Timing of Accretion of the Malkhan-Konda Terrane (Western Transbaikal Region) to the Siberian Paleocontinent: Results of U-Pb Geochronological Studies of the Granitoids of the Malkhan Complex

摘要

The Western Transbaikal Region is situated between the Siberian craton and the Mongol-Okhotsk fold belt and comprises a lithotectonic complex that was formed by the interaction between the Siberian craton and the Mongol-Okhotsk paleo-ocean. This interaction lasted from the Late Riphean and ceased with the closure of the paleoocean, i.e., in the Early Mesozoic. Many events of geological evolution of this region remain poorly studied. In particular, this is the case of the Late Paleozoic epoch, which was manifested by wide magmatism and diverse geological processes. In this work, we attempted to justify the Carboniferous age of the accretion of the Malkhan-Konda terrane to the Siberian continent on the basis of geological and U-Pb geochronological studies of the granitoids of the Malkhan Complex.