Jumbo Mine, Barton, West Point Mining District, East Belt, Amador County, California, USAi
| Regional Level Types | |
|---|---|
| Jumbo Mine | Mine |
| Barton | Unincorporated Community |
| West Point Mining District | Mining District |
| East Belt | - not defined - |
| Amador County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 26' 3'' North , 120° 31' 0'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Buckhorn | 2,429 (2017) | 2.3km |
| West Point | 674 (2011) | 4.0km |
| Pioneer | 1,094 (2011) | 4.8km |
| Red Corral | 1,413 (2017) | 8.1km |
| Volcano | 115 (2017) | 10.0km |
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 |
|---|---|---|
| Amador County Gem & Mineral Society | Sutter Creek, California | 25km |
| Calaveras Gem & Mineral Society | Angels Camp, California | 41km |
| El Dorado County Mineral and Gem Society | Placerville, California | 41km |
| Gold Country Treasure Seekers | Placerville, California | 41km |
A former lode Au-Cu occurrence/mine located in the SW¼ sec. 26, T7N, R13E, MDM, about 3 km SSE of Barton, on the W ridge overlooking the North Fork Mokelumne River (about 2 miles SE of the Buckhorn Lodge), on private land. Discovered in 1950. Operated by Behrend Deecher, George Viscovich, and Steve Miloservich. MRDS database stated accuracy for this location is 1,000 meters.
Mineralization is a vein deposit hosted in granodiorite. The ore body strikes N and dips 90 at a thickness of 1.83 meters and a length of 914.4 meters. Quartz stringers are 1 to 3 inches (2.5 to 7.5 cm) in quartz pockets in a 6 foot (1.83 meters) wide mineralized zone. The vein outcrops for 3,000 feet and is vertical but dips W at the N end of the exposure. Gold occurs with quartz, some pyrite, and less chalcopyrite and malachite. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).
Workings include surface and underground openings with a length of 25.91 meters and comprised of 2 adits at 20 and 65 feet plus a 20 foot open cut. Exploratory work was being carried out by Jenex Gold Corporation including a geophysical and geochemical surveys (December, ____). (Data truncated by the USGS MRDS database)
No production was recorded but Au assay values were $12 (period values) per ton on parts of the vein in the second adit; $12 (period values) per ton in the open cut, and $121 (period values) per ton in the main zone in the lower level. Hanging wall samples in granite varied between $14 and $28 (period values) per ton.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
| ⓘ Native Gold Formula: Au |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | 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 | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10028346 |
|---|
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 #0060050425
