The Douglas Flat is a gold mine located in Calaveras county, California at an elevation of 2,149 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 2,149 Feet (655 Meters)
Commodity: Gold
Lat, Long: 38.12194, -120.45611
Map: View on Google Maps
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Douglas Flat MRDS details
Site Name
Primary: Douglas Flat
Commodity
Primary: Gold
Secondary: Platinum
Location
State: California
County: Calaveras
District: Vallecito District
Land Status
Not available
Holdings
Not available
Workings
Type: Surface/Underground
Ownership
Owner Name: Vallecito Western Mining Co.
Years: 1923 -
Owner Name: T. B. Bishop Co.
Years: 1962 -
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Deposit Type: Stream Placer
Operation Type: Unknown
Discovery Year: 1848
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada
Mineral Deposit Model
Model Name: Placer Au-PGE
Orebody
Form: STREAM SEDIMENT DEPOSITS
Structure
Not available
Alterations
Not available
Rocks
Name: Gravel
Role: Host
Age Type: Host Rock Unit
Age Young: Eocene
Analytical Data
Analytical Data: CONCENTRATE YIELDED $807.78/TON AU (0.032 OZ/TON, 1.1 PPM), $10.50/TON PT (0.00029 OZ/TON, 10 PPB), CONCENTRATED FROM 60 TONS TO 100 LB
Materials
Ore: Hematite
Ore: Gold
Ore: Magnetite
Comments
Comment (Location): EXACT LOCATION IS UNCERTAIN. LOCATION GIVEN IS FOR ADIT ON SOUTH DITCH SHOWN ON TOPO MAP
Comment (Production): GRADES ARE CALCULATED FROM ANALYTICAL DATA GIVEN IN DAY AND RICHARDS
Comment (Deposit): GRAVELS ARE RICHEST NEAR BEDROCK
Comment (Workings): HYDRAULIC 1850'S-1880'S, DRIFT MINING 1880'S, 1930'S, DRAGLINE 1930'S
Comment (Geology): BEDROCK OF LIMESTONE, SCHIST, SLATE, AMPHIBOLITE. GRAVELS ARE OVERLAIN IN PLACES BY RHYOLITE AND ANDESITE.
References
Reference (Deposit): DAY, D.T., AND RICHARDS, R.H., 1906, USEFUL MINERALS IN THE BLACK SANDS OF THE PACIFIC SLOPE: U.S. GEOLOGICAL SURVEY MINERAL RESOURCES OF THE UNITED STATES, CALENDAR YEAR 1905, P. 1182-1183.
Reference (Deposit): CLARK, W.B., 1970, GOLD DISTRICTS OF CALIFORNIA: CALIFORNIA DIVISION OF MINES AND GEOLOGY BULLETIN 193, P. 126.
Reference (Deposit): CLARK, W.B., AND LYDON, P.A., 1962, MINES AND MINERAL RESOURCES OF CALAVERAS COUNTY, CALIFORNIA: CALIFORNIA DIVISION OF MINES AND GEOLOGY COUNTY REPORT 2, P. 208.
California Gold
"Where to Find Gold in California" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in California. Read more: Where to Find Gold in California.
