3(Si3O10)3(OH)10 · 4H2O |
| Mn | ⓘ Pumpellyite-(Mn2+) | Ca2Mn2+Al2[Si2O6OH][SiO4](OH)2(OH) |
| Mn | ⓘ Pyrolusite | Mn4+O2 |
| Mn | ⓘ Ranciéite | (Ca,Mn2+)0.2(Mn4+,Mn3+)O2 · 0.6H2O |
| Fe | Iron | |
| Fe | ⓘ Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | ⓘ Hematite | Fe2O3 |
| Cu | Copper | |
| Cu | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Cu | ⓘ Conichalcite | CaCu(AsO4)(OH) |
| Cu | ⓘ Cuprite | Cu2O |
| Cu | ⓘ Native Copper | Cu |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Cu | ⓘ Tangeite | CaCu(VO4)(OH) |
| Cu | ⓘ Volborthite | Cu3(V2O7)(OH)2 · 2H2O |
| As | Arsenic | |
| As | ⓘ Conichalcite | CaCu(AsO4)(OH) |
| Ba | Barium | |
| Ba | ⓘ Baryte | BaSO4 |
| Ba | ⓘ Hollandite | Ba(Mn64+Mn23+)O16 |
Localities in this Region
- Michigan
- Keweenaw County
- Grant Township
- Copper Harbor
- Manganese Mine
- Copper Harbor
- Grant Township
- Keweenaw County
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Mid-continent DomainDomain
- Mid-continent RiftNarrow Rift
USA
- Michigan
- Keweenaw PeninsulaPeninsula
- Midcontinent RiftGeologic Province
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
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References
Moore, Paul B., Ito, Jun, Steele, Ian M. (1979) MacFallite and orientite: calcium manganese (III) silicates from upper Michigan. Mineralogical Magazine, 43 (327) 325-331 doi:10.1180/minmag.1979.043.327.02
Morris, Tom (1983) Michigan Mineralogy. A locality Index. Rocks & Minerals, 58 (3). 107-113 doi:10.1080/00357529.1983.11767128p.111
Manganese Mine, Copper Harbor, Grant Township, Keweenaw County, Michigan, USA