Gorham prospect (Gorham deposit), Lightner Peak, Foothill Copper Belt, Calaveras County, California, USAi
| Regional Level Types | |
|---|---|
| Gorham prospect (Gorham deposit) | Prospect |
| Lightner Peak | Peak |
| Foothill Copper Belt | Belt |
| Calaveras County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
37° 56' 6'' North , 120° 35' 1'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Copperopolis | 3,671 (2011) | 7.2km |
| Tuttletown | 668 (2011) | 12.6km |
| Jamestown | 3,433 (2011) | 14.2km |
| Chinese Camp | 126 (2011) | 15.0km |
| Angels Camp | 2,677 (2012) | 15.3km |
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 |
|---|---|---|
| Calaveras Gem & Mineral Society | Angels Camp, California | 15km |
| Mother Lode Mineral Society | Modesto, California | 49km |
A Mn prospect located in the SE¼ sec. 18, T1N, R13E, MDM, 1.2 km (0.7 mile) SSE of Lightner Peak (coordinates of record), N of Loucks Creek (6 MI SE OF COPPEROPOLIS). Discovered in 1918. MRDS database stated accuracy for this location is 1,000 meters.
NOTE: USGS MRDS file #10092002 presents MRDS file #10186905 as a related file. That file has no relationship to this locality whatever.
Mineralization is hosted in biotite-muscovite granitic gneiss. The ore body is 0.46 meter (1.5 feet) thick at a length of 15.24 meters (50 feet). It consists of unoxidized and partially oxidized rhodonite. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).
Analytical data results: The ore grade is 30 to 38% Mn.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Bementite Formula: Mn7Si6O15(OH)8 References: |
| ⓘ Rhodonite Formula: CaMn3Mn[Si5O15] References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 9 - Silicates | |||
|---|---|---|---|
| ⓘ | Rhodonite | 9.DK.05 | CaMn3Mn[Si5O15] |
| ⓘ | Bementite | 9.EE.05 | Mn7Si6O15(OH)8 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Bementite | Mn7Si6O15(OH)8 |
| O | Oxygen | |
| O | ⓘ Bementite | Mn7Si6O15(OH)8 |
| O | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Si | Silicon | |
| Si | ⓘ Bementite | Mn7Si6O15(OH)8 |
| Si | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Ca | Calcium | |
| Ca | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
| Mn | Manganese | |
| Mn | ⓘ Bementite | Mn7Si6O15(OH)8 |
| Mn | ⓘ Rhodonite | CaMn3Mn[Si5O15] |
Other Databases
| Link to USGS MRDS: | 10092002 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Foothills-Wallowa DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- California
- Mother Lode BeltBelt
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