Slate Mountain Mine, Slate Mountain, Slate Mountain District, Slate Mountains, El Dorado County, California, USAi
| Regional Level Types | |
|---|---|
| Slate Mountain Mine | Mine |
| Slate Mountain | Mountain |
| Slate Mountain District | Mining District |
| Slate Mountains | Mountain Range |
| El Dorado County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 50' 46'' North , 120° 43' 26'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Georgetown | 2,367 (2011) | 12.0km |
| Camino | 1,750 (2011) | 12.7km |
| Placerville | 10,650 (2017) | 14.5km |
| Pollock Pines | 6,871 (2017) | 15.2km |
| Coloma | 529 (2011) | 15.3km |
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 |
|---|---|---|
| El Dorado County Mineral and Gem Society | Placerville, California | 14km |
| Gold Country Treasure Seekers | Placerville, California | 14km |
| Roseville Rock Rollers | Roseville, California | 50km |
A former lode Au occurrence/mine located in the SE¼NW¼ sec. 35, T12N, R11E, MDM, 4.3 km (2.6 miles) NW of Slate Mountain, on the W slope of the Slate Mountains, and 4.5 km (2.8 miles) SSE of Georgetown, on either private or National Forest land. Operated by E. W. Little. Operated intermittently during the period 1921 to 1941 and in 1951. MRDS database stated accuracy for this location is 100 meters.
Mineralization is a vein deposit. The ore body is 2.44 meters thick. The vein varies from 1½ to 8 feet thick. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).
Workings include underground openings comprised of a 600 foot crosscut adit and 2,400 feet of drifts. A 10-stamp mill was erected on the property.
A small amount of Au was produced in 1951.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Cacoxenite Formula: Fe3+24AlO6(PO4)17(OH)12 · 75H2O Description: Occurs as micro-balls and radiating spheres perched on wavellite. |
| ⓘ Crandallite Formula: CaAl3(PO4)(PO3OH)(OH)6 Colour: Light buff to white Description: Sugary. |
| ⓘ Quartz Formula: SiO2 References: |
| ⓘ Quartz var. Smoky Quartz Formula: SiO2 |
| ⓘ Rutile Formula: TiO2 |
| ⓘ Strengite Formula: FePO4 · 2H2O |
| ⓘ Variscite Formula: AlPO4 · 2H2O Habit: Tabular; bladed; blocky Description: Transparent to milky. References: |
| ⓘ Wavellite Formula: Al3(PO4)2(OH)3 · 5H2O Habit: Prismatic Colour: Colourless; pale green (massive material) Description: Occurs as veins and crusts in quartz in well-formed prismatic crystals and massive material. References: |
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | var. Smoky Quartz | 4.DA.05 | SiO2 |
| ⓘ | Rutile | 4.DB.05 | TiO2 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Crandallite | 8.BL.10 | CaAl3(PO4)(PO3OH)(OH)6 |
| ⓘ | Strengite | 8.CD.10 | FePO4 · 2H2O |
| ⓘ | Variscite | 8.CD.10 | AlPO4 · 2H2O |
| ⓘ | Cacoxenite | 8.DC.40 | Fe3+24AlO6(PO4)17(OH)12 · 75H2O |
| ⓘ | Wavellite | 8.DC.50 | Al3(PO4)2(OH)3 · 5H2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Cacoxenite | Fe243+AlO6(PO4)17(OH)12 · 75H2O |
| H | ⓘ Crandallite | CaAl3(PO4)(PO3OH)(OH)6 |
| H | ⓘ Strengite | FePO4 · 2H2O |
| H | ⓘ Variscite | AlPO4 · 2H2O |
| H | ⓘ Wavellite | Al3(PO4)2(OH)3 · 5H2O |
| O | Oxygen | |
| O | ⓘ Cacoxenite | Fe243+AlO6(PO4)17(OH)12 · 75H2O |
| O | ⓘ Crandallite | CaAl3(PO4)(PO3OH)(OH)6 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Rutile | TiO2 |
| O | ⓘ Quartz var. Smoky Quartz | SiO2 |
| O | ⓘ Strengite | FePO4 · 2H2O |
| O | ⓘ Variscite | AlPO4 · 2H2O |
| O | ⓘ Wavellite | Al3(PO4)2(OH)3 · 5H2O |
| Al | Aluminium | |
| Al | ⓘ Cacoxenite | Fe243+AlO6(PO4)17(OH)12 · 75H2O |
| Al | ⓘ Crandallite | CaAl3(PO4)(PO3OH)(OH)6 |
| Al | ⓘ Variscite | AlPO4 · 2H2O |
| Al | ⓘ Wavellite | Al3(PO4)2(OH)3 · 5H2O |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Si | ⓘ Quartz var. Smoky Quartz | SiO2 |
| P | Phosphorus | |
| P | ⓘ Cacoxenite | Fe243+AlO6(PO4)17(OH)12 · 75H2O |
| P | ⓘ Crandallite | CaAl3(PO4)(PO3OH)(OH)6 |
| P | ⓘ Strengite | FePO4 · 2H2O |
| P | ⓘ Variscite | AlPO4 · 2H2O |
| P | ⓘ Wavellite | Al3(PO4)2(OH)3 · 5H2O |
| Ca | Calcium | |
| Ca | ⓘ Crandallite | CaAl3(PO4)(PO3OH)(OH)6 |
| Ti | Titanium | |
| Ti | ⓘ Rutile | TiO2 |
| Fe | Iron | |
| Fe | ⓘ Cacoxenite | Fe243+AlO6(PO4)17(OH)12 · 75H2O |
| Fe | ⓘ Strengite | FePO4 · 2H2O |
Other Databases
| Link to USGS MRDS: | 10007146 |
|---|
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 #0060170868
Slate Mountain Mine, Slate Mountain, Slate Mountain District, Slate Mountains, El Dorado County, California, USA