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  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Sheppard Mine

Past Producer in El Dorado county in California, United States with commodities Chromium, Iron
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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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Land status
  13. Ownership information
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10114938
MAS/MILS ID 0060170594
Record type Site
Current site name Sheppard Mine
Alternate or previous names Sheppard

Geographic coordinates

Point of reference Ore Body
Geographic coordinates: -120.88633, 38.85429 (WGS84)
Elevation 566
Location accuracy 500(meters)

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 012 N 010 E 32 C N2N2 California

Commodities

Commodity Importance
Chromium Critical Tertiary
Iron Tertiary

Materials information

Materials Type of material
Chromite Unknown
Serpentine Unknown

Nearby scientific data

Ore Body (1) -120.88633, 38.85429
ListMap

Economic information

Ore body information

  • Strike N30E
    Dip 60S
    Thickness 0M
    Length 0M
    Width 0M
    Depth to top 0M
    Field Value
    Type of Orebody #1 DISSEMINATED
    Shape of Orebody #1 MASSIVE
    Shape of Orebody #2 LENTICULAR
    Primary mode of Origin MAGMATIC DIFFER
    Primary Ore Control LITHOLOGY
    Degree of Wallrock Alter. INTENSE
    Type of Wallrock Alter. #1 CARBONITIZATION
    Strike And Dip N30E:60S
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 780213

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Significant No
Discovery year 1916
Year of first production 1917

Mining district

District name Gardn Vlly Area

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner D. L. Sheppard
    Home office California
    Year 1976
  • Type Lessee/Operator
    Owner Union Chrome Co.-Lessee
    Home office California
    Year 1976

Comments on the production information

  • ALTHOUGH PRODUCTION RECORDS WERE OFFICIALLY RECORD,TALIAFERR S THAT 50 LONG TONS OF ORE WAS SHIPPED,BY AUGUST 1,1918. THE ORE CONTAINED 34.5 PERCENT CR2O3. INSUFFICIENT DATA FOR MATRIX CALCULATIONS.

Reference information

Bibliographic references

  • Deposit

    CATER,F.W. ET.AL,1951,CDM AND G BULL 134,PT.3,CHAP.4,P.159-

  • Deposit

    CAL.JOUR MINES & GEOL,1956,VOL.52,NO.4,P.474

Reporter information

Type Date Name Affiliation Comment
Reporter 22-MAY-1986 Unknown U.S. Bureau of Mines

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.