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Malvina

Past Producer in Mariposa county in California, United States with commodities Gold, Silver, Lead, Copper
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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. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Mining district
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10076864
MRDS ID W024136
Record type Site
Current site name Malvina
Related records 10211960, 10212149

Geographic coordinates

Geographic coordinates: -120.20349, 37.69798 (WGS84)
Elevation 594
Relative position 1 MILE WEST OF COULTERVILLE

Site location context

Political divisions (FIPS codes)

Mariposa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Coulterville(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Merced(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Mariposa

Public Land Survey System information

Meridian Township Range Section Fraction State
003S 016E 04,09,10 California

Comments on the location information

  • UTM EST. ; INFO FROM LAND.ST :UNDETERMINED

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Lead Secondary
Copper Secondary

Materials information

Materials Type of material
Gold Ore
Ankerite Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone

Nearby scientific data

(1) -120.20349, 37.69798
ListMap

Economic information

Ore body information

  • Strike N 45 - 50 W
    Dip 56 - 75 NE
    Thickness 6.1M
    Depth to top 0M

Comments on the geologic information

  • GEOL.DESC: LOGAN ( 1935 ) MENTIONS A STRIP OF GREENSTONE ON THE HANGING WALL SIDE. THE VEIN HAS FORMED A FEW HUNDRED FEET FROM THE CONTACT BETWEEN MARIPOSA FM AND PYROXENE ANDESITE GREENSTONE OF THE PENON BLANCO MEMBER OF THE AMADOR GROUP. THE MARIPOSA SLATE OCCUPIES A SYNCLINAL TROUGH FAULTED OFF ON THE NORTHEAST BY THE MAIN BRANCH OF THE MOTHER LODE THRUST. WEST OF THE MALVINA VEIN & N OF THE PATSOI CLAIM ARE CONGLOMERATIC BEDS NEAR THE BASE OF THE MARIPOSA FM CONTAINING QUARTZ AND SLATE PEBBLES. MARIPOSA IS IN GRADATIONAL CONTACT WITH THE AMADOR GREENSTONES.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Medium
Significant No
Production years 1852 - 1882 , 1894 - 1897 , 1910 - 1920 , 1933 - 1934 , 1938 - 1942

Mining district

District name Coulterville

Comments on the production information

  • NO PRODUCTION SINCE 1942 . TOTAL PRODUCTION PROBABLY IN EXCESS OF $1,000,000 , TOTAL RECORDED PRODUCTION $867,000 .

Workings at the site

  • Type of workings Surface
    Length 2529.84M
    Overall depth 307.85M

Comments on the workings information

  • TWO SHAFTS. MAIN SHAFT HAS FIVE LEVELS. MOST ORE STOPED ABOVE 600 FT. LEVEL.

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. 122 - 126 , 280 .

  • Deposit

    CASTELLO, W. O., 1921 , MINES AND MINERAL RESOURCES OF MARIPOSA COUNTY IN SEVENTEENTH REPORT OF THE STATE GEOLOGIST: CALIFORNIA STATE MINING BUREAU, P. 123 .

  • Deposit

    LAIZURE, C. MCK., 1928 , SAN FRANCISCO FIELD DIVISION IN TWENTY-FOURTH REPORT OF THE STATE MINERALOGIST: CALIFORNIA STATE MINING BUREAU. P. 97 .

  • Deposit

    LOGAN, C. A., 1935 , THE MOTHER LODE BELT OF CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 108 , P. 183 - 184 .

  • Deposit

    5) 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. 10 FT. THICK

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-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.

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.