Unnamed Cu-Mo-Ag-Au prospect [1], English Mountain, English Mountain Mining District, Nevada County, California, USAi
| Regional Level Types | |
|---|---|
| Unnamed Cu-Mo-Ag-Au prospect [1] | Prospect |
| English Mountain | Mountain |
| English Mountain Mining District | Mining District |
| Nevada County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 26' 16'' North , 120° 33' 36'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Sierra City | 221 (2011) | 15.6km |
| Kingvale | 143 (2011) | 17.2km |
| Washington | 185 (2011) | 22.3km |
| Sierraville | 200 (2011) | 23.6km |
| Downieville | 282 (2011) | 26.6km |
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 |
|---|---|---|
| Nevada County Gem & Mineral Society | Grass Valley, California | 49km |
A Cu-Mo-Ag-Au occurrence/prospect located in the SW¼ sec. 7, T18N, R13E, MDM, 1.2 km (0.8 mile) SW of English Mountain (coordinates of record) (on the SW slope of the mountain), N of Faucherie Lake. MRDS database accuracy for this location is not stated.
Mineralization is a vein deposit. The ore body is 7.62 meters long. The deposit is comprised of quartz veins, lenses and stringers in metavolcanic rocks. Their average thickness is 1 foot (0.31 meter). One vein is 3 feet (0.91 meter) thick, strikes N60-70E and dips 60S. Another is 4 feet (1.24 meters) thick, strikes N80E to E-W and dips 40S. Yet another is 1 foot thick and strikes N80E and dips steeply S. Molybdenite-bearing quartz veins are emplaced along E-W striking and steeply-dipping joint sets in granodiorite. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).
Workings include underground openings comprised of a 40 foot adit plus several drill holes.
2 tons of ore were mined and stockpiled in 1918.
Analytical data results: Assays across vein results: 0.315 to 0.163% Cu, 0.083 to 0.259% Mo, with traces of Au and 0.2 ounce Ag.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Molybdenite Formula: MoS2 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Molybdenite | 2.EA.30 | MoS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Molybdenite | MoS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Mo | Molybdenum | |
| Mo | ⓘ Molybdenite | MoS2 |
Other Databases
| Link to USGS MRDS: | 10031983 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Shoofly-Olds Ferry DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- Sierra NevadaMountain Range
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