Douglas Flat

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

Name: Douglas Flat  

State:  California

County:  Calaveras

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.


Satelite image of the Douglas Flat

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

"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.