Abstract
This study conducted geochronological study of metapelites from the Zavkhan, Tarvagatay, Baydrag and Ereendavaa areas. The research focused on field investigations with U-Th-Pb monazite age dating by FE-EPMA and U-Pb zircon age dating by LA-ICP-MS to understand following timing of metamorphism and detrital zircon provenance from all terranes. These results allow us to realize the similarity and differences of the origin of the metamorphic rocks and to compare with other neighboring terranes such Tuva-Mongolia terrane and Siberia, Tarim and North China cratons.