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  3. Mineral Resource Data System (MRDS)

Big Seven

Past Producer in Calaveras county in California, United States with commodities Gold, Zinc, 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 10028802
MRDS ID M006011
Record type Site
Current site name Big Seven
Related records 10211410

Geographic coordinates

Geographic coordinates: -120.63545, 38.00408 (WGS84)
Elevation 419
Relative position IN CHRISTIAN GULCH 2 MI N. OF COPPEROPOLIS

Site location context

Political divisions (FIPS codes)

Calaveras(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Salt Spring Valley(quadrangle 1:24,000 scale)

San Andreas(quadrangle 1:100,000 scale)

Sacramento(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 Calaveras

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 002N 012E 22,27 California

Comments on the location information

  • UTM ACC, SE SEC OF 20 NE SEC. 27

Commodities

Commodity Importance
Gold Primary
Zinc Critical Secondary
Lead Secondary

Comments on the commodity information

  • 24% AV FREE.REMAINDER IN SULFIDES. SMALL PIECE OF OR E, MAINLY QUARTZ AND BARITE, RAN $ 12 PER TON IN GOLD.

Materials information

Materials Type of material
Galena Ore
Gold Ore
Pyrite Ore
Sphalerite Ore
Barite Gangue
Calcite Gangue
Quartz Gangue
Sericite Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -120.63545, 38.00408
ListMap

Economic information

Ore body information

  • Strike NW
    Dip NE
    Width 91.44M

Comments on the geologic information

  • GEOL.DESC: MINERALIZED ZONE ABOUT 300 FT WIDE OF ALTERED CALCITE, QUARTZ, BARITE AND SERICITE SCHIST

Economic information about the deposit and operations

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

Comments on the production information

  • ACTIVE PRIOR AND 1936 , NO PRODUCTION RECORD FOUND

Comments on the workings information

  • DEVELOPED BY 110 FT INCLINED SHAFT WITH LEVELS AT 50 AND 100 FT. ON 50 FT LEVEL THERE IS 30 FT WESTWARD CROSSCUT AND FROM 110 FT LEVEL A 75 FT DRIFT SOUTHWARD. AN 80 FT ADIT HAS BEEN DRIVEN SOUTHWARD

Reference information

Bibliographic references

  • Deposit

    CLARK, W.B., LYDON, P.A., 1962 , MINES AND MINERAL RESOURCES OF CALAVERAS COUNTY, CALIF.; COUNTY REPORT 2 ; CALIF. DIV. OF MINES AND GEOLOGY, P. 138 AND PLB

  • Deposit

    LOGAN, C.A., FRANKE, H., 1936 , MINES AND MINERAL RESOURCES OF CALAVERAS COUNTY; CALIF. JOUR. MINES AND GEOLOGY, VOL. 32 , NO. 3 ; DIV. OF MINES, P 243 , 298

  • Production

    CLARK ( 1962 ), LOGAN ( 1936 )

General comments

Subject category Comment text
Deposit VEIN, MINERALIZED ZONE ABOUT 300 FT WIDE OF ALTERED CALCITE, QTZ, BARITE AND SERICITE SCHIST

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-1979 Mateik, R.; Albers J. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

External references

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.