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  3. Mineral Resource Data System (MRDS)

Matilda Group

Past Producer in Riverside county in California, United States with commodity Tungsten
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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. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10035343
MRDS ID M022656
Record type Site
Current site name Matilda Group

Geographic coordinates

Geographic coordinates: -115.42888, 33.52949 (WGS84)
Relative position 14 MILES SOUTH OF BLYTHE HIGHWAY

Site location context

Political divisions (FIPS codes)

Riverside(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Red Cloud Canyon(quadrangle 1:24,000 scale)

Eagle Mountains(quadrangle 1:100,000 scale)

Salton Sea(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Salton Sea(hydrologic accounting unit)

Southern Mojave-Salton Sea(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 Riverside

Public Land Survey System information

Meridian Township Range Section Fraction State
San Bernardino 007S 015E 28 California

Commodities

Commodity Importance
Tungsten Critical Primary

Materials information

Materials Type of material
Scheelite Ore
Epidote Gangue
Garnet Gangue
Quartz Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Metamorphic Rock > Schist > Mica Schist

Nearby scientific data

(1) -115.42888, 33.52949
ListMap

Economic information

Ore body information

  • Strike NE
    Dip 45 NW

Comments on the geologic information

  • GEOL.DESC: MICA SCHIST IS INTRUDED BY DIORITE DIKES WHICH ARE IN PART SCHISTOSED. LIGHT COLORED DIKES ARE ALSO PRESENT, THEY ARE AS WIDE AS LONG, USUALLY NOT OVER 150 FT. LONG.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Comments on the production information

  • SINCE 1945, SHIPMENTS HAVE BEEN MADE TO THE METALS RESERVE CO. STOCKPILE, WHICH HAVE AVERAGED BETTER THAN 2% WO3. NO AVAILABLE PRODUCTION FIGURES.

Reference information

Bibliographic references

  • Deposit

    TUCKER, W. B. AND SAMPSON, R. J., 1945; MINERAL RESOURCES RIVERSIDE COUNTY; CA. JOUR. MINES AND GEOLOGY; VOL. 41, NO. 3, P. 155 - 156

  • Production

    TUCKER AND SAMPSON

General comments

Subject category Comment text
Deposit MICA SCHIST IS INTRUDED BY DIORITE DIKES WHICH ARE IN PART SCHISTOSED. LIGHT COLORED DIKES ARE ALSO PRESENT, THEY ARE AS WIDE AS LONG, USUALLY NOT OVER 150 FT. LONG.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1979 Fraticelli, L. A. (Albers, J.) U.S. Geological Survey REPLACING LOST LOCATION.
Updater 13-NOV-1997 Oland, G. P. (Orris, Greta J.) U.S. Geological Survey OLAND AND ORRIS MERGED RECORDS
Editor 08-MAY-1998 Mason, George 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.