1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Big Oak Flat No. 1

Past Producer in Tuolumne county in California, United States with commodities Gold, Silver, Zinc, Lead, Copper
Map
XML
JSON
KML
C
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. Reporter information

Geologic information

Identification information

Deposit ID 10034513
MRDS ID M021323
Record type Site
Current site name Big Oak Flat No. 1
Alternate or previous names Conrad
Related records 10141701

Geographic coordinates

Geographic coordinates: -120.26266, 37.82742 (WGS84)
Relative position AT BIG OAK FLAT

Site location context

Political divisions (FIPS codes)

Tuolumne(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Moccasin(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Tuolumne(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CA)

Bureau of Land Management CA BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States California Tuolumne

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001S 016E 30 California

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Zinc Critical Tertiary
Lead Tertiary
Copper Tertiary

Materials information

Materials Type of material
Chalcopyrite Ore
Copper Ore
Galena Ore
Gold Ore
Sphalerite Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Granitoid > Granite

Economic information

Ore body information

  • Thickness 1.22M

Economic information about the deposit and operations

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

Workings at the site

  • Type of workings Underground
    Area 6.071HA

Comments on the workings information

  • SHAFT 50 FT REPORTED IN 1896

Reference information

Bibliographic references

  • Deposit

    CRAWFORD, J. J., 1896 , THIRTEENTH REPT. OF THE STATE MINERALOGIST: CMB REPT. 13 , P 474

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1978 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.