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Stewart Mine

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. Economic information about the deposit and operations
  11. Links to other databases
  12. Bibliographic references
  13. Reporter information

Geologic information

Identification information

Deposit ID 10109386
MRDS ID M020131
Record type Site
Current site name Stewart Mine
Related records 10285920

Geographic coordinates

Geographic coordinates: -114.39413, 34.37615 (WGS84)
Relative position ON THE N. FLANK OF THE WHIPPLE MOUNTAINS 41 MI. N. TO NEEDLES BY ROAD.

Site location context

Political divisions (FIPS codes)

San Bernardino(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Havasu Lake(quadrangle 1:24,000 scale)

Parker(quadrangle 1:100,000 scale)

Needles(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Havasu-Mohave Lakes(hydrologic unit)

Lower Colorado(hydrologic accounting unit)

Lower Colorado(hydrologic subregion)

Lower Colorado(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 003N 025E 06 California

Comments on the location information

  • LOCATED IN NW 1/4 SECTION 6 , UTM APPROX

Commodities

Commodity Importance
Manganese Critical Primary

Materials information

Materials Type of material
Psilomelane Ore
Pyrolusite Ore

Analytical data

Result AVERAGE GRADE LESS THAN 35 PERCENT MANGANESE.

Host and associated rocks

  • Host or associated Host
    Rock type Unconsolidated Deposit > Alluvium
    Stratigraphic age (youngest) Pliocene

Nearby scientific data

(1) -114.39413, 34.37615
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: VERY SILICEOUS ORE
  • GEOL.DESC: FISSURE ZONES IN FANGLOMERATE IMPREGNATED WITH MANGANESE OXIDE. THE MAIN FISSURE HAS A SMOOTH FOOTWALL, GRADATIONAL HANGING WALL, STRIKES N. 10 TO 15 W., AND DIPS 65 TO 70 W. WALL ROCK IS POORLY SORTED SEDIMENTARY BRECCIA, WITH FRAGMENTS OF GRANITIC AND METAMORPHIC ROCKS, SANDSTONE, AND A FEW VOLCANIC ROCKS. ZONES ADJACENT TO THE FISSURES ARE CEMENTED, IMPREGNATED AND PARTLY REPLACED BY MANGANESE OXIDES. ORE IS MAINLY A SOFT, BLACK, CRYSTALLINE MINERAL, PROBABLY PYROLUSITE, AND SOME HARD PSILOMELANE. BROWN CALCITE MAY BE THE PRIMARY ORE.

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. 206 - 207

  • Deposit

    D.O.M. BULL. 125 1943 P. 164

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.