Porphyry Knob Prospect #1

Occurrence in Tooele county in Utah, United States with commodities Gold, Mercury, Arsenic, Silver, Antimony, Iron
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. Links to other databases
  18. Bibliographic references
  19. General comments
  20. Reporter information

Geologic information

Identification information

Deposit ID 10012700
MRDS ID D008538
Record type Site
Current site name Porphyry Knob Prospect #1

Geographic coordinates

Geographic coordinates: -112.22858, 40.33522 (WGS84)
Elevation 2426
Relative position 4,250 FT S 18 W OF PORPHYRY HILL

Site location context

Political divisions (FIPS codes)

Tooele(county)

Utah(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Mercur(quadrangle 1:24,000 scale)

Rush Valley(quadrangle 1:100,000 scale)

Tooele(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Rush-Tooele Valleys(hydrologic unit)

Great Salt Lake(hydrologic accounting unit)

Great Salt Lake(hydrologic subregion)

Great Basin(hydrologic region)

Geographic areas

Country State County
United States Utah Tooele

Public Land Survey System information

Meridian Township Range Section Fraction State
Salt Lake 005S 003W 31 SW OF SW OF SW Utah

Comments on the location information

  • INFO FROM LAND.ST :(1977)

Commodities

Commodity Importance
Gold Primary
Mercury Secondary
Arsenic Critical Secondary
Silver Secondary
Antimony Critical Secondary
Iron Tertiary

Materials information

Materials Type of material
Cinnabar Ore
Orpiment Ore
Pyrite Ore
Realgar Ore
Stibnite Ore
Calcite Gangue
Chlorite Gangue
Quartz Gangue
Sericite Gangue

Alteration

  • (Local) Dolomitization, Sericitization And Silicification

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Great Blue Limestones;Long Trail Shale Member Of The Great Blue Formation
    Rock description Great Blue Limestones;Long Trail Shale Mbr. Of The Great Blue Formation
    Stratigraphic age (youngest) Mississippian

Nearby scientific data

(1) -112.22858, 40.33522

Economic information

Geologic structures

Type of structure Regional
Structure description Basin And Range
Type of structure Local
Structure description Fissures, Fractures, Folds

Ore body information

  • General form IRREGULAR

Controls for ore emplacement

  • Fissures And Fractures

Comments on the geologic information

  • WALLROCKS ARE HIGHLY DEFORMED AND ALTERED. LIMESTONES ARE DARK GRAY TO BLACK, DOLOMITIZED, AND SILICIFIED. SHALES ARE GREENISH GRAY TO BLACK, PULVERIZED, SERICITIC, CALCAREOUS, CARBONACEOUS AND KAOLIMITIC. LIMONITIC STAINS ARE COMMON ON HOSTROCKS.

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Mercur District

Land status

Ownership category Private

Comments on the workings information

  • PITS AND TRENCHES

Reference information

Bibliographic references

  • Deposit

    BISSELL,H.J.,ET. AL.,1959, GUIDEBOOK TO THE GEOLOGY OF UTAH, NO.14, UT. GEOL. SOC.: U.G.M.S. BULL.14,262P.

  • Deposit

    GILLULY,J.,1932,GEOLOGY AND ORE DEPOSITS OF THE STOCKTON AND FAIRFIELD QUADRANGELS: U.S.G.S. PROF. PA.173,167P.

  • Deposit

    BUTTLER,B.S.,ET. AL.,1920, THE ORE DEPOSITS OF UTAH: U.S.G.S. PROF. PA. 111, 672P.

  • Deposit

    SPURR, J.E., 1895, ECONOMIC GEOLOGY OF THE MERCUR MINING DISTRICT,UTAH: U.S.G.S. 16TH. ANN. REPT.,PT.2, 454P.

General comments

Subject category Comment text
Deposit MINERALIZED ZONE IS LOCALIZED IN ALTERED WALLROCKS.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1981 Mohammad, Hasan Utah Geological and Mineral Survey

Beyond USGS

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