The Cenozoic strike?slip characteristics along the Tan?Lu Fault Zone of the Weibei?Laizhouwan area
Li Li1 Tan Mingyou2 Zhang Mingzhen2 Xu Yi3 Li Zhiwei 3 Shi Xiupeng1 |Gong Hongbo1 Tang Zhibo1 Hu Qiuyuan1
1.Institute of Earth Resource and Information|China University of Petroleum|Dongying|Shandong 257061|2.Geophysical Research Institute of Shengli Oilfield Branch Company|China Petroleum and Chemical Corp.|Dongying| Shandong 257022|3.Institute of Geology and Geophysics|Chinese Academy of Sciences|Beijing 100029
The Laizhouwan transitional zone of the Tancheng?Lujiang Fault lies between the north of Weifang and the south of the Bohai Bay. The date from seismic profiles which crosscut the Tan?Lu Fault Zone and the characteristics of sedimentary and hydrocarbon in this zone directly/indirectly indicate the extending，kinematics property，and the activity time limit. The Tan?Lu Fault Zone has similar characteristics of geometry shape and geometry array in land area just as it appears in sea area. It can be inferred that Tan?Lu Fault Zone is a faulting system with vertical displacement. Syntectonic deposits controlled by the movement of strike?slip fault zone show a sectional feature of the activity time limit of Tan?Lu Fault Zone. From south to north，it equals to E1?2k deposition to the E2?3s4(Paleocene to Early Eocene)，E1?2k deposition to the E2?3s2(Paleocene to Eocene)，E1?2k deposition to the E2?3s1(Paleocene to Oligocene)in Bohai Bay Basin. The direction of the strike?slip pull?parting migrated from south to north. The fault zone experienced sinistral strike?slip movement from Paleocene to Early Eocene，after Early Eocene，the strike?slip direction is instead of right?lateral strike?slip movement.