The Oldest Granitoids in the Transangara Region of the Yenisei Ridge: U-Th-Pb Data on Zircon

摘要

The Yenisei Ridge is a Precambrian fold-thrust belt that formed as a result of successive accretion of various terranes at the western margin of the Siberian Cra-ton in the Neoproterozoic [1]. In many respects, this region has key implications, not only for understanding of the Precambrian tectonic evolution of the Siberian Craton, but also for global paleotectonic reconstructions. In particular, based on previously published geo-chronological data concerning the Teya granite-gneiss complex [2], the problem of Grenville collision events (1100-1000 Ma ago) has been repeatedly discussed in the literature in the context of Meso- and Neoproterozoic Rodinia supercontinent formation.