Mineralogical and Geochemical Features of Basaltic Magmatism in the Lower Riphean East-European Platform

Abstract

Annotation. The article presents the results of the study basalts of the Norkinskaya Formation of the Lower Riphean, uncovered by a borehole 203 Menzelino-Aktanyshs. The mineralogical and geochemical composition of basalts of the Aktanysh complex. Formulas set rock-forming, ore and accessory minerals. Among accessory sites, baddeleyite was noted for the first time -a reliable geochronometer Keywords. Basalts, Lower Riphean, East-European, platform По результатам изотопного датирования магматических событий на востоке Русской плиты выявлены новые событийно стратиграфические уровни -актанышский (нижний рифей),