Union Pass Magnetite Taconite

The Union Pass Magnetite Taconite is a iron mine located in Sublette county, Wyoming at an elevation of 11,001 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Name: Union Pass Magnetite Taconite  

State:  Wyoming

County:  Sublette

Elevation: 11,001 Feet (3,353 Meters)

Commodity: Iron

Lat, Long: 43.30833, -109.70417

Map: View on Google Maps

Satelite View

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Satelite image of the Union Pass Magnetite Taconite

Union Pass Magnetite Taconite MRDS details

Site Name

Primary: Union Pass Magnetite Taconite
Secondary: Clear Creek Area
Secondary: Clear Clear Creek Occurrence
Secondary: Union Pass District Magnetite Taconite


Commodity

Primary: Iron


Location

State: Wyoming
County: Sublette


Land Status

Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Administrative Organization: Bridger


Holdings

Not available


Workings

Not available


Ownership

Not available


Production

Not available


Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Middle Rocky Mountains


Mineral Deposit Model

Not available


Orebody

Form: LINEAR


Structure

Type: L
Structure: Parallel synformal taconite layers


Alterations

Not available


Rocks

Name: Migmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic

Name: Migmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic


Analytical Data

Analytical Data: ESTIMATED FE CONTENT IS 20 percent.


Materials

Ore: Magnetite
Gangue: Amphibole
Gangue: Garnet
Gangue: Quartz
Gangue: Pyroxene


Comments

Comment (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.

Comment (Location): South central part of township in a cirque in the Clear Creek drainage at an elevation greater than 11,000 ft.

Comment (Location): 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.

Comment (Deposit): Deposit has never produced (comment moved from newMRDS 10303290=MAS 0560350014)

Comment (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]


References

Reference (Deposit): Harrer, 1966, Wyoming Iron-Ore Deposits: USBM IC-8315, p. 43.

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

Reference (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]

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


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