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  3. Mineral Resource Data System (MRDS)

Experimental

Past Producer in Tuolumne county in California, United States with commodities Gold, Silver, Copper, Lead
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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 10077907
MRDS ID W025982
Record type Site
Current site name Experimental
Related records 10262801

Geographic coordinates

Geographic coordinates: -120.38961, 38.06297 (WGS84)
Elevation 610
Relative position ABOUT 1 1/2 MILE N.E. OF COLUMBIA, IN EXPERIMENTAL GULCH, ON THE N. FORK OF THE STANISLAUS RIVER.

Site location context

Political divisions (FIPS codes)

Tuolumne(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Columbia(quadrangle 1:24,000 scale)

San Andreas(quadrangle 1:100,000 scale)

Sacramento(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 002N 014E 01 California

Commodities

Commodity Importance
Gold Primary
Silver Secondary
Copper Tertiary
Lead Tertiary

Comments on the commodity information

  • GOLD WAS COARSE, CONTAINING SULFIDES

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Gold Ore
Pyrite Ore

Analytical data

Result CONCENTRATES ASSAYED $100 PER TON.

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) -120.38961, 38.06297
ListMap

Economic information

Ore body information

  • Strike N 20 W
    Dip 40 NE
    Depth to top 1.83M

Comments on the geologic information

  • GEOL.DESC: TRUE FISSURE VEIN WITH AVERAGE THICKNESS OF 5 FT. HANGING WALL IS A HARD DOLOMITIC LIMESTONE WITH CAVERNS CONTAINING WATER AND MUD; THE FOOTWALL IS LIMESTONE CUT BY A SERIES OF DIORITE DIKES STRIKING ACROSS THE VEIN. ORE SHOOTS FORMED AT INTERSECTION OF DIKES AND THE VEIN.

Economic information about the deposit and operations

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

Comments on the production information

  • SEVERAL THOUSAND TONS OF ORE REMOVED SINCE 1928 , PRINCIPALLY BETWEEN 1936 AND 1940 ESTIMATED AT SEVERAL HUNDRED THOUSAND DOLLARS

Workings at the site

  • Type of workings Underground
    Area 10.118HA

Comments on the workings information

  • INCLINED SHAFT 600 FT. WITH CROSSCUT ADIT OVER 3000 FT. AND DRIFT 525 FT.; WINZES AT BASE OF SHAFT 300 FT. APART.

Reference information

Bibliographic references

  • Deposit

    LOGAN, C.A., 1949 , MINES AND MIN. RES. OF TUOLUMNE COUNTY: CDM REPT. 45 , P. 65

  • Deposit

    TUCKER, W.B., 1914 , TUOLUMNE COUNTY: CMB REPT. 14 , P. 148

General comments

Subject category Comment text
Deposit MINE INITIALLY DEVELOPED 1854 AND WORKED INTERMITTANTLY

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1978 Albers, J.; Tatkin, T. 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.