Big Four Mine, Fourth Crossing, San Andreas Mining District, Calaveras County, California, USAi
Regional Level Types | |
---|---|
Big Four Mine | Mine |
Fourth Crossing | - not defined - |
San Andreas Mining District | Mining District |
Calaveras County | County |
California | State |
USA | Country |
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Latitude & Longitude (WGS84):
38° 7' 25'' North , 120° 37' 29'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
San Andreas | 2,783 (2011) | 9.4km |
Angels Camp | 2,677 (2012) | 9.7km |
Vallecito | 442 (2011) | 13.7km |
Mountain Ranch | 1,628 (2011) | 13.8km |
Murphys | 2,213 (2015) | 14.4km |
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 | 10km |
Amador County Gem & Mineral Society | Sutter Creek, California | 34km |
Mindat Locality ID:
74885
Long-form identifier:
mindat:1:2:74885:7
GUID (UUID V4):
e25ca449-428a-474e-9b75-81f005ac13d2
A former lode Au mine located in the SW¼NW¼ (estimated) sec. 11, T3N, R12E, MDM, 1.2 km (0.8 mile) SE of Fourth Crossing (¼ mile SSW of Simmons Point, just E of highway 49). MRDS database stated accuracy for this location is 100 meters.
Mineralization is a vein deposit hosted in slate and phyllite. The ore body strikes NW and dips NE at a thickness of 5.49 meters. There are 3 veins with slate hanging walls and footwalls. Local rocks include undivided pre-Cenozoic metavolcanic rocks, unit 2 (undivided).
Workings include surface and underground openings with an overall depth of 14.63 meters and an overall length of 21.34 meters, and comprised of an open cut and 136 foot shaft, now caved.
No production record found. Ore is free-milling.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsGallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
ⓘ | 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 | ⓘ Gold | Au |
Other Databases
Link to USGS MRDS: | 10028770 |
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Other Regions, Features and Areas containing this locality
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0060090339
Clark, Lorin D. (1954) Geology and mineral deposits of the Calaveritas quadrangle, Calaveras County, California. Special Report 40. California Division of Mines p.20