Black Butte Iron

The Black Butte Iron is a iron mine located in Madison county, Montana at an elevation of 7,999 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

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Black Butte Iron
Secondary: Standard Creek

Commodity

Primary: Iron

Location

State: Montana
County: Madison
District: Unorganized

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.

Holdings

Not available

Workings

Not available

Ownership

Owner Name: U.S. Steel Corp

Owner Name: U.S. Steel Corp

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Year: 1957
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: M

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Gravelly Range

Mineral Deposit Model

Not available

Orebody

Form: TABULAR

Structure

Type: R
Description: On East Side Of Gravelly Syncline

Alterations

Alteration Type: L
Alteration Text: None

Rocks

Name: Iron Formation
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic

Name: Iron Formation
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic

Analytical Data

Not available

Materials

Ore: Magnetite
Ore: Hematite
Gangue: Hornblende
Gangue: Quartz

Comments

Comment (Commodity): GRADE RANGES BETWEEN 25 AND 35 PERCENT FE

Comment (Location): SECTION CORNERS NOT LOCATED - SECTION ESTIMATED

Comment (Reserve-Resource): THE CORE DRILLING BY U. S. STEEL ESTIMATES 90 MILLION TONS OF ORE TO 300 FT DEPTH.

Comment (Deposit): CORE DRILLING PROGRAM ACTIVE FROM 1971 TO 1975. U. S. STEEL APPLIED FOR PATENT ON A NUMBER OF LOCATED CLAIMS

Comment (Workings): TWO OR MORE PARALLEL ORE HORIZONS OVER A MILE IN LENGTH AND 100 FT WIDE ARE DEVELOPED BY CORE DRILLING

References

Reference (Deposit): BAYLEY R. W. & JAMES, H. L., 1973 , PRECAMBRIAN IRON FORMATIONS OF THE UNITED STATES: ECON. GEOL. V. 68 , NO. 7

Reference (Deposit): 1965 GEOLMAP H. L. JAMES & K. L. WEIR GEOL. MAP (OPEN FILE)

Reference (Deposit): CARR, M. S., GUILD, P. W., AND WRIGHT, W. B., 1967 , IRON IN THE UNITED STATES: USGS MR 51 WITH SECTION ON PRECAMBRIAN IRON FORMATIONS IN US BY BAYLEY, R. W., AND JAMES, H. L.

Reference (Deposit): 1967 COMPILE CARR. GUILD & WRIGHT (BAYLEY & JAMES, PUB. REPORT

Reference (Deposit): 1969 COMPILE MBMG UNPUBLISHED SUMMARY REPORT

Reference (Deposit): USGS OPEN FILE REPORT, PRELIMINARY GEOLOGIC MAP OF BLACK BUTTE IRON DEPOSIT, 1965; SUMMARY OF INFORMATION ON IRON ORE, BITUMINOUS COAL, FLUORITE, & CHROMITE, MBMG UNPUBLISHED SUMMARY

Principal Gold Districts of Montana

In Montana, 54 mining districts have each have produced more than 10,000 ounces of gold. The largest producers are Butte, Helena, Marysville, and Virginia City, each having produced more than one million ounces. Twenty seven other districts are each credited with between 100,000 and one million ounces of gold production. Read more: Principal Gold Districts of Montana.