Greenhorn

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

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.

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.