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Walker 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. Reserves and resources
  18. Links to other databases
  19. Bibliographic references
  20. Reporter information

Geologic information

Identification information

Deposit ID 10043726
MRDS ID M100639
Record type Site
Current site name Walker Mine

Geographic coordinates

Geographic coordinates: -121.10492, 38.68768 (WGS84)
Elevation 290
Relative position 1.5 MI N OF HIGHWAY 50 AND CLARKSVILLE.

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Clarksville(quadrangle 1:24,000 scale)

Sacramento(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower 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 010N 008E 35 SW California

Comments on the location information

  • JUST NORTH OF JOERGER MINE (M100634)

Commodities

Commodity Importance
Chromium Critical Primary
Iron Secondary

Materials information

Materials Type of material
Chromite Ore

Alteration

  • (Local) Serpentinization

Analytical data

Result AVERAGE ORE 15% CR2O3, 15-17% FEO

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) -121.10492, 38.68768
ListMap

Economic information

Ore body information

  • Strike N 35 W
    Dip 65 E
    Length 30.48M
    Width 1.22M

Comments on the geologic information

  • DEPOSIT OCCURS NEAR EASTERN EDGE OF ULTRAMAFIC LINEAR MASS EXPOSED IN WESTERN METAMORPHIC BELT OF SIERRA NEVADA FOOTHILLS.

Economic information about the deposit and operations

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

Mining district

District name Clarksville Area

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner John Hancock Mutual Life Insurance Co.
    Home office Boston, Mass
  • Type Owner
    Owner Bankers Title Guaranty Co. (Mineral Rights)
    Home office Sacramento, Ca.

Production statistics

  • Year 1917
    Material ORE
    Accuracy Estimate
    Description Ap_Grade: ^13-15% Cr2o3
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Chromium Chromium 14wt-pct

Comments on the production information

  • VOIO MINING CO LEASED PROPERTY FROM F.E. WALKER IN 1942, BUT NO RECORD OF PRODUCTION WAS FOUND.

Reserves and resources

  • Type In-situ
    Estimate year 1951
    Commodity Subtype Grade units Group Importance Year
    Chromium Cr2O3 10 wt-pct Chromium Major 1951

Comments on the workings information

  • WORKINGS CONSISTED OF A 60 FT SHAFT WITH 30 FT DRIFTS ON THE 60 FT LEVEL AND NUMOROUS OPEN PITS.

Reference information

Bibliographic references

  • Deposit

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

  • Deposit

    CDMG BULL 134, PT. 3, CHAPT. 4, PP. 126-128

  • Production

    STINSON, 1976, CDMG UNPUBLISHED REPORT

  • Reserve-Resource

    STINSON, 1976, CDMG UNPUBLISHED REPORT.

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.