Sherman Ranch occurrence (Hoeft lease [1918]), Nevada City, Nevada City Mining District, Nevada County, California, USAi
| Regional Level Types | |
|---|---|
| Sherman Ranch occurrence (Hoeft lease [1918]) | Occurrence |
| Nevada City | City |
| Nevada City Mining District | Mining District |
| Nevada County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 15' 25'' North , 121° 2' 43'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Nevada City | 3,152 (2017) | 2.4km |
| Grass Valley | 12,944 (2017) | 4.4km |
| Rough and Ready | 963 (2011) | 8.4km |
| Alta Sierra | 6,911 (2011) | 12.8km |
| North San Juan | 269 (2011) | 13.5km |
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 | 4km |
| Sutter Buttes Gem & Mineral Society | Marysville, California | 49km |
A Cr-Fe occurrence/mine located in the SW¼SE¼ sec. 11, T16N, R8E, MDM, about 2.6 km WSW of Nevada City proper, along the N side of Deer Creek, N of Glenbrook, on private land. Discovered and first produced in 1916. Owned by Isabelle C. Sherman, California (1976). Operated by Eleanor E. Hoeft (principal operator during WWI), California (1976). MRDS database stated accuracy for this location is 500 meters.
The ore body strikes N00E and dips 50S at a thickness of 0 meter. The ore body is disseminated, lenticular. The primary mode of origin was magmatic differentiation. Primary ore control was lithology. Wallrock alteration is intense (carbonitization). Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).
Workings include surface and underground openings comprised of a 47 foot inclined shaft and a drift from its bottom plus a small stope.
Approximately 500 to 600 tons of mine-run, disseminated ore carrying 10 to 15% Cr2O3 was taken to Champion mill to be concentrated. The concentrates from this ore contained about 32% Cr2O3, and a high Fe content. 146 long tons were shipped in 1918.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Chromite Formula: Fe2+Cr3+2O4 |
| ⓘ 'Fayalite-Forsterite Series' |
| ⓘ 'Pyroxene Group' Formula: ADSi2O6 |
| ⓘ 'Serpentine Subgroup' Formula: D3[Si2O5](OH)4 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
| Unclassified | |||
| ⓘ | 'Fayalite-Forsterite Series' | - | |
| ⓘ | 'Pyroxene Group' | - | ADSi2O6 |
| ⓘ | 'Serpentine Subgroup' | - | D3[Si2O5](OH)4 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| O | Oxygen | |
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| O | ⓘ Fayalite-Forsterite Series | |
| O | ⓘ Pyroxene Group | ADSi2O6 |
| O | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| Mg | Magnesium | |
| Mg | ⓘ Fayalite-Forsterite Series | |
| Si | Silicon | |
| Si | ⓘ Fayalite-Forsterite Series | |
| Si | ⓘ Pyroxene Group | ADSi2O6 |
| Si | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | ⓘ Fayalite-Forsterite Series | |
Other Databases
| Link to USGS MRDS: | 10031734 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Foothills-Wallowa 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 #0060570247
