Hilltop Mine

Past Producer in Juab county in Utah, United States with commodities Fluorine-Fluorite, Uranium, Beryllium
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. Ownership information
  18. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10098069
MRDS ID DC12947
Record type Site
Current site name Hilltop Mine
Related records 10275820

Geographic coordinates

Geographic coordinates: -113.19804, 39.76411 (WGS84)
Elevation 1698
Relative position THIS MINE IS LABELED ON USGS TOPO MAP

Site location context

Political divisions (FIPS codes)

Juab(county)

Utah(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Dugway Range SW(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 012S 012W 21 Utah

Comments on the location information

  • SECTION SUBDIVISIONS SE 1/4 SW 1/4 NE 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
Fluorite Ore
Bertrandite Gangue
Carnotite Gangue

Alteration

  • (Local) Clay Alteration

Analytical data

Result 1964 ASSAYS: RHYODACITE ORE BODY, OPEN CUT = .039% U3O8, .094% U3O8
Result PROSPECT, OPEN CUT, 800 FT NW OF MAIN WORKINGS = .039% U3O8
Result N. ORE BODY, OPEN CUT = .010% U3O8, .006% U3O8, 59.5% CAF2

Host and associated rocks

  • Host or associated Associated
    Rock type Volcanic Rock (Aphanitic) > Pyroclastic Rock > Volcanic Breccia (Agglomerate)
    Stratigraphic age (youngest) Miocene
    Stratigraphic age (youngest) Late Silurian
    Stratigraphic age (youngest) Late Silurian
  • 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;Intrusive Breccia
    Rock description Por. Rhyolitic Mbr Of Spor Mtn Formation;Umio Stratified Tuff Mbr Of Topaz Mtn Rhyolite;Intrusive Breccia
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite
    Rock unit name Harrisite Dolomite (Host)
    Rock description Harrisite Dolomite (Host)
  • Host or associated Host
    Rock type Sedimentary Rock > Chemical Sediment > Chert

Nearby scientific data

(1) -113.19804, 39.76411

Economic information

Geologic structures

Type of structure Regional
Structure description Basin & Range
Type of structure Local
Structure description Numerous Branching Faults That Are Difficult To Trace Unless They Contain Breccia

Ore body information

  • General form PIPE-LIKE
    Length 4.88M
    Width 1.52M

Controls for ore emplacement

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

Comments on the geologic information

  • A FAULT SW OF THE 2 PIPES DISPLACES BEDS ABOUT 50 FT

Economic information about the deposit and operations

Development status Past Producer
Commodity type Both
Deposit size Small
Significant No
Discovery year 1948
Discoverer E.J. Hamblin (Delta)
Year of first production 1948

Mining district

District name Spor Mtn-Thomas Range

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner E. J. Hamblin
    First year 1980
  • Type Owner
    Owner Fair Deal Mining Co

Workings at the site

  • Type of workings Surface
    Overall length 30.48M
    Overall width 24.38M

Comments on the workings information

  • WORKINGS CONSIST OF A BULLDOZER CUT, AND TWO OPEN PITS.

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 ; ECON.COM: MINE SOLD BY WILDEN F. CO. TO FAIR DEAL MINING CO. APRIL 1980

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit DEPOSIT CONSISTS OF 2 SMALL PIPES. THE ORE IS CHIEFLY BROWN FLUORSPAR BOXWORK.

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.

External references