The Pocohontas is a copper mine located in Mariposa county, California at an elevation of 2,001 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: 2,001 Feet (610 Meters)
Commodity: Copper
Lat, Long: 37.34417, -120.06333
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.
Pocohontas MRDS details
Site Name
Primary: Pocohontas
Commodity
Primary: Copper
Secondary: Gold
Secondary: Silver
Location
State: California
County: Mariposa
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Owner Name: Eben N. Briggs (Estate)
Home Office: C/O L. M. Olds
Production
Year: 1916
Material type: ORE
Description: Ap_Grade: ^Avg. 2.8% Cu
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1862
Years of Production:
Organization:
Significant: N
Deposit Size: M
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Trough
Mineral Deposit Model
Not available
Orebody
Form: LENTICULAR
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Hydrothermal
Rocks
Not available
Analytical Data
Analytical Data: 6 - 12 % CU, $2.50/TON AU ( 1902 PRICE
Materials
Ore: Pyrite
Ore: Sphalerite
Ore: Pyrrhotite
Ore: Chalcopyrite
Gangue: Quartz
Comments
Comment (Deposit): SULFIDE ORE OCCURS IN A GANGUE OF BRECCIATED WALL ROCK AND INTRODUCED QUARTZ. ONE SHOOT
Comment (Reserve-Resource): ESTIMATION NOT POSSIBLE DUE TO CONDITIONS OF MINE WORKINGS. NUMEROUS GOSSAN OUTCROPPINGS, AND SHEAR ZONES PARALLEL TO PRINCIPAL ORE ZONE HAVE NOT BEEN THOROUGHLY PROSPECTED. NO INDICATIONS OF LOWERING IN THE GRADE OF ORE WITH DEPTH.
Comment (Production): $30,000 CU IN A THREE - YEAR PERIOD IN EARLY 1900'S.
Comment (Geology): GEOL.DESC: WALL ROCKS CONSIST PRINCIPALLY OF QUARTZ - BIOTITE HORNFELS, QUARTZ - BIOTITE AND QUARTZ - BIOTITE - ANDALUSITE SCHIST. ALONG MINERALIZED ZONE, A SHEET OF HORNBLENDE RICH GRANITIC ROCK INTRUDED PARALLEL TO SCHISTOSITY. THIN SHEETS OF BIOTITE QUARTZ DIORITE PENETRATE SCHIST NEAR MINE OPENINGS. A STOCK OF BIOTITE QUARTZ DIORITE CROPS OUT LESS 400 FT. SE. OF MAIN SHAFT.
Comment (Workings): WORKINGS AS OF 1954 : 7 SHAFTS FROM 15 - 75 FT. DEEP AND TUNNEL DRIVEN NW. MOST SHAFTS INCLINED STEEPLY SE.
Comment (Deposit): Discovery Year: EARLY 1860'S
References
Reference (Deposit): BOWEN, O. E. AND CLIFFTON, G. H., 1957 , MINES AND MINERAL RESOURCES OF MARIPOSA COUNTY, CALIFORNIA, CALIF. JOUR. MINES AND GEOLOGY, VOL. 53 , NO. 1 & 2 , P. 67 - 69 , P. 230 .
Reference (Deposit): ERIC, J. H., 1948 , COPPER IN CALIFORNIA BULL. 144 ; DIV. OF MINES, P. 269 .
Reference (Production): BOWEN, AND CLIFFTON, 1957 , P. 68 (SEE REF.)
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.
