Hudson Bay Quartz Mine (Hudson Bay Qtz; Hudson Bay; Blue Ridge vein), Grass Valley, Grass Valley Mining District, Nevada County, California, USAi
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Latitude & Longitude (WGS84):
39° 11' 53'' North , 121° 4' 44'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Grass Valley | 12,944 (2017) | 2.8km |
| Rough and Ready | 963 (2011) | 6.1km |
| Alta Sierra | 6,911 (2011) | 6.6km |
| Nevada City | 3,152 (2017) | 8.8km |
| Penn Valley | 1,621 (2011) | 9.7km |
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 | 45km |
A former lode Au occurrence/mine located in sec. 33, T16N, R8E, MDM, about 3 km SSW of Grass Valley proper, at The Punchbowl, on private (patented) land. The property comprises 6.8 acres. MRDS database stated accuracy for this location is 500 meters.
Mineralization is a vein deposit hosted in diabase. The ore body strikes N and dips 30W. The vein averages 1 foot (0.31 meter) in thickness. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains) and/or Mesozoic gabbroic rocks, unit 2 (undivided).
Workings include underground openings with an overall depth of 42.67 meters and comprised of a shaft.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsGallery:
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 |
| ⓘ | Opal | 4.DA.10 | SiO2 · nH2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Opal | SiO2 · nH2O |
| O | Oxygen | |
| O | ⓘ Opal | SiO2 · nH2O |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Opal | SiO2 · nH2O |
| Si | ⓘ Quartz | SiO2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10101265 |
|---|
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 #0060570380
