Geach property, Grass Valley, Grass Valley Mining District, Nevada County, California, USAi
| Regional Level Types | |
|---|---|
| Geach property | Property |
| Grass Valley | Valley |
| Grass Valley Mining District | Mining District |
| Nevada County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 13' 32'' North , 121° 1' 54'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Grass Valley | 12,944 (2017) | 2.6km |
| Nevada City | 3,152 (2017) | 4.2km |
| Rough and Ready | 963 (2011) | 9.0km |
| Alta Sierra | 6,911 (2011) | 9.5km |
| Penn Valley | 1,621 (2011) | 14.1km |
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 | 3km |
| Sutter Buttes Gem & Mineral Society | Marysville, California | 49km |
Mindat Locality ID:
84124
Long-form identifier:
mindat:1:2:84124:2
GUID (UUID V4):
b3082110-0338-41d0-af53-cf4a2f1b3e79
A former Cr occurrence/mine located in the NW¼ sec. 25, T16N, R8E, MDM, about 2.8 km ENE of Grass Valley proper, E of Hills Flat, ESE of the Sierra Nevada Memorial Hospital, on the N side of Wolf Creek. Operated by C. W. and W. J. Jenkins (lessees). MRDS database stated accuracy for this location is 500 meters.
Local rocks include ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains).
Workings include underground openings comprised of a 20 foot deep shaft with a short drift and underhand stope at the bottom.
About 40 long tons had been mined when the property was examined in 1918. Lessees reported that they mined and shipped 43 long tons of ore containing 34.27% Cr2O3 in 1918. Most of this ore probably came from this deposit, though some may have come from the Davey property in this same section, which was also leased by the Jenkins.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsGallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
Other Databases
| Link to USGS MRDS: | 10031767 |
|---|
Other Regions, Features and Areas containing this locality
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060570343
