The structural characteristics and formation evolution of Qinjiatun-Qindong fracture zone in Lishu fault depression
Qu Shaodong1, Liu Chiyang1, Song Lijun1,2, Li Jian1, Chen Siqian1, Mao Guangzhou3
1. State Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069;
2. Xi'an Shiyou University, Xi'an 710065;
3. Shandong University of Science and Technology, Qingdao 266590
Based on our research,Qinjiatun fracture was composed by two right-lateral fractures,and formed in early Huoshiling period which controlled sedimentary thickness of the Huoshiling formation.While Qindong fracture formed relatively later,the major active stage is Denglouku-early Quantou period,which cut the early formed two right-lateral Qinjiatun fault,Qindong fault is a typical strike-slip fault.Qinjiatun fault and Qindong fault played a decisive role for the hydrocarbon migration and accumulation in this region.