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  3. Mineral Resource Data System (MRDS)

Cottonwood

Occurrence 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. Reserves and resources
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10094240
MRDS ID D000972
Record type Site
Current site name Cottonwood
Alternate or previous names Magnesium Canyon Tungsten Mine
Related records 10188542

Geographic coordinates

Geographic coordinates: -116.45085, 33.73337 (WGS84)
Elevation 495
Relative position 10 MILES SE OF PALM SPRINGS

Site location context

Political divisions (FIPS codes)

Riverside(county)

California(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Rancho Mirage(quadrangle 1:24,000 scale)

Palm Springs(quadrangle 1:100,000 scale)

Santa Ana(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Salton Sea(hydrologic accounting unit)

Southern Mojave-Salton Sea(hydrologic subregion)

California(hydrologic region)

Federal lands

ST(Federal land areas administered by ST)

Geographic areas

Country State County
United States California Riverside

Public Land Survey System information

Meridian Township Range Section Fraction State
San Bernardino 005S 005E 22 California

Commodities

Commodity Importance
Tungsten Critical Tertiary

Comments on the commodity information

  • (1) LEMMON, D. M., (2) TUCKER AND SAMPSON

Materials information

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

Analytical data

Result .08 - 1.0% (1), 1 - 1.5% WO3 (2)

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss

Nearby scientific data

(1) -116.45085, 33.73337
ListMap

Economic information

Ore body information

  • General form TABULAR
    Strike N 15 W
    Dip 15 - 20 SW
    Thickness 1.83M
    Length 91.44M

Comments on the geologic information

  • GEOL.DESC: GRANITE SILLS 10 - 200 FT. THICK

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Significant No

Reserves and resources

  • Type In-situ
    Estimate year 1944
    Total resources 4000mt ore
    Commodity Subtype Grade units Group Importance Year
    Tungsten Wo3 0.4 wt-pct Tungsten Trace 1944

Comments on the reserve resource information

  • A TACTITE BED 100 FT. BY 60 FT. WITH A THICKNESS OF 13 FT. IS ESTIMATED TO CONTAIN 7000 TONS.

Comments on the workings information

  • TOP AND BOTTOM LAYERS ARE POORLY EXPOSED, BUT 2 INTERMEDIATE LAYERS ARE WELL EXPOSED IN DEEP TRENCHES AND IN A 25 FT. SHAFT. AREA TRENCHED IS 80 FT. BY 140 FT.

Reference information

Bibliographic references

  • Deposit

    LEMMON, D. M., TUNGSTEN IN THE US; UNPUBLISHED DATA, P. 309.

  • Deposit

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

  • Reserve-Resource

    LEMMON, D. M.

General comments

Subject category Comment text
Deposit FOUR FLAT LYING LAYERS, SEPERATED BY GRANITE SILLS
Deposit CLAIMS INCLUDE COTTONWOOD NO. 1, NO. 2 AND NO. 3

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1974 Elliott, James E. U.S. Geological Survey
Updater 01-NOV-1979 Fraticelli, L. A. (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.