Central Exploration Mine, Central, Houghton Township, Keweenaw County, Michigan, USAi
| Regional Level Types | |
|---|---|
| Central Exploration Mine | Mine (Abandoned) |
| Central | Unincorporated Community |
| Houghton Township | Township |
| Keweenaw County | County |
| Michigan | State |
| USA | Country |
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Latitude & Longitude (WGS84):
47° 23' 56'' North , 88° 10' 38'' West
Latitude & Longitude (decimal):
Type:
Mine (Abandoned) - last checked 2019
Deposit first discovered:
1930
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Ahmeek | 146 (2017) | 19.9km |
| Copper City | 187 (2017) | 20.3km |
| Copper Harbor | 108 (2017) | 23.1km |
| Calumet | 703 (2017) | 26.8km |
| Laurium | 1,941 (2017) | 26.9km |
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
Local clubs are the best way to get access to collecting localities
| Club | Location | Distance |
|---|---|---|
| Copper Country Rock and Mineral Club | Dollar Bay, Michigan | 40km |
Discovered in 1930 by Calumet & Hecla, the Central Exploration worked a fissure vein on the famous Kearsarge Lode. The mine went into production from 1934-1936 and again from 1942-1945 during World War II. After the War however, it closed permanently. This is perhaps the best location in the Keweenaw for gem quality chlorastrolite, as well as fine specimens of copper, copper/silver "halfbreeds", and datolite nodules.
As of July 2015, this pile was crushed to create logging roads in the area and no longer exists.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
6 valid minerals.
Detailed Mineral List:
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Datolite Formula: CaB(SiO4)(OH) |
| ⓘ Native Copper Formula: Cu |
| ⓘ Native Silver Formula: Ag Description: Found on copper crystals in pile. References: |
| ⓘ Prehnite Formula: Ca2Al2Si3O10(OH)2 References: |
| ⓘ Pumpellyite-(Mg) Formula: Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH) |
| ⓘ Pumpellyite-(Mg) var. Chlorastrolite Formula: Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Copper | 1.AA.05 | Cu |
| ⓘ | Native Silver | 1.AA.05 | Ag |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| Group 9 - Silicates | |||
| ⓘ | Datolite | 9.AJ.20 | CaB(SiO4)(OH) |
| ⓘ | Pumpellyite-(Mg) | 9.BG.20 | Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH) |
| ⓘ | var. Chlorastrolite | 9.BG.20 | Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O |
| ⓘ | Prehnite | 9.DP.20 | Ca2Al2Si3O10(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Datolite | CaB(SiO4)(OH) |
| H | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| H | ⓘ Pumpellyite-(Mg) | Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH) |
| H | ⓘ Pumpellyite-(Mg) var. Chlorastrolite | Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O |
| B | Boron | |
| B | ⓘ Datolite | CaB(SiO4)(OH) |
| C | Carbon | |
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Datolite | CaB(SiO4)(OH) |
| O | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| O | ⓘ Pumpellyite-(Mg) | Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH) |
| O | ⓘ Pumpellyite-(Mg) var. Chlorastrolite | Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O |
| Mg | Magnesium | |
| Mg | ⓘ Pumpellyite-(Mg) | Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH) |
| Mg | ⓘ Pumpellyite-(Mg) var. Chlorastrolite | Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O |
| Al | Aluminium | |
| Al | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Al | ⓘ Pumpellyite-(Mg) | Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH) |
| Al | ⓘ Pumpellyite-(Mg) var. Chlorastrolite | Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O |
| Si | Silicon | |
| Si | ⓘ Datolite | CaB(SiO4)(OH) |
| Si | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Si | ⓘ Pumpellyite-(Mg) | Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH) |
| Si | ⓘ Pumpellyite-(Mg) var. Chlorastrolite | Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Datolite | CaB(SiO4)(OH) |
| Ca | ⓘ Prehnite | Ca2Al2Si3O10(OH)2 |
| Ca | ⓘ Pumpellyite-(Mg) | Ca2MgAl2[Si2O6OH][SiO4](OH)2(OH) |
| Ca | ⓘ Pumpellyite-(Mg) var. Chlorastrolite | Ca2MgAl2(Si2O7)(SiO4)(OH)2 · H2O |
| Cu | Copper | |
| Cu | ⓘ Native Copper | Cu |
| Ag | Silver | |
| Ag | ⓘ Native Silver | Ag |
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
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Central Exploration Mine, Central, Houghton Township, Keweenaw County, Michigan, USA