Big Spring claim (Big Spring Mine; Graham), Angels Camp, Angels Camp Mining District, Calaveras County, California, USAi
| Regional Level Types | |
|---|---|
| Big Spring claim (Big Spring Mine; Graham) | Claim |
| Angels Camp | City |
| Angels Camp Mining District | Mining District |
| Calaveras County | County |
| California | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
38° 3' 11'' North , 120° 31' 37'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Angels Camp | 2,677 (2012) | 2.0km |
| Vallecito | 442 (2011) | 6.2km |
| Tuttletown | 668 (2011) | 9.0km |
| Murphys | 2,213 (2015) | 11.0km |
| Columbia | 2,297 (2017) | 11.2km |
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 | 2km |
| Amador County Gem & Mineral Society | Sutter Creek, California | 45km |
A former Au mine located in the SE¼ (estimated) sec. 3, T2N, R13E, MDM, about 2.5 km (1¼ miles) SSE of Angels Camp, just N of Alabny Flat ( E OF HWY 49). Operated con tinuously during the period 19342 to 1941. MRDS database stated accuracy for this location is 100 meters. Property was prospected in 1920-1921 by Angels Camp Deep Co. Originally worked during the gold rush where rich surface ores were mined in the area.
Mineralization is a vein depoasit hosted in schist and amphibolite. The ore body strikes N20W and dips 50NE at a thickness of 30.48 meters. The veins are 10 to 100 feet thick. There are 2 veins on the property, both have similar strike and dip. The back vein has an average thickness of 5 feet. The second vein is the Mother Lode vein, 80 feet E at surface. The ore contains free gold, pyrite and considerable gouge. Local rocks include undivided pre-Cenozoic metavolcanic rocks, unit 2 (undivided).
Workings include surface and underground openings with an overall depth of 70.1 meters. Property was developed by a 100 foot shaft. Some surface ore was mined. Later developments included an inclined shaft.
Production data are found in: Logan (1934) & Clark (1962).
Ore in 1938 occasionally was valued as high as $60 (period values) per ton.
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 2 - Sulphides and Sulfosalts | |||
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Au | Gold | |
| Au | ⓘ Gold | Au |
Other Databases
| Link to USGS MRDS: | 10028958 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Shoofly-Olds Ferry DomainDomain
- Sierra Nevada BatholithVolcanic Arc
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
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
References
(n.d.) Minerals Availability System (MAS), U.S. Bureau of Mines.file ID #0060090669
