Jim Crow Mine, Cornish House, American Hill Mining District, Sierra County, California, USAi
| Regional Level Types | |
|---|---|
| Jim Crow Mine | Mine |
| Cornish House | - not defined - |
| American Hill Mining District | Mining District |
| Sierra County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 32' 17'' North , 120° 45' 12'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Downieville | 282 (2011) | 6.7km |
| Sierra City | 221 (2011) | 10.7km |
| Washington | 185 (2011) | 20.2km |
| Pike | 134 (2011) | 23.7km |
| Plumas Eureka (historical) | 339 (2011) | 24.8km |
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 | 44km |
A former lode Au occurrence/prospect/mine located in secs. 4, 5, 8 & 9, T19N, R11E, MDM, about 5 km NE of Cornish House, S of Quartz Point summit, N of Shannon Ravine (tributary of Jim Crow Creek), and E of Jim Crow Creek, on National Forest land. MRDS database stated accuracy for this location is 500 meters. Other locations in secs. 5, 8 & 9.
Mineralization is a vein deposit hosted in slate and granite. The ore body is a pinch-and-swell body that strikes N and dips 45E at a thickness of 0.91 meter. Two quartz fissure veins varying from 6 inches (15 cm) to 3 feet (0.91 meter) in thickness. The N extension has a slate footwall and a granite hanging wall. The blanket vein has sdlate on both walls with a dip of 10E. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).
Workings include underground openings with an overall length of 457.2 meters and comprised of a shaft and adit.
Production data are found in: MacBoyle, Errol (1920b).
No other production record was found.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsGallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| 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 |
| Au | Gold | |
| Au | ⓘ Gold | Au |
Other Databases
| Link to USGS MRDS: | 10034784 |
|---|
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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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060910407
