St. Johns Mine

The St. Johns Mine is a mercury mine located in Solano county, California at an elevation of 1,112 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: St. Johns Mine
Secondary: St. Johns Quicksilver Mine
Secondary: Vallejo
Secondary: St. John Mine.

Commodity

Primary: Mercury

Location

State: California
County: Solano
District: Sulfur Springs Mountain (Vallejo)

Land Status

Not available

Holdings

Not available

Workings

Type: Underground

Ownership

Owner Name: Mrs. C. Dennis
Years: 1939 -

Owner Name: J. C. Lawley
Years: 1939 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1873
Discovery Year: 1852
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: TABULAR

Structure

Type: R
Description: Prominent N-S Fracture System In The Sandstone

Type: L
Description: Thrust Fault

Alterations

Alteration Type: L
Alteration Text: Silica - Carbonate From Serpentine And Andesite

Rocks

Name: Serpentinite
Role: Host
Age Type: Host Rock
Age in Years: 170.500000+-7.500000
Age Young: Jurassic

Analytical Data

Analytical Data: ASSAYS 2-3 LB/TON OR LESS

Materials

Ore: Cinnabar
Gangue: Quartz

Comments

Comment (Geology): JUR(?) SEDIMENTS AND JUR(?) SERPENTINE IN BRECCIA BENEATH A THRUST FAULT. BOTH ROCKS INTRUDED BY ANDESITE DIKES. DUMPS OF OLD TUNNELS SHOW SCHISTS

Comment (Location): NORTHERN END OF SULFUR SPRINGS MOUNTAIN RIDGE

Comment (Production): 130-150 LB/FT OF WORKINGS

Comment (Development): LAST PRODUCTION - 1923

Comment (Workings): INACCESSIBLE (1965)

References

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

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

Reference (Production): USBM DATA

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

Reference (Deposit): AUBURY, L. E., 1903, THE QUICKSILVER RESOURCES OF CALIFORNIA: CDMG BULL. 27.

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.