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Steele 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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  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. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10043725
MRDS ID M100638
Record type Site
Current site name Steele Mine

Geographic coordinates

Geographic coordinates: -121.07825, 38.76822 (WGS84)
Relative position APPROX 16 MI SW OF AUBURN

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Pilot Hill(quadrangle 1:24,000 scale)

Sacramento(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;011N 008E;008E 33;34 NE (33); NW OF NW (34) California

Commodities

Commodity Importance
Chromium Critical Primary
Iron Secondary

Materials information

Materials Type of material
Chromite Ore
Antigorite Gangue
Chlorite Gangue
Magnesite Gangue
Magnetite Gangue
Opal Gangue

Alteration

  • (Local) Serpentinization Of Peridotite

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Lherzolite
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite

Nearby scientific data

(1) -121.07825, 38.76822
ListMap

Economic information

Ore body information

  • General form IRREGULAR
    Strike N 55 W
    Dip 50 E
    Thickness 0M
    Length 60.96M
    Width 30.48M

Comments on the geologic information

  • DEPOSIT OCCURS IN AN ELONGATE ULTRAMAFIC MASS EXPOSED IN WESTERN METAMORPHIC BELT OF SIERRA NEVADA FOOTHILLS. A THICK MANTLE OF SLOPE WASH AND HEAVY VEGETATION COVERS MUCH OF THE GEOLOGY.

Economic information about the deposit and operations

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

Mining district

District name Flagstaff Hill Area

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Surface Rigts: A. B. Dobbas, Auburn, Ca; Mineral Rigts: M. L. Harr Et. Al., Sacramento, Ca.

Production statistics

  • Year 1918
    Period 1914-1918
    Material ORE
    Accuracy Estimate
    Description Cp_Grade: ^Average Ore 10-15% Cr2o3, 15-20% Fe.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Ore Iron Iron 18wt-pct
    Major Cr2O3 Chromium Chromium 13wt-pct

Comments on the workings information

  • WORKINGS (1918) CONSISTED OF 4 ADITS RANGING IN DEPTH FROM 50 TO 185 FT. NUMEROUS SMALL OPEN CUTS AND PITS ARE SCATTERED OVER THE AREA.

Reference information

Bibliographic references

  • Deposit

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

  • Deposit

    CDMG BULL 134, PT. 3, CHAPT. 4, PP. 148-150

  • Production

    STINSON, 1976, CDMG UNPUBLISHED REPORT

General comments

Subject category Comment text
Deposit INVERSE NODULAR ORE, CONSISTING OF NONULES OF BARREN DUNITE CONTAINED IN A MATRIX OF NEARLY PURE DISSEMINATED CHROMITE, IS PRESENT IN THIS DEPOSIT. THE CHROMITE DEPOSITS ARE DISCONTINUOUS ALONG THE ABOVE AVERAGE STRIKE.

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.