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Shelley Mine

Past Producer in El Dorado county in California, United States with commodity Chromium
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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. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Mining district
  14. Land status
  15. Ownership information
  16. Production statistics
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10043724
MRDS ID M100637
Record type Site
Current site name Shelley Mine
Alternate or previous names Wolf Mine

Geographic coordinates

Geographic coordinates: -120.88019, 38.83379 (WGS84)
Elevation 567
Relative position APPROX. 2.5 MI N-NE OF COLOMA, CA

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Coloma(quadrangle 1:24,000 scale)

Placerville(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Fork American(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(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 011N 010E 05 NE California

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore
Talc Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Harzburgite
  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite

Nearby scientific data

(1) -120.88019, 38.83379
ListMap

Economic information

Geologic structures

Type of structure Local
Structure description A Shear Zone Cuts Across Ultramafic Body, Striking N-S And Dipping 70 W.

Ore body information

  • General form TABULAR
    Length 51.82M

Comments on the geologic information

  • MINE LOCATED ON EASTERN EDGE OF IRREGULARLY SHAPED ULTRAMAFIC MASS WITH TWO N-S-TRENDING ARMS, EACH 1/4 - 1/2 MI THICK THAT JOIN TOWARDS THE SOUTH, GIVING THE MASS A SYNCLINAL APPEARANCE.

Economic information about the deposit and operations

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

Mining district

District name Garden Valley Area

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Cole, D. And C.
    Home office Cupertino, Ca

Production statistics

  • Year 1917
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^Average 30% Cr2o3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Chromium Chromium 30wt-pct
  • Year 1918
    Material ORE
    Accuracy Accurate
    Description Ap_Grade: ^Average 30% Cr2o3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Chromium Chromium 30wt-pct

Comments on the reserve resource information

  • ESTIMATE APPROX 5-6 TONS OF ORE REMAINING ON VARIOUS DUMPS.

Comments on the workings information

  • WORKINGS CONSISTED OF A LARGE 30 FT DEEP PIT, A 15 FT SHAFT AND SEVERAL PROSPECT PITS.

Reference information

Bibliographic references

  • Deposit

    STINSON, M.C., 1976, MINERAL PROPERTY REPORT, CDMG UNPUBLISHED REPORT.

  • Deposit

    CDMG BULL 134, PT. 3, CHAPT. 4, P. 158

  • Production

    CDMG BULL 134, P. 158

  • Reserve-Resource

    CDMG BULL 134, P. 138

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1980 Oster, Karel L. (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.