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Murphy-Bramlette 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. Host and associated rocks
  8. Nearby scientific data
  9. Ore body information
  10. Economic information about the deposit and operations
  11. Land status
  12. Links to other databases
  13. Bibliographic references
  14. Reporter information

Geologic information

Identification information

Deposit ID 10033705
MRDS ID M020343
Record type Site
Current site name Murphy-Bramlette Prospect
Related records 10214573

Geographic coordinates

Geographic coordinates: -123.14722, 40.28818 (WGS84)
Relative position ON E. SLOPES OF S. FORK OF TRINITY RIVER, ABOUT 5 MI. W. - N. W. OF LUCKY BILL PROSPECT

Site location context

Political divisions (FIPS codes)

Trinity(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Smoky Creek(quadrangle 1:24,000 scale)

Garberville(quadrangle 1:100,000 scale)

Redding(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Fork Trinity(hydrologic unit)

Klamath(hydrologic accounting unit)

Klamath-Northern California Coastal(hydrologic subregion)

California(hydrologic region)

Federal lands

Shasta-Trinity 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
Mount Diablo 028N 011W 07 California

Commodities

Commodity Importance
Manganese Critical Tertiary

Analytical data

Result AVERAGE PROBABLY LESS THAN 15 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

  • Thickness 1.83M

Comments on the geologic information

  • GEOL.DESC: MANGANESE STAINED CHERTS EXPOSED FOR A FEW HUNDRED FT., TRENDING N. W. ABOVE ORE BED IS SLATE 30 FT. THICK, WHICH BECOMES SOFTER, CLOSER TO ORE BED. ABOVE SLATE IS A DENSE PORPHYRITIC GREENSTONE. BELOW ORE IS A 30 FT. BED OF EVENLY BANDED, CLIFF FORMING CHERT GENERALLY IN LAYER 1 TO 1.5 INCHES THICK. STRIKE IS N. 45 W. AND DIP IS 45 N. E. MANGANESE OXIDE OCCURS AS IRREGULAR OUTER RIMS AND FRACTURE FILLINGS IN DENSE AND BRECCIATED CHERT. IRREGULAR BUNCHES OF WHITE POROUS SILICA ARE COMMON. FRESH CHERT IS DARK GREEN OR BROWN, WITH PYRITE IN PLACES. ORE BED IS LESS THAN 6 FT. THICK

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Land status

Ownership category National Forest

Reference information

Bibliographic references

  • Deposit

    D.O.M. BULL. 152 1950 P. 331

  • Deposit

    D.O.M. BULL. 125 1943 P. 201

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.