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  3. Mineral Resource Data System (MRDS)

Louisa

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. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Land status
  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 10102848
MRDS ID M009307
Record type Site
Current site name Louisa
Alternate or previous names Louise, Louise Point
Related records 10236134

Geographic coordinates

Geographic coordinates: -120.19627, 37.70742 (WGS84)
Elevation 526
Relative position NW1/4; ASTRIDE HIGHWAY 49, 1/4 MI. S. 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
Mount Diablo 003S 016E 03 California

Comments on the location information

  • UTM ACC. NW 1/4

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Ankerite Gangue
Quartz Gangue

Alteration

  • (Local) Hydrothermal Alteration Of Serpentine

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 Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Nearby scientific data

(1) -120.19627, 37.70742
ListMap

Economic information

Ore body information

  • General form TABULAR TO LENTICULAR
    Strike N 40 - 45 W
    Dip 70 - 75 NE
    Thickness 6.1M
    Width 91.44M
    Depth to top 0M

Controls for ore emplacement

  • Hanging Wall Or Footwall Side Of Massive Quartz Subveins.

Comments on the geologic information

  • GEOL.DESC: BULK OF THE VEIN CONSISTS OF QUARTZ, MARIPOSITE, ANKERITE ROCK DERIVED FROM HYDRO THERMAL ALTERATION OF SERPENTINE. UPPER OXIDISED PART OF THE VEIN HAS BEEN CONVERTED TO A SPONGY, RUST COLORED, EARTHY ROCK CONSISTING CHIEFLY OF YELLOW IRON OXIDES INTERMIXED WITH QUARTZ STRINGERS. THE VEIN SYSTEM LIES ALONG THE CONTACT OF THE AMADOR GROUP AND MARIPOSA FORMATION.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1855
Production years 1894 - 1900

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Lautenschlager, Walter J.

Comments on the production information

  • PRINCIPAL ACTIVITY 1894 - 1900 WHEN OPERATORS SPENT MORE THAN $56,000 IN IMPROVEMENTS & DEVELOPMENT.

Workings at the site

  • Type of workings Underground
    Length 723.9M
    Overall depth 114.3M

Comments on the workings information

  • VERTICAL NELSON SHAFT 375 FT. W/3 LEVELS AND AIR SHAFT 150 FT. DEEP, 850 FT. DRIFTS, CROSSCUTS 775 FT. AND 600 FT. WINZES.

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. 119 - 120 , 278 .

  • Deposit

    CASTELLO, W. O., 1921 , MINES AND MINERAL RESOURCES OF MARIPOSA COUNTY IN SEVENTEENTH REPORT OF THE STATE GEOLOGIST: CALIFORNIA STATE MINING BUREAU. P. 122 .

  • Deposit

    LAIZURE, C. MCK., 1928 , SAN FRANCISCO FIELD DIVISION IN TWENTY-FOURTH REPORT OF THE STATE MINERALOGIST: CALIFORNIA STATE MINING BUREAU. P. 96 .

  • 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

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.

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.