Early Triassic Monzonite–Granite Series in Eastern Kazakhstan as a Reflection of Siberian Large Igneous Province Activity

We provide the results of studying internal structure and composition rocks Semeitau Delbegetei massifs located in Eastern Kazakhstan. It was previously believed that these have different ages were formed geodynamic settings. The U-Pb zircon age from monzonites quartz determined to be 249 ± 2 Ma, which showed same Early Triassic massifs. Both are composed monzonite–granite series with a significant proportion high-silica (leucocratic granites). Intermediate due differentiation subalkaline mafic magmas, felsic (rhyolites granites) result partial melting crustal substrates. massif formation model assumes intrusion magmas into crust, their mixing melts, then various upper levels. Analysis geological position, allows us conclude an intraplate setting. activity mantle plume is most probable reason for formation. can included southern part range Siberian Large Igneous Province.