The Greenhorn is a copper mine located in Shasta county, California at an elevation of 2,749 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: 2,749 Feet (838 Meters)
Commodity: Copper
Lat, Long: 40.66417, -122.69500
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.
Greenhorn MRDS details
Site Name
Primary: Greenhorn
Secondary: Warren Bros.
Secondary: Willow Creek Mines Inc.
Commodity
Primary: Copper
Secondary: Silver
Secondary: Gold
Location
State: California
County: Shasta
District: West Shasta Copper - Zinc
Land Status
Not available
Holdings
Not available
Workings
Type: Underground
Ownership
Not available
Production
Year: 1930
Material type: CU AVG
Description: Ap_Grade: ^7-10% Cu, .1oz/Ton, Ag .8oz/Ton
Year: 1913
Material type: CU AVG
Description: Ap_Grade: ^Cu 10%
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Replacement
Operation Type: Unknown
Years of Production:
Organization:
Significant: Y
Deposit Size: S
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: Faults; Planar Shape Of Gouge And Uncrushed Crystals Of Pyrite, Along With Slickenslide Surfaces On Sulfide Bodies Suggest There Faults To Be Pre-Mineral In Age, It'S Further Suggest That They May Have Served As Feeder Channels For Mineralizing Solutions. Forming Eastern Limit Of No. 1 And No. 2 Levels Is A Through-Going Fault With Possible Post-Mineral Dip-Slip Displacement Of 50 Ft. East Side Downdropped.
Alterations
Alteration Type: L
Alteration Text: Pyritization
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Bornite
Ore: Pyrite
Ore: Chalcopyrite
Ore: Cuprite
Ore: Malachite
Ore: Chrysocolla
Ore: Copper
Ore: Chalcocite
Gangue: Quartz
Comments
Comment (Geology): GEOL.DESC: PRINCIPAL FORMATIONS IN AREA ARE BALAKALA RHYOLITE AND BRAGDON FORMATION, THEY ARE WITHIN OUTER PART OF SHASTA BALLY BATHOLITH AUREOLE. BALAKALA EXHIBITS A WEAK TO PROMINENT FOLIATION, BRAGDON IS NOW MOSTLY PHYLLITE. FEW DIKES AND SILLS NOT METAMORPHOSED, INTRUDE BOTH FORMATIONS, MAIN CONTACT BETWEEN BALAKALA AND BRAGDON FORMATION'S STRIKES N 60 W AND DIPS 30 - 50 DEG NE.
Comment (Commodity): ORE CONSISTS OF 90 % PYRITE
Comment (Deposit): PROMINENT GOSSAN ON SURFACE
Comment (Workings): DEPOSIT DEVELOPED BY WORKINGS AT 10 DIFFERENT LEVELS BETWEEN 1,833 - 2,269 FT. IN ELEVATION. 14,000 FT. OF DRIFTS, RAISES AND STOPES, ORE WAS MINED BY ROOM AND PILLAR STOPING WITH OCCASIONAL TIMBER SUPPORT.
References
Reference (Deposit): ALBERS, J. P., 1965 , ECONOMIC GEOLOGY OF THE FRENCH GULCH QUADRANGLE SHASTA AND TRINITY COUNTIES, CALIF., SPECIAL REPORT 85 , CALIF. DIV. MINES AND GEOLOGY, PG. 35 - 36 .
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. 35 - 37 .
Reference (Production): LYDON, P. A. AND O'BRIEN; PG. 36 , (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.
