摘要
犁式正断层形成的主要原因是在引张条件下沉积层中有塑性地层存在.沿犁式正断层分布的水下扇岩性圈闭受犁式正断层倾角的控制,当其倾角在20°左右时水下扇即消失.通过建立数学模型.应用回归分析方法可计算出济阳坳陷犁式正断层的轨迹.
The trace of listric normal fault can be obtained with the method of regression analysis and mathematical model. Interrelated coefficients of calculated profiles are more than 0. 97. Formation of listric normal fault in Jiyang depression has a relationship with the following factors: (a) existence of ductile layer, (b) compaction, (c) rotation of fault-block and (d) erosion action in steep bank of lacustrine basin. Lithologic traps were controlled by the dip of listric normal fault, in form of subaqueous fan along listric normal fault, and disappear when the dip is about 20°.
出处
《石油大学学报（自然科学版）》
CSCD
1996年第4期11-15,共5页
Journal of the University of Petroleum,China(Edition of Natural Science)
关键词
正断层
岩性圈闭
数学模型
济阳坳陷
Normal fault
Lithologic trap
Mathematical model
Jiyang depression
