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White Monster - Sigma

Past Producer in Inyo county in California, United States with commodity Boron-Borates
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Geologic information

Identification information

Deposit ID 10023437
MRDS ID I000398
Record type Site
Current site name White Monster - Sigma

Geographic coordinates

Geographic coordinates: -116.69116, 36.32109 (WGS84)
Location accuracy 1000(meters)
Relative position 1.25 MI W OF RYAN., Estimated Location, +/- 0.3 Mile.
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Geographic areas

Country State County
United States California Inyo

Public Land Survey System information

Meridian Township Range Section Fraction State
025N 003E 6 California

Commodities

Commodity Importance
Boron-Borates Primary

Materials information

Materials Type of material
Colemanite Ore
Ulexite Ore
Calcite Gangue

Mineral occurrence model information

Model code 260
USGS model code 35b.3
Deposit model name Lacustrine borates

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Mudstone
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Miocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Rock unit name Furnace Creek Formation
    Rock description Furnace Creek Formation

Nearby scientific data

(1) -116.69116, 36.32109
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Ore body information

  • Strike NW
    Dip 5-15NE
    Thickness 82.3M
    Length 579.12M

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Non-metallic
Significant No

Mining district

District name Death Valley

Land status

Area name Death Valley National Monument

Ownership information

  • Type Owner
    Owner Tennexo Mining Inc. (Sigma Mine); U.S. Borax And Chemical Co. (White Monster Mine)

Reserves and resources

  • Type In-situ
    Estimate year 1976
    Total resources 2,004,000mt ore
    Commodity Subtype Grade units Group Importance Year
    Boron-Borates B2O3 23 wt-pct Boron Major 1976

Comments on the reserve resource information

  • IT IS ESTIMATED BY EVANS AND OTHERS (1976) THAT 85% OF THE RESERVES AND RESOURCES ARE RECOVERABLE.

Workings at the site

  • Type of workings Surface
    Overall length 152.4M
    Overall width 152.4M

Comments on the workings information

  • IN 1976, PIT WAS 500 FT BY 500 FT AND A FEW FEET TO 60 FT DEEP.

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS I000398

Bibliographic references

  • Deposit

    EVANS, J.R., TAYLOR, G.C., AND RAPP, J.S., 1976, MINES AND MINERAL DEPOSITS IN DEATH VALLEY NATIONAL MONUMENT, CALIFORNIA: CALIFORNIA DIVISION OF MINES AND GEOLOGY SPECIAL REPORT 125, 61 P

  • Production

    EVANS AND OTHERS, 1976.

  • Reserve-Resource

    DEPOSIT ESTIMATE BASED ON DATA FROM EVANS, 1976.

General comments

Subject category Comment text
Deposit THE DEPOSIT AVERAGES 1100 FT WIDE AND IS 1900 FT LONG DOWN DIP. THICKNESS RANGES FROM 0-270 FT (AVE. 200 FT). COLEMANITE-CALCITE MINERALIZATION ENCLOSES ULEXITE-PROBERTITE MINERALIZATION.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-FEB-90 Orris, Greta J. U.S. Geological Survey