SHRIMP ages of Kayakedengtage complex in the East Kunlun Mountains and their geological implications

Kayakedengtage complex, located in southeastern Qimantage Mountain of the East Kunlun Mountains, consists of gabbro, diorite, quartz diorite, granodiorite, adamellite and syenogranite which are products of a typical magmatic mixing process. The SHRIMP dating of gabbro and adamellite samples yielded magmatic ages of 403.3±7.2 Ma and 394±13 Ma and inherited zircon age of 1?116 Ma. The morphological features of zircons from gabbro and adamellite indicate that the zircon crystallization temperatures of these two rocks are 850～900℃ and 600～850℃, respectively, which implies the formation depth of the complex. The dating results provide important data for the evolutionary history of the East Kunlun orogenic belt.