中文摘要：

通过区域地质、地层厚度、沉积特征以及断裂活动强度等分析,探讨东营凹陷新生代不同时期构造活动特征与沉积-沉降中心迁移规律,从构造动力学角度对沉降中心迁移机制提出合理解释.研究表明,东营凹陷新生代可划分为控凹断裂主控期、控凹控洼断裂共控期和拗陷期3个沉降阶段,在利津、牛庄和博兴一带存在3个呈＂逆时针＂旋转的沉降中心.沉降中心主要受活动速率较大的断裂控制,其迁移与盆地伸展背景下的走滑作用密切相关.但沉积中心的迁移除了受控于沉降中心外,还与沉积环境有关.在地壳表层,东营凹陷沉积-沉降中心的动态迁移受断裂走滑与伸展断陷的共同控制.在中国东部＂三个板块、两种俯冲＂构造动力学背景下,板块俯冲是地幔对流平衡破坏的触发因素,板块俯冲速度与角度的差异导致岩石圈不同部位的底侵,从而引发地表不同位置不同强度的断陷与走滑,在盆地内部表现为沉降中心的动态迁移.

英文摘要：

Based on the analysis of regional geology, stratigraphic thickness, sedimentary characteristics and fracture activity intensity, the tectonic activity and migration characteristics of the subsiding center and depocenter of the Dongying sag in different periods of Cenozoic were studied and a reasonable explanation was put forward on the migration mechanism of the subsiding center from the perspective of tectonic dynamics.The results show that the Dongying sag in Cenozoic can be divided into three periods, namely, sag-controlling period, both sag-controlling and subsag-controlling period, downwarp period, and that the three subsiding centers in Lijin, Niuzhuang and Boxing are those of anti-clockwise rotation.The subsiding centers were chiefly controlled by fractures with stronger activity rate and their migration was closely related to strike-slip under the background of basin extension.But the migration of the depocenter was not only controlled by the subsiding center, but also influenced by the sedimentary environment.In the surface of crust, the dynamic migration of the depocenter and the subsiding center was controlled by both the fault strike slip and extensional rift.Under the tectonic dynamics of ＂three plates, two subductions＂ in Eastern China, the plate subducting was the triggering factor for the disturbance of mantle convection balance.Different speeds and angles of plate subducting resulted in the underplating in different parts of the lithosphere, leading to the formation of faulted depression and strike-slip, which took the form of dynamic migration of subsiding centers in the interior of the basin.