Abstract：Through interpretation and analysis of recent seismic exploration data,the reverse tectonics styles in the late of fault depression in Songliao basin can be divided into three kinds:the reverse tectonics,the fault reverse tectonics and the lift decline tectonics.The reverse tectonics activity in the late of fault depression had big influence on Xujiaveizi fault depression and Lisu fault depression,which formed reverse deforming structures such as anticline and reverse fault;but its influence on other fault depression mainly resulted in lift decline tectonics.Adopting the principle of unchanged layer length and areal conservation,the 2-D balanced restoration can be done for interpretation sections,after that,we considered that the reverse stage began the late of Kimaeridgian stage and ended at the late Ryazanian stage,resulted in making an end of fault depression in Songliao basin and in denudation because of uplift of the region.The analysis of regional tectonic stress field and of characters of earth evolution,the paper discussed the forming mechanism of inversed structure at the late of fault depression and discovered that the maximum stress direction of regional tectonic stress field resulted in reverse deformation was NEE-SWW,and the slowed and declined uplift of earth mantle resulted in squeeze stress in fragile crust,forming related shrinking reverse tectonics.
方立敏, 李玉喜, 殷进垠, 陈均亮. 松辽盆地断陷末期反转构造特征与形成机制[J]. 石油地球物理勘探, 2003, 38(2): 190-193.
Fang Limin, Li Yuxi, Yin Jinyin, Chen Junliang. Characters of reverse tectonics and its forming mechanism in late of fault depression in Songliao basin. OGP, 2003, 38(2): 190-193.
