Chronology test and its significance of ancient earthquakes in the Pleistocene in southwestern margin of Qaidam Basin
Zhu Meng;Li Dewei;Li Shu;Liu Demin;Luo Wenxing;Changjiang Institute of Survey Technical Research.MWR;School of Earth Sciences,China University of Geosciences (Wuhan);Three Gorges Geotechnical Consultants Co.,Ltd.;
The southwestern margin of the Qaidam Basin was intensely affected by a series of faulting movement of the Neocene in the north of Kunlun Mountain,and developed serious soft sediment deformation structure such as load structures, flame structures, ball-and-pillow structures, seismic breccias,ground fissure,vibrational liquefaction deformation structure and synsedimentary micro-fault faults. The regional geological survey,the measured sections and sample tests all analysis that there were three strong uplift of mountains in 1. 8-1. 2 Ma,0. 8 Ma and 0. 15 Ma,these uplift events were accompanied by a strong ancient seismic activity. As the sedimentary and structural response in the uplift event,it formed a series of typical continental facies interplate seismites and the construction signs of seismites. It has a important significance to research the interplate uneven uplift of the Qinghai-Tibet Plateau and relationship among tectonic uplift,earthquake,deposition effects.
【CateGory Index】： P534.631;P315