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Williams Prospect

Occurrence in El Dorado county in California, United States with commodity Tungsten
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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. Nearby scientific data
  8. Economic information about the deposit and operations
  9. Ownership information
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10030131
MRDS ID M008067
Record type Site
Current site name Williams Prospect

Geographic coordinates

Geographic coordinates: -120.71185, 38.66129 (WGS84)
Relative position NW1/4. LOCATED 7 MILES SE OF PLACERVILLE AND 1 MILE NE OF BUCK'S BAR.

Site location context

Political divisions (FIPS codes)

El Dorado(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Camino(quadrangle 1:24,000 scale)

Placerville(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Cosumnes(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(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 009N 011E 01 California

Commodities

Commodity Importance
Tungsten Critical Primary

Nearby scientific data

(1) -120.71185, 38.66129
ListMap

Economic information

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No
Discovery year 1954

Ownership information

  • Type Operator
    Owner F. T. Lee And J. Needham

Comments on the production information

  • IN 1956 SEVERAL TONS OF ORE WERE MINED FOR MILLING TESTS. A NUMBER OF ANALYSIS SHOW THAT PARTS OF THE DEPOSIT CONTAIN FROM 1 TO 2 PERCENT WO3.

Comments on the workings information

  • IN EARLY 1956, AN OPEN CUT 20 FT. LONG, 20 FT. WIDE AND 15 FT. HIGH ON S. SLOPE OF A RIDGE.

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 52, NO. 4, PP. 440, 578, PL. 10

General comments

Subject category Comment text
Deposit THE TACTITE PINCHES OUT NEAR THE SURFACE AND WIDENS AT DEPTH; THE GREATEST WIDTH OF EXPOSED TACTITE IS ABOUT 12 FT. THE SCHEELITE IS IN THIN PARALLEL STREAKS NEAR THE CENTER OF THE TACTITE BODY. COUNTRY ROCK IS QUARTZITE AND MICA SCHIST OF THE CALAVERAS GROUP.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1972 Gere, W. 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.