Moore Mine

The Moore Mine is a chromium mine located in Napa county, California at an elevation of 1,601 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: Moore Mine
Secondary: Marshall and Vanderbilt Claims

Commodity

Primary: Chromium
Tertiary: Rhodium
Tertiary: Ruthenium
Tertiary: Palladium
Tertiary: Platinum
Tertiary: Iridium

Location

State: California
County: Napa

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

Type: Surface/Underground

Ownership

Owner Name: John Moore
Years: 1946 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

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

Mineral Deposit Model

Model Name: Podiform chromite (minor)

Orebody

Form: LENSES

Structure

Type: L
Description: Vertical Shear Striking Northeast Can Be Traced For 1,500 Ft

Alterations

Not available

Rocks

Name: Peridotite
Role: Associated
Age Type: Host Rock
Age Young: Late Jurassic

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

Name: Peridotite
Role: Associated
Age Type: Associated Rock
Age Young: Late Jurassic

Analytical Data

Analytical Data: RH=38 PPB.
Analytical Data: RU=1,670 PPB
Analytical Data: IR=450 PPB
Analytical Data: PD=128 PPB
Analytical Data: 1 PGE ANALYSIS: PT=141 PPB

Materials

Ore: Chromite
Gangue: Olivine

Comments

Comment (Production): LARGEST DEPOSITS WERE ON THE MARSHALL AND VANDERBILT CLAIMS. SHIPMENTS WERE ABOUT EQUAL FOR BOTH CLAIMS

Comment (Workings): OPEN CUTS, PITS, AND TRENCHES. LARGEST OPEN CUT IS 50 FT LONG AND 25 FT DEEP. ADITS SHOWN ON TOPOGRAPHIC MAP

Comment (Location): UTM GIVEN IS FOR PGE SAMPLE COLLECTION SITE. LAT/LONG GIVEN ARE FOR NORTHERN ADIT SYMBOL IN SE/4 SEC. 18. UTM FOR THIS IS 4294320N, 557060E.

Comment (Deposit): THERE ARE 5 PARALLEL LENSES UP TO 30 FT LONG AND 3 FT WIDE SCATTERED OVER A 50 FT WIDTH IN A SHEAR ZONE ON THE MARSHALL CLAIM

References

Reference (Deposit): DOW, D.H., AND THAYER, T.P., 1946, GEOLOGICAL INVESTIGATIONS OF CHROMITE IN CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 134, PT. 2, CH. 1, P. 21-22.

Reference (Deposit): CARLSON, C.A., AND OTHERS, 1985, ANALYSES FOR PLATINUM-GROUP ELEMENTS IN SAMPLES FROM PODIFORM CHROMITE DEPOSITS, CALIFORNIA AND OREGON: U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 85-442, 14 P.

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.