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  3. Mineral Resource Data System (MRDS)

Pillikin Mine Area 5

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. 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. Reserves and resources
  16. Links to other databases
  17. Bibliographic references
  18. Reporter information

Geologic information

Identification information

Deposit ID 10043682
MRDS ID M100581
Record type Site
Current site name Pillikin Mine Area 5
Alternate or previous names Placer Chrome Co. Workings

Geographic coordinates

Geographic coordinates: -121.08964, 38.79406 (WGS84)
Relative position APPROX. 5.5 AIRLINE MI SW OF PILOT HILL

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)

North 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 008E 21 California

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore
Chlorite Gangue
Epidote Gangue

Alteration

  • (Local) Serpentinization, Silicification

Host and associated rocks

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

Nearby scientific data

(1) -121.08964, 38.79406
ListMap

Economic information

Ore body information

  • General form LENSES, PODS
    Thickness 30.48M
    Length 304.8M
    Width 304.8M

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

Reserves and resources

  • Type In-situ
    Estimate year 1940
    Total resources 113000mt ore
    Commodity Subtype Grade units Group Importance Year
    Chromium Cr2O3 4 wt-pct Chromium Major 1940

Comments on the workings information

  • WORKINGS CONSIST OF A NUMBER OF GLORY HOLES, SHAFTS AND PITS SCATTERED FOR A DISTANCE OF APPROX. 1000 FT ALONG FLANKS AND CREST OF NORTH-TRENDING RIDGE.

Reference information

Bibliographic references

  • Deposit

    CDMG BULL 134, P. 142

  • Deposit

    USGS BULL 922-0, P. 452-453

  • Reserve-Resource

    USGS BULL 922-0, P. 453

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.