us geological survey minerals information 1996 1 zinc by jozef plachy in domestic mine production declined mor e metal 90 of which is either high grade or prime wester n than 2 z inc was extracted from 23 mines 8 states see tables and 3 during the year four ceased one reactivated for sixth consecutive alaska wa s leading mining state followed tennessee new york missouri montana min greatl y exceeded smelter capacity resulting more two thirds concentrate being exported mainly to c anada based on recoverable content averag annual price value 600 million 996 three primar smelte rs refineries a small amount o f imported about lower that 1995 table 4 imbalance between sme lter may be partially redressed planne d cap acity increases at clarksville tn sauget il smelters app arent consumption decreased slightly imports