Philadelphia Mine, Alcalde Mine group (Alcade; Eclipse; Hidden Treasure; Accidental; Oxford; Diamond; Philadelphia; Stonewall Jackson; Johnson; Gould; Curry; South Curry; Indiana and South Standard claims), Grass Valley, Grass Valley Mining District, Nevada County, California, USAi
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Latitude & Longitude (WGS84):
39° 11' 28'' North , 121° 7' 13'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Rough and Ready | 963 (2011) | 4.5km |
| Grass Valley | 12,944 (2017) | 6.0km |
| Penn Valley | 1,621 (2011) | 6.1km |
| Alta Sierra | 6,911 (2011) | 7.9km |
| Lake Wildwood | 4,991 (2011) | 8.3km |
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 | 41km |
A former lode Au occurrence/claim/mine located in secs. 5 & 6, T15N, R8E, MDM, about 6.5 km (3.9 miles) WSW of Grass Valley proper, S of Deadmans Flat and N of American Ranch Hill. MRDS database accuracy for this location is not stated. One of 13 claims in the Alcade group.
Mineralization is a vein deposit. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).
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: | 10007319 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Foothills-Wallowa DomainDomain
- Sierra Nevada BatholithVolcanic Arc
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