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Mary Harrison Group

Past Producer in Mariposa county in California, United States with commodity Gold
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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. General comments
  21. Reporter information

Geologic information

Identification information

Deposit ID 10030851
MRDS ID M009309
Record type Site
Current site name Mary Harrison Group

Geographic coordinates

Geographic coordinates: -120.19793, 37.6952 (WGS84)
Elevation 610
Relative position 1 MI. S. OF COULTERVILLE ON HIGHWAY 49.

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
Mount Diablo 003S 016E 03,10,11 California

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Ankerite Gangue
Quartz Gangue

Alteration

  • (Local) Oxidation By H2so4

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate
    Stratigraphic age (youngest) Late Jurassic
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite

Nearby scientific data

(1) -120.19793, 37.6952
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description Thrust Fault

Ore body information

  • Strike N 50 W
    Dip 60 - 75 NE
    Thickness 6.1M
    Width 30.48M
    Depth to top 0M

Controls for ore emplacement

  • Footwall Side Of Qtz. Sheet

Comments on the geologic information

  • BLACK SLATE IS ONE OF HOST ROCK. ; GEOL.DESC: GREENSTONE DERIVED FROM PYROXENE ANDESITE OF PALEOZOIC CALAVERAS FM. FROM HANGING WALL. FOOTWALL SLATE IS PROBABLY PART OF THE UPPER JURASSIC MARIPOSA FM. MARY HARRISON VEIN IS TRACEABLE FROM THE COUNTY LINE ON THE NORTH TO THE VIRGINIA MINE ON THE SOUTH. IT IS CHARACTERISED BY A PROMINANT, MASSIVE SHEET OF MILKY QUARTZ 4 - 20 FT. THICK BETWEEN IRREGULAR, RIBBONED MASSES OF QTZ.-MARIPOSITE-PYRITE ROCK, THE UPPER PARTS OF WHICH ARE COMMONLY CONVERTED TO POROUS, EARTHY MASSES OF YELLOWISH BROWN IRON AND SILICA OXIDES.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Medium
Significant No
Discovery year 1852
Production years 1852 - 1867 - 1878 - 1894 1897 - 1904

Mining district

District name Coulterville

Ownership information

  • Type Operator
    Owner Lautenschlager, Walter J.

Comments on the production information

  • BETWEEN $330,000 AND $400,000 PRODUCED BETWEEN 1895 & 1903 AT $5 AU/TON IN 1897 .

Workings at the site

  • Type of workings Underground
    Length 2133.6M
    Overall depth 365.76M

Comments on the workings information

  • 1200 FT. VERTICAL SHAFT WITH LEVELS AT 100 FT. INTERVALS, A SECOND INCLINED SHAFT ALSO WITH LEVELS AT 100 FT. INTERVALS, AN AIRSHAFT. MORE THAN 5000 FT. DRIFTS.

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. 130 - 132 .

  • Deposit

    CASTELLO, W. O., 1921 , MINES AND MINERAL RESOURCES OF MARIPOSA COUNTY IN SEVENTEENTH REPORT OF THE STATE GEOLOGIST: CALIFORNIA STATE MINING BUREAU, P. 124 - 125 .

  • Deposit

    LOGAN, C. A., 1935 , THE MOTHER LODE BELT OF CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 108 , P. 185 .

  • Deposit

    LAIZURE, C. MCK., 1928 , SAN FRANCISCO FIELD DIVISION IN TWENTY-FOURTH REPORT OF THE STATE MINERALOGIST: CALIFORNIA STATE MINING BUREAU, P. 100 .

  • 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 IN THRUST FAULT FISSURE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey
Updater 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.