The formation and subsequent alteration of iron, manganese and sulfide skarn ores in the Supracrustal Series involve: (1) late Initial Rift Stage exhalative-sedimentary processes possibly related to ascending granitic magma, (2) early Rift Stage exhalative-sedimentary and seafloor hydrothermal processes related to basic volcanism and intrusion and subvolcanic granite intrusion, (3) late Rift Stage hydrothermal metasomatic alteration and mineralization around subvolcanic granites, (4) Post-rift Stage deformation and metamorphism, (5) Post-rift Stage post-deformation recrystallization and skarn formation related to Hyttsjö diorites, and (6) post-Supracrustal Series metamorphic modifications.
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