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Sam Brown World War No. 2 Prospect

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

Geologic information

Identification information

Deposit ID 10030561
MRDS ID M008757
Record type Site
Current site name Sam Brown World War No. 2 Prospect
Related records 10163179

Geographic coordinates

Geographic coordinates: -123.71003, 41.07872 (WGS84)
Relative position ON NORTH FLANK OF SCOTTISH POINT

Site location context

Political divisions (FIPS codes)

Humboldt(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Hoopa(quadrangle 1:24,000 scale)

Hoopa(quadrangle 1:100,000 scale)

Weed(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Trinity(hydrologic unit)

Klamath(hydrologic accounting unit)

Klamath-Northern California Coastal(hydrologic subregion)

California(hydrologic region)

Federal lands

BIA(Federal land areas administered by BIA)

Geographic areas

Country State County
United States California Humboldt

Public Land Survey System information

Meridian Township Range Section Fraction State
Humboldt 008N 004E 15 California

Comments on the location information

  • UTM APPROX

Commodities

Commodity Importance
Manganese Critical Tertiary

Materials information

Materials Type of material
Rhodonite Ore
Copper Gangue
Malachite Gangue
Pyrite Gangue

Analytical data

Result ORE GRADE 10 TO 35 PERCENT MANGANESE

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro
  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Quartzite

Nearby scientific data

(1) -123.71003, 41.07872
ListMap

Economic information

Ore body information

  • Thickness 1.83M
    Length 12.19M

Comments on the geologic information

  • GEOL.DESC: RHODONITE ORE INTERBEDDED WITH QUARTZITE, AND A COARSE GRAINED GABBRO CROPS OUT TO THE EAST OF THE ORE BODY WITH AN INTRUSIVE OR FAULT CONTACT. LOWER EXPOSURE OF ORE MAY BE FLOAT OR CONTINUATION OF UPPER BED. SMALL AMOUNTS OF PYRITE, NATIVE COPPER, MALACHITE (?) AND SOME SILICEOUS BROWN ORE ARE PRESENT.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Comments on the production information

  • IT IS ESTIMATED THAT THERE ARE 250 TONS OF ORE IN ONE OUTCROP AND IF THE TWO EXPOSURES ARE PARTS OF THE SAME OREBODY, A MUCH LARGER TONNAGE IS AVAILABLE. A SMALL AMOUNT OF OXIDE ORE IS ALSO PRESENT BUT PROBABLY DOES NOT EXCEED MORE THAN ONE TON, AVERAGING 40 PERCENT MANGANESE.

Comments on the workings information

  • NO DEVELOPMENT.

Reference information

Bibliographic references

  • Deposit

    DOM BULL. 152, 1950, PP. 71-72

  • Deposit

    USBM R.I. 5579, P. 6

  • Deposit

    PSFC REPT. FIG. 7,CALIF. DIV. MINES BULL. 179, FIG. 13.: ADD. REF.: USGS MR-23

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey
Updater 01-DEC-1977 Killman, K.; 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.