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Custer Dooley Prospect

Prospect in Amador county in California, United States with commodity Manganese
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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. Economic information about the deposit and operations
  10. Land status
  11. Ownership information
  12. Links to other databases
  13. Bibliographic references
  14. Reporter information

Geologic information

Identification information

Deposit ID 10028081
MRDS ID M004881
Record type Site
Current site name Custer Dooley Prospect

Geographic coordinates

Geographic coordinates: -120.87908, 38.34907 (WGS84)
Elevation 186
Relative position ABOUT 1/2 MILE NW OF THE DUFRENE PROSPECT, ALONG THE TRACKS OF THE AMADOR CENTRAL RAILROAD, 2250 FT. N OF WHERE THE RAILROAD CROSSES STATE HIGHWAY 88, 0.1 MILE WEST OF SUNNY BROOK SERVICE STATION AND 5 MILES WEST OF MARTELL. POSSIBLE PROSPECT IN NE 1/4 SW 1/4 1962 TOPO

Site location context

Political divisions (FIPS codes)

Amador(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Ione(quadrangle 1:24,000 scale)

San Andreas(quadrangle 1:100,000 scale)

Sacramento(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Mokelumne(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Amador

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 006N 010E 28 California

Commodities

Commodity Importance
Manganese Critical Tertiary

Nearby scientific data

(1) -120.87908, 38.34907
ListMap

Economic information

Ore body information

  • Strike N
    Dip 65 DEG E
    Thickness 1.83M
    Length 14.63M

Comments on the geologic information

  • GEOL.DESC: ORE LIES IN A BED OF MANGANIFEROUS METACHERT 5 TO 6 FT. THICK; STRIKING N - S AND DIPPING 65 DEG. E. THE METACHERT IS ENCLOSED IN METAVOLCANICS (IN PART GREENSTONE) AND META-TUFFS. THE META-CHERT IS MASSIVE TO BANDED, IN PART CHALCEDONIC TO OPALINE, IN PART RECRYSTALLIZED TO FIVE GRAINED QUARTZITE. THE TOTAL AMOUNT OF BLACK MANGANESE OXIDES EXPOSED IS SLIGHT; OCCURING AS BANDS AND CRUSTS IN THE META-CHERT.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Significant No

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner R. B. Custer
    Home office C/O R. J. Custer

Comments on the production information

  • NO MINABLE BODY OF MANGANESE OXIDE ORE IS IN SIGHT AT THIS PROPERTY

Comments on the workings information

  • SHAFT, 6' X 6', 20 FT. DEEP

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 50, NO. 1, JAN. 1954, P.268

  • Deposit

    DOM. BULL. 152, P.27-28

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1972 Gere, W. U.S. Geological Survey
Updater 01-APR-1977 Von Dohlen, E.; 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.