Oro Grande II Mine (Black Diamond; Scheerer), Oro Grande, Oro Grande Mining District, San Bernardino County, California, USAi
| Regional Level Types | |
|---|---|
| Oro Grande II Mine (Black Diamond; Scheerer) | Mine |
| Oro Grande | - not defined - |
| Oro Grande Mining District | Mining District |
| San Bernardino County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
34° 35' 42'' North , 117° 19' 24'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Victorville | 122,225 (2017) | 7.2km |
| Adelanto | 33,166 (2017) | 8.0km |
| Mountain View Acres | 3,130 (2018) | 11.2km |
| Spring Valley Lake | 8,220 (2017) | 12.3km |
| Apple Valley | 72,174 (2017) | 16.4km |
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 |
|---|---|---|
| Victor Valley Gem and Mineral Club | Victorville, California | 7km |
| Mojave Desert Gem & Mineral Society | Barstow, California | 43km |
A former Au occurrence/mine located in sec. 20, T6N, R4W, SBM, 1.0 km (0.6 mile) ESE of Oro Grande, on private land. MRDS database stated accuracy for this location is 500 meters.
NOTE: USGS MRDS database file #10035605 places this mine in the S½NW¼ sec. 35, T6N, R4E, SBM, at coordinates 34.56473, -117.26171, and otherwise states "either same or adjacent to Oro Grande I." Oro Grande I Mine is located in sec. sec. 35, T7N, R4W, not sec. 35, T6N, R4E. Also, the topo map reflects "Oro Grande Mines in the plural in sec. 35, T7N, R4W, indicating perhaps both mines. The coordinates from MRDS file #10116669 place this mine in sec. 20 at a shaft symbol on the topo map. There is obvious uncertainty concerning the location of this mine.
Mineralization is a vein deposit hosted in andesite. The ore body strikes N15W and dips 70W at a thickness of 3.66 meters. The vein is a few inches to 12 feet thick and contains quartz and brecciated wall rock. The andesite dikes are dark gray, non-porphyritic. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges) and/or Carboniferous marine rocks, unit 1 (Western Mojave Desert).
Workings include underground openings comprised of an open cut 200 feet long by 10 to 25 feet wide and 20 feet deep, plus a 120 foot shaft sunk on the floor of the cut and a 40 foot shaft 200 feet to the SE.
Analytical data results: Milled ore ran $4.50 (period values) Au/ton.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Native Gold Formula: Au |
| ⓘ Quartz Formula: SiO2 |
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 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10035605 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mojave DomainDomain
- Southern Basin and RangeWide Rift
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file #0060711860
