Mccormick Mine

The Mccormick Mine is a chromium mine located in Tuolumne county, California at an elevation of 1,014 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: Mccormick Mine
Secondary: Terry and Sell Lease Wwi

Commodity

Primary: Chromium

Location

State: California
County: Tuolumne
District: Chinese Camp Area

Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

Holdings

Not available

Workings

Not available

Ownership

Owner Name: Martin, Joseph W.
Home Office: Route 6, Box 116, Sonora, Ca 95370

Owner Name: Hemming, A. E. And A. M. (North Deposit)

Owner Name: Williamson, W. R. (South Deposit)

Production

Year: 1944
Time Period: 1942-1944
Material type: ORE
Description: Cp_Grade: ^43-49% Cr2o3, North And South Deposits

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1875
Year Last Production: 1957
Discovery Year: 1875
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Sierra Nevada

Mineral Deposit Model

Not available

Orebody

Form: LENSE

Structure

Type: R
Description: Nw Trending Bear Mountain Fault

Alterations

Not available

Rocks

Name: Diabase
Role: Associated
Age Type: Host Rock
Age Young: Late Cretaceous

Name: Diabase
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Permian

Name: Diabase
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Jurassic

Name: Diabase
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous

Analytical Data

Analytical Data: ORE AVERAGED 43-49% CR2O3 AND CR TO FE RATIO 2.8-3.5 TO 1.

Materials

Ore: Chromite

Comments

Comment (Location): 1:24000 QUADRANGLE MAP IS A 1962 EDITION

Comment (Reserve-Resource): STINSON, 1975, CDMG MINERAL PROPERTY REPORT, UNPUBLISHED

Comment (Production): THE 1950'S PRODUCTION PROBABLY CAME FROM REWORKING OF THE MINE DUMPS.

Comment (Deposit): THE DEPOSIT CONSISTED OF TWO MAIN ORE BODIES, NORTH AND SOUTH. BOTH HAD ABOUT THE SAME STRIKE AND DIP. THE SOUTHERN BODY WAS ORIGINALLY 165 FT LONG, HAD AN AVERAGE WIDTH OF 4 FT AND WAS HIGHLY FAULTED. THE NORTHERN BODY WAS MINED TO A DEPTH OF 100 FT AND HAD AN AVERAGE WIDTH OF 3-6 FT.

Comment (Deposit): Discovery Year: 1870'S

Comment (Geology): THE DEPOSIT OCCURS IN THE NORTHERN PART OF THE WESTERNMOST OF TWO SERPENTINE BELTS THAT TREND NW-SE ACROSS THE COUNTY. THE BELT IS EXPOSED OVER AN AREA 30KM BY 6KM.

Comment (Workings): WORKINGS OF THE SOUTHERN DEPOSIT CONSISTED OF 3 SHAFTS, 34-220 FT DEEP, AND OVER 700 FT OF DRIFTS, CROSSCUTS, RAISES AND WINZES. WORKINGS OF THE NORTHERN DEPOSIT CONSISTED OF SHAFTS AND DRIFTS, NOW CAVED (1944).

References

Reference (Deposit): STINSON, M.C., 1975, CDMG MINERAL PROPERTY REPORT, UNPUBLISHED.

Reference (Deposit): CATER, F.W. JR., 1948, CDMG BULL 134, PART 3, CHAPT. 1, P. 21-23.

Reference (Production): STINSON, 1975, CDMG MINERAL PROPERTY REPORT, UNPUBLISHED.

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.