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  3. Mineral Resource Data System (MRDS)

White Rock

Past Producer in Mariposa county in California, United States with commodities Copper, Gold, Silver
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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. Ore body information
  9. Controls for ore emplacement
  10. Economic information about the deposit and operations
  11. Ownership information
  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 10031055
MRDS ID M009627
Record type Site
Current site name White Rock
Alternate or previous names Copper King, White Knob
Related records 10163546

Geographic coordinates

Geographic coordinates: -120.08459, 37.33076 (WGS84)
Relative position 1/4 MILE SOUTH OF WHITE ROCK SILICA MINE

Site location context

Political divisions (FIPS codes)

Mariposa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Illinois Hill(quadrangle 1:24,000 scale)

Merced(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Fresno River(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Mariposa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 007S 017E 14 California

Commodities

Commodity Importance
Copper Primary
Gold Secondary
Silver Secondary

Nearby scientific data

(1) -120.08459, 37.33076
ListMap

Economic information

Ore body information

  • Width 7.62M

Controls for ore emplacement

  • Shear Zone

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Production years 1916

Ownership information

  • Type Operator
    Owner James Helm
    First year 1943

Comments on the production information

  • SEVERAL CARLOADS OF ORE WHERE SHIPPED 1900 - 1902 , YIELDED 35 % CU, ONE CARLOAD RAN 40 % CU. OXIDIZED ORE CARRIED $1.50 - $2.50 AU/TON (OLD PRICE OF AU) AND 3 1/2 OZ/TON AG

Workings at the site

  • Type of workings Underground
    Overall depth 45.72M

Comments on the workings information

  • PRINCIPAL WORKING: 150 FT. SHAFT WITH 175 FT. OF DRIFTS. NUMEROUS MINOR WORKINGS

Reference information

Bibliographic references

  • Deposit

    AUBURY, L. E., 1908 , COPPER RESOURCES OF CALIFORNIA BULL. 50 ; CALIF. MIN. BUR., P. 262 - 264 .

  • Deposit

    BOWEN, O. E. AND CLIFFTON, G. H., 1957 , MINES AND MINERAL RESOURCES OF MARIPOSA COUNTY, CALIFORNIA; CALIF. JOUR. MINES AND GEOLOGY, VOL. 53 , NO. 1 & 2 , P. 231 .

  • Production

    BOWEN AND CLIFFTON, 1957 , P. 231 (SEE REF.)

General comments

Subject category Comment text
Deposit OXIDE AND CARBONATE ORE REACHES DEPTH OF 100 FT., SULFIDES BELOW THAT DEPTH.
Deposit REPORTED TO BE A PATENTED MINE BUT NOT ON COUNTY ASSESSOR'S LIST IN 1954.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey
Updater 01-JUL-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.

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.