摘要
Kekusayi series of quartz syenite porphyries in Wusun mountain region, West Tianshan, Xinjiang, which produced as warty and dike type, is mainly intruded into the strata of Early Carboniferous, Dahalajunshan formation. U-Pb isotope dating zircons from Kekusayi quartz syenite porphyry are determined by LA-ICP-MS and yield a zircon U-Pb age of (314.4 ± 3.7) Ma (MSWD=0.51), which indicates that the formation age should be Late Carboniferous. This paper provides a geochronology evidence for discussing the magmatism and tectonic-environment of this region.