City of Six Mine, Downieville, Downieville Mining District, Sierra County, California, USAi
| Regional Level Types | |
|---|---|
| City of Six Mine | Mine |
| Downieville | - not defined - |
| Downieville Mining District | Mining District |
| Sierra County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° 32' 4'' North , 120° 50' 11'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Downieville | 282 (2011) | 2.9km |
| Pike | 134 (2011) | 17.5km |
| Sierra City | 221 (2011) | 17.7km |
| Washington | 185 (2011) | 19.7km |
| Camptonville | 158 (2011) | 20.4km |
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 | 40km |
A former lode Au occurrence/mine located in the NE¼ sec. 10, T19N, R10E, MDM, about 3.5 km (2 miles) SSW of Downieville, along the W ridge of the West Fork Slug Canyon in the headwaters area, on National Forest land. MRDS database stated accuracy for this location is 100 meters. The Triple Pocket adjoins on the N and the Carson on the S.
Mineralization is a vein deposit hosted in serpentinite, slate and schist. The ore body strikes NW and dips 45E. The main vein follows a steep contact of slate and serpentine, sometimes running quartz stringers into the slate hanging wall. The footwall serpentine is mineralized in places with dolomite-quartz rock & bluejay. Some faulting nearly parallel to the strike & dip of the main contact, with mineralization probably simultaneous or soon after. Local rocks include Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range).
Workings include underground openings comprised of 2 adits. The first has 1,400 feet of backs on the vein. The second adit is 360 feet lower than the upper, and is 1,500 feet long with crosscuts.
Production data are found in: Logan, Clarence August (1929).
No other production record was found.
There was considerable milling ore.
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: | 10106530 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker 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 #0060910191
