Alpha Quartz Mine (Alpha Qtz), Golden Gate group (Golden Gate Gp; Kentucky & Alpha; Golden Gate; Golden Gate East and West; Dana claim; Christopher Columbus claim; Golden Gate claim; Alpha claim; Ismert Ranch claim), Grass Valley, Grass Valley Mining District, Nevada County, California, USAi
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Latitude & Longitude (WGS84):
39° 13' 19'' North , 121° 2' 14'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Grass Valley | 12,944 (2017) | 2.1km |
| Nevada City | 3,152 (2017) | 4.7km |
| Rough and Ready | 963 (2011) | 8.6km |
| Alta Sierra | 6,911 (2011) | 9.0km |
| Penn Valley | 1,621 (2011) | 13.6km |
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 | 48km |
A former lode Au occurrence/mine located in secs. 25 & 26, T16N, R8E, MDM, about 1 mile E of Grass Valley, on private (patented) land. The property comprises 3.40 acres. MRDS database accuracy for this location is not stated.
Mineralization is hosted in serpentinite. The ore body dips 30-34N at a thickness of 0.61 meter. The vein is 20 to 24 inches (50 to 60 cm) thick. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).
Workings include underground openings with an overall depth 36.58 meters.
No other production record was found.
List of minerals for each chemical element
Other Databases
| Link to USGS MRDS: | 10101295 |
|---|
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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