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Mammoth Gold Copper Mine, Sweetland, North San Juan Mining District, Nevada County, California, USAi
| Regional Level Types | |
|---|---|
| Mammoth Gold Copper Mine | Mine |
| Sweetland | - not defined - |
| North San Juan Mining District | Mining District |
| Nevada County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 20' 58'' North , 121° 8' 35'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| North San Juan | 269 (2011) | 4.0km |
| Dobbins | 624 (2011) | 5.9km |
| Rough and Ready | 963 (2011) | 13.3km |
| Lake Wildwood | 4,991 (2011) | 13.9km |
| Camptonville | 158 (2011) | 14.0km |
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 |
|---|---|---|
| Nevada County Gem & Mineral Society | Grass Valley, California | 16km |
| Feather River Lapidary & Mineral Society | Oroville, California | 40km |
| Sutter Buttes Gem & Mineral Society | Marysville, California | 45km |
A former Au-Cu occurrence/mine located in the NE¼NE¼NE¼ sec. 12, T17N, R7E, MDM, 2.1 km (1.3 miles) WNW of Sweetland, along the S side of Sweetland Creek, near its confluence with the Middle Yuba River (2½ miles SW of North San Juan). Operated/owned by G. W. Broyles (1908- ). MRDS database stated accuracy for this location is 100 meters.
Mineralization is a vein deposit hosted in slate. The ore body strikes N and dips 85E. Local rocks include Mesozoic volcanic rocks, unit 2 (Western Sierra Foothills and Western Klamath Mountains).
Workings include underground openings with a length of 12.19 meters and comprised of an adit near the level of the Yuba River, exposing the vein.
Reported values: 2% Cu; $3 (period values) Au/ton.
No production was recorded.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
2 valid minerals.
Detailed 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: | 10031679 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Foothills-Wallowa 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 #0060570047
(1908, September) The Copper Resources of California. Bulletin 50. California State Mining Bureaup.204
