Amethyst Mine, South Fork group (South Fork Mine; Verdi; Honey Bee; Bullion; Amethyst; Amethyst Extension; Amethyst Ext; Phoebe; Lady Bug; Mable; Marguerite), Forest, Alleghany Mining District (Forest Mining District), Sierra County, California, USAi
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Latitude & Longitude (WGS84):
39° 29' 12'' North , 120° 50' 33'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Downieville | 282 (2011) | 8.2km |
| Pike | 134 (2011) | 14.4km |
| Washington | 185 (2011) | 14.6km |
| Camptonville | 158 (2011) | 18.1km |
| Sierra City | 221 (2011) | 19.9km |
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 | 35km |
A former lode Au occurrence/mine located in sec. 27, T19N, R10E, MDM, 1.0 km (0.7 mile) ESE of Forest along the crest of Pliocene Ridge (1 mile N of Alleghany), on private land within a National Forest area. MRDS database stated accuracy for this location is 1,000 meters. Mine is idle and inaccessible.
Mineralization is a vein deposit with ore shoots. The ore body strikes N02W and dips E. The main vein lies between 2 belts of serpentine and may be the same as the one at the South Fork Mine. 300 feet W is a shear zone vein with some quartz that strikes N and dips 60W. Several small ore shoots of high-grade ore occur at junctions of the main vein with minor branches. Local rocks include Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range).
Workings include unspecified surface openings and underground openings, including the Amethyst shaft.
Production data are found in: Ferguson, Henry G. & R.W. Gannett (1932).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Native Gold Formula: Au |
| ⓘ Quartz Formula: SiO2 |
| ⓘ 'Serpentine Subgroup' Formula: D3[Si2O5](OH)4 |
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 |
| Unclassified | |||
| ⓘ | 'Serpentine Subgroup' | - | D3[Si2O5](OH)4 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| O | Oxygen | |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Serpentine Subgroup | D3[Si2O5](OH)4 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10086523 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker 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 #0060910226
