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Mccormick Mine

Past Producer in Tuolumne 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. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10103914
MRDS ID M100608
Record type Site
Current site name Mccormick Mine
Alternate or previous names Terry and Sell Lease Wwi

Geographic coordinates

Geographic coordinates: -120.50961, 37.87992 (WGS84)
Elevation 309
Relative position APPROX. 10 MILES SW OF SONORA, CA.

Site location context

Political divisions (FIPS codes)

Tuolumne(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

New Melones Dam(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Stanislaus(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Tuolumne

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001S 013E 02 California

Comments on the location information

  • 1:24000 QUADRANGLE MAP IS A 1962 EDITION

Commodities

Commodity Importance
Chromium Critical Primary

Materials information

Materials Type of material
Chromite Ore

Analytical data

Result ORE AVERAGED 43-49% CR2O3 AND CR TO FE RATIO 2.8-3.5 TO 1.

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite > Diabase
    Rock unit name Logtown
    Rock description Logtown
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Late Permian
    Stratigraphic age (youngest) Late Jurassic
    Stratigraphic age (youngest) Late Cretaceous
  • Host or associated Host
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Peridotite > Dunite
    Rock unit name Calaveras
    Rock description Calaveras

Nearby scientific data

(1) -120.50961, 37.87992
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Nw Trending Bear Mountain Fault

Ore body information

  • General form LENSE
    Strike N 30-45 W
    Dip NE

Comments on the geologic information

  • THE DEPOSIT OCCURS IN THE NORTHERN PART OF THE WESTERNMOST OF TWO SERPENTINE BELTS THAT TREND NW-SE ACROSS THE COUNTY. THE BELT IS EXPOSED OVER AN AREA 30KM BY 6KM.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1875
Year of first production 1875
Year of last production 1957

Mining district

District name Chinese Camp Area

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Hemming, A. E. And A. M. (North Deposit)
  • Type Operator
    Owner Williamson, W. R. (South Deposit)
  • Type Owner
    Owner Martin, Joseph W.
    Home office Route 6, Box 116, Sonora, Ca 95370

Production statistics

  • Year 1944
    Period 1942-1944
    Material ORE
    Accuracy Accurate
    Description Cp_Grade: ^43-49% Cr2o3, North And South Deposits
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Cr2O3 Ore Chromium Chromium 46wt-pct

Comments on the production information

  • THE 1950'S PRODUCTION PROBABLY CAME FROM REWORKING OF THE MINE DUMPS.

Comments on the reserve resource information

  • STINSON, 1975, CDMG MINERAL PROPERTY REPORT, UNPUBLISHED

Comments on the workings information

  • WORKINGS OF THE SOUTHERN DEPOSIT CONSISTED OF 3 SHAFTS, 34-220 FT DEEP, AND OVER 700 FT OF DRIFTS, CROSSCUTS, RAISES AND WINZES. WORKINGS OF THE NORTHERN DEPOSIT CONSISTED OF SHAFTS AND DRIFTS, NOW CAVED (1944).

Reference information

Bibliographic references

  • Deposit

    STINSON, M.C., 1975, CDMG MINERAL PROPERTY REPORT, UNPUBLISHED.

  • Deposit

    CATER, F.W. JR., 1948, CDMG BULL 134, PART 3, CHAPT. 1, P. 21-23.

  • Production

    STINSON, 1975, CDMG MINERAL PROPERTY REPORT, UNPUBLISHED.

General comments

Subject category Comment text
Deposit THE DEPOSIT CONSISTED OF TWO MAIN ORE BODIES, NORTH AND SOUTH. BOTH HAD ABOUT THE SAME STRIKE AND DIP. THE SOUTHERN BODY WAS ORIGINALLY 165 FT LONG, HAD AN AVERAGE WIDTH OF 4 FT AND WAS HIGHLY FAULTED. THE NORTHERN BODY WAS MINED TO A DEPTH OF 100 FT AND HAD AN AVERAGE WIDTH OF 3-6 FT.
Deposit Discovery Year: 1870'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1982 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.

External references

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.