Mine detail: Big Ben Molybdenum

Previously called ''

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Location

Lat / long:

46.96574, -110.71306

Resource(M)

Primary:	Molybdenum
Tertiary:	Copper, Tungsten, Lead
Ore:	Chalcopyrite, Galena, Molybdenite, Molybdite
Gangue:	Fluorite, Quartz
Orebody form:	IRREGULAR
Discovery year:	1922

Production

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

Geology

Host rock:	Gneisses And Schists
Host type:	Gneiss
Structure:	Little Belt Mountains Are A Broad East - West Arch, Significant Intrusion By Porphyries And Diorites
Alteration processes:	Some Silicification Of Country Rock

References

MRDS	W026530
DEP	10096465
Reference	{Deposit:: HERDLICK, J. A., 1949 , INVESTIGATION OF THE BIG BEN MOLYBDENUM DEPOSIT, NEIHART DISTRICT, CASCADE, MONT; US BUREAU OF MINES REPT. OF INV. 4406}{Deposit:: ROBERTSON, A. F., 1951 , MINES AND MINERAL DEPOSITS (EXCEPT FUELS) CASCADE COUNTY, MONTANA, U. S. BUREAU OF MINES INFO. CIRCULAR 7589 P 59 - 61}{Deposit:: SCHAFER, P. A., 1935 , GEOLOGY AND ORE DEPOSITS OF THE NEIHART MINING DISTRICT, CASCADE COUNTY, MONTANA, MONT. BUREAU OF MINES AND GEOL. MEMOIR NO. 13 P. 56 - 57}{Deposit:: CREASEY, S.C., SCHOLZ, E.A., 1944, BIG BEN MOLYBDENUM DEPOSIT, NEIHART MINING DISTRICT, CASCADE COUNTY: MONTANA GEOLOGICAL SOCIETY PRELIMINARY REPORT, P. 29.}{Deposit:: 1943 DIREXPL BUREAU OF MINE}
Reporter	Mc Kenzie, Craig L.; R. B. Berg