Montana · Lincoln County
Past Producer

Big Eight Mine

Lincoln County, Montana, United States
LeadZincSilverCopperGoldCobalt
⌖ Show on mapUSGS source ↗
Commodities
PrimaryLead, Zinc
SecondarySilver, Copper, Gold
TertiaryCobalt
Commodity typeM
Deposit
Deposit sizeY
Ore controlSnowstorm Dike, Spar Lake Syncline, May Be Related To Dry Creek Stock
Materials
Ore mineralsChalcopyrite, Galena, Pyrite, Pyrrhotite, Sphalerite
GangueActinolite, Calcite, Chlorite, Garnet
Geology
Host rockDiorite,Quartzite · Prichard Formation, Argillite, & Quartzite
Associated rockQuartz Monzonite,Diorite · Snowstorm Dike, Metadiorite;Dry Creek Stock, Quartz Monzonite
StructureSpar Lake Syncline, Leonia Fault, Local Post-Ore Fault Striking Nw, Dipping 25 Deg Ne Displaced Major Vein To Nw
Tectonic settingCordilleran Miogeosyncline
Economic & production
Development statusPast Producer
Discovery year1925
Identification
Deposit ID10071388
MRDS IDW014735
Alternate namesCabinet Lease
RegionNA
Data scoreB
Coordinates48.43737, -115.99243
References
JOHNS, W. M., 1970, GEOLOGY & MINERAL DEPOSITS - LINCOLN & FLATHEAD CO, MT. BUREAU MINES & GEOLOGY BULL. 79.GIBSON, R., 1948, GEOLOGY & ORE DEPOSITS - LIBBY QUADRANGLE, U.S. GEOLOGICAL SURVEY 956.JOHNS, 1970, MBMG BULL. 79.