The basement of the basin is likely to go through such processes before Permian period: the diving of ocean,the hyperplasia of island arc,then the collision of continents,and it is an active island arc belt.

• 盆地前二叠纪基底可能经历了洋盆俯冲、岛弧增生、陆块碰撞的造山作用过程，基底属于活化基底岛弧带。