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Balmount Shaft

Past Producer in Summit county in Utah, United States with commodities Lead, Silver, Zinc, Gold, Copper
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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. Ownership information
  18. Production statistics
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10014912
MRDS ID D012017
Record type Site
Current site name Balmount Shaft
Alternate or previous names Silver Hill Shaft, Silver King Coalition Group, United Park City Mines

Geographic coordinates

Geographic coordinates: -111.53467, 40.61716 (WGS84)
Elevation 2789
Relative position 2100 FT N46E FROM JUPITER HILL

Site location context

Political divisions (FIPS codes)

Summit(county)

Utah(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Brighton(quadrangle 1:24,000 scale)

Salt Lake City(quadrangle 1:100,000 scale)

Salt Lake City(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Weber(hydrologic unit)

Weber(hydrologic accounting unit)

Great Salt Lake(hydrologic subregion)

Great Basin(hydrologic region)

Geographic areas

Country State County
United States Utah Summit

Public Land Survey System information

Meridian Township Range Section Fraction State
Salt Lake 002S 004E 30 SW OF SE OF NE Utah

Comments on the location information

  • INFO FROM LAND.ST :1983

Commodities

Commodity Importance
Lead Primary
Silver Primary
Zinc Critical Primary
Gold Secondary
Copper Secondary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Sphalerite Ore
Calcite Gangue
Quartz Gangue
Pyrite Unknown

Alteration

  • (Local) Oxidation, Silicification

Analytical data

Result AVERAGE GRADE WAS .019 OZ/TON AU, 7.5 OZ/TON AG, 11.33% PB, 6.01% ZN, AND .19% CU

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Crescent Dike
    Rock description Crescent Dike
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Late Triassic
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale
    Rock unit name Thaynes Formation;Ankareh Formation
    Rock description Thaynes Formation;Ankareh Formation
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) Alluvium and colluvium
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Uinta-Cottonwood Arch, Sevier Overthrust Belt, Iron Hollow Syncline
Type of structure Local
Structure description Northeast Striking Crescent Fault Zone

Ore body information

  • General form TABULAR, TABULAR
    Strike N40E TO N70E
    Dip 40SE TO 90SE

Controls for ore emplacement

  • Northeast Striking Faults Within Crescent Fault Zone, Intersection With Limestone Beds Of Thaynes

Comments on the geologic information

  • WORKINGS MAY HAVE PENETRATED INTO THE PARK CITY FORMATION. CRESCENT DIKE IS PARALLEL TO AND LIES ALONG THE HANGING WALL OF THE CRESCENT FAULT ZONE.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1925
Year of first production 1907
Year of last production 1952

Mining district

District name Park City District

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner United Park City Mines Co.

Production statistics

  • Year 1952
    Period 1907-1952
    Accuracy Accurate
    Description Cp_Grade: ^.019 Oz/Ton Au, 7.50 Oz/Ton Ag, 11.33% Pb, 6.01% Zn, .19% Cu
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Minor Ore Copper Copper 0wt-pct
    Major Ore Zinc Zinc 6wt-pct
    Major Ore Lead Lead 11wt-pct
    Major Ore Silver Silver 212g/mt
    Minor Ore Gold Gold 1g/mt

Comments on the production information

  • PRODUCTION FIGURES ORIGINALLY OBTAINED FROM THE SILVER KING COALITION MINES CO.

Comments on the workings information

  • SHAFT WAS 100 FT DEEP IN 1903 AND ABANDONED. BY 1907, HOWEVER, THE MINE WAS PRODUCING AND PRODUCED OVER 800,000 TONS BY 1952. THUS, UNDERGROUND WORKING MUST BE EXTENSIVE, PROBABLY TOTALLING WELL OVER 10,000 FT

Comments on development

  • IN 1903 WORKINGS CONSISTED OF A SHAFT 100 FT DEEP AND NO ORE HAD BEEN DISCOVERED. FIRST YEAR OF PRODUCTION WAS 1907 AND PRODUCTION WAS INTERMITTENT UNTIL 1952. PROPERTY IS CURRENTLY CONTROLLED BY UNITED PARK CITY MINES. PROPERTY WAS APPARENTLY RENAMED THE SILVER HILL SHAFT AFTER 1903 AND BEFORE 1907.

Reference information

Bibliographic references

  • Deposit

    BOUTWELL, J.M., 1912, GEOLOGY AND ORE DEPOSITS OF THE PARK CITY DISTRICT, UTAH: U.S. GEOLOGICAL SURVEY PROF. PAPER, NO. 77, 231 PP.

  • Deposit

    ERIKSON, A.J., (EDITOR), 1968, PARK CITY DISTRICT, UTAH: GUIDEBOOK TO THE GEOLOGY OF UTAH, NO. 22, UTAH GEOLOGICAL SOCIETY.

  • Deposit

    BUTLER, B.S., LOUGHLIN, G.F., HEIKES, V.C., AND OTHERS, 1920, THE ORE DEPOSITS OF UTAH: U.S. GEOLOGICAL SURVEY PROF. PAPER, NO. 111, 672 PP.

  • Deposit

    BARNES, M.P., AND SIMOS, J.S., 1968, ORE DEPOSITS OF THE PARK CITY DISTRICT WITH A CONTRIBUTION ON THE MAYFLOWER LODE, IN ORE DEPOSITS OF THE UNITED STATES: AM. INST. METALL. ENG., V. II, P. 1102

  • Deposit

    BAKER, A.A., CALKINS, F.C., CRITTENDEN, M.D., JR., AND BROMFIELD, C.S., 1966, GEOLOGIC MAP OF THE BRIGHTON QUADRANGLE, UTAH: U.S. GEOLOGICAL SURVEY GEOL. QUAD. MAP GQ-534.

  • Production

    BARNES AND SIMOS, 1968

General comments

Subject category Comment text
Deposit ORE OCCURS BOTH AS VEIN AND REPLACEMENT DEPOSITS. REPLACEMENT DEPOSITS ARE MORE VOLUMINOUS THAN VEIN ORE. REPLACEMENT TOOK PLACE ALONG 12 DIFFERENT HORIZONS OF THE THAYNES FORMATION, THE MOST ZONES PRESENT IN THE ENTIRE DISTRICT. REPLACED ZONES WERE PURE LIMESTONE SANDWICHED BETWEEN SANDSTONE OR IMPURE LIMESTONE LAYERS. REPLACEMENT OCCURED IMMEDIATELY ADJACENT TO THE CRESCENT FAULT ZONE. THIS MINE PRODUCED THREE QUARTERS OF ALL THE ORE MINED FROM THE CRESCENT FAULT ZONE. POSSIBLE PRODUCTION FROM THE UNDERLYING PARK CITY FORMATION ALSO.
Deposit Discovery Year: EARLY 1900'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1984 Shubat, Michael A. Utah Geological and Mineral Survey

Beyond USGS

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

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