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通过精细构造解释,在桩海地区识别出北西向、近南北向、北东向和北东东向4组断裂带,垂向上发育深、中、浅3套断裂系统:底部中古生界北北西向逆断裂系统,中部孔店组—沙二段在逆断层前锋位置发育北北东或近南北向正断层,浅部新近系东西向断层下降盘发育大量北东东向断层。构造演化研究认为,桩海地区经历了5次大规模构造运动,断裂演化可以分为8个阶段。
Through fine structure interpretation, four sets of faults in northwest direction, near north-north direction, northeast direction and NEE direction are identified in the pile sea area, and three sets of deep, medium and shallow fault systems are vertically developed: the bottom mesoproterozoic north and west To the reverse fault system, the Kongbudi Formation-Shaerdian section of the central part develops either a north-north-east or near-north-north normal fault at the reverse fault front and a large number of NE-E faults at the shallow foreland strike-descend fault. Tectonic evolution studies suggest that the pile-sea region experienced five large-scale tectonic movements, and the fault evolution can be divided into eight stages.