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Marposa

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. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  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 10031178
MRDS ID M009793
Record type Site
Current site name Marposa

Geographic coordinates

Geographic coordinates: -119.95848, 37.48882 (WGS84)
Elevation 632
Relative position 1 MI. EAST OF MARIPOSA

Site location context

Political divisions (FIPS codes)

Mariposa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mariposa(quadrangle 1:24,000 scale)

Shaver Lake(quadrangle 1:100,000 scale)

Mariposa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Fresno River(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 005S 018E 23,24 California

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone

Nearby scientific data

(1) -119.95848, 37.48882
ListMap

Economic information

Ore body information

  • Strike N 70 W
    Dip 60 - 70 SW
    Thickness 3.66M
    Depth to top 0M

Controls for ore emplacement

  • Pockets

Comments on the geologic information

  • GEOL.DESC: EAST OF THE MAIN SHAFT THE MARIPOSA VEIN STRIKES N 70 W, AND DIPS 60 - 70 SW. BETWEEN THE MAIN AND OLD SHAFTS THE VEIN BRANCHES WITH ONE BRANCH STRIKING OFF AT N 50 W. VEIN WIDTHS VARY FROM 2 - 5 FT. WIDE EAST OF THE JUNCTION LINE OF THE TWO BRANCHES. THE BRANCHES DO NOT AVERAGE MORE THAN TWO FEET WIDE. VEIN MATTER IS MILKY QUARTZ, COMMONLY RIBBONED TOWARD THE BORDERS BY THIN INCLUSIONS OF WALL ROCK.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Medium
Significant Yes
Discovery year 1849
Production years 1849 - 1859 , 1859 - 1864 , 1864 - 1870 , 1900 - 1915 , 1927 - 1932 , 1952 - 1955

Mining district

District name Mariposa

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner George Adams
    First year 1957
  • Type Owner
    Owner Mrs. Frank E. Gallagher

Comments on the production information

  • GRADE OF ORE FELL FROM $25 IN 1864 TO $10 - 11/TON IN 1870 . 1927 STATE HIWAY COMMISSION PRODUCED 35,000 TONS AT CRUSHED ROCK OF UNANNOUNCED VALUE FROM MARIPOSA DUMPS. 1927 - 1932 LESSEES WORKED THE EXTENSION OF THE MARIPOSA VEIN, TAKING OUT ABOUT 1500 TONS OF LOW GRADE ORE & SEVERAL SMALL HIGH-GRADE POCKETS.

Workings at the site

  • Type of workings Underground
    Length 2402.43M
    Overall depth 472.44M

Comments on the workings information

  • WORKINGS INCLUDE OLD UNUSABLE SHAFT 475 FT. DEEP, THREE COMPARTMENT MAIN SHAFT 1550 FT. DEEP WITH 8 LEVELS & 5757 FT. OF DRIFTS. MOST OF THE ORE HAS BEEN STOPED OUT ABOVE THE 800 FT. LEVEL AND THERE ARE A NUMBER OF RAISES AND CROSSCUTS AS WELL AS A DRAINAGE 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. 128 - 130 , 281 .

  • 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 .

  • Deposit

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

  • Deposit

    LOGAN, C. A., 1935 , THE MOTHER LODE BELT OF CALIFORNIA: CALIFORNIA DIVISION OF MINES BULLETIN 108 , P. 184 - 185 .

  • Deposit

    5) LAIZURE, C. MCK., 1928 , SAN FRANCISCO FIELD DIVISION IN TWENTY-FOURTH REPORT OF THE STATE MINERALOGIST: CALIFORNIA STATE MINING BUREAU, P. 99 - 100 .

  • Production

    BOWEN & GRAY 1957

General comments

Subject category Comment text
Deposit VEIN
Deposit DISCOVERY CREDITED TO KIT CARSON AND TWO ASSOCIATES. LAND WAS INCLUDED IN LAS MARIPOSAS GRANT OWNED BY J. C. FREMONT. VEIN MATTER IS MILKY QUARTZ, COMMONLY RIBBONED TOWARD THE BORDERS BY THIN INCLUSIONS OF WALL ROCK, WITH NATIVE GOLD, PYRITE AND ARSENOPYRITE; HIGH -GRADE POCKETS NEARLY ALWAYS CONTAIN ARSENOPYRITE, TWO POCKETS ARE REPORTED TO HAVE YIELDED $30,000 AND $15,000. ACTIVE IN 1955 . POSSIBLY STILL ACTIVE.
Deposit Discovery Year: SPRING, 1849

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.