The Keystone is a copper mine located in Shasta county, California at an elevation of 2,999 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: 2,999 Feet (914 Meters)
Commodity: Copper
Lat, Long: 40.72111, -122.50389
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: Copper
Secondary: Silver
Secondary: Gold
Secondary: Zinc
Location
State: California
County: Shasta
District: West Shasta Copper - Zinc
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: M
Physiography
General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: Klamath Mountains
Mineral Deposit Model
Model Name: Massive sulfide, kuroko
Orebody
Form: TABULAR
Structure
Type: L
Description: Steep Faults Have Been Found To Terminate Some Of The Massive Sulfide Bodies, Suggesting Possible Feeder Channels For Ore Solutions.
Alterations
Not available
Rocks
Name: Rhyolite
Role: Host
Age Type: Host Rock
Age Young: Late Devonian
Name: Rhyolite
Role: Host
Age Type: Host Rock Unit
Age Young: Late Devonian
Analytical Data
Not available
Materials
Ore: Chalcopyrite
Comments
Comment (Production): 122,000 TONS MINED - ORE AVERGED 6 % CU, 8 % ZN, 2.7 OZ/TON AG, .06 OZ/TON AU, 30 % FE, 35 % S, AND 15 % INSOLUBLE MATERIAL.
Comment (Deposit): ORE WAS SUBDIVIDED ON BASIS OF COPPER CONTENT - BOTH TYPES ARE MASSIVE SULFIDE BODIES, ORE BODIES ARE LOCATED IN A PRODUCTIVE ZONE 300 FT. THICK, IMMEDIATELY BELOW BASE OF UPPER UNIT IN THE BALAKLALA RHYOLITE.
Comment (Geology): GEOL.DESC: ORE BODY IS OVERLAIN BY A GENTLY DIPPING CONTACT BETWEEN UPPER AND MIDDLE UNITS OF THE BALAKALA RHYOLITE, NEAR THE PORTAL IS THE UPPER PART OF THE MIDDLE UNIT, AS COURSE PHENOCRYST TUFF THAT CONTAINS A FEW BODIES OF MASSIVE COURSE PHENOCRYST RHYOLITE.
Comment (Deposit): PORTALS OF THE MAIN ADITS ARE CAVED
Comment (Workings): 2 ADITS, DRIFTS AND CROSSCUTS
Comment (Commodity): COPPER RICH ORE OCCURS IN SEPERATE, TABULAR BODIES AND AS PART OF LARGE PYRITIC MASSES.
References
Reference (Deposit): KINKEL, A. R., HALL, W. E. AND ALBERS, J. P., 1956 , GEOLOGY AND BASE - METAL DEPOSITS OF WEST SHASTA COPPER - ZINC DISTRICT SHASTA COUNTY, CALIF., GEOLOGICAL SURVEY PROFESSIONAL PAPER 285 , PG. 129 - 131 .
Reference (Deposit): LYDON, P. A. AND O'BRIEN, J. C., 1974 , MINES AND MINERAL RESOURCES OF SHASTA COUNTY CALIF.; COUNTY REPORT 6, CALIF. DIV. MINES AND GEOLOGY, PG. 107 .
Reference (Production): KINKEL ET AL., 1956 , PG. 129 (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.
