Uplift Of The West Kunlun Mountain In The Cenozoic And Comparison To Adjacent Tectonics

West Kunlun Mt is always hot area to oversea and Chinese geologists and geographer , because of the special tectonic. Studying the uplift of West Kunlun has important significance to reveal the uplift of the Tibetan Plateau and The formation and evolution of Tarim Basin. Apatite fission track (FT) is a very effective tool of the most methods in the research of mountain body uplift.This paper is based on FT theory to analysis on fission track age and fission track length in different area of West Kunlun Mt since Cenozoic era and to calculate the uplift rate by the Fission Track Ages- Height Difference method and Extrapolation method and compare the uplift process to adjacent tectonic unit.The results of apatite fission track show that West Kunlun Mt experienced large uplifting since Oligocene. The uplift rate shows that the West Kunlun has different uplift stages: quite slow uplift stage (15-5Ma);faster uplift stage(5-3Ma); accelerated uplift stage(3Ma-now). Different areas have different uplift rate in the West Kunlun Mt. The results shows that the uplift rate in west section was larger than that in middle section. The uplift of West Kunlun Mt is a long heterogeneous process , which has the character of integrity, stage and difference in time and space since Cenozoic era by apatite fission track analysis.The comparison study of the uplift process between the West Kunlun Mt and adjacent tectonic unit shows that the West Kunlun Mt and the Altun Mountains have similar uplift process, but different uplift rate since late Cenozoic, uplift rate in the West Kunlun is higher than that in Altun. The West Kunlun, which situated on the northwest of Qinhai-Tibet Plateau, has different uplift process with the East Kunlun which situated internal Qinhai-Tibet platea and uplift rate in West Kunlun is much higher than that in East Kunlun because it's supported by the evidence of FT, river terrace and GPS. Compare to the Himalaya located in the Qinghai-Tibet Plateau southern margin shows that the uplift rate of West Kunlun is slower than the contemporaneous that of Himalay especially since Late Pliocene (2Ma). View from the whole the range of Qinghai-Tibet Plateau , the uplift rate is more and more slower from south to north in general, which illustrates the time-order and difference of the far field effect of collision of the Indian and the Eurasian Plate.