Mother Lode Central Mines (Marble Springs Mine; Bullion Mine; Bullion and Marble Springs claim), Angels Camp, Angels Camp Mining District, Calaveras County, California, USAi
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Latitude & Longitude (WGS84):
38° 2' 48'' North , 120° 31' 46'' West
Latitude & Longitude (decimal):
Type:
Group of Mines
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Angels Camp | 2,677 (2012) | 2.6km |
| Vallecito | 442 (2011) | 6.9km |
| Tuttletown | 668 (2011) | 8.7km |
| Columbia | 2,297 (2017) | 11.3km |
| Murphys | 2,213 (2015) | 11.7km |
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 | 3km |
| Amador County Gem & Mineral Society | Sutter Creek, California | 45km |
A former Au-Ag-Pb-Cu mine located in the SE¼ NE sec. 3 & in the NE¼ sec. 10, T2N, R13E, MDM, about 3 km SSE of Angels Camp, on the southern margin of Albany Flat (just W of state highway 49). Operated during the period 1934 to 1939. MRDS database stated accuracy for this location is 100 meters. Originally the claims were worked separately, but they were organized (consolidated) in 1934 (both mines are on the map).
Mineralization is hosted in greenschist and slate. The ore body strikes W and dips 55N at a thickness of 7.62 meters. There are 2 veins on the property, the Marble Springs, which strikes NW and dips 55NE, and the Bullion vein to the SW, which strikes nearly W and dips 55N. The Marble Springs vein is up to 15 feet thick. The Bullion vein is 8 to 28 feet thick. The footwall is greenstone and the hanging wall is slate. Local rocks include undivided pre-Cenozoic metavolcanic rocks, unit 2 (undivided).
Workings include underground openings comprised of at least 3 shafts. The No. 1 is on the Marble Springs claim. It is a 200 foot inclined shaft with a level at 200 feet. The No. 2 shaft is 500 feet to the SE on the Sunken vein, and is a 600 foot inclined depth and 150 foot shaft on the Bullion vein. A drift connects 1 and 2 on the 200 foot level. The ore shoot on the Marble Springs vein is SE of the shaft with a pitch of 300 feet and a stope length of 130 feet.
Production data are found in: Clark, Wm. B. & P.A. Lydon (1962).
15 tons of ore were treated daily in 1936. The Bullion claim was worked over 30 years ago (as of date of MRDS data ?).
Analytical data results: The ore averaged $7.20 Au/ton (period values).
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: | 10102686 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Shoofly-Olds Ferry DomainDomain
- Sierra Nevada BatholithVolcanic Arc
USA
- California
- Mother Lode BeltBelt
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References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0060090896
