A-Type Granite Formation in the Yenisei Ridge in the Cryogenian Period during the Tectonic Transformation of the Region (Southwestern Framing of the Siberian Craton)

We consider the evolution of A-type granite magmatism in the Cryogenian period during a tectonic transition of the Yenisei Ridge from its postcollisional state to the early development stages of an active continental margin. New geochronological and geochemical data are reported for A-type granites of two intrusions – the Strelka pluton belonging to the postcollisional Glushikha complex (752–718 Ma) and the Yagodka pluton of the Tatarka complex that formed on the active continental margin (711–629 Ma). New U–Pb and Ar/Ar geochronological data for these intrusions indicate that the time intervals for these two complexes overlap, showing the unbroken evolution of A-type magmatism during the tectonic transformation of the region.