Oro Grande Mine (Oro Grande group), Summit City, Meadow Lake Mining District, Nevada County, California, USAi
| Regional Level Types | |
|---|---|
| Oro Grande Mine (Oro Grande group) | Mine |
| Summit City | City |
| Meadow Lake Mining District | Mining District |
| Nevada County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 24' 11'' North , 120° 30' 28'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Kingvale | 143 (2011) | 11.4km |
| Sierra City | 221 (2011) | 21.1km |
| Sierraville | 200 (2011) | 24.0km |
| Washington | 185 (2011) | 25.5km |
| Truckee | 16,299 (2017) | 29.1km |
A former lode Cu-Au-Ag occurrence/mine located in sec. 27, T18N, R13E, MDM, 0.8 km (0.5 mile) SW of Summit City, WNW of Hartley Butte (9 miles N of Cisco), on National Forest land. Operated & owned by J. P. Clark and F. J. Cook (first year = 1908). MRDS database stated accuracy for this location is 1,000 meters. This mine was worked 45 years prior to 1908.
Mineralization is a vein deposit hosted in porphyry. The ore body strikes N85W and dips 72S at a thickness of 15.24 meters. Local rocks include Mesozoic volcanic rocks, unit 5 (Northern Sierra Nevada and Eastern Klamath Mountains) and/or Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).
Workings include underground opening comprised of a vertical shaft 32 feet deep, a 3-compartment vertical shaft at 125 feet, a 2-compartment vertical shaft at 105 feet, plus 200 feet of open cuts and a 30 foot adit on the vein.
Production of Cu was less than 100,000 pounds. Values reported were Cu at 5%, Au at $7 (period values) per ton and Ag at 3 ounces per ton.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Bornite Formula: Cu5FeS4 |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Bornite | 2.BA.15 | Cu5FeS4 |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Bornite | Cu5FeS4 |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Bornite | Cu5FeS4 |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Bornite | Cu5FeS4 |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS MRDS: | 10031988 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Shoofly-Olds Ferry 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 #0060570933
(1908, September) The Copper Resources of California. Bulletin 50. California State Mining Bureaup.199
