New U-Pb isotopic data on the age of metamorphic and igneous rocks of the western margin of the Selenga-Stanovoi orogenic belt

作者:Vakh A S*; Avchenko O V; Goryachev N A; Gvozdev V I; Kiselev V I; Khomich V G; Yang Yanchen; Ye Songqing; Zhang Guobin
来源:Doklady Earth Sciences, 2013, 450(2): 575-582.
DOI:10.1134/S1028334X1306007X

摘要

New data on the isotopic age of zircons from metamorphic and igneous rocks are given for the Berezitovoe and Kirovskoe deposits located in the eastern margin of the Selenga-Stanovoi orogenic belt. The zircons were studied with the LA-ICP-MS method in the State Key Laboratory of Continental Dynamics, Northwestern University, Sian, Shansi province, People's Republic of China. The results allowed us to reveal three age epochs in formation of the eastern part of the Selenga-Stanovoi orogenic belt (1.87 Ga; 380-330 Ma; 138-125 Ma), which have significant importance for understanding of the geological structure of the south-eastern framework of the North Asian craton.