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Union Cordova & Rathger

Past Producer in Calaveras county in California, United States with commodities Gold, Silver, Uranium
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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 10028902
MRDS ID M006151
Record type Site
Current site name Union Cordova & Rathger
Related records 10187162

Geographic coordinates

Geographic coordinates: -120.65629, 38.1563 (WGS84)
Relative position 2 1/2 MI SSE OF SAN ANDREAS

Site location context

Political divisions (FIPS codes)

Calaveras(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

San Andreas(quadrangle 1:24,000 scale)

San Andreas(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Calaveras(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 004N 012E 33 California

Comments on the location information

  • UTM ACC E 1/2

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Uranium Tertiary

Comments on the commodity information

  • FINENESS OF BULLION PRODUCED WAS 0.929 AU AND 0.061 SILVER.

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Uraninite Ore
Calcite Gangue
Quartz Gangue

Host and associated rocks

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

Nearby scientific data

(1) -120.65629, 38.1563
ListMap

Economic information

Ore body information

  • Strike N 30 W
    Dip 70 NE

Comments on the geologic information

  • UNION LEDGE MATTER, OF QTZ & SCHIST, IS 30 FT THICK AT 120 FT LEVEL AND THICKENS W DEPTH. IN QTZ & ASSOCIATED W. AU WERE BLACK ACICULAR XTLS OF URANINITE W. YELLOW URANIUM OXIDE. RATH GEB VEIN, 1/2 MI NE STRIKES N, DIPS 70 E, 1 - 6 FT THICK BLACK SLATE HANGING WALL, AMPHIBOLITE SCHIST FOOTWALL.

Economic information about the deposit and operations

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

Comments on the production information

  • TOTAL OUTPUT OF PROPERTIES UNKNOWN. REPORTED THAT RATHGERS RECOVERED $175,000 FROM ABOVE 120 FT LEVEL OF UNION MINEIN 1954 THE URAVAN URANIUM AND OIL COMPANY OF SALT LAKE CITY, UTAH, LEASED THE PROPERTY TO EXPLORE FOR URANIUM. THE UNION SHAFT WAS CLEANED OUT TO A DEPTH OF 150 FT, BUT NO URANIUM WAS FOUND.

Comments on the workings information

  • UNION - 455 FT INCLINED SHAFT W LEVELS AT 120 , 160 , 220 , 350 AND 430 FT. 3 OTHER SHALLOW SHAFTS. RATH GEV - 220 FT SHAFT W LEVELS AT 120 & 200 FT

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. 71 - 72 , 185

  • Deposit

    LOGAN, C. A., FRANKE, H., 1936 , MINES AND MINERAL RESOURCES OF CALAVERAS CO.: CDM CALIF. JOUR. MINES & GEOL., VOL. 32 , NO. 3 , P. 291

  • Production

    CLARK, 1962

General comments

Subject category Comment text
Deposit VEIN, POCKET

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.