Brandy City Mining District, Sierra County, California, USAi
| Regional Level Types | |
|---|---|
| Brandy City Mining District | Mining District |
| Sierra County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
39° North , 120° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~49km
Type:
Köppen climate type:
NOTE: There is no USGS MRDS database for this district.
Location: This district is along the extreme west margin of Sierra County about 12 miles W of Downieville and 10 miles by road N of Camptonville. It is on the ridge between Canyon Creek on the N and the North Fork of the Yuba River on the S. It is principally a placer-mining district and was extensively hydraulicked from the 1850's until the early 1890's. Some work was done again from the early 1900's to the 1930's. The value of the total production of the district is unknown, but it probably amounts to several million dollars' worth of gold.
Geology: The main channel of the Tertiary-North Fork of the Yuba River, which is also known as the La Porte channel, extended in a SSW direction from Poverty Hill into this district and thence to Indian Hill. Pay gravel here is 700 to 800 feet wide, up to 200 feet thick, and overlain by 40 to 60 feet of andesite. The upper 130 feet of gravel are mostly pebbles; the lower portion is boulder-laden and well cemented. Bedrock is slate and serpentine with amphibolite both to the east and west.
The entire deposit is reported to have averaged 25¢/cubic yard in Au at the old price of gold, and near bedrock it was reported to have contained as much as $2.50/cubic yard in Au.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
Mineral list contains entries from the region specified including sub-localities2 valid minerals.
Detailed Mineral List:
| ⓘ Chromite Formula: Fe2+Cr3+2O4 |
| ⓘ Native Gold Formula: Au Localities: Reported from at least 6 localities in this region. Description: Placer material. Apparently somewhat argentiferous. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Localities in this Region
- California
- Sierra County
- Brandy City Mining District
- Sierra County
- California
- Sierra County
- Brandy City Mining District
- Sierra County
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
