Spanish Fraction Lode Mine (Spanish), Indian Flat, Nevada City Mining District, Nevada County, California, USAi
| Regional Level Types | |
|---|---|
| Spanish Fraction Lode Mine (Spanish) | Mine |
| Indian Flat | Flat |
| Nevada City Mining District | Mining District |
| Nevada County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 16' 25'' North , 121° 2' 38'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Nevada City | 3,152 (2017) | 2.6km |
| Grass Valley | 12,944 (2017) | 6.2km |
| Rough and Ready | 963 (2011) | 9.3km |
| North San Juan | 269 (2011) | 11.8km |
| Lake Wildwood | 4,991 (2011) | 14.2km |
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 | 6km |
| Sutter Buttes Gem & Mineral Society | Marysville, California | 49km |
A former lode Au-Cu-Pb occurrence/mine located in the SE¼ sec. 2 & in the NE¼ sec. 11, T16N, R8E, MDM, 1.2 km (0.8 mile) ENE of Indian Flat (coordinates of record), S of Cement Hill and Cement Hill Road, N of highway 49 (¾ mile NW of Nevada City). MRDS database accuracy for this location is not stated.
Mineralization is hosted in granodiorite. The ore body strikes NW and dips 42NE at a thickness of 1.83 meters. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).
Workings include underground openings with a length of 304.8 meters and an overall depth of 82.3 meters and comprised of a tunnel, inclined shaft, stopes and a drift adit.
Production data are found in: Hobson, John B. & E.A. Wiltsee (1893).
production information: Concentrates averaged $75 to $175 (period values) Au/ton.
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: | 10007342 |
|---|
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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