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  3. Mineral Resource Data System (MRDS)

Brown

Past Producer in Calaveras county in California, United States with commodities Gold, 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. Workings at the site
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10102731
MRDS ID M006509
Record type Site
Current site name Brown
Alternate or previous names Confidence, Dead Horse, Jackson, Little Nugget, Raspberry, Stickles, Utica, Washington

Geographic coordinates

Geographic coordinates: -120.53934, 38.07019 (WGS84)
Relative position IN ANGELS CAMP

Site location context

Political divisions (FIPS codes)

Calaveras(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Angels Camp(quadrangle 1:24,000 scale)

San Andreas(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Stanislaus(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Calaveras

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 003N 013E 33,34 California

Comments on the location information

  • UTM ACC. NE 1/4 SEC 33 , NW 1/4 34

Commodities

Commodity Importance
Gold Primary
Copper Tertiary

Comments on the commodity information

  • HIGH GRADE POCKETS, BOTH AND COUNTRY RX CONTAIN FREE GOLD & AURIFEROUS PYRITE. RICHEST ORE IS "BROWN QUARTZ", A FINE GRANULAR AGGREGATE OF QTZ, DOLOMITE, & SOMETIMES ALBITE, THICKLY SPECKLED W SMALL XTLS OF PYRITE.

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Pyrite Ore
Albite Gangue
Calcite Gangue
Dolomite Gangue
Quartz Gangue
Sericite Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -120.53934, 38.07019
ListMap

Economic information

Ore body information

  • General form LENTICULAR
    Strike NW
    Dip 70 NE

Comments on the geologic information

  • LENTICULAR QTZ-CALCITE VEINS SEPERATED BY VARIOUS THICKNESSES OF FISSURED AMPHIBOLITE, CHLORITIC AND TALCOSE SCHIST. SOUTH PORTION OF MINE MORE HIGHLY SHEARED THAN NORTH. ORE BODIES ARE COMPLEX NETWORK OF STRINGERS AND MINERALIZED COUNTRY ROCK. STOPING THICKNESSES VARIED FROM 10 - 100 FT. STICKLES MINE TO SOUTH IS SIMILAR BUT MORE SHEARED AND FISSILE. MOST STRINGERS FOLLOW SCHISTOSITY, OTHERS TRAVERSE IT IN ALL DIRECTIONS. WESTERLY LEAD 60 - 90 FT THICK, EASTERLY 20 - 30 FT. BROWN QTZ SOMETIMES WELL-DEFINED STRINGERS, ALSO INTIMATELY ASSOC. W COUNTRY ROCK & ALTERATION. STRINGERS DIP EASTERLY NEARLY VERT.

Economic information about the deposit and operations

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

Comments on the production information

  • UTICA MINE IS CREDITED W. TOTAL PRODUCTION OF $17,000,000 AT OLD PRICE OF GOLD STICKLE CLAIM ACTIVE IN 1860S . FROM 1893 - 1895 UTICA OUTPUT WAS $4,154,026 . IDLE SINCE 1915 EXCEPT FOR DUMP CLEANUPS IN THE 1930S . BULK OF PRODUCTION CAME ABOVE 1300-FT LEVEL.

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 929.64M
    Overall length 1869.95M

Comments on the workings information

  • MAIN SHAFTS - 1470 & 2100 FT CROSS, 1000 FT STICKLE, & N & S UTICA SHAFTS. THOUSANDS OF FT OF WINZES, LEVELS, CROSSCUTS. 900 FT NW OF CROSS SHAFT VERTICAL WINZE WAS SUNK TO 2850 FT LEVEL, W 300 FOOT CROSSCUT AND ANOTHER WINZE TO THE 3050 FT LEVEL.

Reference information

Bibliographic references

  • Deposit

    CLARK, W. B., & LYDON, P. A., 1962 , MINES AND MINERAL RESOURCES OF CALAVERAS COUNTY, CALIF.: CALIF. DIV. MINES & GEOL., COUNTY REPORT 2 , P. 72 , 73 , 186 , FIG 10

  • Deposit

    ERIC, J. H., STROMQUIST, A. A., & SWINNY, C. M., 1955 , GEOL. OF THE ANGELS CAMP AND SONORA QUADS., CALAVERAS & TUOLOMNE COS: CALIF. DIV. MINES SPEC. REPORT. 41 , P. 42 , 49 - 51

  • Deposit

    LOGAN, C. A., 1935 , MOTHER LODE GOLD BELT OF CALIF.: CDM BULL. 108 , P 149 - 51

  • Production

    CLARK, 1962

General comments

Subject category Comment text
Deposit VEIN, POCKETS

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1979 Hayden, F. (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.