The El Dorado is a copper mine located in El Dorado county, California.
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
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.
El Dorado MRDS details
Site Name
Primary: El Dorado
Secondary: Roosevelt
Commodity
Primary: Copper
Secondary: Gold
Secondary: Silver
Secondary: Zinc
Secondary: Nickel
Location
State: California
County: El Dorado
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Replacement
Operation Type: Unknown
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
Not available
Orebody
Form: LENTICULAR
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Analytical Data: 5 - 10% CU, 1.5% ZN, 1 OZ/TON AG, TRACES OF NICKEL AND GOLD.
Materials
Ore: Pyrite
Ore: Chalcopyrite
Comments
Comment (Production): DURING EARLY 1940'S SOME COPPER ORE WAS MINED, ORIGINALLY WORKED FOR GOLD IN 1860'S. 75 TONS OF ORE WAS STOCKPILED PRIOR TO 1945. SMALL PRODUCTION OF CU-ZN DURING 1951
Comment (Deposit): MASSIVE SULFIDE BANDS SEVERAL FEET IN THICKNESS HAVE EVIDENTLY REPLACED THE GREEN TUFFACEOUS ROCK.
Comment (Workings): TWO COMPARTMENT 100 FT. SHAFT INCLINED TO EAST. A NORTH-TRENDING 173 FT. ADIT, DRIVEN AS A CROSSCUT FOR 46 FT. AND AS A DRIFT FOR 127 FT., CONNECTS WITH THE SHAFT ON THE 50 FT. LEVEL, 128 FT. FROM ADIT PORTAL ON 100 FT. LEVEL THERE DRIFTS EXTENDING 35 FT, TO THE NORTH AND 10 FT. TO THE SOUTH.
Comment (Deposit): U.S. BUREAU OF MINES EXPLORED WITH 1,613 FT. OF DRILL HOLES.
Comment (Geology): GEOL.DESC: COUNTY ROCK IS MARIPOSA SLATE WITH SMALL AMOUNTS OF FINE-GRAINED GREEN TUFFACEOUS ROCK INTERBEDDED WITH SLATE.
References
Reference (Deposit): CLARK, W.B. AND CARLSON, D.W., 1956 , MINES AND MINERAL RESOURCES, EL DORADO COUNTY, CA: CALIF JOUR. MINES AND GEOLOGY VOL. 52 , NO. 4 : DIV. OF MINES, P. 395 - 396 .
Reference (Deposit): GOODWIN, J.G., 1957 ; LEAD AND ZINC IN CALIFORNIA: CALIF. JOUR. MINES AND GEOLOGY, VOL. 53 , NOS. 3 & 4 : DIV. OF MINES, P. 441 - 442
Reference (Production): GOODWIN, J.G., 1957 , P. 442
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.
