1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Copperopolis Area

Occurrence in Calaveras county in California, United States with commodities Nickel, Cobalt
Map
XML
JSON
KML
C
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. Ownership information
  13. Links to other databases
  14. Bibliographic references
  15. Reporter information

Geologic information

Identification information

Deposit ID 10033761
MRDS ID M020406
Record type Site
Current site name Copperopolis Area

Geographic coordinates

Geographic coordinates: -120.55183, 37.93547 (WGS84)
Relative position 10 MI. BY PAVED ROAD FROM COPPEROPOLIS, IN THE S.E. PART OF BOWIE FLAT, IN ROLLING HILLS WHOSE HIGHEST ELEVATION IS 1220 FT, WITH RELIEF FROM 200 TO 750 FT.

Site location context

Political divisions (FIPS codes)

Calaveras(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 Calaveras

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 001N 013E 16 California

Comments on the location information

  • LOCATED IN 5 1/2 SECTION 16

Commodities

Commodity Importance
Nickel Critical Tertiary
Cobalt Critical Tertiary

Materials information

Materials Type of material
Chrysoprase Ore
Garnierite Ore

Analytical data

Result SAMPLES ASSAYED BETWEEN 0.14 AND 9.42 PERCENT NICKEL OXIDE, WITH THE AVERAGE OF 1.0 PERCENT. AVERAGE 0.006 PERCENT COBALT

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Serpentinite
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -120.55183, 37.93547
ListMap

Economic information

Ore body information

  • Thickness 24.38M

Comments on the geologic information

  • GEOL.DESC: 320 ACRES OF NICKEL-BEARING LATERITES ARE ON TOP OF SERPENTINES. THIS MANTLE OF LATERITE CONSISTS OF SILICIFIED ZONE, WHICH IS S. EXTENSION OF SERPENTINE BELT OF VALLEY SPRINGS AREA, AND WHICH OCCURS AS ONLY SMALL REMNANTS OF PRESERVED MANTLE. GARNIERITE AND CHRYSOPRASE ARE THE COMMON NICKEL-BEARING LATERITES ON TOP OF SERPENTINES, AND OCCUR AS VEINS. THE BASE OF MANTLE IS AVERAGE ELEVATION OF 1150 FT. THE LATERITE IS 20 TO 80 FT. THICK, AVERAGING 30 FT. THICK. AREA IS UNDERLAIN PRINCIPALLY BY METAVOLCANIC ROCKS OF LOGTOWN RIDGE FORMATION (JURASSIC), AND SERPENTINITE, WITH SMALL ISOLATED PATCHES OF TABLE MOUNTAIN LATITE (PLIOCENE)

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No
Discovery year 1954

Ownership information

  • Type Owner
    Owner Open Land

Reference information

Bibliographic references

  • Deposit

    CLEVELAND, G., 1954 ( 1974 ), PRIVATE COMMUNICATION

  • Deposit

    CLARK, W.B. AND P.A. LYDON, 1962 , CALIF. DIV. OF MINES AND GEOL., COUNTY REPT. 2

  • Deposit

    CHESTERMAN, C.W., 1976 , WRITTEN COMMUNICATION

  • Deposit

    TALIAFERRO, N.L. AND A.J. SOLARI, 1948 , GEOLOGIC MAP OF THE COPPEROPOLIS QUAD, CALIF: CALIF. D.O.M.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAR-1978 Killman, K.; 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.