Background: Qimantage is an important tectonic metallogenic belt in western part of East Kunlun Mountain. It has experienced complex geological evolution

and significant mineralization. However

because of the plateau climate and inaccessibility

fewer research works have been done on this area

especially after Indo-sinian epoch. Purpose: Our work is to research tectonic activity

thermal history and uplifting around Bayinguole river in Qimantage belt. Methods: The apatite fission-track method was applied to research the tectonic setting

simulate the thermal history and calculate the uplift size and uplift speed. Results: A series of apatite fission track ages from granitoid samples in Bayinguole area of Eastern Kunlun Mountain were obtained

ranging from 120 Ma to 47 Ma that might be divided into three groups: 120?100 Ma

67 Ma and 54?47 Ma. These ages reflected tectonic events in this area very well. Conclusions: The 120?100 Ma and 67 Ma ages present collision-convergences of Gangdese terrane and Himalayan terrane with their north-side terranes in Early Cretaceous and Late Cretaceous respectively. The ages of 54?47 Ma reflect post-orogenic stretching events in Eocene. Three stages of thermal evolution history are revealed by apatite fission track modeling in this area. Stage one 180?140 Ma is in the bottom temperature of apatite fission track anneal zone. Stage two 140?13 Ma records slow cooling. The last stage after 13 Ma records rapid cooling with temperature dropped 50 oC. The uplifting ranges for these three stages are 1.0 km

0.6 km and 1.4 km

respectively. The cumulative amount of uplift is about 3.0 km. The formular calculations for the 3 samples have their rock uplifts of 3623 m

3317 m and 3769 m

respectively

averaging 3570 m

in accordance with the results based on the 3 stage thermal history.Cited