Santa Rosa

The Santa Rosa is a lead and copper mine located in Inyo county, California at an elevation of 6,749 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: Santa Rosa

Commodity

Primary: Lead
Primary: Copper
Secondary: Silver
Secondary: Zinc
Secondary: Gold

Location

State: California
County: Inyo

Land Status

Not available

Holdings

Not available

Workings

Not available

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: L

Physiography

Not available

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Type: L
Description: Fault; Inlier Of Calc - Hornfels Is Structurally A Horst, Santa Rosa Fault Bounds It On The East And Another Steep Fault Forms The Western Boundary. Santa Rosa Fault Strikes North, Dips 80 E, Its A Normal Fault, East Block Downdropped About 250 Ft. Most Important Faults Strike N 10 - 20 W, Dip 30 - 60 Sw.

Alterations

Not available

Rocks

Name: Diorite
Role: Associated
Age Type: Host Rock
Age Young: Late Permian

Analytical Data

Not available

Materials

Ore: Hemimorphite
Ore: Pyrite
Ore: Sphalerite
Ore: Galena
Ore: Chalcopyrite
Gangue: Calcite

Comments

Comment (Commodity): GRADE OF ORE IS ERRATIC, RICHEST ORE OCCURS IN SHOOTS IN THICKER PARTS, OF VEINS.

Comment (Location): UTM ACC. ; INFO FROM LAND.ST :UNDETERMINED

Comment (Production): 1910 - 1950 , 36,854 SHORT TONS OF ORE WAS MINED

Comment (Deposit): AT LEAST 12 VEINS EXPOSED FROM 100 FT TO 700 FT. IN LENGTH, 3 - 4 FT. THICK, MOST ABUNDANT ARE WEST DIPPING VEINS.

Comment (Workings): 352 FT. HESSON INCLINED SHAFT, SEVERAL SHALLOWER SHAFTS, ABOUT 1,500 FT. OF DRIFTS AND CROSSCUTS, EXTENSIVE STOPES. AN 1,800 FT. WESTERLY TRENDING CROSSCUT ADIT WAS DRIVEN IN 1953 .

Comment (Geology): GEOL.DESC: MINE IS WITHIN INLIER OF LOWER LIMESTONE MEMBER OF OWENS VALLEY FORMATION, HAS BEEN METAMORPHOSED. INLIER IS 2,000 FT. LONG AND 600 FT. WIDE. IT IS ENCIRCLED BY TERTIARY AND QUATERNARY VOLCANIC ROCKS CONSISTING OF OLIVINE BASALT, TUFF, TUFF - BRECCIA, AGGLOMERATE AND ANDESITE. CALC - HORNFEL CONSISTS MAINLY OF CALCITE, QUARTZ AND DIOPSIDE, MINOR ZOISITE, GARNET, EPIDOTE, LIMONITE AND OPAQUE MINERALS. MINOR BEDS OF UNSILICATED BLUISH - GRAY LIMESTONE, LOCALLY FOSSILIFEROUS ARE INTERBEDDED WITH CALC - HORNFELS. INLIER IS CUT BY SYENO - DIORITE PORPHYRY DIKES, 2 - 6 FT. THICK, STRIKE N 70 W, DIP NEAR VERTICAL. 2 - 16 FT. THICK BASALT DIKES, CUT BOTH LIMESTONE AND VOLCANIC ROCKS.

Comment (Deposit): SOME ZINC - RICH PRIMARY ORE WAS DISCOVERED AND BEING MINED IN 1955 .

References

Reference (Deposit): HALL, W. E. AND MACKEVETT, E. M., 1958 , ECONOMIC GEOLOGY OF THE DARWIN QUADRANGLE, INYO COUNTY, CALIFORNIA; DIV. OF MINES. SPECIAL REPORT 51 , P. 53 - 54

Reference (Production): HALL, W. E. AND MACKEVETT, 1958 , P. 53 (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.