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Evening Star Prospect

Past Producer in Juab county in Utah, United States with commodities Fluorine-Fluorite, Uranium, Beryllium
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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. Alteration
  9. Host and associated rocks
  10. Nearby scientific data
  11. Geologic structures
  12. Ore body information
  13. Controls for ore emplacement
  14. Economic information about the deposit and operations
  15. Mining district
  16. Land status
  17. Workings at the site
  18. Links to other databases
  19. Bibliographic references
  20. Reporter information

Geologic information

Identification information

Deposit ID 10020400
MRDS ID DC13166
Record type Site
Current site name Evening Star Prospect
Related records 10130472

Geographic coordinates

Geographic coordinates: -113.18749, 39.71133 (WGS84)
Elevation 1570
Relative position 0.9 MILE NORTH OF USMM IN SEC. 10

Site location context

Political divisions (FIPS codes)

Juab(county)

Utah(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Topaz Mountain West(quadrangle 1:24,000 scale)

Fish Springs(quadrangle 1:100,000 scale)

Delta(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Southern Great Salt Lake Desert(hydrologic unit)

Great Salt Lake(hydrologic accounting unit)

Great Salt Lake(hydrologic subregion)

Great Basin(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management UT)

Bureau of Land Management UT BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Utah Juab

Public Land Survey System information

Meridian Township Range Section Fraction State
Salt Lake 013S 012W 10 Utah

Comments on the location information

  • SECTION SUBDIVISIONS NW 1/4 NE 1/4 NW 1/4

Commodities

Commodity Importance
Fluorine-Fluorite Critical Primary
Uranium Secondary
Beryllium Critical Secondary

Comments on the commodity information

  • CHIEF IMPURITIES ARE MONTMORILLONITE, CREAM COLORED DOLOMITE & QUARTZ

Materials information

Materials Type of material
Bertrandite Gangue
Carnotite Gangue

Alteration

  • (Local) Clay Alteration, Contact Metamorphism

Analytical data

Result 1964 DUMP SAMPLE = .023% U3O8

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Rhyolite
    Rock unit name Por, Rhyolitic Member Of Spor Mtn Formation;Umio Stratified Tuff Member Of Topaz Mtn Rhyolite
    Rock description Por, Rhyolitic Mbr Of Spor Mtn Formation;Umio Stratified Tuff Mbr Of Topaz Mtn Rhyolite
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Late Silurian
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Late Silurian
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite
    Rock unit name Lost Sheep Dolomite (Host)
    Rock description Lost Sheep Dolomite (Host)
  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Chert

Nearby scientific data

(1) -113.18749, 39.71133
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Basin & Range
Type of structure Local
Structure description A Fault Trending N26e Dips 60 Deg. Sw

Ore body information

  • General form VEIN
    Length 21.95M
    Width 0.2M

Controls for ore emplacement

  • Along Pipes And Veins In Favorable Replacement Carbonates & In Brecciated Fault Zones

Comments on the geologic information

  • FLUORSPAR IS EXPOSED ALONG A ZONE OF SHEARING & FAULTING FOR A DISTANCE OF ABOUT 72 FT. IT IS FINE-GRAINED, MASSIVE & PURPLE.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Small
Significant No
Discovery year 1953
Discoverer Glen Bunker & Sydney Searle

Mining district

District name Spor Mtn-Thomas Range

Land status

Ownership category BLM Administrative Area

Comments on the production information

  • PRODUCTION FIGURES NOT KNOWN

Workings at the site

  • Type of workings Surface/Underground
    Overall depth 4.57M
    Overall length 24.38M

Comments on the workings information

  • DOZER TRENCH 80 X 6 FT, INCLINE SHAFT

Comments on development

  • RECENT URANIUM EXPLOR. INDICATES A FAIR U3O8 CONTENT (UP TO 0.15-0.20%), BUT IT OCCURRS IN COMPLEX STRUCTURE WITH F IONS WHICH MAKES IT ECONOMICALLY MARGINAL FOR EXTRACTION

Reference information

Bibliographic references

  • Analytical Data

    SRC.REF: USGS PP 415

  • Deposit

    BULLOCK, K.C., 1976, FLUORITE OCCURRENCES IN UTAH: UTAH GEOL. & MINERAL SURVEY BULL. 110.

  • Deposit

    STAATZ, M.H., & OSTERWALD, F.W., 1959, GEOLOGY OF THE THOMAS RANGE FLUORSPAR DISTRICT, JUAB COUNTY: USGS BULL. 1069.

  • Deposit

    STAATZ, M.H., AND CARR, W.J., 1964, GEOLOGY AND MINERAL DEPOSITS OF THE THOMAS & DUGWAY RANGES, JUAB-TOOELE CO., UT: USGS PP 415.

  • Deposit

    STAATZ, M.H., AND WILMARTH, V.R., & BAUER, H.L., JR., 1951, RADIOACTIVE FLUORITE IN THE THOMAS RANGE, JUAB CO., UT: USGS TEI #136, 88 P.

  • Deposit

    COCHRAN, K.L., 1952, FLUORSPAR RESOURCES OF CALIFORNIA, NEVADA, UTAH, IDAHO, AND COLORADO ADJACENT AND TRIBUTARY TO FACILITIES OF THE UNION PACIFIC RAILROAD COMPANY: UNION AND PACIFIC RAILROAD COMPANY, LOS ANGLES, CALIFORNIA, 78 P.

  • Deposit

    1951 DIREXPL US AEC

  • Deposit

    1959 RECON STAATZ, USGS BULL. 1069

  • Deposit

    1964 RECON STAATZ, USGS PP 415

  • Deposit

    1979 GEOLMAP LINDSEY, D.A., USGS MAP-I-1176

  • Production

    EVERTS, M.L., 1980, ON SITE INVESTIGATION: UTAH GEOL. AND MINERAL SURVEY

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUN-1974 Unknown U.S. Geological Survey
Updater 01-MAR-1980 Everts, Mike L. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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