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  3. Mineral Resource Data System (MRDS)

Gem

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. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Land status
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10105955
MRDS ID W026066
Record type Site
Current site name Gem
Related records 10141736

Geographic coordinates

Geographic coordinates: -120.43711, 37.94714 (WGS84)
Elevation 1268
Relative position ABOUT 1 MILE SW OF JAMESTOWN, ON THE MOTHER LODE.

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 Tuolumne(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 16 California

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Slate

Nearby scientific data

(1) -120.43711, 37.94714
ListMap

Economic information

Ore body information

  • Strike NW
    Dip 45 - 50 E

Economic information about the deposit and operations

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

Land status

Ownership category Private

Workings at the site

  • Type of workings Underground
    Overall depth 53.34M

Comments on the workings information

  • MAIN ADIT INTERSECTED BY VERTICAL SHAFT 175 FT, AND A WINZE 85 FT., EXTENDING FROM ADIT.

Reference information

Bibliographic references

  • Deposit

    IRELAN, WM. JR., 1890 , TENTH REPT. OF THE STATE MINERALOGIST: CMB REPT. 10 , P. 663

General comments

Subject category Comment text
Deposit AT LEAST ONE ORE SHOOT 500 FT IN LENGTH HAD BEEN WORKED.
Deposit THIS MINE LOCATED 1878 .

Reporter information

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