论文部分内容阅读
营口—佟二堡断裂带是控制辽河坳陷东部凹陷形成和演化的主体构造体系,是郯庐断裂带的北延部分。根据地质资料分析和构造物理模拟实验研究,营口—佟二堡断裂带在新生代经历了早期的拉张应力和后期右行剪应力的复合作用。拉张构造运动发生在古新世房身泡组沉积期至始新世沙河街组一段沉积期(距今约37.0～63.0Ma),在大陆裂谷演化阶段因地幔上涌而派生;右行走滑构造运动发生在渐新世东营组沉积期(距今约24.5～36.9Ma),后期右行剪应力作用使早期断裂再活动并形成新的断裂。基于构造物理模拟实验结果和对地质资料的分析,渐新世右行走滑构造运动导致的辽河坳陷水平位移约为4～8km。图5参12
The Yingkou-Tong’erbo fault zone is the main structural system that controls the formation and evolution of the eastern sag in the Liaohe Depression, and is the northern extension of the Tan-Lu fault zone. According to geological data analysis and tectonic physical simulation experiments, the Yingkou-Tong’erbao fault zone experienced the composite effects of early tensile stress and late-stage right-lateral shear stress in the Cenozoic. The extensional tectonic movement took place during the sedimentary period of the Paleozoic Fangshenpao Formation to the first Eocene Shahejie Formation (~ 37.0 ~ 63.0Ma ago), due to the upwelling of the mantle during the evolution of the continental rift; The slip tectonic movement took place in the depositional period of the Dongnian Formation of the Oligocene (about 24.5-36.9 Ma from now), and the late-stage shear stress on the right-hand side reactivated the early faults and formed new faults. Based on the results of tectonic physical simulation and the analysis of geological data, the horizontal displacement of the Liaohe Depression caused by the Oligocene right-strike strike-slip tectonic movement is about 4 ~ 8km. Figure 5 参 参 12