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Big Cottonwood Mine

Past Producer in Salt Lake county in Utah, United States with commodities Iron, Copper, Tungsten
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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. Workings at the site
  19. Links to other databases
  20. Bibliographic references
  21. General comments
  22. Reporter information

Geologic information

Identification information

Deposit ID 10014867
MRDS ID D011935
Record type Site
Current site name Big Cottonwood Mine
Alternate or previous names Mountain Lake Group, Great Western Mines

Geographic coordinates

Geographic coordinates: -111.58495, 40.58272 (WGS84)
Elevation 2972
Relative position 3200 FT N 51 E FROM SUNSET PEAK

Site location context

Political divisions (FIPS codes)

Salt Lake(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)

Jordan(hydrologic unit)

Jordan(hydrologic accounting unit)

Great Salt Lake(hydrologic subregion)

Great Basin(hydrologic region)

Federal lands

Uinta-Wasatch-Cache National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Utah Salt Lake

Public Land Survey System information

Meridian Township Range Section Fraction State
Salt Lake 003S 003E 02 SW OF NW OF SW Utah

Comments on the location information

  • TOWNSHIP IS UNSURVEYED. MINE LOCATION IS MISLABELED ON 7.5 TOPOGRAPHIC MAP OF THE BRIGHTON QUADRANGLE ; INFO FROM LAND.ST :1983

Commodities

Commodity Importance
Iron Primary
Copper Secondary
Tungsten Critical Tertiary

Comments on the commodity information

  • MOSTLY AN IRON (MAGNETITE) PROSPECT WITH LOW GRADE COPPER ASSOCIATED

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Magnetite Ore
Scheelite Ore
Actinolite Gangue
Brucite Gangue
Chlorite Gangue
Epidote Gangue
Forsterite Gangue
Garnet Gangue
Phlogopite Gangue
Serpentine Gangue
Talc Gangue
Tremolite Gangue

Alteration

  • (Local) Calc-Silicate Zone Of Skarn Environment, Oxidation

Analytical data

Result 1.67% CU, 60% RECOVERY OF FE FROM THE ORE

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock unit name Clayton Peak Stock;Alta Stock
    Rock description Clayton Peak Stock;Alta Stock
    Stratigraphic age (youngest) Oligocene
    Stratigraphic age (youngest) Mississippian
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Gardison Limestone;Deseret Limestone
    Rock description Gardison Limestone;Deseret Limestone
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Dolomite

Nearby scientific data

(1) Gardison and Lodgepole Limestones
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Vinta-Cottonwood Arch, Sevier Overthrust Belt, Cordilleran Hingeline
Type of structure Local
Structure description Grizzly Thrust Fault

Ore body information

  • General form IRREGULAR
    Depth to top 0M

Controls for ore emplacement

  • Contact Zone Between Intrusive And Sediments

Comments on the geologic information

  • SOME UNUSUAL BORATES, LUDWIGITE AND MAGNESIOLUDWIGITE, ARE ABUNDANT. OTHER, UNUSUAL MINERALS SUCH AS EPHOSITE, SUSSEXITE, XANTHOPHYLLITE, AND HYDROMAGNESITE MAY ALSO BE PRESENT. CARBONATES FORM A ROOF PENDANT SUSPENDED BETWEEN THE ALTA STOCK TO THE NORTHWEST AND THE CLAYTON PEAK STOCK TO THE SOUTHEAST. THE SKARN ZONE IS ABOUT 50 FT THICK.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1875
Year of first production 1875
Year of last production 1907

Mining district

District name Big Cottonwood District

Land status

Ownership category Private

Ownership information

  • Type Owner
    Owner Great Western Mines Co.
    Home office Ogden, Ut.

Comments on the production information

  • SMALL SHIPMENTS WERE MADE IN 1875. IN 1907 SMALL SHIPMENTS OF COPPER ORE WERE SENT TO THE TINTIC SMELTER

Comments on the reserve resource information

  • BULLOCK, K.C., 1970

Workings at the site

  • Type of workings Underground
    Length 262.13M

Comments on the workings information

  • THE PORTAL OF THE MINE IS CUT IN GRANODIORITE, THE ADIT EXTENDS SW FOR 700 FT IN GRANODIORITE. THEN A CROSSCUT PASSES THROUGH 110 FT 8F SKARN. A DRIFT THEN CUTS ABOUT 30 FT OF MAGNETITE

Comments on development

  • SURFACE RIGHTS ARE OWNED BY WASATCH NATIONAL FOREST. METALURGICAL TESTING BY THE USBM IN 1970, USING STRAIGHT MAGNETIC SEPARATION AND FLOTATION SUCCESSFULLY REMOVED COPPER AND SULFUR FROM IRON ORE. GRINDING TO-100 MESH WAS NECESSARY.

Reference information

Bibliographic references

  • Deposit

    JAMES, L.P., 1979, GEOLOGY, ORE DEPOSITS, AND HISTORY OF THE BIG COTTONWOOD MINING DISTRICT, SALT LAKE COUNTY, UTAH: U.G.M.S. BULL. NO. 114.

  • Deposit

    CALKINS, F.C., AND BUTLER, B.S., 1943, GEOLOGY AND ORE DEPOSITS OF THE COTTONWOOD-AMERICAN FORK AREA, UTAH: U.S. GEOLOGICAL SURVEY PROF. PAPER, NO. 201.

  • 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.

  • 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

  • Deposit

    BULLOCK, K.C., 1970, IRON DEPOSITS OF UTAH: U.G.M.S. BULL. 88, P. 72

  • Deposit

    CRAWFORD, A.L., AND BURANEK, A.M., 1957, TUNGSTEN RESERVES DISCOVERED IN THE COTTONWOOD-AMERICAN FORLE MINING DISTRICTS. UTAH: UTAH GEOL. AND MIN. SURVEY REPRINT NO. 55

  • Production

    BULLOCK, K.C., 1970

General comments

Subject category Comment text
Deposit DEPOSIT IS A LOW-GRADE COPPER-BEARING MAGNETITE METASOMATIC REPLACEMENT DEPOSIT. THE NORTH ORE BODY IS CRESCENT SHAPED, 375 FT LONG, 50 FT THICK, AND STRIKES EAST-WEST. THE SOUTH ORE BODY STRIKES NNW FOR 315 FT AND IS 20 FT THICK. THE THIRD ORE BODY IS UNDERGROUND, STRIKE, NNW, AND IS OF UNDETERMINED EXTENT
Deposit Discovery Year: LATE 1800'S

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-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.

External references

Maps centered on this site