Iron Mountain Mine

The Iron Mountain Mine is a iron, titanium, metal, and vanadium mine located in Fremont county, Colorado at an elevation of 7,178 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

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Site Name

Primary: Iron Mountain Mine
Secondary: Iron Mountain Deposit
Secondary: Iron Mountain Titaniferous Magnetite Deposit
Secondary: Iron Mountain District

Commodity

Primary: Iron
Primary: Titanium, Metal
Primary: Vanadium

Location

State: Colorado
County: Fremont
District: Iron Mountain District

Land Status

Land ownership: Private
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.

Holdings

Not available

Workings

Not available

Ownership

Owner Name: Ellison Family
Years: 1959 -

Owner Name: Poston, A.
Years: 1957 -

Production

Year: 1956
Time Period: 1955-1956
Mined: 34447.000 mt
Material type: Heavy aggregate
Description: Cp_Grade: ^48-50% Fe, 13.5-14.1% T102
Year: 1870
Time Period: 1872-1956
Mined: 984.200 mt
Material type: Iron ore
Description: Cp_Grade: ^48-50% Fe,

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Surface
Year First Production: 1873
Discovery Year: 1872
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

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

Mineral Deposit Model

Model Name: Anorthosite Ti

Orebody

Form: LENS-SHAPED MASSES IN FUNNEL-SHAPED BODY

Structure

Type: R
Description: Northern Wet Mountains, Deweese Plateau; Mcclure Mountain Complex

Type: L
Description: Wnw-Trending Faults, Nnw-Trending Fault

Alterations

Not available

Rocks

Name: Gabbro
Role: Associated
Age Type: Associated Rock Unit
Age Young: Late Cambrian

Analytical Data

Analytical Data: 5 ORE SAMPLES SHOWED 48-50% FE, 13.5-14.1% T102

Materials

Ore: Ilmenite
Ore: Magnetite
Gangue: Sericite
Gangue: Quartz
Gangue: Plagioclase
Gangue: Olivine
Gangue: Limonite
Gangue: Hornblende
Gangue: Biotite
Gangue: Augite
Gangue: Spinel

Comments

Comment (Development): CLAIMS PATENTED IN 1872

Comment (Geology): IGNEOUS ANORTHOSITE-NORITE LAYERED STRUCTURE IN HOST ROCK ACCOMPANIES AND SUBPARALLELS MAGNETITE LENSES

Comment (Deposit): DESCRIPTIONS APPLY TO A SERIES OF MAGNETITE LENSES, OF WHICH OUTCROPS HAVE BEEN MAPPED ALONG A 2200-FT ARC; INDIVIDUAL ORE BODIES ARE SMALL, DISCON TINUOUS, IN A LAYERED MAFIC-ULTRAMAFIC MATRIX; ADDITIONAL MAGNETITE LENSES MAY BE PRESENT AT DEPTH

Comment (Location): DEPOSIT ALSO EXTENDS TO SECTIONS 2, 4, 9, 10; ON DEWEESE PLATEAU, SSE OF IRON MOUNTAIN, NW OF PINE CREEK ; INFO FROM LAND.ST :(1976)

Comment (Commodity): ORE USED FOR IRON WORKS AND HEAVY AGGREGATE

Comment (Reserve-Resource): RESERVES SMALL, WITH ABOUT 45-50% FE, 0-14% T102, 0.41-0.45% V205

Comment (Workings): PITS, OPEN CUTS, SHAFT

Comment (Production): ORE PRODUCED IN 1870'S WAS USED AS IRON ORE AND STEEL MILL FLUX; LATER ORE WITH SPECIFIC GRAVITY OF 4.25 WAS GROUND TO 0.25 INCH DIAMETER FOR USE AS HEAVY AGGREGATE FOR JUBMARINE CONCRETE PIPELINE COATINGS

Comment (Deposit): IN 1948 A DIP NEEDLE SURVEY WAS DONE BY USBM; IN 1958 A GRID SURVEY WITH GRAVITY AND MAGNETIC OBSERVATIONS WAS RUN. TOTAL TONNAGE AT THIS DEPOSIT IS PROBABLY NOT LARGE; TRANSPORTATION COSTS FOR PRODUCTION WOULD BE HEAVY ; INFO.SRC : 1 PUB LIT

References

Reference (Geology): Armbrustmacher, T.J., 1984, Alkaline rock complexes in the Wet Mountains area, Custer and Fremont counties, Colorado: U.S. Geological Survey Professional Paper 1269, 33 p.

Reference (Deposit): SHAWE, D.R. AND PARKER, R.L., 1967, MAFIC-ULTRAMAFIC LAYERED INTRUSION AT IRON MOUNTAIN, FREMONT COUNTY, COLORADO: USGS BULLETIN 1251-A, 28 P., PLATES.

Reference (Deposit): HARRER, C.M. AND TESCH, W.J., 1958, RECONNAISSANCE OF IRON OCCURRENCES IN COLORADO: USBM INFORMATION CIRCULAR 7918, P. 5, 29-30.

Reference (Geology): Armbrustmacher, T.J., 1988, Geology and resources of thorium and associated elements in the Wet Mountains area, Fremont and Custer counties, Colorado: U.S. Geological Survey Professional Paper 1049-F, 34 p.

Reference (Deposit): SINGEWALD, J.T., JR., 1913, THE TITANIFEROUS IRON ORES IN THE UNITED STATES - THEIR COMPOSITION AND ECONOMIC VALUE: USBM BULLETIN 64, P. 145.

Reference (Deposit): TAYLOR, R. B., SCOTT, G. R., WOBUS, R. A., EPIS, R. C., 1975, RECONNAISSANCE GEOLOGIC MAP OF THE ROYAL GORGE QUADRANGLE, FREMONT AND CUSTER COUNTIES, COLORADO: USGS MAP I-869, 1:62,500.

Reference (Deposit): Cappa, J. A., 1998, Alkalic igneous rocks of Colorado and their associated ore deposits: Colorado Geological Survey Resource Series 35, 138 p.

Reference (Production): HARRER, C.M., 1958; BECKER, R.M., 1961;

Reference (Deposit): BECKER, R.M., SHANNON, S.S., JR., ROSE, C.K., 1961, IRON MOUNTAIN TITANIFEROUS MAGNETITE DEPOSIT, FREMONT COUNTY, COLORADO: USBM REPORT OF INVESTIGATIONS 5864, 18 P., PLATES.

Colorado Mining Photos

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