Casa Madera Mine (Casa Madera Gold Mine Syndicate), Thompson Peak, Soulsbyville & Confidence Mining District, East Belt, Tuolumne County, California, USAi
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Latitude & Longitude (WGS84):
38° 1' 15'' North , 120° 3' 27'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Long Barn | 155 (2011) | 10.5km |
| Sierra Village | 456 (2011) | 11.6km |
| Mi-Wuk Village | 941 (2011) | 12.2km |
| Twain Harte | 2,226 (2011) | 15.5km |
| Cold Springs | 181 (2011) | 15.7km |
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 | 43km |
A former lode Au-Pb clainms/mine located in sec. 13, T2N, R16E, MDM (coordinates approximate), 2.6 km (8,600 feet) NNE of Thompson Peak (coordinates of record), along Twomile Creek near its confluence with the Clavey River, and about 5 miles ENE of Soulsbyville, on private land within a National Forest area. MRDS database stated accuracy for this location is 100 meters.
Mineralization is a vein deposit hosted in slate-schist-quartzite rocks. These claims are near the contact of gabbroic intrusive rock with slaty quartzite and micaceous schists. An intrusive body is exposed just N of the workings on the mountain side, showing a sheeted zone, the plane of which strikes NW and dips 45W. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges) and/or Paleozoic marine rocks, undivided, unit 4 (Western Sierra Nevada).
Workings include underground openings comprised of 2 adits. The upper adit is 300 fet on seam without quartz or gouge. Just inside the portal crosscut of S-striking joint system, following bunches of sulfide. (grammar of MRDS databse file)
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
3 valid minerals.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Galena | 2.CD.10 | PbS |
| 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 |
| S | Sulfur | |
| S | ⓘ Galena | PbS |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS MRDS: | 10077979 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Mojave DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- Sierra NevadaMountain Range
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0061090729
