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  3. Mineral Resource Data System (MRDS)

Ohio Diggings

Past Producer in Tuolumne county in California, United States with commodity Copper
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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. Ore body information
  11. Economic information about the deposit and operations
  12. Workings at the site
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10077898
MRDS ID W025972
Record type Site
Current site name Ohio Diggings
Alternate or previous names Mackey Ranch
Related records 10166104

Geographic coordinates

Geographic coordinates: -120.44128, 37.91853 (WGS84)
Elevation 396
Relative position ( SW 1/4 OF SEC. 21 ), 2 1/2 MILES SOUTH OF JAMESTOWN

Site location context

Political divisions (FIPS codes)

Tuolumne(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sonora(quadrangle 1:24,000 scale)

Oakdale(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Tuolumne(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 001N 014E 21,28 California

Commodities

Commodity Importance
Copper Primary

Materials information

Materials Type of material
Chalcopyrite Ore

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) -120.44128, 37.91853
ListMap

Economic information

Ore body information

  • General form LENTICULAR
    Thickness 3.05M

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years 1915

Comments on the production information

  • 1915 ; 12 TONS WERE SHIPPED FROM A VEIN ONE FT. WIDE, IT ASSAYED 9 % CU, AND $2.50/TON IN AU AND AG.

Workings at the site

  • Type of workings Underground
    Overall depth 38.1M

Comments on the workings information

  • ONE SHAFT

Reference information

Bibliographic references

  • Deposit

    LOGAN, C. A., 1928 , SACRAMENTO FIELD DIVISION, 24TH REPT. STATE MINERALOGIST; CALIF. MIN. BUR., P. 7

  • Deposit

    TUCKER, W. B., 1914 , TUOLUMNE COUNTY, 14TH REPT. STATE MINERALOGIST; CALIF. MIN. BUR., P. 135

  • Production

    LOGAN, C. A., 1928 , P. 7 (SEE REF.)

General comments

Subject category Comment text
Deposit OXIDES AND SULFIDES OF COPPER

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1978 Fraticelli, L. A. (Albers, J.) 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.