A palaeoearthquake event and its age revealed by the travertine layer along the Litang fault in the southeastern margin of the Qinghai-Tibetan plateau

作     者：Yao Yang Mingjian Liang Chao Ma Jun Li Hualiang Shen Fang Du Song Luo Shao Liu Xuelian Rui Yao Yang;Mingjian Liang;Chao Ma;Jun Li;Hualiang Shen;Fang Du;Song Luo;Shao Liu;Xuelian Rui

作者机构：Sichuan Earthquake AgencyChengdu610041China College of Earth SciencesChengdu University of TechnologyChengdu610059China Zhejiang Earthquake AgencyHangzhou310013China Chengdu Geological Survey CenterChina Geological SurveyChengdu610081China 

出 版 物：《Earthquake Research Advances》 (地震研究进展（英文）)

年 卷 期：2023年第3卷第3期

页      面：53-62页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：This work is supported financially by Spark Program of Earthquake Sciences,China Earthquake Administration(XH202301Y and XH23048C) State Key Laboratory of Earthquake Dynamics,Institute of Geology,CEA(LED2020B02) Lhasa National Geophysical Observation and Research Station(NORSLS21-04) Earthquake Science and Technology Special Project of Sichuan Earthquake Agency(LY2205 and LY2206) 

主　　题：Travertine Paleoearthquake Soft-sediment deformation U-series dating Litang fault 

摘      要：The Litang fault(LTF),located in the southeast of the Qinghai-Tibetan Plateau,is known for its high level of present-day seismicity,whereas its Pleistocene activity has been scarcely *** study focused on a tract of banded travertine deposits precipitated from thermal waters along the NW–SE-trending LTF *** role of travertine deposits in recording neotectonic activity has been studied by identifying their internal *** soft-sediment deformation structures observed within the banded travertines include micro folds,liquefied breccia,and liquefied *** deformed structures,which are restricted to a single unit separated unconformably by undeformed layers,can be traced for tens of meters,indicating that they were formed by seismic shaking triggered by LTF *** deformation of the banded travertine layers is attributed to the combined effects of seismic shaking,liquefaction,and fluidization,and it can be related to a paleo earthquake event with a magnitude of MS*** U-series ages obtained from the banded travertine deposits perturbed by the earthquakes are in the range of 130.59–112.94 ka,indicating an important fault-assisted neotectonic activity that occurred during the Middle–Late *** of such structures,in combination with the use of U-series dating methods,can yield a reliable timing of neotectonic activity and provide new evidence for under-standing the seismotectonic setting of the Litang area.