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Big Reef

Producer in San Bernardino 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 10033529
MRDS ID M020111
Record type Site
Current site name Big Reef
Alternate or previous names Black Butte, Hangover, Bobbie Sullivan, End Line, Clark, Clark No. 1, Next Time, Pisgah, Willkie
Related records 10116066

Geographic coordinates

Geographic coordinates: -116.33918, 34.80584 (WGS84)
Relative position 2 1/2 MI. N. OF PISGAH SIDING ON THE SANTA FE RAILROAD, BETWEEN NEWBERRY AND LUDLOW. AT THE S. BASE OF AN ISOLATED HILL S. OF THE CADY MOUNTAINS.

Site location context

Political divisions (FIPS codes)

San Bernardino(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Sleeping Beauty(quadrangle 1:24,000 scale)

Newberry Springs(quadrangle 1:100,000 scale)

San Bernardino(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Mojave(hydrologic unit)

Northern Mojave(hydrologic accounting unit)

Northern Mojave-Mono Lake(hydrologic subregion)

California(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management CA)

Bureau of Land Management CA BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States California San Bernardino

Public Land Survey System information

Meridian Township Range Section Fraction State
San Bernardino 008N 006E 10 California

Commodities

Commodity Importance
Manganese Critical Primary

Materials information

Materials Type of material
Psilomelane Ore
Pyrolusite Ore

Analytical data

Result AVERAGE GRADE 30 TO 35 PERCENT MANGANESE

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Stratigraphic age (youngest) Pliocene
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite

Nearby scientific data

(1) -116.33918, 34.80584
ListMap

Economic information

Ore body information

  • Width 2.44M

Comments on the geologic information

  • GEOL.DESC: BRECCIATED ZONE 6 TO 8 FT. WIDE IN ANDESITE IN WHICH FRAGMENTS OF THE WALL ROCK ARE CEMENTED BY MANGANESE OXIDE. WELL DEFINED VEINLETS OF MANGANESE OXIDE AND CALCITE CUT THROUGH THE MATRIX. THE ORE BODY DEVELOPED ALONG A FISSURE WHICH HAS A SMOOTH FOOTWALL AND A GRADATIONAL HANGING WALL. THE ORE IS MAINLY PSILOMELANE-TYPE, AND SOME SOFT, BLACK CRYSTALLINE MINERAL, PROBABLY PYROLUSITE. A FIBROUS DARK-GREY OR BLACK MINERAL IS PRESENT WITH IMPURE SOFT BLACK OXIDE.

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Deposit size Small
Significant No

Reference information

Bibliographic references

  • Deposit

    D.O.M. BULL. 152 1950 PP. 188 - 191

  • Deposit

    D.O.M. BULL. 125 1943 P. 160

Reporter information

Type Date Name Affiliation Comment
Reporter 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.