According to quantification sedimentology features and forming setting , it successively underwent orlginal pregnancy , denude and st rong fill , three stages in the course of the Basin evolution.

• 根据量化沉积学特征及成生背景分析，该区大致经历了初始孕育期、分段剥蚀充填期及后期构造改造三大演化阶段。