Grau Mine

The Grau Mine is a chromium mine located in Tehama county, California at an elevation of 2,480 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: Grau Mine
Secondary: North Elder Creek Group

Commodity

Primary: Chromium
Tertiary: Iron

Location

State: California
County: Tehama
District: North Elder Crk

Land Status

Land ownership: National Forest
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

Type: Unknown

Workings

Not available

Ownership

Owner Name: John K. Withers
Percent: 100.0
Home Office: California
Info Year: 1985

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Underground
Mining Method: Unknown
Year First Production: 1942
Discovery Year: 1886
Years of Production:
Organization:
Significant: N

Physiography

General Physiographic Area: Pacific Mountain System
Physiographic Province: Pacific Border Province
Physiographic Section: California Coast Ranges

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Unknown: Antigorite
Unknown: Enstatite
Unknown: Magnesite
Unknown: Olivine
Unknown: Chromite

Comments

Comment (Deposit): 3/75 ORE BODY TYPE - DISSEMINATED,STRINGERS & MASSIVE; ORE & Y ROCK FORMING CONTEMPORANEOUSLY. MINE CAP CST-DEV.15M; EQIP INCL. IN 061030011; WORK CAP.125M DEV0; EXP0: CUSTOM MILL,NO CAPIT.COSTS INVOLVED: CR/FE RATIO ALTERATION TYPE-SERPENTINIZATION E=S102 01.77,CR2O3 52.62,FEO 11.29,TOTAL FE 14.79,AL203 12.6 5.75,CR/FE 3.13

Comment (Reserve-Resource): THE 39,000 MT. ARE MINED WITH THREE OTHER PROPERTIES IN THE AREA. THE COST AND MINING METHODS ARE UNDER SEQ. NO. 0061030010.

Comment (Reserve-Resource): IN DEPOSIT REPORT "CHROMITE DEPOSITS OF THE NORTHELDER CREEK AREA, TECHAMA COUNTY, CALIFORNIA."ALSO SEE SEQ# 0061030010.

References

Reference (Deposit): WFOC MIN PROP FILE.

Reference (Deposit): CALIF DIV MINES GEOL BULL 134 CH3 PP133-191 1965.

Reference (Deposit): USGS BULL 945-G PP190-210 1946.

Reference (Deposit): CALIF JOUR MINES GEOL V42 NO3 PP183-195 1946.

Reference (Deposit): CALIF STATE DIV MINES 39TH REPT STATE MINERAL CH1 PP90-92 19

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.