济阳坳陷车镇凹陷构造演化与动力学成因机制

车镇凹陷构造研究欠缺，制约了油气勘探的进一步发展。采用构造解析、构造演化平衡剖面分析和构造物理模拟实验相结合的方法，明确了车镇凹陷形成的构造动力学成因机制。结果表明：车镇凹陷新生界经历了伸展（Ek-Es⁴）和走滑-伸展（Es³-Ed）两个断陷期，属于NNE-NE向右旋走滑-伸展断层控制的近菱形走滑-伸展型盆地。走滑-伸展阶段的走滑-伸展构造和区域加速沉降控制了车镇凹陷狭窄-陡深-多洼的构造格局。车镇凹陷在孔店组-沙四段时期主要受到拉张应力的作用，方向为NW-SE向。从沙三段开始，车镇凹陷开始受到NW-SE向走滑-伸展作用。印度板块由NNE向楔入欧亚板块之下以及太平洋板块NWW向低速俯冲于欧亚板块之下，郯庐走滑断裂带和兰聊走滑断裂带发生右旋剪切，导致渤海湾盆地进入走滑-伸展构造体制，是车镇凹陷的主要成因。

Tectonic evolution and dynamic origin mechanism in Chezhen Sag,Jiyang Depression

The lack of structural research in Chezhen Sag has restricted the further development of oil and gas exploration. In this paper, structural analysis, equilibrium profile analysis and analogue modelling experiments were used to investigate the dynamic mechanism of the Chezhen Sag. The results show that the Cenozoic in the Chezhen Sag experienced two phases rift. During Ek-Es4 the study area was dominated by extension followed regional transtension accommodated by strike-slip and extension (Es3-Ed), which resulted in a rhombic-shaped basin. The main expression of transtensional basin is the multiple narrow, deep depocentres. The Chezhen Sag was mainly subjected to NW-SE stretching during the Ek-Es4. After Es3, the Chezhen Sag began to be controlled by NW-SE extensional structure and stike-slip structure. The direction of the strike-slip movement is near NE direction. The formation and deformation of the Chezhen Sag is attributed to the subduction of the Indian Plate with the Eurasian late by the NNE and the NWW subduction of the Pacific plate with Eurasian plate in a low speed, which led to the dextral movement of the Tanlu strike-slip fault and Lanliao strike-slip fault.