Genesis of High-Magnesium Volcanic Rocks of the Paleoproterozoic Vetrennyi Belt (Eastern Karelia): Evidence from the Study of U—Pb and Lu—Hf Systems in Zircons

摘要

High-magnesium low-titanium volcanic rocks are widely abundant within the most ancient Kola—Lapland—Karelian province of the Baltic Shield, in the lower parts of sections of the Paleoproterozoic structures (Imandra—Varzugskaya, Vetrennyi Belt, Kittel', and others). Their origin is a subject of lasting discussions [3, 8, 10].