Lloyd Mine (Watson Brothers Placer Mine), Chili Hill, San Andreas Mining District, Calaveras County, California, USAi
| Regional Level Types | |
|---|---|
| Lloyd Mine (Watson Brothers Placer Mine) | Mine |
| Chili Hill | Hill |
| San Andreas Mining District | Mining District |
| Calaveras County | County |
| California | State |
| USA | Country |
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Latitude & Longitude (WGS84):
38° 13' 16'' North , 120° 43' 30'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| San Andreas | 2,783 (2011) | 4.8km |
| Mokelumne Hill | 646 (2011) | 9.0km |
| Valley Springs | 3,553 (2011) | 9.7km |
| Jackson | 4,649 (2017) | 14.8km |
| Rancho Calaveras | 4,489 (2018) | 15.6km |
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 |
|---|---|---|
| Amador County Gem & Mineral Society | Sutter Creek, California | 20km |
| Calaveras Gem & Mineral Society | Angels Camp, California | 23km |
A placer Au occurrence/drift mine located in secs. 2 & 11, T4N, R11E, MDM, 1.6 km (1.0 mile) SSE of Chili Hill (coordinates of record), about 4.6 km NW of San Andreas. Operated in 1873, the early 1900's, and during the period 1932 to 1939. MRDS database stated accuracy for this location is 100 meters.
Mineralization is a placer Au deposit located on an unspecified paleochannel. Most of the gravel is loose, although the roof, or top, gravel, is slightly cemented. The pay gravel is about 250 feet with an average depth of 6 feet. The channel gravels consist mainly of white schist, slate and flat quartz stones. Local rocks include Jurassic marine rocks, unit 1 (Western Sierra Nevada and Western Klamath Mountains).
Workings include underground openings comprised of a 300 foot shaft, drifting and breasting. Fourteen men were employed in 1936.
In 1934 12,000 tons of gravel yielded 802 ounces of Au and 124 ounces of Ag. The Au is 875 fine.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
| ⓘ Native Gold Formula: Au Description: Placer material in a paleochannel. Somewhat argentiferous. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
List of minerals for each chemical element
| Au | Gold | |
|---|---|---|
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS MRDS: | 10028667 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Calaveras-Baker 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 #0060090219
