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Berkshire Mine (Pioneer Mine; Hoppenyan exploration), Mount Whittlesey, Gogebic Range, Ashland County, Wisconsin, USAi
| Regional Level Types | |
|---|---|
| Berkshire Mine (Pioneer Mine; Hoppenyan exploration) | Mine |
| Mount Whittlesey | Mountain |
| Gogebic Range | Mountain Range |
| Ashland County | County |
| Wisconsin | State |
| USA | Country |
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Latitude & Longitude (WGS84):
46° 17' 60'' North , 90° 37' 0'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Mellen | 700 (2017) | 4.4km |
| Glidden | 507 (2017) | 18.6km |
| Marengo | 111 (2017) | 20.5km |
| Birch Hill | 293 (2017) | 25.0km |
| Iron Belt | 173 (2017) | 25.1km |
Mine site ruins and outcrop on the west flank of Mt. Whittlesey in Sec 9 T44N R2W. Thick to thin bedded iron minerals and chert, typical banded iron formation. Due to the proximity of the Mellen igneous complex, the rocks have experienced relatively high grade contact metamorphism, with grunerite and magnetite reported as the dominant iron minerals. The deposit was initially developed as the Hoppenyan exploration in 1886-1887, when shafts were dug. The property was sold to the Pioneer Mining Company in 1917,and was worked as an open pit, shipping ore in 1922-1924. Recent attempts to open a new and enormous open pit iron mine in the area have not yet been realized (2015).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Almandine Formula: Fe2+3Al2(SiO4)3 |
| ⓘ Ankerite Formula: Ca(Fe2+,Mg)(CO3)2 |
| ⓘ Chamosite Formula: (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| ⓘ Chamosite var. Thuringite Formula: (Fe,Fe,Mg,Al)6(Si,Al)4O10(O,OH)8 |
| ⓘ 'Chlorite Group' |
| ⓘ Dolomite Formula: CaMg(CO3)2 |
| ⓘ 'Garnet Group' Formula: X3Z2(SiO4)3 |
| ⓘ Goethite Formula: Fe3+O(OH) |
| ⓘ Grunerite Formula: ◻{Fe2+2}{Fe2+5}(Si8O22)(OH)2 |
| ⓘ Hematite Formula: Fe2O3 |
| ⓘ Magnetite Formula: Fe2+Fe3+2O4 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Siderite Formula: FeCO3 |
| ⓘ Talc Formula: Mg3Si4O10(OH)2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Goethite | 4.00. | Fe3+O(OH) |
| ⓘ | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| ⓘ | Hematite | 4.CB.05 | Fe2O3 |
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Siderite | 5.AB.05 | FeCO3 |
| ⓘ | Ankerite | 5.AB.10 | Ca(Fe2+,Mg)(CO3)2 |
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
| Group 9 - Silicates | |||
| ⓘ | Almandine | 9.AD.25 | Fe2+3Al2(SiO4)3 |
| ⓘ | Grunerite | 9.DE.05 | ◻{Fe2+2}{Fe2+5}(Si8O22)(OH)2 |
| ⓘ | Talc | 9.EC.05 | Mg3Si4O10(OH)2 |
| ⓘ | Chamosite | 9.EC.55 | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| ⓘ | var. Thuringite | 9.EC.55 | (Fe,Fe,Mg,Al)6(Si,Al)4O10(O,OH)8 |
| Unclassified | |||
| ⓘ | 'Chlorite Group' | - | |
| ⓘ | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| H | ⓘ Goethite | Fe3+O(OH) |
| H | ⓘ Grunerite | ◻{Fe22+}{Fe52+}(Si8O22)(OH)2 |
| H | ⓘ Talc | Mg3Si4O10(OH)2 |
| H | ⓘ Chamosite var. Thuringite | (Fe,Fe,Mg,Al)6(Si,Al)4O10(O,OH)8 |
| C | Carbon | |
| C | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| C | ⓘ Siderite | FeCO3 |
| O | Oxygen | |
| O | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| O | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| O | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| O | ⓘ Goethite | Fe3+O(OH) |
| O | ⓘ Grunerite | ◻{Fe22+}{Fe52+}(Si8O22)(OH)2 |
| O | ⓘ Hematite | Fe2O3 |
| O | ⓘ Magnetite | Fe2+Fe23+O4 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Siderite | FeCO3 |
| O | ⓘ Talc | Mg3Si4O10(OH)2 |
| O | ⓘ Chamosite var. Thuringite | (Fe,Fe,Mg,Al)6(Si,Al)4O10(O,OH)8 |
| O | ⓘ Garnet Group | X3Z2(SiO4)3 |
| Mg | Magnesium | |
| Mg | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Mg | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| Mg | ⓘ Talc | Mg3Si4O10(OH)2 |
| Mg | ⓘ Chamosite var. Thuringite | (Fe,Fe,Mg,Al)6(Si,Al)4O10(O,OH)8 |
| Al | Aluminium | |
| Al | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| Al | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| Al | ⓘ Chamosite var. Thuringite | (Fe,Fe,Mg,Al)6(Si,Al)4O10(O,OH)8 |
| Si | Silicon | |
| Si | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| Si | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| Si | ⓘ Grunerite | ◻{Fe22+}{Fe52+}(Si8O22)(OH)2 |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Talc | Mg3Si4O10(OH)2 |
| Si | ⓘ Chamosite var. Thuringite | (Fe,Fe,Mg,Al)6(Si,Al)4O10(O,OH)8 |
| Si | ⓘ Garnet Group | X3Z2(SiO4)3 |
| Ca | Calcium | |
| Ca | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Fe | Iron | |
| Fe | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
| Fe | ⓘ Almandine | Fe32+Al2(SiO4)3 |
| Fe | ⓘ Chamosite | (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8 |
| Fe | ⓘ Goethite | Fe3+O(OH) |
| Fe | ⓘ Grunerite | ◻{Fe22+}{Fe52+}(Si8O22)(OH)2 |
| Fe | ⓘ Hematite | Fe2O3 |
| Fe | ⓘ Magnetite | Fe2+Fe23+O4 |
| Fe | ⓘ Siderite | FeCO3 |
| Fe | ⓘ Chamosite var. Thuringite | (Fe,Fe,Mg,Al)6(Si,Al)4O10(O,OH)8 |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Mid-continent DomainDomain
- Mid-continent RiftNarrow Rift
USA
- Midcontinent RiftGeologic Province
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