U-Pb (SHRIMP-Ⅱ) Isotope Dating of Zircons from Metamorphic Rocks of Southwestern Transbaikalia

摘要

Multiage plutonic, volcanoplutonic formations, and rocks of sedimentary basins are distinguished within the Mongolia-Okhotskii foldbelt (MOFB). Many problems of the formation of this belt have not yet been solved, which is mainly explained by the deficiency of geochronological and isotope geochemical data. In particular, information on the age of metamorphic rocks distinguished in its structure is insufficient.