New data on mineralogy of volcanic-hosted massive sulfide deposits in the Urals

Abstract

The study of mode of occurrence of Au, Ag, Bi, Se and Te covers a row of giant VMS deposits of the Urals (Uralian or Cu-Zn-pyritic type): nondeformed Safyanovsk, altered by late hydrothermal processes Uzelginsk, intensively deformed Gay and Uchaly and a few small polymetallic and Cu-Co deposits.