La Joya

The La Joya is a mercury mine located in Napa county, California at an elevation of 1,749 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

Name: La Joya  

State:  California

County:  Napa

Elevation: 1,749 Feet (533 Meters)

Commodity: Mercury

Lat, Long: 38.43944, -122.47111

Map: View on Google Maps

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.


Satelite image of the La Joya

La Joya MRDS details

Site Name

Primary: La Joya


Commodity

Primary: Mercury


Location

State: California
County: Napa
District: Oakville


Land Status

Not available


Holdings

Not available


Workings

Type: Underground


Ownership

Owner Name: James Doherty


Production

Year: 1962
Time Period: To 1962
Material type: HG
Description: Cp_Grade: ^5-12 Lb/Ton


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1865
Years of Production:
Organization:
Significant: N
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

Form: PODS


Structure

Not available


Alterations

Alteration Type: L
Alteration Text: Silica Carbonate Alteration Of Serpentine


Rocks

Name: Volcanic Rock (Aphanitic)
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene

Name: Volcanic Rock (Aphanitic)
Role: Associated
Age Type: Host Rock
Age Young: Late Jurassic


Analytical Data

Not available


Materials

Ore: Cinnabar
Ore: Mercury
Gangue: Quartz
Gangue: Pyrite
Gangue: Chalcedony


Comments

Comment (Reserve-Resource): NO VISIBLE RESERVES

Comment (Workings): WORKINGS LARGELY INACCESSIBLE


References

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

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

Reference (Deposit): 5) BRADLEY, W.W., 1918, QUICKSILVER RESOURCES OF CALIFORNIA: CJMG BULL. 78, 389 P.

Reference (Production): USBM DATA

Reference (Deposit): FIX, P. F. AND SWINNEY, C. M., 1949, QUICKSILVER DEPOSITS OF THE OAKVILLE DISTRICT, NAPA COUNTY, CALIFORNIA: CALIF. JOUR. OF MINES AND GEOLOGY, V. 45, P. 31 - 46

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


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