Oro Grande

The Oro Grande is a copper mine located in Nevada county, California at an elevation of 7,349 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: Oro Grande  

State:  California

County:  Nevada

Elevation: 7,349 Feet (2,240 Meters)

Primary Mineral: Copper

Lat, Long: 39.40306, -120.50778

Map: View on Google Maps


Satelite image of the Oro Grande

Oro Grande MRDS details

Site Name

Primary: Oro Grande


Commodity

Primary: Copper
Secondary: Silver
Secondary: Gold


Location

State: California
County: Nevada
District: Meadow Lake


Land Status

Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land or if it is in an area that is generally private property. It does not indicate a claim status and does not necessarily indicate an area is open to prospecting.


Holdings

Not available


Workings

Not available


Ownership

Owner Name: J. P. Clark And F. J. Cook
Years: 1908 -


Production

Not available


Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
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

Not available


Structure

Not available


Alterations

Not available


Rocks

Not available


Analytical Data

Not available


Materials

Ore: Pyrite
Ore: Chalcopyrite
Ore: Bornite
Ore: Malachite
Gangue: Quartz


Comments

Comment (Deposit): WAS A FREE MILLING QUARTZ MINE UNTIL SULFIDE ZONE WAS REACHED COMPRISED OF 80 ACRES.

Comment (Deposit): GOSSAN IS IRON - STAINED PORPHYRY, THERE ARE 20 PARALLEL VEINS EXPOSED IN PLACES - CROPPINGS FOR 4500 FT., OXIDES FROM 1 - 10 FT. IN DEPTH.

Comment (Workings): VERTICAL SHAFT 32 FT., 3-COMPARTMENT VERTICAL SHAFT 125 FT., 2-COMPARTMENT SHAFT, VERTICAL 105 FT.,200 FT. OF OPEN CUTS; 30-FT. ADIT ON VEIN.

Comment (Production): PRODUCTION OF COPPER LESS THAN 100,000 POUNDS. VALUES REPORTED, COPPER 5 PER CENT, GOLD $7, SILVER 3 OZ. WAS WORKED 45 YEARS PRIOR TO 1908.


References

Reference (Deposit): AUBURY, L. E., 1908 , COPPER RESOURCES OF CALIFORNIA BULL 50 ; CALIF. MIN. BUR., P. 199

Reference (Deposit): MACBOYLE, E. 1918 , MINES AND MINERAL RESOURCES OF NEVADA COUNTY; 16TH REPT. STATE MIN.; CALIF. MIN. BUR., P 88