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通过分析福山凹陷的构造演化史与各时期原型盆地形态,对福山凹陷内部构造发育的成因机理进行研究.认为福山凹陷形态的演化导致其内部产生了双层断裂、东西分区与构造变换带,同时也影响着沉积体系的发育.研究结果表明:福山凹陷构造的形成主要受到一条主控断裂的活动控制,即临高断层;临高断层古近系时期整体表现为东侧伸展量大于西部的不均衡活动特征,使福山凹陷古近纪地层呈三角形态;而临高断层在各时期的演化,使福山凹陷由非旋转式半地堑形态向坡坪式半地堑形态转换.福山凹陷形态的演化加上流二段地层高塑性泥岩的韧性作用,导致了上下断裂系统的发育;其主控断裂在不同时期具有活动速率迁移性特征,使凹陷旋转伸展的方向在不同时期会发生调整,从而导致福山凹陷东西部地区形态演化的不一致;而形态演化的不一致是形成东西分区与构造变换带的主因.
By analyzing the tectonic evolution history of the Fu-Shan Sag and the prototype basin shape in each period, the genetic mechanism of the internal structural development in the Fu-Shan depression was studied, and the evolution of the Fu-Shan Sag led to the occurrence of double-layer faults, east-west zoning and tectonic transformation zones But also affect the development of sedimentary system.The results show that the formation of the Fukuain sag is mainly controlled by a main fault activity, ie, the high fault; the Proof of the Paleogene in the Pro-high fault is characterized by an eastward extension greater than the west The characteristics of the equilibrium activity make the Paleogene stratigraphy in the Fukuyama depression have a triangular shape, while the evolution of the Lin Gao fault in each period makes the Fushan sag change from a non-rotational half-graben shape to a slope-type semi-graben shape. Evolution and the ductile effect of the high plasticity mudstone in the second member of the stream lead to the development of the upper and lower fault systems. The dominant fault has the characteristics of moving velocity and mobility at different periods, so that the direction of rotation and extension of the depression will be adjusted at different periods, Inconsistency of morphological evolution between the eastern and western parts of the Fukuyun Sag; and the inconsistency of morphological evolution is the result of the formation of east-west zoning and structure Make the main reason of transformation belt.