Behavior of selenium and sulfur in Svecokarelian sulfide-rich rocks

Abstract

Selenium content is high and the S/Se ratio low in the economically most important sulfide ores which are situated in the Svecokarelian schist belt. The S/Se ratio is like that in Middle Precambrian (1.4–2.5 Ga) Svecokarelian carbonaceous and argillaceous schists, indicating that the sulfides originated in those schists and, after sedimentation, were separated from them by metamorphic and magmatic processes.