Mine detail: Norwich Mine

Previously called ''

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Location

Lat / long:

46.01879, -112.58006

Resource(M)

Primary:	Manganese
Tertiary:	Lead, Zinc, Silver, Molybdenum, Gold, Copper
Ore:	Galena, Molybdenite, Rhodochrosite, Sphalerite
Gangue:	Pyrite, Quartz, Tourmaline
Orebody form:	IRREGULAR

Production

Operation type:	Unknown
Production size:	Small
Development status:	Past Producer

Geology

Structure:	Boulder Batholith, One Major Cross Fault, East - West Fault System, Northwest Fault System, Northeast Fault System
Alteration processes:	Sericitization, Chloritization, Minor Silicification, Pyritization

References

MRDS	W026571
DEP	10078302
Reference	{Deposit:: HO, AU - N60C, 1957 , GEOLOGY AND ORE DEPOSITS OF THE NORWICH MINE, SILVER BOW COUNTY, MONTANA, MASTERS THESIS, MONTANA SCHOOL OF MINES (MONTANA TECH). VOLS. 1 AND 2}{Deposit:: COLE, J. W., 1951 , INVESTIGATION OF THE NORWICH MANGANESE DEPOSIT, SILVER BOW COUNTY, MONT: U. S. BUREAU OF MINES REPORT OF INVESTIGATIONS 4784 , 14 P.}{Deposit:: COLE, J.W., 1951, INVESTIGATION OF THE NORWICH MANGANESE DEPOSIT, SILVER BOW COUNTY, MONTANA: U.S. BUREAU OF MINES REPORT OF INVESTIGATION NO. 4784, 14 P.}{Deposit:: 1951 DIREXPL U. S. BUREAU OF MINE}
Reporter	Mc Kenzie, Craig L.; R. B. Berg