The Keystone is a gold mine located in San Bernardino county, California at an elevation of 3,848 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: 3,848 Feet (1,173 Meters)
Commodity: Gold
Lat, Long: 34.69194, -117.11694
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.
Keystone MRDS details
Site Name
Primary: Keystone
Commodity
Primary: Gold
Secondary: Silver
Tertiary: Tungsten
Location
State: California
County: San Bernardino
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Year: 1947
Material type: ORE
Description: Ap_Grade: ^2.4 Oz. Au/Ton
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Sonoran Desert
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Analytical Data: ASSAYS AS HIGH AS $800/TON REPORTED, BUT MOST ORE SAID TO RUN ABOUT $50/TON
Materials
Ore: Gold
Comments
Comment (Deposit): 2 CLAIMS. LAST OPERATED IN 1947 ; INFO.SRC : 1 PUB LIT
Comment (Location): UTM ACC E 1/2 NE 1/4 SE 1/4 SE 1/4 18
Comment (Production): NO OTHER PRODUCTION RECORD FOUND
Comment (Deposit): PARALLEL AND INTERSECTING VUGGY VEINS, 3-12 IN THICK
Comment (Workings): 9 ADITS, NUMEROUS TRENCHES AND PITS
Comment (Geology): SLICKENSIDES AND SEVERAL THIN GANGUE ZONES PARALLEL THE VEINS
References
Reference (Deposit): SOUTHERN PACIFIC COMPANY, 1964, MINERALS FOR INDUSTRY, SOUTHERN CALIFORNIA, V. 3, P. 48
Reference (Deposit): WRIGHT, L.A., AND OTHERS, 1953, MINES AND MINERAL DEPOSITS OF SAN BERNARDINO COUNTY, CALIF., CALIF. JOUR. MINES & GEOLOGY, V. 49, NOS. 1 & 2, P. 75
Reference (Production): SOUTHERN PACIFIC CO. (1964)
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.
