Black Oak Mine, Weimar, Colfax Mining District (Illinois Mining District), Placer County, California, USAi
| Regional Level Types | |
|---|---|
| Black Oak Mine | Mine |
| Weimar | - not defined - |
| Colfax Mining District (Illinois Mining District) | Mining District |
| Placer County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 1' 1'' North , 120° 56' 34'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Meadow Vista | 3,217 (2011) | 7.1km |
| Colfax | 2,005 (2017) | 9.4km |
| Lake of the Pines | 3,917 (2011) | 10.1km |
| Foresthill | 1,483 (2011) | 10.8km |
| Auburn Lake Trails | 3,426 (2011) | 11.4km |
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 | 25km |
| El Dorado County Mineral and Gem Society | Placerville, California | 34km |
| Gold Country Treasure Seekers | Placerville, California | 34km |
| Roseville Rock Rollers | Roseville, California | 42km |
Mindat Locality ID:
85102
Long-form identifier:
mindat:1:2:85102:7
GUID (UUID V4):
0a27172b-1d38-45fc-8c07-ea078b0aee1e
A former lode Au occurrence/mine located in the E½SW¼ sec. 35, T14N, R9E, MDM, 3.4 km (2.1 miles) SE of Weimar and 3.6 km (2.2 miles) SE of New England Mills, along the W side of Jefferson Canyon. MRDS database stated accuracy for this location is 500 meters. This mine was claimed to have been an important producer, but no official record is available.
Mineralization is a vein deposit. The ore body is pinch & swell in form, strikes N10W and dips 52E at a thickness of 5.49 meters. The footwall is a hard dike. The vein is a few inches to 18 feet thick and carries 3% sulfides. Local rocks include Jurassic marine rocks, unit 1 (Western Sierra Nevada and Western Klamath Mountains).
Workings include underground openings with a length of 457.2 meters and an overall depth of 177.39 meters, and comprised of several adits and shafts.
Analytical data results: Estimated assay at $5.60 to $9.00 (period values) Au/ton.
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 2 - Sulphides and Sulfosalts | |||
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| 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 |
| S | Sulfur | |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Au | Gold | |
| Au | ⓘ Gold | Au |
Other Databases
| Link to USGS MRDS: | 10101364 |
|---|
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References
