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St. Johns Mine

Past Producer in Solano county in California, United States with commodity Mercury
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Ownership information
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. Reporter information

Geologic information

Identification information

Deposit ID 10040639
MRDS ID M055491
Record type Site
Current site name St. Johns Mine
Alternate or previous names St. Johns Quicksilver Mine, Vallejo, St. John Mine.
Related records 10165890

Geographic coordinates

Geographic coordinates: -122.19272, 38.15184 (WGS84)
Elevation 339
Relative position 6 MI NE OF VALLEJO.

Site location context

Political divisions (FIPS codes)

Solano(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cordelia(quadrangle 1:24,000 scale)

Napa(quadrangle 1:100,000 scale)

Santa Rosa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Pablo Bay(hydrologic unit)

San Francisco Bay(hydrologic accounting unit)

San Francisco Bay(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Solano

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 004N 003W 33 California

Comments on the location information

  • NORTHERN END OF SULFUR SPRINGS MOUNTAIN RIDGE

Commodities

Commodity Importance
Mercury Primary

Materials information

Materials Type of material
Cinnabar Ore
Quartz Gangue

Alteration

  • (Local) Silica - Carbonate From Serpentine And Andesite

Analytical data

Result ASSAYS 2-3 LB/TON OR LESS

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite
    Stratigraphic age (youngest) Jurassic
    Chronological age 170.5
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Sandstone
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Economic information

Geologic structures

Type of structure Regional
Structure description Prominent N-S Fracture System In The Sandstone
Type of structure Local
Structure description Thrust Fault

Ore body information

  • General form TABULAR

Controls for ore emplacement

  • Breccia Zone

Comments on the geologic information

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

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Medium
Significant No
Discovery year 1852
Discoverer John Neate
Year of first production 1873
Production years 1873-1880, 1902-1908, 1914-1920, 1923, 1930, 1935-1940, 1942

Mining district

District name Sulfur Springs Mountain (Vallejo)

Ownership information

  • Type Operator
    Owner J. C. Lawley
    First year 1939
  • Type Owner
    Owner Mrs. C. Dennis
    First year 1939

Comments on the production information

  • 130-150 LB/FT OF WORKINGS

Workings at the site

  • Type of workings Underground
    Length 2590.8M
    Overall depth 198.12M

Comments on the workings information

  • INACCESSIBLE (1965)

Comments on development

  • LAST PRODUCTION - 1923

Reference information

Bibliographic references

  • Deposit

    BAILEY, E. H., USGS, PERSONAL FILES

  • Deposit

    HOLMES, G. W., JR., 1965, MERCURY IN CALIFORNIA: IN USBM IC 8252.

  • Deposit

    BRADLEY, W. W., 1918, QUICKSILVER RESOURCES OF CALIFORNIA: CDMG BULL. 78.

  • Deposit

    AUBURY, L. E., 1903, THE QUICKSILVER RESOURCES OF CALIFORNIA: CDMG BULL. 27.

  • Production

    USBM DATA

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1976 Gassaway, J. S. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

Maps centered on this site

Authoritative California resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.