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Landrum

Past Producer in Mariposa county in California, United States with commodities Gold, Copper
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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. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Land status
  14. Ownership information
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10031129
MRDS ID M009723
Record type Site
Current site name Landrum
Alternate or previous names Barley Field Simeon Laudrum Mine
Related records 10140419

Geographic coordinates

Geographic coordinates: -119.97237, 37.54882 (WGS84)
Elevation 884
Relative position 1 MI. S COLORADO SCHOOL

Site location context

Political divisions (FIPS codes)

Mariposa(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Feliciana Mountain(quadrangle 1:24,000 scale)

Yosemite Valley(quadrangle 1:100,000 scale)

Mariposa(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Merced(hydrologic unit)

San Joaquin(hydrologic accounting unit)

San Joaquin(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 Mariposa

Public Land Survey System information

Meridian Township Range Section Fraction State
Mount Diablo 004S 018E 27,34 California

Commodities

Commodity Importance
Gold Primary
Copper Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Gold Ore
Talc Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Ultramafic Intrusive Rock > Hornblendite
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Economic information

Ore body information

  • Strike N 35 - 40 W
    Dip 45 SW
    Thickness 3.05M
    Depth to top 0M

Controls for ore emplacement

  • Vein Is Accompanied By A Clayey, Altered Dike, Partly Mineralized.

Comments on the geologic information

  • GEOL.DESC: MAIN VEIN IS BRECCIATED, A SECOND VEIN OUTCROPS 50 - 60 FT. SW OF MAIN VEIN & IS ROUGHLY PARALLEL. IT IS 4 - 5 FT. THICK, DIPPING SW 50 - 65. ABOUT 400 FEET NW OF THE END LINE OF OLD STANDBY CLAIM & SLIGHTLY ENECHELON TO LANDRUM VEIN IS A 2 FT. THICK VEIN OF BLUISH GLASSY QUARTZ WITH CHALCOPYRITE. BOWEN & GRAY ( 1957 ) CALL WALL ROCKS GRANITIC, LAIZURE ( 1928 ) CALL WALL ROCKS LIMESTONE & TALC FOOTWALL, PORPHYRY HANGING WALL.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1889
Production years 1897 - 1905

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner George Matlock

Comments on the production information

  • PRESENT OWNER DOES EXPLORATORY WORK.

Workings at the site

  • Type of workings Surface/Underground
    Length 271.27M
    Overall depth 27.43M

Comments on the workings information

  • SURFACE WORKINGS MAY BE CAVED STOPES

Reference information

Bibliographic references

  • Deposit

    BOWEN, O. E., JR., GRAY, C. H., JR., 1957 , MINES AND MINERAL DEPOSITS OF MARIPOSA COUNTY, CALIFORNIA: CALIF. JOUR. MINES AND GEOLOGY, V. 53 , NOS. 1 AND 2 , P. 116 - 117 , 275 .

  • Deposit

    LAIZURE, C. MCK., 1928 , SAN FRANCISCO FIELD DIVISION IN TWENTY-FOURTH REPORT OF THE STATE MINERALOGIST: CALIFORNIA STATE MINING BUREAU. P. 94 .

  • Deposit

    CASTELLO, W. O., 1921 , MINES AND MINERAL RESOURCES OF MARIPOSA COUNTY IN SEVENTEENTH REPORT OF THE STATE GEOLOGIST: CALIFORNIA STATE MINING BUREAU, P. 120 .

  • Deposit

    AUBURY, L. E., 1904 , REGISTER OF MINES AND MINERALS MARIPOSA COUNTY CALIFORNIA: CALIFORNIA STATE MINING BUREAU, P. 11 .

  • Production

    BOWEN & GRAY 1957

General comments

Subject category Comment text
Deposit VEIN
Deposit ONE CLAIM, THE OLD STANDBY, 20 ACRES SURVEYED BUT UNPATENTED, FORMERLY PART OF A GROUP OF THREE INCLUDING THE SIMEON LANDRUM BUT OTHER CLAIMS HAVE APPARENTLY BEEN ABANDONED. MINE IS CHARACTERIZED BY POCKETS OF VERY RICH ORE WHICH ARE IN PLACES FOUND IN VEIN QUARTZ AND IN OTHERS IN DISINTEGRATED DIKE MATERIAL. MAY BE ACTIVE. OPEN CUT MINING MAY BE FEASABLE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1973 Gere, W. U.S. Geological Survey
Updater 01-JAN-1979 Bowman, J. And 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.