The uplifting process of the Bogda Mountain during the Cenozoic and its tectonic implication

作     者：ZongXiu Wang Tao Li Jin Zhang YongQing Liu ZongJin Ma 

作者机构：Institute of Geomechanics Chinese Academy of Geological Sciences Beijing 100081 China Institute of Geology China Seismological Administration Beijing 100029 China Institute of Geology Chinese Academy of Geological Sciences Beijing 1 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2008年第51卷第4期

页      面：579-593页

核心收录：

学科分类：070904[理学-构造地质学] 0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：the National Basic Research Program of China (973 Program)(Grant No. 2007CB411305) National Science Foundation of China (Grant No. 40572116) National Project of Geological Survey (Grant No. 200113000078) 

主　　题：Bogda Mountain Chain re-orogeny uplifting thermochronology fission track 

摘      要：The Tianshan Mountains have undergone its initial orogeny, extension adjusting and re-orogeny since the Late Paleozoic. The re-orogeny and uplifting process of the orogeny in the Mesozoic and Cenozoic are two of most important events in the geological evolution of Euro-Asian continent, which resulted in the formation of the present range-and-basin pattern in topography of the Tianshan Mountains and its adjacent areas. Thermochronology results by the method of fission-track dating of apatite suggest three obvious uplifting stages of the Bogad Mountain Chain re-orogeny during the Cenozoic, i.e. 5.6-19 Ma, 20-30 Ma, and 42-47 Ma. The strongest uplifting stage of the mountain is the second one at 20 -30 Ma, when the mountain uplifted as a whole, and the beginning of re-orogeny was no less than 65 Ma. Furthermore, our studies also show that the uplifting types of the mountain are variable in the dif-ferent time periods, including uplifting of mountain as a whole and differential uplifting. The apparently diversified uplifting processes of the mountain chain are characterized by the migration (or transfor-mation) of the uplifting direction of the mountain from west to east and from north to south, and the main process of mountain extending is from north to south.