Mine detail: Montana Prospect

Previously called ''

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Location

Lat / long:

44.55706, -117.0174

Resource(M)

Tertiary:	Copper, Iron
Ore:	Chalcopyrite, Hematite, Magnetite
Gangue:	Garnet, Limonite, Pyrite, Quartz
Orebody form:	LENS, TABULAR , BLANKET
Discovery year:	1897

Production

Operation type:	Unknown
Production size:	None
Development status:	Occurrence

Geology

Host rock:	Martin Bridge Formation-Marble
Host type:	Greenstone
Associated rock:	Andesite Flows;Granite Or Granodiorite;Perm-Tri
Associated type:	Diorite,Greenstone,Andesite
Structure:	High - Angle Faulting With Westward Tilting Of The Fault Blocks.
Tectonic:	Island Arc
Alteration processes:	Cavities In Magnetite Due To Leaching Of Sulfides.

References

MRDS	W012999
DEP	10090085
Reference	{Deposit:: BELL, R. N., 1918, NINETEENTH ANNUAL REPORT OF THE MINING INDUSTRY OF IDAHO FOR THE YEAR 1917, P. 98.}{Deposit:: MACKIN, J. H., 1953, IRON ORE DEPOSITS OF THE IRON MTN. DISTRICT, IDAHO: U.S. GEOLOGICAL SURVEY BULL. 982 - E, 30 P.}{Deposit:: MACKIN, J.H., 1947 , IRON ORE DEPOSITS OF THE IRON MOUNTAIN DISTRICT, WASHINGTON COUNTY, IDAHO: USGS OPEN-FILE REPT., 23 P.}{Deposit:: 1918 COMPILE 19TH ANN. REPT. OF THE MINING INDUSTRY FOR 1917}{Deposit:: 1947 RECON MACKIN, J.H., OPEN-FILE REPT.}{Deposit:: 1953 GEOLMAP MACKIN, J.H., BULL. 982-E}
Reporter	Nakai, Terry L.; Miller, Pat