临清坳陷东部早—中侏罗世地层剥蚀量恢复与原型盆地

Restoration of Denuded Formation Thickness and Prototype Basin of Early to Middle Jurassic in Eastern Linqing Depression

受中生代以来多次构造运动的控制,临清坳陷东部在不同构造时期盆地性质也不相同。在对研究区进行地震解释基础上,分析了临清坳陷东部自侏罗纪以来的构造演化历史,恢复了下—中侏罗统剥蚀量和原始地层厚度,并结合同一时期的断裂系统图对盆地发育特征进行了初步分析。结果表明:临清坳陷东部J1-2处于坳陷盆地发育阶段;地层剥蚀程度的强弱主要受自晚侏罗世以来的多期构造运动所形成的各种构造的控制,呈现剥蚀厚度呈NE向大小相间分布的规律;J1-2时期盆地整体展布方向为NE向,盆地展布主要受印支期所形成的挤压构造所控制。

The basin natures of eastern Linqing depression are different in different tectonic periods due to the control from a number of tectonic movements since Mesozoic.Based on the accurate interpretation of seismic data,the paper analyzes the tectonic evolution history of Linqing depression since the Triassic,restores the denuded thickness and the original thickness of Lower-Middle Jurassic and initially analyzes the growing characteristics of the early-middle Jurassic basin in corporation with the fault system diagram of the same period.The study result shows that J1-2 stage of Eastern Linqing is under growing in the depression basin;the denuded thickness is mainly controlled by the structures formed by the tectonic movements after late Jurassic and is characterized of alternative distribution regularity with different sizes in NE direction;and the J1-2 basin distribution is in NE direction and the formation distribution is mainly controlled by the compression structure formed in Indo-China period.