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Lloyd Prospect

Prospect in Placer 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. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Ownership information
  11. Links to other databases
  12. Bibliographic references
  13. Reporter information

Geologic information

Identification information

Deposit ID 10097036
MRDS ID M012289
Record type Site
Current site name Lloyd Prospect

Geographic coordinates

Geographic coordinates: -120.98547, 39.0435 (WGS84)
Elevation 671
Relative position MOST LIKELY IN SW1/4 THIS SEC. THAN SE1/4 SEC 21 - N. OF NEW ENGLAND MILLS SCHOOLHOUSE, 1/2 MI. NW OF WEIMAR.

Site location context

Political divisions (FIPS codes)

Placer(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Colfax(quadrangle 1:24,000 scale)

Truckee(quadrangle 1:100,000 scale)

Chico(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Bear(hydrologic unit)

Lower Sacramento(hydrologic accounting unit)

Sacramento(hydrologic subregion)

California(hydrologic region)

Geographic areas

Country State County
United States California Placer

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 014N 009E 21 California

Commodities

Commodity Importance
Manganese Critical Tertiary

Materials information

Materials Type of material
Psilomelane Ore
Pyrolusite Ore

Nearby scientific data

(1) -120.98547, 39.0435
ListMap

Economic information

Comments on the geologic information

  • GEOL.DESC: PIT SUNK IN A REGOLITHIC BRECCIA CONSISTING OF WHITE CHERT FRAGMENTS CEMENTED BY BLACK MANGANESE OXIDES, CHIEFLY PSILOMELANE WITH BOTRYOIDAL SURFACES BUT ALSO SOME PYROLUSITE. MN CONTENT PROBABLY NOT OVER 10%. A SAMPLE TAKEN JUST SOUTH OF THE PIT (AREA NOW COVERED BY WATER) CONSISTED OF HIGH-GRADE BLACK OXIDES, PSILOMELANE AND PYROLUSITE, RAN ABOUT 50% MANGANESE.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic
Significant No

Ownership information

  • Type Owner
    Owner E. H. Lloyd
    First year 1942

Comments on the workings information

  • PIT 4 BY 4 FT. 5 FT. DEEP.

Reference information

Bibliographic references

  • Deposit

    DOM BULL. 152, P. 170; BULL. 125, P. 149

  • Deposit

    USGS FOLIO 66

  • Deposit

    DOM SR-67, PL. 1 (GEOLOGY)

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.