1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Ontario Mine

Past Producer in Summit county in Utah, United States with commodities Silver, Lead, Zinc, Copper, Gold
Map
XML
JSON
KML
B
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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Land status
  16. Ownership information
  17. Production statistics
  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 10087989
MRDS ID D012036
Record type Site
Current site name Ontario Mine
Related records 10300784

Geographic coordinates

Geographic coordinates: -111.498, 40.62411 (WGS84)
Elevation 2414
Relative position 7,350 FT N 40 W OF BALD MTN.

Site location context

Political divisions (FIPS codes)

Summit(county)

Utah(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Heber City(quadrangle 1:24,000 scale)

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

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

Hydrologic units (watersheds)

Upper 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 21 SW OF SW OF SE Utah

Comments on the location information

  • LOCATION IS TO ONTARIO NO. 3 SHAFT ; INFO FROM LAND.ST :1973

Commodities

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

Materials information

Materials Type of material
Calcite Gangue
Dolomite Gangue
Epidote Gangue
Garnet Gangue
Hematite Gangue
Limonite Gangue
Magnetite Gangue
Pyrite Gangue
Pyrrhotite Gangue
Quartz Gangue
Rhodonite Gangue
Serpentine Gangue

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Doughnut And Humbug;Deseret Limestone
    Rock description Doughnut And Humbug;Deseret Limestone
    Stratigraphic age (youngest) Mississippian

Nearby scientific data

(1) -111.498, 40.62411
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Uinta Arch
Type of structure Local
Structure description Park City Anticline

Ore body information

  • General form TABULAR
  • General form TABULAR

Controls for ore emplacement

  • East - West Trending Fissure System

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Large
Significant No
Discovery year 1872
Discoverer Rector Steen
Year of first production 1873

Mining district

District name Park City District

Land status

Ownership category Private

Ownership information

  • Type Operator
    Owner Noranda Ltd.
  • Type Owner
    Owner United Park City Mines Co.

Production statistics

  • Year 1967
    Period 1875-1967
    Material AG
    Accuracy Estimate
    Description Cp_Grade: ^22.70 Oz./Ton
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Silver Silver 641g/mt
  • Year 1967
    Period 1875-1967
    Material AU
    Accuracy Estimate
    Description Cp_Grade: ^.0535 Oz./Ton
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Gold Gold 2g/mt
  • Year 1967
    Period 1875-1967
    Material PB
    Accuracy Estimate
    Description Cp_Grade: ^3.97%
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Lead Lead 4wt-pct

Workings at the site

  • Type of workings Surface
    Length 563255M
    Overall depth 701.04M

Comments on the workings information

  • EXTENSIVE WORKINGS, MUCH OF WHICH HAS BEEN ALLOWED TO CAVE. PRIMARY ACCESS IS THROUGH THE 1500 LEVEL DRAIN TUNNEL (KEETLEY TUNNEL) AND THROUGH THE ONTARIO NO. 3 SHAFT.

Comments on development

  • RECTOR STEEN DISCOVERED THE OUTCROP IN 1872 AND SOLD TO DEVELOPERS WHO STARTED PRODUCTION IN 1873. THE PROPERTY WAS CONSOLIDATED INTO THE ONTARIO SILVER MINING CO. WHICH OPERATED UNTIL 1936 WHEN IT MERGED WITH THE PARK UTAH CONSOLIDATED MINES CO. THE PARK UTAH MERGED WITH THE SILVER KING COALITION MINES CO. IN 1953 TO FORM THE PRESENT OWNER, THE UNITED PARK CITY MINES CO. PARK CITY VENTURES (60% ANACONDA, 40% ASARCO) LEASED THE ONTARIO IN AUGUST, 1970 AND BUILT A 700 TON PER DAY CONCENTRATER. THEY LATER DROPPED THE LEASE WHICH WAS THEN PICKED UP BY NORANDA LTD. LOW SILVER PRICES AND WATER PROBLEMS FORCED NORANDA TO LATER DROP THE LEASE.

Reference information

Bibliographic references

  • Deposit

    BOUTWELL, J.M., 1912, GEOLOGY AND ORE DEPOSITS OF THE PARK CITY DISTRICT, UTAH: USGS PROF. PA. 77, 230 P.

  • Deposit

    ERICKSON, A.J., JR. (ED.), 1968, GUIDEBOOK TO THE GEOLOGY OF UTAH - PARK CITY DISTRICT, UTAH: UTAH GEOLOGICAL SOCIETY GUIDEBOOK NO. 22, 100 P.

  • Deposit

    PERRY, L.I., AND MC CARTHY, B.M., 1977, LEAD AND ZINC IN UTAH: UGMS OFR-22.

  • Deposit

    BROMFIELD, C.S. AND OTHERS, 1970, GEOLOGIC MAP OF THE HEBER QUADRANGLE, WASATCH AND SUMMIT COUNTIES, UTAH: USGS MAP GQ - 864.

  • Deposit

    BARNES, M.P. AND J.G. SIMOS, 1968, ORE DEPOSITS OF THE PARK CITY DISTRICT WITH A CONTRIBUTION ON THE MAYFLOWER LODE: ORE DEPOSITS OF THE UNITED STATES, 1933 - 1967 (GRATON - SALES): AIME, VOL. 2, CH. 53, P. 1103-1126, NEW YORK.

  • Production

    ERICKSON, A.J., 1968, P. 2.

General comments

Subject category Comment text
Deposit ORE BODIES STRIKE IN AN ENE DIRECTION AND DIP STEEPLY TO THE NORTH. VEIN ORE WAS THE PRINCIPAL PRODUCT OF THE EARLY PERIOD OF THE MINE AND EXTENDS FROM THE SURFACE DOWN TO ABOUT THE 1300 FT. LEVEL WHERE REPLACEMENT DEPOSITS IN THE LIMESTONE AND DOLOMITES (PREDOMINANTLY THE DOUGHNUT, HUMBUG AND DESERET LIMESTONES) PREDOMINATE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JAN-1984 Tripp, Bryce T. Utah Geological and Mineral Survey

Beyond USGS

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

External references

Maps centered on this site