佳－伊地堑方正断陷的断裂控盆效应

FAULT CONTROL EFFECT AT FANGZHENG FAULT DEPRESSION IN JIA-YI GRABEN

在分析和描述方正断陷主要断裂构造的发育与分布规律的基础上，着重探讨了北东向基底卷入型控盆断裂运动的时空分布特征与断陷的时空演化、充填堆积序列和沉积相带分布的关系，为油气生成和保存条件的研究提供了地质依据。根据断裂的控盆控凹作用，方正断陷划分为３个次级构造单元和３个构造层序以及地堑期的不同盆地样式的２个发育阶段。

On the basis of analysis and description of the features of faulting and fracture distribution on Fangzheng fault depression,the relations between the features of the movement in space-time of NE strike faults and the evolution of the fault depression,depositional sequence and distribution of sedimentary facies are discussed, and a geological basis for studying the conditions of generation and preservation of hydrocarbon is provided.According to faults controlling,effect,Fangzheng fault depression is divided into three secondary elements,which underwent three structural sequences and undergone two evelution stages with different styles at the graben stage.