Mine detail: Browns Lake Mine

Previously called 'Ivanhoe'

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Location

Lat / long:

45.51601, -112.82478

Resource(M)

Primary:	Tungsten
Secondary:	Copper
Tertiary:	Molybdenum
Ore:	Bornite, Chalcopyrite, Covellite, Malachite, Powellite, Pyrrhotite, Scheelite
Gangue:	Biotite, Epidote, Limonite, Magnetite, Pyrite
Orebody form:	TABULAR AND IRREGULAR

Production

Operation type:	Unknown
Deposit type:	Contact Metasomatic
Production size:	Yes
Development status:	Past Producer
First production started:	1953

Geology

Host rock:	Amsden
Host type:	Limestone
Associated rock:	Quartz Monzonite;Granodiorite
Associated type:	Quartz Monzonite,Diorite
Structure:	Pioneer Batholith
Alteration processes:	Chloritization, Oxidation, Skarn

References

MRDS	M060802
DEP	10042779
Reference	{Deposit:: PATTEE, E.C., 1960, TUNGSTEN RES. OF MONT.-MT. TORREY BATHOLITH, BEAVERHEAD CO., MONT.: U.S. BUREAU OF MINES, REPT. INV. 5552, P. 6-8, MAPS.}{Deposit:: MBMG BULL 85, P. 124-127.}{Deposit:: DMEA 1951X, DMEA 2292, DMA-148}{Production:: DMEA FILES}
Reporter	Unknown, Loen, Jeffrey S. (Pearson, Robert C.)