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Union Pass Magnetite Taconite

Occurrence in Sublette county in Wyoming, United States with commodity Iron
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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. Host and associated rocks
  9. Nearby scientific data
  10. Geologic structures
  11. Ore body information
  12. Economic information about the deposit and operations
  13. Land status
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10080837
MRDS ID W032215
MAS/MILS ID 560350014
Record type Site
Current site name Union Pass Magnetite Taconite
Alternate or previous names Clear Creek Area, Clear Clear Creek Occurrence, Union Pass District Magnetite Taconite

Geographic coordinates

Point of reference Approximate
Geographic coordinates: -109.70417, 43.30833 (WGS84)
Elevation 3353
Location accuracy 10000(meters)
Relative position In a cirque in the Clear Creek drainage higher than 11,000 ft. elevation. 1.75 mi west of Downs Mountain or Downs Peak, Est. Probably within 1.5 mi.

Site location context

Political divisions (FIPS codes)

Sublette(county)

Wyoming(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Downs Mountain(quadrangle 1:24,000 scale)

Gannett Peak(quadrangle 1:100,000 scale)

Thermopolis(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Green(hydrologic unit)

Upper Green(hydrologic accounting unit)

Great Divide-Upper Green(hydrologic subregion)

Upper Colorado(hydrologic region)

Federal lands

Bridger-Teton National Forest(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Bridger Wilderness(Wilderness)

Wilderness FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country State County
United States Wyoming Sublette

Public Land Survey System information

Meridian Township Range Section Fraction State
6th Principal 039N 107W South central Wyoming

Comments on the location information

  • South central part of township in a cirque in the Clear Creek drainage at an elevation greater than 11,000 ft.
  • Moved old MRDS location at -109-44-2 43-18-27 to -109-42-15 43-18-30 to be 1.75 mi. West of Downs Peak and in a cirque above 11,000 ft. Assume this is the upper reaches of Clear Creek. Clear Creek is labeled on the west side of Bear Lake but not on the east side between Hunters Hump and Northwest Peak.

Commodities

Commodity Importance
Iron Primary

Materials information

Materials Type of material
Magnetite Ore
Garnet Gangue
Pyroxene Gangue
Quartz Gangue
Amphibole Gangue

Analytical data

Result ESTIMATED FE CONTENT IS 20 percent.

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Gneiss > Migmatite
    Stratigraphic age (youngest) Neoproterozoic
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Associated
    Rock type Metamorphic Rock > Amphibolite
  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
  • Host or associated Host
    Rock type Metamorphic Rock > Amphibolite

Nearby scientific data

Approximate (1) -109.70417, 43.30833
ListMap

Economic information

Geologic structures

Type of structure Local
Structure name Parallel synformal taconite layers

Ore body information

  • General form LINEAR
    Thickness 9.14M
    Length 762M
    Width 487.68M

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Land status

Ownership category National Forest
Area name Bridger

Reference information

Bibliographic references

  • Deposit

    Osterwald and others, 1966, Mineral Resources of Wyoming: Geological Survey of Wyoming Bull. 50 [revised ed.], p. 110.

  • Deposit

    A TACONITE OCCURreNCE IN NORTHERN WIND RIVER RANGE, WYOMING, 1966, UNPUBLISHED REPORT, GSW FILES. [reference not verified by A.B. Wilson, 1-30-2009]

  • Deposit

    Wyoming Geological Survey Preliminary Report No. 10, 1968, 15 p. [reference not verified by A.B. Wilson, 3-10-2009]

  • Deposit

    Harrer, 1966, Wyoming Iron-Ore Deposits: USBM IC-8315, p. 43.

General comments

Subject category Comment text
Deposit SURFACE EXPOSURES OF THE BODY COMPRISE 60-70% OF THE OUTCROP AREA OF 1600 BY 2500 FT. The taconite occurs IN PARALLEL LAYERS 5-30 FT THICK that are SYNFORMAL IN STRUCTURE. Precambrian gneiss an dmigmatite separate the leayers. Migmatite and amphibolite surround the taconite.
Deposit Deposit has never produced (comment moved from newMRDS 10303290=MAS 0560350014)
Deposit Length 1080 m, Width 750 m, Thickness 90 m. Type of Orebody #1: Other Shape of Orebody #1: Lenticular Type of Orebody #2: Sedimentary Shape of Orebody #2: Irregular Shape of Orebody #3: Tabular Primary Mode of Origin: Seidimenation Seconary mode of Origin: metamorphism Primary Ore control: Folding Secondary Ore Control: Lithology Degree of Wallrock Alter. : None Strike and Dip: E00W Minimum Depth to Top: 0 Avg. Thick. Unconsol. mat. : 0 Min. Thick. Unconsol. mat. : 0 Date of last Modification : 780213 [Info from 10303290, formerly MAS 0560350014, merged and deleted]

Reporter information

Type Date Name Affiliation Comment
Reporter 1977-10-01 Suekawa, Harry S. (Barari, Rachel A.) U.S. Geological Survey
Editor 2009-01-30 Wilson, Anna B. U.S. Geological Survey
Reporter 1983-03-01 Barari, Rachel A. U.S. Geological Survey
Reporter 1984-02-27 Wilson, unknown (NOT Anna B.) U.S. Bureau of Mines

Beyond USGS

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

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