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
Elevation: 11,001 Feet (3,353 Meters)
Commodity: Iron
Lat, Long: 43.30833, -109.70417
Map: View on Google Maps
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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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