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Big Lode

Past Producer in Mariposa county in California, United States with commodities Gold, Silver
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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. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Mining district
  14. Ownership information
  15. Production statistics
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10030996
MRDS ID M009529
Record type Site
Current site name Big Lode
Related records 10261134

Geographic coordinates

Geographic coordinates: -120.12682, 37.64353 (WGS84)
Relative position 7 MI. SE OF COULTERVILLE

Site location context

Political divisions (FIPS codes)

Mariposa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Coulterville(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Merced(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Mariposa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 003S 017E 29,30 California

Comments on the location information

  • NEAR HEAD OF FLYAWAY GULCH UTM EST. WORKINGS MAY BE THOSE NEAR COMMON 1/4 COR. COULTERVILLE QUAD.

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Materials information

Materials Type of material
Gold Ore
Silver Ore
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro > Norite
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite

Nearby scientific data

(1) -120.12682, 37.64353
ListMap

Economic information

Ore body information

  • Strike N 50 W
    Dip 58 NE

Controls for ore emplacement

  • Multiple Dikes Of Albitite, Norite, Diorite

Comments on the geologic information

  • GEOL.DESC: SHEARED GREENSTONE. IN ADDITION TO POCKETS OF AU WHICH OCCUR IN BOTH ALBITITE & QUARTZ, THERE ARE MASSES OF MINERALIZED SERPENTINE WHICH CONTAIN GOLD.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years 1913

Mining district

District name Coulterville

Ownership information

  • Type Operator
    Owner Jas K., Bernard, John Lindsay

Production statistics

  • Year 1913
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^.1 Oz/Ton Ag
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Silver Silver 3g/mt
  • Year 1913
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^.66 Oz/Ton Au
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Gold Gold 19g/mt

Comments on the production information

  • DURING 1913, 117 TONS OF ORE MINED BY G. A. HELANDER OF COULTERVILLE YIELDED 68.02 OZ. GOLD AND 13 OZ. SILVER. IDLE.

Comments on the workings information

  • SHAFT & ADIT? SHAFT. INACCESSIBLE IN SEPT. 1954 .

Reference information

Bibliographic references

  • Deposit

    CLARK, W. B., 1970 , GOLD DISTRICTS OF CALIF.: CDM BULL. 193 , P. 42 .

  • Deposit

    BOWEN, O. E., JR., & GRAY, H., JR., 1957 , MINES AND MINERAL DEPOSITS OF MARIPOSA COUNTY, CALIF.: CALIF. JOUR. MINES & GEOL., VOL. 53 , NOS. 1 & 2 , P. 240 .

  • Deposit

    LAIZURE, C. MCK., 1928 , S. F. FIELD DIV. - MARIPOSA COUNTY: 24TH REPORT STATE MINERALOGIST, VOL. 24 , NO. 2 , P. 124 .

  • Production

    BOWEN & GRAY, 1957 .

General comments

Subject category Comment text
Deposit QUARTZ VEIN
Deposit ONE OF THE FLYAWAY GROUP.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey
Updater 01-DEC-1978 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.