Keystone Mine (Big Avalanche group), Loganville, Sierra City Mining District, Sierra County, California, USAi
| Regional Level Types | |
|---|---|
| Keystone Mine (Big Avalanche group) | Mine |
| Loganville | - not defined - |
| Sierra City Mining District | Mining District |
| Sierra County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 33' 3'' North , 120° 39' 36'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Sierra City | 221 (2011) | 2.8km |
| Downieville | 282 (2011) | 14.3km |
| Whitehawk | 113 (2011) | 21.0km |
| Valley Ranch | 109 (2011) | 22.3km |
| Calpine | 205 (2011) | 22.8km |
A former lode Au occurrence/mine located in sec. 31, T20N, R12E, MDM, 2.0 km (1.2 miles) SSE of Loganville and 2.9 km (1.8 miles) SW of Sierra City, on National Forest land. MRDS database stated accuracy for this location is 100 meters.
Mineralization is hosted in slate. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).
Workings include underground openings.
Production data are found in: MacBoyle (1920).
Mineralization is hosted in slate. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).
Workings include underground openings.
Production data are found in: MacBoyle (1920).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Native Gold Formula: Au |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native 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 | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10262287 |
|---|
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 #0060910528
