... pyrrhotite, and anhydrite, also influences metal contents: most deposits are related to oxidized, magnetite-series plutons, but some Sn and Mo deposits are related to reduced, ilmenite-series plutons.Distribution ... of Zn and Pb sulfides (spha lerite and galena) and theyusually contain economically important amounts of Ag. The Zn and Pb sulfides areinterbedded with iron sulfides (pyrite and pyrrhotite) and ... The fine banding is verysimilar to sedimentary bedding and this, together with other features of theores and their geological setting led Stanton, an influential Australian geolo-gist, to propose...