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Gibsonville property (Six 6 claims), Gibsonville, Gibsonville Mining District, Sierra County, California, USAi
| Regional Level Types | |
|---|---|
| Gibsonville property (Six 6 claims) | Property |
| Gibsonville | - not defined - |
| Gibsonville Mining District | Mining District |
| Sierra County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 44' 34'' North , 120° 52' 41'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Plumas Eureka (historical) | 339 (2011) | 14.7km |
| Plumas Eureka | 339 (2017) | 20.1km |
| Cromberg | 261 (2011) | 20.6km |
| Downieville | 282 (2011) | 20.8km |
| Greenhorn | 236 (2011) | 21.0km |
A former Cr occurrence/mine located in sec. 29, T22N, R10E, MDM, along the E slope of Sawmill Ridge and the East Branch Slate Creek, on National Forest land. Discovered by W. T. Baldwin, L.L. Clough and G.W. Chamberlain. Owned by: Claim Nos. 1 to 5: Baldwin, Clough & Chamberlain; Claim No.6: Clough. Operated in 1917 & 1918. Rediscovered in 1942 (?). MRDS database stated accuracy for this location is 500 meters.
The ore body(ies) is/are lenticular in form. Claim No. 1 ore body strikes E and dips 85S; No. 2 ore body strikes N45E and dips 80NW; No. 6 ore body is chimney-shaped. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains).
Workings included unspecified surface openings.
Production data are found in: Rynearson, Garn Arthur (1953).
Total production was 172 long tons of ore containing 44% Cr2O3 shipped during the period 1917 to 1918.
Analytical data results: Ore ranged from 38% to 45% Cr2O3.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Magnesiochromite Formula: MgCr2O4 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Magnesiochromite | 4.BB.05 | MgCr2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Magnesiochromite | MgCr2O4 |
| Mg | Magnesium | |
| Mg | ⓘ Magnesiochromite | MgCr2O4 |
| Cr | Chromium | |
| Cr | ⓘ Magnesiochromite | MgCr2O4 |
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker 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 #0060910385
