The large scale basement fault in northern Qaidam Basin：
The study on structural characteristics of Maxian fault
Wang Liang1,2 Xiao Ancheng1,2 Yang Shufeng1,2 GongQinglin3 Zhou Suping4
Shen Zhongyan1,2 Wu Lei1,2 Lou Qianqian
1.Department of Earth Sciences|Zhejiang University|Hangzhou|Zhejiang 310027； 2.Research Center for Structure in Oil & Gas Bearing Basins|Ministry of Education|Hangzhou|Zhejiang 310027；3.BGP Inc., China National Petroleum Corporation, Zhuozhou, Hebei 072750|4.Qinghai Oilfield Company|Dunhuang|Qinghai 736202
According to the ground geological，geophysical and drilling data，characteristics of distributions and section structures of Maxian fault belt in northern Qaidam Basin are analysed. Its formation and development time and kinematic characteristics are detailed researched. On the basis，a reasonable kinematics model of the active fault is proposed. The results are that Maxian fault is formed in Late Cretaceous，and has a longterm activity in Cenozoic，controlling basin structures，sedimentary distributions and oil and gas accumulations，The fault dips to south and is a leftlateral strikeslip thrusting fault. The kinematic characteristics of Maxian fault derive from the differential pushes of south Qilian Mountains to Qaidam Basin.