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Thomas Brothers group (Thomas Bros. claims; Rose Marie; Al; Ho; Wheelock; Lucky Boy; Coarse Gold; Yellow Bird; Tip Top; Mt. Bullion; Golden Poppy; Cave City), Cave City, Mountain Ranch Mining District, Calaveras County, California, USAi
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Latitude & Longitude (WGS84):
38° 11' 49'' North , 120° 30' 34'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Mountain Ranch | 1,628 (2011) | 4.4km |
| Murphys | 2,213 (2015) | 7.8km |
| Forest Meadows | 1,249 (2015) | 9.5km |
| Fort Jones | 643 (2006) | 10.3km |
| Avery | 646 (2011) | 12.2km |
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 | 15km |
| Amador County Gem & Mineral Society | Sutter Creek, California | 34km |
A former lode Au occurrence/mine located in the center S½ sec. 14 & in sec. 23, T4N, R13E, MDM, 0.6 km (0.4 mile) S of Cave City, on the divide between O'Neil Creek and McKinney Creek (5 miles NW of Murphys). MRDS database stated accuracy for this location is 1,000 meters.
Mineralization is a vein deposit hosted in mica schist. The ore body strikes N & E and dips S at a thickness of 4.57 meters. The veins are thin. The quartz ledge is 3 to 15 feet thick with some high-grade pockets. Limestone occurs to the NE. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).
Workings include underground openings comprised of a 100 foot crosscut driven NW on the vein with a 100 foot drift to the E.
Mineralization is a vein deposit hosted in mica schist. The ore body strikes N & E and dips S at a thickness of 4.57 meters. The veins are thin. The quartz ledge is 3 to 15 feet thick with some high-grade pockets. Limestone occurs to the NE. Local rocks include Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).
Workings include underground openings comprised of a 100 foot crosscut driven NW on the vein with a 100 foot drift to the E.
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: | 10029173 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Shoofly-Olds Ferry DomainDomain
- Sierra Nevada BatholithVolcanic Arc
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References
Clark, Lorin D. (1954) Geology and mineral deposits of the Calaveritas quadrangle, Calaveras County, California. Special Report 40. California Division of Mines p.20
