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Dyer Prospect

Occurrence in Alameda 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. Materials information
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Ownership information
  11. Links to other databases
  12. Bibliographic references
  13. Reporter information

Geologic information

Identification information

Deposit ID 10027960
MRDS ID M004651
Record type Site
Current site name Dyer Prospect
Related records 10260085

Geographic coordinates

Geographic coordinates: -121.66853, 37.7588 (WGS84)
Relative position ON THE DYER ESTATE

Site location context

Political divisions (FIPS codes)

Alameda(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Byron Hot Springs(quadrangle 1:24,000 scale)

Stockton(quadrangle 1:100,000 scale)

San Jose(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

San Francisco Bay(hydrologic unit)

San Francisco Bay(hydrologic accounting unit)

San Francisco Bay(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Alameda

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 002S 003E 17 California

Commodities

Commodity Importance
Manganese Critical Tertiary

Materials information

Materials Type of material
Psilomelane Ore
Pyrolusite Gangue

Analytical data

Result PEBBLES ARE 30 TO 35 % MANGANESE

Nearby scientific data

(1) -121.66853, 37.7588
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: IRREGULAR PEBBLES OF HARD MANGANESE OXIDE OCCUR IN SOIL IN A ROUGHLY LINEAR BELT, WHICH IS 1/2 MILE LONG, 100 FT. WIDE, AND DIPS GENTLY E. PEBBLES ARE IRREGULAR IN SHAPE, AVE. 1 1/2 IN. DIAMETER, AND CONSIST OF INTERLACING VEINS OF PSILOMELANE IN A SOFT RUSTY-COLORED LIMY MATRIX.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Ownership information

  • Type Owner
    Owner Dyer (Estate)

Comments on the production information

  • NO PRODUCTION. IT IS DOUBTFUL IF MORE THAN 5 TONS OF ORE AVERAGING 30-35 PERCENT MANGANESE CAN BE FOUND ON THE PROPERTY. THE PROSPECT IS 1 MILE FROM ALTAMONT, ON THE WESTERN PACIFIC RR. THE SURFACE OF THE ORE CONSISTS OF TINY RADIATING NEEDLES OF WELL CRYSTALLIZED PYROLUSITE. HALF A MILE E OF THE MAIN OCCURENCE OF THE PEBBLES IS A BED OF LIMESTONE AND SHALY LIMESTONE CONGLOMERATE AMONG THE PEBBLES OF WHICH ARE A FEW PEBBLES OF WHITE CHERT AND MANGANESE OXIDE AND MAY BE THE SOURCE OF THE PEBBLES FARTHER WEST. MANNER OF OCCURRENCE INDICATES THE PROSPECT HAS LITTLE ECONOMIC VALUE.

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 46, NO. 2, P. 344, PL. 58

  • Deposit

    DOM BULL. 125, P.98

  • Deposit

    BULL. 152, P.20

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.