Dart and Braden Capco leases (Horseshoe claim; Port Wine claim), Hughes Mill, Forest Hill Divide area, Placer County, California, USAi
| Regional Level Types | |
|---|---|
| Dart and Braden Capco leases (Horseshoe claim; Port Wine claim) | - not defined - |
| Hughes Mill | - not defined - |
| Forest Hill Divide area | Area |
| Placer County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 6' 9'' North , 120° 46' 36'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Foresthill | 1,483 (2011) | 9.8km |
| Alta | 610 (2011) | 11.9km |
| Dutch Flat | 160 (2011) | 12.7km |
| Colfax | 2,005 (2017) | 15.2km |
| Georgetown | 2,367 (2011) | 22.4km |
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 | 28km |
| El Dorado County Mineral and Gem Society | Placerville, California | 41km |
| Gold Country Treasure Seekers | Placerville, California | 41km |
Mindat Locality ID:
85232
Long-form identifier:
mindat:1:2:85232:7
GUID (UUID V4):
174b276b-bff9-4a2c-b3ad-4c0193824a77
A former Cr occurrence/pair of claims/mine located in sec. 30 & in the center SW¼NE¼ (assumed) sec. 31, T15N, R11E, MDM, 1.3 km (0.8 mile) NNE of Hughes Mill, E of Finning Mill Road, on National Forest land. Owned by L.E. & J.W. Drone. Operated by R.N. Knudsen. MRDS database stated accuracy for this location is 1,000 meters.
This is one of many Cr deposits/mines placed into a very large area termed the "Forest Hill Divide area" by Rynearson. That area is based on geological and topographic considerations versus mining districts and overlaps several defined districts. Those Cr occurrences within mining districts are listed under their respective districts, the remainder are listed under Rynearson’s "Forest Hill Divide area."
Mineralization is hosted in dunite. The ore body is lenticular. This deposit occurs in the easternmost of 3 sub-parallel belts of ultramafic rocks that trend northward across Placer County. Local rocks include ultramafic rocks, chiefly Mesozoic, unit 2 (Western Sierra Nevada and Klamath Mountains).
Workings include surface openings comprised of an irregula4r open cut and several pits. A small washing plant was operated on the Horseshoe claim in the NE¼NE¼ sec. 30.
Production data are found in: Rynearson, Garn Arthur (1953).
Production statistics: Year: 1942 (con. Cr ore): 47.39% Cr2O3.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsGallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
Other Databases
| Link to USGS MRDS: | 10043566 |
|---|
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References
