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Gem

Past Producer in Tuolumne county in California, United States with commodities Gold, Lead
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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. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10034546
MRDS ID M021367
Record type Site
Current site name Gem
Alternate or previous names Gem & Senate ?
Related records 10238301

Geographic coordinates

Geographic coordinates: -120.1296, 38.0702 (WGS84)
Relative position ABOUT 7 MILES N.E. OF CONFIDENCE, ON THE N. FORK OF THE TUOLUMNE RIVER.

Site location context

Political divisions (FIPS codes)

Tuolumne(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Twain Harte(quadrangle 1:24,000 scale)

San Andreas(quadrangle 1:100,000 scale)

Sacramento(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

Stanislaus National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Tuolumne

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 003N 017E 32 California

Comments on the location information

  • LOCATION APPROXIMATED

Commodities

Commodity Importance
Gold Primary
Lead Tertiary

Comments on the commodity information

  • ORE RICH IN SULFIDES

Materials information

Materials Type of material
Galena Ore
Gold Ore
Pyrite Ore

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1) -120.1296, 38.0702
ListMap

Economic information

Ore body information

  • General form TABULAR
    Strike N 65 E
    Dip 65 SE

Comments on the geologic information

  • GEOL.DESC: BOTH GEM AND SENATE VEINS, ON ADJACENT CLAIMS HAVING A POSING ORIENTATIONS. THE SENATE VEIN STRIKES N 15 W, AND DIPS 60 NE. BOTH VEINS HAVE AVERAGE THICKNESS OF 18 INCHES

Economic information about the deposit and operations

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

Comments on the production information

  • NO PRODUCTION FIGURE FOUND.

Comments on the workings information

  • CROSSCUT ADIT 380 FT. INTERSECTING VEIN 230 FT FROM PORTAL WITH 200 FT OF DRIFT AND 50 FT. WINZE ON GEM VEIN.

Reference information

Bibliographic references

  • Deposit

    TUCKER, W.B., 1914 , TUOLUMNE COUNTY: CMB REPT. 14 , P 149

General comments

Subject category Comment text
Deposit KIDNEY SHAPED ORE FROM VEINS
Deposit THIS MINE IS ONE OF SEVERAL CLAIMS IN A GROUP LISTED AS FOLLOWS: GEM, REPRESENTATIVE, SENATE, EDITH, CONGRESS, ASSEMBLY, IOLA, FAITH PLACER MINE, HOPE PLACER MINE, AND CHARITY PLACER MINE.

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.