Sugarman claim mine, Browns Flat, Columbia Mining District, East Belt, Tuolumne County, California, USAi
| Regional Level Types | |
|---|---|
| Sugarman claim mine | Mine |
| Browns Flat | Flat |
| Columbia Mining District | Mining District |
| East Belt | - not defined - |
| Tuolumne County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 0' 28'' North , 120° 22' 10'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Sonora | 4,818 (2017) | 2.8km |
| East Sonora | 2,266 (2011) | 3.4km |
| Columbia | 2,297 (2017) | 4.2km |
| Phoenix Lake | 4,269 (2017) | 5.5km |
| Jamestown | 3,433 (2011) | 7.6km |
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 |
|---|---|---|
| Calaveras Gem & Mineral Society | Angels Camp, California | 16km |
A former Au-Ag mine located in the N½NW¼ sec. 30, T2N, R15E, MDM, 1.4 km (4,700 feet) ENE of Browns Flat, in the headwaters area of Tennessee Gulch on the lower western slope of Bald Mountain. Property consisted of 2 claims. C. F. Smith and C. R. Watson et al., of Sonora. owners. MRDS database accuracy for this location is not stated.
Mineralization is a quartz vein deposit hosted in quartzite, mica schist (Calaveras Formation) and slate. The ore body strikes N57E and dips 60NW. Granite dikes intersect quartz veins where pockets occur. The dike pinches and swells, 8 to 60 feet in thickness, dipping S. Ore was of gem quality (?). The ore shoots or pockets occur near east and west granite crossings, which reefs are from 8 to 60 feet wide and dip to the south. Rich pockets are formed at the point where these crossings come in contact with the vein in a belt of black slate, also with quartz stringer feeders having the same course as the vein, but dipping faster into the main vein near a crossing. The quartz is free milling, containing coarse gold associated with tellurides of gold and silver. Granite is an associated rock. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).
Workings include underground openings comprised of 4 drift adits. The lower adit is 1,800 feet and is situated 80 feet below the higher adit, which is 500 feet long. One shaft on each of the 2 claims.
Production data are found in: Logan, C.A. (1949).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ 'Mica Group' |
| ⓘ Native Gold Formula: Au Description: Occurs beautifully crystallized. References: |
| ⓘ Petzite Formula: Ag3AuTe2 References: |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Sylvanite Formula: AgAuTe4 References: |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Petzite | 2.BA.75 | Ag3AuTe2 |
| ⓘ | Sylvanite | 2.EA.05 | AgAuTe4 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Unclassified | |||
| ⓘ | 'Mica Group' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Ag | Silver | |
| Ag | ⓘ Petzite | Ag3AuTe2 |
| Ag | ⓘ Sylvanite | AgAuTe4 |
| Te | Tellurium | |
| Te | ⓘ Petzite | Ag3AuTe2 |
| Te | ⓘ Sylvanite | AgAuTe4 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Au | ⓘ Petzite | Ag3AuTe2 |
| Au | ⓘ Sylvanite | AgAuTe4 |
Other Databases
| Link to USGS MRDS: | 10077943 |
|---|
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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