Schist belt of Tipasjärvi in the parish of Sotkamo, Finland

Abstract

The basement complex of eastern Finland near the schist belt of Tipasjärvi, the rocks of the schist area (arenites, argillites, amphibolites and ultrabasic rocks), the late kinematic granites and the dikes of the Tipasjärvi district are described. The tectonics of the schist belt is described and the position of the schist area in the evolution of the bedrock in eastern Finland is discussed. It is suggested that the schist belt of Tipasjärvi might be a part of the formations deposited on the basement but which are older than the Karelian (Sariolan, Jatulian, Kalevian) formations. Other schist areas of the same age are, perhaps, those of Kuhmo—Suomussalmi and Ilomantsi.