Sources and possible causes of Paleoproterozoic magmatism in the southern part of the Karelian Craton (Baltic Shield)

Abstract

There is an opinion that Paleoproterozoic magmatism in the Karelian craton of the Baltic Shield is linked solely with the influence of mantle plumes. On the basis of petrogeochemicaldata on magmatic formations from local geological sections in the southern part of the Karelian Craton, the author infers a similar mantle source for magmatic rocks of all Paleoproterozoic age levels, from Sumian to Ludikovian. The melting that occurred in the lithospheric mantle rules out the plume source for the considered Paleoproterozoic magmatic formations.

Keywords

• внутриплитный магматизм
• плюм
• палеопротерозой
• литосфера, астеносфера