Thermo-tectonic history of the Junggar Alatau within the Central Asian Orogenic Belt(SE Kazakhstan,NW China):Insights from integrated apatite U/Pb,fission track and(U-Th)/He thermochronology

作     者：S.Glorie A.Otasevic J.Gillespie G.Jepson M.Danisik F.I.Zhimulev D.Gurevich Z.Zhang D.Song W.Xiao 

作者机构：Department of Earth SciencesSchool of Physical SciencesThe University of AdelaideSA 5005Australia Department of GeosciencesUniversity of ArizonaTucsonAZUSA John de Laeter CentreTIGeRCurtin UniversityWA 6846Australia Sobolev Institute of Geology and MineralogySiberian Cransh of the Russian Academy of Sciences2 Pirogova St.Novosibirsk 630090Russia SRK ExplorationMoscowRussia State Key Laboratory of Lithospheric EvolutionInstitute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Xinjiang Research Centre for Mineral ResourcesXinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2019年第10卷第6期

页      面：2153-2166页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：supported by an Australian Research Council Discovery Project(DP150101730) the National Key R&D Program of China(2017YFC0601206) the National Natural Science Foundation of China(41888101) supported by the state assignment of IGM SB RAS 

主　　题：Junggar Central Asian Orogenic Belt Thermochronology Exhumation Fault reactivation Tethys 

摘      要：The Junggar Alatau forms the northern extent of the Tian Shan within the Central Asian Orogenic Belt(CAOB)at the border of SE Kazakhstan and NW *** study presents the Palaeozoic-Mesozoic post-collisional thermo-tectonic history of this frontier locality using an integrated approach based on three apatite geo-/thermochronometers:apatite U-Pb,fission track and(U-Th)/*** apatite U-Pb dates record Carboniferous-Permian post-magmatic cooling ages for the sampled granitoids,reflecting the progressive closure of the Palaeo-Asian *** apatite fission track(AFT)data record(partial)preservation of the late Palaeozoic cooling ages,supplemented by limited evidence for Late Triassic(~230-210 Ma)cooling and a more prominent record of(late)Early Cretaceous(~150-110 Ma)*** apatite(U-Th)/He age results are consistent with the(late)Early Cretaceous AFT data,revealing a period of fast cooling at that time in resulting thermal history *** Cretaceous rapid cooling signal is only observed for samples taken along the major NW-SE orientated shear zone that dissects the study area(the Central Kazakhstan Fault Zone),while Permian and Triassic cooling signals are preserved in low-relief areas,distal to this *** distinct geographical trend with respect to the shear zone,suggests that fault reactivation triggered the Cretaceous rapid cooling,which can be linked to a phase of slab-rollback and associated extension in the distant Tethys *** conclusions were drawn for thermochronology studies along other major NW-SE orientated shear zones in the Central Asian Orogenic Belt,suggesting a regional phase of Cretaceous exhumation in response to fault reactivation at that time.