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Mount Gaines

Past Producer in Mariposa county in California, United States with commodities Gold, Silver, Copper, Lead, Zinc
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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. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Workings at the site
  17. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10030923
MRDS ID M009415
Record type Site
Current site name Mount Gaines
Alternate or previous names Barfield, Frenchman, Bearfield
Related records 10284971

Geographic coordinates

Geographic coordinates: -120.17321, 37.54132 (WGS84)
Elevation 465
Relative position 4.5 MI NE OF HORNITOS

Site location context

Political divisions (FIPS codes)

Mariposa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Hornitos(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Fresno River(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CA)

Bureau of Land Management CA BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States California Mariposa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 004S 016E 35,36 California

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Copper Secondary
Lead Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Argentite Ore
Barite Ore
Chalcopyrite Ore
Galena Ore
Gold Ore
Pyrite Ore
Quartz Gangue

Alteration

  • (Local) Shearing & Hydrothermal Alteration Along Vein Caused Development Of Schistose, Chloritic, Slate-Like Material Esp On Footwall Side Of Vein

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Metamorphic Rock > Hornfels
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Penon Blanco Member (Amador Group)
    Rock description Penon Blanco Member (Amador Group)

Nearby scientific data

(1) -120.17321, 37.54132
ListMap

Economic information

Ore body information

  • General form SINNOUS
    Strike N 35 E
    Dip 20 SE
    Thickness 4.57M
    Length 2743.2M
    Depth to top 0M

Controls for ore emplacement

  • Best Ore Concentrated On East Side Of Arcuate Irregularities

Comments on the geologic information

  • ORE DEPOSITION-PYRITE PRECEEDED GALENA, SPHALERITE & GOLD DEPOSITED AFTER PYRITE. PENON BLANCO MEMBER AMADOR GROUP.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1853

Mining district

District name Hornitos

Ownership information

  • Type Operator
    Owner J. W. Radil

Workings at the site

  • Type of workings Underground
    Length 4426.31M
    Overall depth 402.95M

Comments on the workings information

  • MAIN INCLINE OF 1322 FT, 13 DRIFT LEVELS, 11,000 FT. DRIFTS, 1200 FT RAISES, TUNNEL

Reference information

Bibliographic references

  • Deposit

    BOWEN, O.E., JR., GRAY, C.H., JR., 1957 , MINES AND MINERAL DEPOSITS OF MARIPOSA COUNTY, CALIFORNIA: CALIF. JOUR. MINES AND GEOLOGY, V. 53 , NOS. 1 AND 2 , P. 134 - 139 288

  • Deposit

    CASTELLO, W.O., 1921 , MINES AND MINERAL RESOURCES OF MARIPOSA COUNTY IN SEVENTEENTH REPORT OF THE STATE GEOLOGIST: CALIFORNIA STATE MINING BUREAU, P

  • Deposit

    LAIZURE, C. MCK., 1928 , SAN FRANCISCO FIELD DIVISION IN TWENTY-FOURTH REPORT OF THE STATE MINERALOGIST: CALIFORNIA STATE MINING BUREAU, P. 103 - 104

  • Deposit

    AUBURY, L.E., 1904 , REGISTER OF MINES AND MINERALS, MARIPOSA COUNTY CALIFORNIA: CALIFORNIA STATE MINING BUREAU, P. 12

  • Production

    BOWEN & GRAY, 1957

General comments

Subject category Comment text
Deposit VEIN, AVG 5 FT THICK
Deposit RADIL OWNED OVER 300 ACRES OF PATENTED MINING AND AGRICULTURAL LAND. FIRST MINING DONE IN VICINITY WAS PLACERING; LODE MINING BEGAN ABOUT 1868. ; INFO.SRC : 1 PUB LIT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1979 Bowman, J. And Albers, J. U.S. Geological Survey

Beyond USGS

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

Current status (per MSHA)

StatusActive since 10/25/2015
MSHA mine ID0404794
Mine name (MSHA)MT. GAINES MINE
Current operatorMt Gaines Rock
Current controller (parent)Jack Bankhead
Mine typeSurface (Metal / non-metal)

Inferred by coordinate + name similarity (925 m, 0.86 match). Confirm against MSHA if precision matters — non-USGS-curated cross-references may occasionally point at a neighbouring mine.

Open MSHA's Mine Data Retrieval System for inspections, accidents, and violations for this mine.

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.