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Armstrong No. 2 Prospect

Occurrence in Trinity 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 10033666
MRDS ID M020294
Record type Site
Current site name Armstrong No. 2 Prospect
Related records 10216144

Geographic coordinates

Geographic coordinates: -123.30472, 40.18791 (WGS84)
Elevation 1067
Relative position ON THE S. SIDE OF MAD RIVER ABOUT 1.5 MI. S. OF DOUBLE A RANCH, ABOUT 70 MI. FROM RAILROAD AT CARLOTTA.

Site location context

Political divisions (FIPS codes)

Trinity(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Shannon Butte(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)

Federal lands

Six Rivers National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States California Trinity

Public Land Survey System information

Meridian Township Range Section Fraction State
Humboldt 003S 008E 20 California

Comments on the location information

  • LOCATED IN SW 1/4 SECTION 20

Commodities

Commodity Importance
Manganese Critical Primary

Materials information

Materials Type of material
Hausmannite Ore
Rhodochrosite Ore

Analytical data

Result AVERAGE GRADE ABOUT 40 PERCENT MANGANESE

Host and associated rocks

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

Economic information

Ore body information

  • Strike NW
    Dip 60 TO 80 N
    Thickness 0.91M

Comments on the geologic information

  • GEOL.DESC: ORE OCCURS IN RED AND WHITE CHERT BELT THAT STRIKES N. W. AND DIPS 60 TO 80 N. TWO ORE ZONES EACH ABOUT 3 FT. THICK ARE SEPARATED BY BARREN ZONE IN BELT OF MASSIVE CHERT 200 FT. THICK. ORE CAN BE TRACED ALONG STRIKE FOR 40 FT. ORE ON N. SIDE OF MINERALIZED ZONE IS RICHER, ABOUT 40 PERCENT MANGANESE. IT CONSISTS OF BLACK OXIDES AT SURFACE, TO RHODOCHROSITE, HAUSMANNITE AND BEMENTITE WITH DEPTH. S. PART OF ORE ZONE IS MAINLY MANGANIFEROUS CHERT OR NEOTOCITE, ABOUT 15 PERCENT MANGANESE. SOME STAINS OF GREEN COPPER MINERALS ARE PRESENT.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Reference information

Bibliographic references

  • Deposit

    D.O.M. BULL. 152 1950 PP. 302 - 303

  • Deposit

    D.O.M. BULL. 125 1943 P. 194

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1978 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.