Apatite fission track thermochronology in the Kuluketage and Aksu areas,NW China:Implication for tectonic evolution of the northern Tarim  

作　　者：Zhiyong Zhang Wenbin Zhu Dewen Zheng Bihai Zheng Wei Yang 

机构地区：[1]State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences [2]State Key Laboratory for Mineral Deposits Research,Department of Earth Sciences,Nanjing University [3]State Key Laboratory of Earthquake Dynamics,Institute of Geology China Earthquake Administration

出　　处：《Geoscience Frontiers》2016年第2期171-180,共10页地学前缘（英文版）

基　　金：financially supported by 973 Program(Grant No. 2014CB440801);NSFC(Grant Nos.41230207 and 41302167);China Postdoctoral Council(Grant Nos.20100480452,2012T50135 and International Postdoctoral Exchange Fellowship);State Key Laboratory of Earthquake Dynamics(Grant No.LED2013B03)

摘　　要：Tarim Precambrian bedrocks are well exposed in the Kuluketage and Aksu areas, where twenty four samples were taken to reveal the denudation history of the northern Tarim Craton. Apatite fission track dating and thermal history modeling suggest that the northern Tarim experienced multi-stage cooling events which were assumed to be associated with the distant effects of the Cimmerian orogeny and India-Eurasia collision in the past. But the first episode of exhumation in the northern Tarim, occurring in the mid-Permian to Triassic, is here suggested to be induced by docking of the Tarim Craton and final amalgamation of the Central Asian Orogenic Belt. The cooling event at ca. 170 Ma may be triggered by the Qiangtang-Eurasia collision. Widespread Cretaceous exhumation could be linked with docking of the Lhasa terrane in the late Jurassic. Cenozoic reheating and recooling likely occurred because of the northpropagating stress, however, this has not affected the northern Tarim much because the Tarim is characterized by rigid block-like motion.Tarim Precambrian bedrocks are well exposed in the Kuluketage and Aksu areas, where twenty four samples were taken to reveal the denudation history of the northern Tarim Craton. Apatite fission track dating and thermal history modeling suggest that the northern Tarim experienced multi-stage cooling events which were assumed to be associated with the distant effects of the Cimmerian orogeny and India-Eurasia collision in the past. But the first episode of exhumation in the northern Tarim, occurring in the mid-Permian to Triassic, is here suggested to be induced by docking of the Tarim Craton and final amalgamation of the Central Asian Orogenic Belt. The cooling event at ca. 170 Ma may be triggered by the Qiangtang-Eurasia collision. Widespread Cretaceous exhumation could be linked with docking of the Lhasa terrane in the late Jurassic. Cenozoic reheating and recooling likely occurred because of the northpropagating stress, however, this has not affected the northern Tarim much because the Tarim is characterized by rigid block-like motion.

关 键 词：Tarim Craton The Kuluketage area Aksu Precambrian blueschist Apatite fission track Thermo-tectonic evolution 

分 类 号：P542[天文地球—构造地质学]