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

Dewhirst Mine

Past Producer in Alameda county in California, United States with commodities Manganese, Silica
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. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Mineral rights holdings
  12. Land status
  13. Ownership information
  14. Links to other databases
  15. Bibliographic references
  16. Reporter information

Geologic information

Identification information

Deposit ID 10186918
MRDS ID M004668
MAS/MILS ID 0060010009
Record type Site
Current site name Dewhirst Mine
Related records 10109081

Geographic coordinates

Point of reference Trench
Geographic coordinates: -121.62133, 37.56911 (WGS84)
Elevation 990
Location accuracy 500(meters)

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 004 S 003 E 22 SWNESE California

Commodities

Commodity Importance
Manganese Critical Tertiary
Silica Tertiary

Materials information

Materials Type of material
Chert Unknown
Glaucophane Unknown
Limonite Unknown
Psilomelane Unknown
Quartz Unknown

Nearby scientific data

Trench (1) -121.62133, 37.56911
ListMap

Economic information

Ore body information

  • Strike E00W
    Dip 50S
    Thickness 2M
    Length 8M
    Width 5M
    Depth to top 1M
    Field Value
    MAS Matrix # 1
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 LENTICULAR
    Type of Orebody #2 DISSEMINATED
    Shape of Orebody #2 MASSIVE
    Primary mode of Origin OXIDATION
    Secondary mode of Origin RESIDUAL CONCENT
    Primary Ore Control LITHOLOGY
    Secondary Ore Control BEDDING
    Degree of Wallrock Alter. NONE
    Strike And Dip E00W:50S
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 1
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Area 1HA
    Field Value
    Total Surface Area (HA) 1
    Date of Last Modification 910418

Economic information about the deposit and operations

Operation type Surface
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Year of first production 1915

Mineral rights holdings

Type of mineral rights Fee Ownership

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Prindle,V. A. And H. R.,
    Interest 100
    Home office 1229 Holman Rd.,Oakland,Ca. 94610
    Year 1975

Reference information

Bibliographic references

  • Deposit

    TRASK-GEO.DESCRIPT.MN.DEPS.OF CAL-CAL DIV OF MINES,BUL#152-A

  • Deposit

    DOM BULL 125 P98

Reporter information

Type Date Name Affiliation Comment
Reporter 27-FEB-1984 Niemi U.S. Bureau of Mines

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.