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《Journal of Nanjing University(Natural Sciences)》 2008-01
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A kinematic model for the deformation of the Qaidam Basin since the Middle Miocene based on seismic data

Wang Sheng-Li1,Li Wei-Feng2,Wei Dong-Tao1,Tan Yan-Hu3,Lu Hua-Fu1(1.Department of Earth Sciences,Nanjing University,Nanjing,2100093,China;2.School of Earth Sciences,Yangtze University,Jingzhou,434023,China;3.Qinghai Oil Field,PetroChina,Dunhuang,736202,China)  
The Qaidam Basin is one of the intermountain basins in western China,and its deformation was controlled by uplift of the bilateral mountains since the Middle Miocene.Based on interpretation and analysis of one seismic profile across the Qaidam Basin,we conclude that the southern slop of the Qaidam basin is thrust over the northern piedmont of the Eastern Kunlun Mountains with an average velocity of 4.7 mm/y since the middle Miocene,which is confirmed by several faults throwing southward and fault-related folding throwing southward in the southern part of the basin.The thrust wedge in the southern piedmont of the Qilian Mountains is thrust northward,and the branches of the roof back-thrust result in fault-related anticlines with gentle southern limbs and deep northern limbs and are cropped locally in the east segment of the northern flank of the basin.The wedge tops of the two thrust wedges in the southern piedmont of the Qilian Mountains and in the north piedmont of the Eastern Kunlun Mountains thrust over the middle part of the basin and have led to deformation of the Quaternary sediments.
【Fund】: 国家自然科学基金(40576025);; 中国科学院边缘海地质重点实验室(MSGLO605)
【CateGory Index】: P542
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