Structural position and petrogeochemistry features of dolerite dikes, Sukhoy Log-Techa zone, eastern segment of Ural orogenic belt to identify the environments of their formation

Abstract

Within Sukhoy Ljg-Techa zone of accretion-collision segment of the eastern periphery of the Urals dolerite and gabbro-dolerite dykes and sills are widespread among Upper Devonian-Low Carboniferous terrigenous and carbonate deposits. Geochemical data indicate that dolerites peculiar features of intraplate formations. Features of their structural position and dolerite petrogeochemical characteristics suggest that they formed at the stretch of composite continental crust with important role of large continental terraines.

Keywords

• дайки долеритов
• петрогеохимические характеристики
• композитная кора
• dolerite dikes
• petrogeochemical and isotope-geochemical characteristics
• composite crust