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Fort Baker

Producer in Humboldt county in California, United States with commodities Manganese, Chromium
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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. Host and associated rocks
  9. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Land status
  12. Ownership information
  13. Links to other databases
  14. Bibliographic references
  15. Reporter information

Geologic information

Identification information

Deposit ID 10030553
MRDS ID M008744
Record type Site
Current site name Fort Baker
Alternate or previous names Porter Ranch
Related records 10285398

Geographic coordinates

Geographic coordinates: -123.7578, 40.59428 (WGS84)
Relative position E. SIDE OF INDIAN CREEK

Site location context

Political divisions (FIPS codes)

Humboldt(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Yager Junction(quadrangle 1:24,000 scale)

Hayfork(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 003N 004E 32 California

Comments on the location information

  • LOCATED IN NW 1/4 SW 1/4 SECTION 32 , MINE SYMBOL

Commodities

Commodity Importance
Manganese Critical Primary
Chromium Critical Tertiary

Materials information

Materials Type of material
Psilomelane Ore

Analytical data

Result ORE GRADE OVER 30 PERCENT MANGANESE

Host and associated rocks

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

Nearby scientific data

(1) -123.7578, 40.59428
ListMap

Economic information

Comments on the geologic information

  • ORE HOSTED IN FRANCISCAN COMPLEX--L. TO L. ; GEOL.DESC: CHERT BODY FOLDED INTO AN ANTICLINE PITCHING GENTLY NE AND FAULTED ALONG SE LIMB. A BRECCIATED ZONE ASSOCIATED WITH THE FAULT CONTAINED THE MAIN ORE BODIES. HIGH GRADE ORE IS PSILOMELANE OCCURING AS THIN SEEMS IN RED SHALE OF THE BRECCIATED ZONE.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Medium
Significant No

Land status

Ownership category National Forest

Ownership information

  • Type Operator
    Owner Russ Inv. Co. (L. V. Smith, Secretary)

Comments on the production information

  • IN 1918, 473 TONS OF ORE AVERAGING 47 PERCENT MANGANESE AND 13 PERCENT SILICA, WAS SHIPPED. MINE WAS WORKED UNTIL 1920 WHEN IT WAS ABANDONED WITH TOTAL PRODUCTION OF 654TONS. LITTLE ORE IN SIGHT IN 1942 BUT CHANCES OF FINDING ADDITIONAL HIGH-GRADE ORE ARE FAVORABLE. TOTAL PRODUCTION TO 1958 WAS MORE THAN 2000 TONS 45.2 -50.6% MN.

Comments on the workings information

  • OPEN CUTS, SHALLOW SHAFTS AND TUNNELS.

Reference information

Bibliographic references

  • Deposit

    CDM BULL. 134, PT. 1, PL. 19

  • Deposit

    D.O.M. BULL. 152, 1950, PP. 65-67

  • Deposit

    CALIF. JOUR. MINES & GEOLOGY, V.37, NO. 4, OCT. 1941, PP. 518-19; ADD. REF.: USBM RI 5579, P. 7; PSFC FIG. 7, CALIF. DIV. MINES BULL. 179, FIG. 13; MR-23

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 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.