老挝东北部二叠纪长英质岩石年代学及地球化学限定及其古特提斯构造意义

摘要

New zircon geochronological,petrologic,elemental and Sr-Nd-Hf isotopic data for the felsic igneous rocks from the Truong Son zone in NE Laos constrain the temporal-spatial relationship with the SW China and the Paleotethyan tectonic evolution in SE Asia.Geochronological data show that the felsic rocks in NE Laos yield crystallization ages of281-265Ma and can be divided into three groups.