Oat Hill Mine

The Oat Hill Mine is a mercury mine located in Napa county, California at an elevation of 1,841 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: Oat Hill Mine
Secondary: Oat Hill
Secondary: Napa Consolidated

Commodity

Primary: Mercury

Location

State: California
County: Napa
District: East Mayacmas

Land Status

Not available

Holdings

Not available

Workings

Type: Underground

Ownership

Owner Name: Norman B. Livermore And Sons

Owner Name: Kritikos, William
Years: 1970 -

Production

Year: 1960
Time Period: To 1960
Material type: HG
Description: Cp_Grade: ^10-15 Lb/Ton

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1876
Discovery Year: 1872
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: Y
Deposit Size: M

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

Type: R
Description: Mayacmas Anticline Trending Nw

Type: L
Description: Local Fractures , Brecciation Of Sediments

Alterations

Alteration Type: L
Alteration Text: Kaolinization Of Sediments

Rocks

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

Name: Basalt
Role: Associated
Age Type: Associated Rock
Age Young: Holocene

Name: Basalt
Role: Associated
Age Type: Host Rock Unit
Age Young: Late Cretaceous

Analytical Data

Not available

Materials

Ore: Cinnabar
Gangue: Quartz
Gangue: Calcite
Gangue: Pyrite

Comments

Comment (Geology): FAR REMOVED FROM SERPENTINE, AN UNUSUAL OCCURRENCE. BASALT FLOW PRESENT.

Comment (Production): HIGH GRADE ORE EXHAUSTED AROUND 1903. USBM DATA.

Comment (Workings): 3RD LARGEST MERCURY MINE IN THE US. WORKINGS LARGELY INACCESSIBLE

Comment (General): Note the distinction between this record for Oat Hill Mine and the other record, 10261509 (MAS 00608550127), which is the plant record.

Comment (Exploration): 1943 DIREXPL WITH USBM - SIGNIFICANT TONNAGE OF LOW GRADE OR

References

Reference (Deposit): RANSOME, A.L. AND KELLOGG, J.L., 1939, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG, V. 35, P. 353-486

Reference (Deposit): YATES, R. G. AND HILPERT, L. S., 1949, QUICKSILVER DEPOSITS OF THE EASTERN MAYACMAS DISTRICT, LAKE AND NAPA COUNTIES, CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 42, no. 3, p. 231-286, pl. 29.
Pages: p. 260-265.

Reference (Deposit): BAILEY, E. H., USGS, PERSONAL FILES

Reference (Deposit): HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252

Reference (Deposit): JOHNSON, F.T. AND RICKER, S., 1949, INVESTIGATION OF THE OAT HILL MERCURY MINE, NAPA COUNTY, CALIF.: USBM RI 4542

Reference (Deposit): DAVIS, F.F., 1948, MINES AND MINERAL RESOURCES OF NAPA COUNTY, CALIF.: CJMG, V. 44, P. 176-183

Reference (Deposit): BRADLEY, W.W., 1918, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG BULL. 78, 389 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.