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Buckhorn

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. Host and associated rocks
  8. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Ownership information
  12. Links to other databases
  13. Bibliographic references
  14. Reporter information

Geologic information

Identification information

Deposit ID 10095038
MRDS ID M004694
Record type Site
Current site name Buckhorn
Related records 10162763

Geographic coordinates

Geographic coordinates: -121.57408, 37.53685 (WGS84)
Elevation 823

Site location context

Political divisions (FIPS codes)

Alameda(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Cedar Mountain(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 004S 004E 31 California

Comments on the location information

  • LOCATED IN SW 1/4 SE 1/4 SECTION 31

Commodities

Commodity Importance
Manganese Critical Tertiary

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Chert
    Stratigraphic age (youngest) Late Cretaceous

Nearby scientific data

(1) -121.57408, 37.53685
ListMap

Economic information

Ore body information

  • Strike N 35 W
    Dip 30 W
    Thickness 1.52M

Comments on the geologic information

  • GEOL.DESC: THREE LOCATIONS INDICATING MASSIVE CHERT WITH MANGANESE OXIDE STAINS; LYING WITHIN THIN BEDDED GREEN CHERTS AND SHALE. IN SOME PLACES THE BEDS ARE ALTERED TO SILICEOUS OXIDE ORE.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Ownership information

  • Type Owner
    Owner Oakland Area Council, Boy Scouts Of America
    First year 1950

Comments on the production information

  • NO RECORD OF ANY PRODUCTION. THE GRADE OF THE ORE EXPOSED IN THE LARGER OPEN CUT IS ESTIMATED TO BE 15 PERCENT MANGANESE. NO ORE WAS SEEN ON THE DUMP IN 1943. THE INCLINE WAS DRIVEN ALONG A 5 FT. LAYER OF MASSIVE CHERT WHICH LIES PARALLEL TO THE ENCLOSING GREEN CHERT AND SHALE, STRIKE OF THE BEDS N. 35 DEG. W. DIP 30 DEG. W. THE SMALL OPEN CUT EXPOSES A 3-FT. LAYER OF MASSIVE CHERT WITH MANGANESE STAINS; THE LARGE CUT EXPOSES BED OF SILICEOUS ORE 1.5 FT. THICK, 10 FT. LONG, STRIKE N. 70 DEG. W. AND DIP 50 DEG. S

Comments on the workings information

  • THREE WORKINGS, A 30 FT. INCLINE, A SMALL OPEN CUT AND A LARGER OPEN CUT

Reference information

Bibliographic references

  • Deposit

    CALIF. JOUR. MINES & GEOL. V. 46, NO. 2, APRIL 1950, P.343, PL. 58

  • Deposit

    DOM BULL. 125, P.97

  • Deposit

    BULL. 152, P.16

  • Deposit

    BULL. 140 , PL. 1 (GEOLOGY)

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.