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  3. Mineral Resource Data System (MRDS)

Big Canyon

Past Producer in El Dorado 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. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10006918
MRDS ID C007727
Record type Site
Current site name Big Canyon
Alternate or previous names Oro Fino
Related records 10211038

Geographic coordinates

Geographic coordinates: -120.90602, 38.6109 (WGS84)
Elevation 247
Relative position 4 1/2 MI. S OF SHINGLE SPRINGS

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Latrobe(quadrangle 1:24,000 scale)

Placerville(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Cosumnes(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California El Dorado

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 009N 010E 29 NW 1/4NW 1/4 California

Comments on the location information

  • Location corrected based on PLS using GIS. ACC NW 1/4 OF NW 1/4 SEC

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Gold Ore
Pyrite Ore
Pyrrhotite Ore
Albite Gangue
Quartz Gangue

Analytical data

Result FREE GOLD 20 % OF AU IN ORE REMAINDER IN PYRITE AND PYRRHOTITE.

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Metasedimentary Rock
    Rock unit name Calaveras Complex
    Rock description Calaveras Complex
    Stratigraphic age (youngest) Pennsylvanian
    Stratigraphic age (youngest) Pennsylvanian
  • Host or associated Associated
    Rock type Metamorphic Rock > Serpentinite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Nearby scientific data

(1) -120.90602, 38.6109
ListMap

Economic information

Ore body information

  • Strike N 25 E
    Dip 35 E
    Thickness 18.29M
    Depth to top 0M

Controls for ore emplacement

  • Best Ore Contained Equal Parts Of Albite, Ankerite And Quartz With Albite Favorable For Gold Deposition

Comments on the geologic information

  • IN SHEAR ZONE WITH AMPHIBOLITE TO W AND SERPENTINE LENSE TO E, E OF SERPENTINE ARE METASEDIMENTARY ROCKS OF CALAVERAS GROUP. ORE BODY DIPS UP TO 40 E. THREE PERIODS OF SULFIDE MINERALIZATION; THE FIRST IS OF ARSENOPYRITE, THE SECOND OF BARREN PYRITE AND THE THIRD OF AURIFEROUS PYRITE.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years 1893 - 1901 , 1934 - 1940

Comments on the production information

  • ACTIVE PRIOR 1888 , 1893 - 1901 , 1915 , 1934 - 1940

Comments on the workings information

  • DEVELOPED BY 200 FT. VERTICLE SHAFT AND A 540 FT. AT A 40 DEG. INCLINE, ORE STOPED TO SURFACE FROM 500 FT. LEVEL. ANOTHER 620 FT. SHAFT WAS SUNK ON A 45 DEG. INCLINE, ALSO MINED BY OPEN PIT. STOPES 450 FT. LONG AND UP TO 60 FT. WIDE.

Reference information

Bibliographic references

  • Deposit

    CLARK, W. B., AND CARLSON, D. W., 1956 , MINES AND MINERAL RESOURCES OF EL DORADO CO., CALIF.: CALIF. JOUR. OF MINES AND GEOL., VOL 52 , NO. 4 , PG. 408 & 487 AND PL 10 .

  • Deposit

    LOGAN, C. A., 1938 , MIN. RESOURCES OF EL DORADO CO.: CALIF. JOUR. OF MINES AND GEOL., VOL. 34 , NO. 3 , PG 220 - 223 , 238 AND PL II.

  • Production

    CLARK 1956

General comments

Subject category Comment text
Deposit VEIN-LIKE MASS OF SHEARED AND BRECCIATED META-ANDESITE

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1979 Mateik, R.; Albers, John P. 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.