U-Pb (SHRIMP-II) isotope dating of zircons from alkali rocks of Vitim province,West Transbaikalia |
| |
Authors: | A. G. Doroshkevich G. S. Ripp S. A. Sergeev |
| |
Affiliation: | 1.Geological Institute, Siberian Branch,Russian Academy of Sciences,Ulan-Ude,Russia;2.Karpinskii All-Russia Geologic Institute,St. Petersburg,Russia |
| |
Abstract: | A U-Pb (SHRIMP-II) geochronological study of rocks from the Sayzhenski, Snezhny and Nizhne-Burulzayski massifs, incorporated into the Vitim alkali province (Sayzhenski Complex) has been made. The acquired data indicate that the rocks formed in the interval of 520-486 Ma. The proximity of their age to accretionary-collision processes in the Central Asian fold belt, accompanied by intràplate magmatism, has been noted. Two independent stages in the evolution of Vitim Province magmatism are suggested: Early Paleozoic (520-485 Ma) and Late Paleozoic (350-290 Ma). |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|