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Pena Blanco Mines Group

Past Producer in Tuolumne 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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10034605
MRDS ID M021445
Record type Site
Current site name Pena Blanco Mines Group
Related records 10141847

Geographic coordinates

Geographic coordinates: -120.47267, 37.96713 (WGS84)
Relative position ABOUT 1 1/4 MILES W. OF RAWHIDE MINE

Site location context

Political divisions (FIPS codes)

Tuolumne(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sonora(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(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 Tuolumne

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001N 014E California

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore

Nearby scientific data

(1) -120.47267, 37.96713
ListMap

Economic information

Ore body information

  • Thickness 9.14M

Comments on the geologic information

  • GEOL.DESC: QUARTZ EXPOSURES ON SURFACE ARE MASSIVE COVERING THE A SUMMIT OF THE HILL FOR A THICKNESS OF ALMOST 150 FT. A FAULT HAS DISPLACED THE ORE VEIN NEAR THE SURFACE. A SECOND VEIN OF UNKNOWN THICKNESS OCCURS ON THE FOOTWALL, BEING SEPARATED FROM THE CONTACT VEIN BY CLAY AND SLATY ROCK WITH MUCH QUARTZ IN SMALL VEINS.

Economic information about the deposit and operations

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

Comments on the workings information

  • CROSSCUT ADIT 135 FT. ON HANGING WALL, NOT REACHING VEIN. SECOND CROSSCUT ADIT 200 FT., SITUATED TO THE SOUTH OF FIRST ADIT.

Reference information

Bibliographic references

  • Deposit

    CRAWFORD, J.J., 1896 , THIRTEENTH REPT. OF THE STATE MINERALOGIST: CMB REPT. 13 , P. 488

  • Deposit

    TUCKER, W.B., TUOLUMNE COUNTY: CMB REPT. 14 , P. 159

General comments

Subject category Comment text
Deposit THIS GROUP OF CLAIMS INCLUDES PENA BLANCO, DOCTOR, LOOKOUT, LUCKY STAR, AND SARAH FRANCIS. PENA BLANCO IS THE PRINCIPAL CLAIM

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1978 Tatkin, T.; Albers, John P. 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.