Brandy City Mining District, Sierra Co., California, USAi
| Regional Level Types | |
|---|---|
| Brandy City Mining District | Mining District |
| Sierra Co. | County |
| California | State |
| USA | Country |
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Key
Latitude & Longitude (WGS84):
39° North , 121° West (est.)
Estimate based on other nearby localities or region boundaries.
Margin of Error:
~4km
Locality 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.
Regions containing this locality
| North America Plate | Tectonic Plate |
Select Mineral List Type
Standard Detailed Strunz Dana Chemical ElementsMineral List
Mineral list contains entries from the region specified including sub-localities2 valid minerals.
Detailed Mineral List:
| ⓘ Chromite Formula: Fe2+Cr3+2O4 Reference: U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia. |
| ⓘ Gold Formula: Au Localities: Brandy City Mining Company Mine (Brandy City Mine; Brandy City diggings), Brandy City, Brandy City Mining District, Sierra Co., California, USA Cherab-Nuile Hill Placer Mine, Brandy City, Brandy City Mining District, Sierra Co., California, USA Christmas Tree Placer Mine, Brandy City, Brandy City Mining District, Sierra Co., California, USA Grissly Hill Hydraulic Mine, Brandy City, Brandy City Mining District, Sierra Co., California, USA |
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
List of minerals arranged by Dana 8th Edition classification
| Group 1 - NATIVE ELEMENTS AND ALLOYS | |||
|---|---|---|---|
| Metals, other than the Platinum Group | |||
| ⓘ | Gold | 1.1.1.1 | Au |
| Group 7 - MULTIPLE OXIDES | |||
| AB2X4 | |||
| ⓘ | Chromite | 7.2.3.3 | 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 | ⓘ Gold | Au |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Turner, Henry Ward (1898a), Description of the gold belt; description of the Bidwell Bar sheet: USGS Geologic Atlas, Bidwell Bar folio (Folio No. 43), 6 pp.
Taylor, George P. (1910), The Brandy City hydraulic mines, Sierra County, Engineering and Mining Journal: 89 (June 4, 1910): 1152-1153.
Lindgren, Waldemar (1911), The Tertiary gravels of the Sierra Nevada of California: USGS Professional Paper 73, 226 pp.: 101.
MacBoyle, Errol (1918), Sierra County, The Brandy City district: California Mining Bureau (Report 16): 6-8, 66.
Clark, Wm. B. (1970a) Gold districts of California: California Division Mines & Geology Bulletin 193: 31.
Localities in this Region
- California
- Sierra Co.
- Brandy City Mining District
- Sierra Co.
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