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  3. Mineral Resource Data System (MRDS)

Fort Seward Mine

Past Producer in Humboldt county in California, United States with commodities Manganese, Silica
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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. 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 10212168
MRDS ID W017570
MAS/MILS ID 0060230006
Record type Site
Current site name Fort Seward Mine
Alternate or previous names Woods Mine
Related records 10072346

Geographic coordinates

Point of reference Trench
Geographic coordinates: -123.70552, 40.20455 (WGS84)
Elevation 881
Location accuracy 100(meters)

Site location context

Political divisions (FIPS codes)

Humboldt(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Fort Seward(quadrangle 1:24,000 scale)

Garberville(quadrangle 1:100,000 scale)

Redding(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Eel(hydrologic unit)

Northern California Coastal(hydrologic accounting unit)

Klamath-Northern California Coastal(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Humboldt

Public Land Survey System information

Meridian Township Range Section Fraction State
Humboldt 003 S 004 E 14 NWNWSW California

Commodities

Commodity Importance
Manganese Critical Tertiary
Silica Tertiary

Materials information

Materials Type of material
Chert Unknown
Hematite Unknown
Psilomelane Unknown
Quartz Unknown
Rhodochrosite Unknown

Nearby scientific data

Trench (1) -123.70552, 40.20455
ListMap

Economic information

Ore body information

  • Strike N55W
    Dip 85N
    Thickness 4M
    Length 97M
    Width 13M
    Depth to top 3M
    Field Value
    MAS Matrix # 1
    Type of Orebody #1 SEDIMENTARY
    Shape of Orebody #1 LENTICULAR
    Type of Orebody #2 SHEAR ZONE
    Shape of Orebody #2 IRREGULAR
    Shape of Orebody #3 PIPELIKE
    Primary mode of Origin SEDIMENTATION
    Secondary mode of Origin OXIDATION
    Primary Ore Control LITHOLOGY
    Secondary Ore Control BEDDING
    Degree of Wallrock Alter. NONE
    Strike And Dip N55W:85N
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 3
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830316
  • Area 2HA
    Field Value
    Total Surface Area (HA) 2
    Date of Last Modification 910418

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1917
Year of first production 1918

Mineral rights holdings

Type of mineral rights Fee Ownership

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Fort Seward Ranch
    Interest 100
    Home office California
    Year 1975
  • Type Operator
    Owner Glen Adkinson
    Home office California
    Year 1975

Comments on the reserve resource information

  • RESOURCE FIGURES WERE REVISED BASED ON THE EXAMINATION REPORT.

Reference information

Bibliographic references

  • Deposit

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

  • Deposit

    TRENGOVE-RECON OF CAL MN DEPS-USBM RPT OF INVEST 5579-1960

  • Deposit

    JENKINS-MN IN CALIF-CAL DIV OF MINES BUL 125-DEC 1943

  • Deposit

    DAVIS & WOODFORD-UNPUB RPT CAL STATE COUNCIL FOR DEFENSE-191

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.