Granite Hill (Granite Hill vein; Granite Hill Qtz), Grass Valley, Grass Valley Mining District, Nevada County, California, USAi
| Regional Level Types | |
|---|---|
| Granite Hill (Granite Hill vein; Granite Hill Qtz) | Hill |
| Grass Valley | Valley |
| Grass Valley Mining District | Mining District |
| Nevada County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 12' 22'' North , 121° 4' 1'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Grass Valley | 12,944 (2017) | 1.5km |
| Rough and Ready | 963 (2011) | 6.5km |
| Alta Sierra | 6,911 (2011) | 7.2km |
| Nevada City | 3,152 (2017) | 7.5km |
| Penn Valley | 1,621 (2011) | 10.8km |
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 | 2km |
| Sutter Buttes Gem & Mineral Society | Marysville, California | 46km |
A former lode Au occurrence/mine located in sec. 34, T16N, R8E, MDM, about 1.5 km SSW of Grass Valley proper, on private (patented) land. The property comprises 2.791 acres or 17.17 acres (2 MRDS files). MRDS database stated accuracy for this location is 1,000 meters.
Mineralization is a vein deposit hosted in granodiorite. The ore body strikes E of N and dips 25-50W at a thickness of 0.76 meter. The vein is 3 inches (7.5 cm) to 2.5 (76 cm) feet thick and carries up to 6% sulfides. 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 609.6 meters and an overall depth of 182.88 meters and comprised of an incline and drifts.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Native Gold Formula: Au Description: Occurs as leaf gold in cavities lined with quartz crystals. References: |
| ⓘ Quartz Formula: SiO2 Description: Occurs as crystals lining caviteis with leaf gold. References: |
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 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Calcite | CaCO3 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10007451 |
|---|
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 #0060570429
