地质学报2018，Vol.92Issue(3)：437-448,12.
盐层厚度对褶皱拼接样式的影响——以库车褶皱-冲断带西段前缘背斜带为例
The Effect of Salt Thickness on Fold Lateral Linkage: A Case Study of the Anticlines in the Leading Edge of the Western Kuqa Fold and Thrust Belt, South Tianshan
摘要
Abstract
In this study,we analyzed the variation of salt layer thickness in the leading edge of the western Kuqa fold and thrust belt and its effects on structural style,wavelength and fold lateral linkage of the anticlines using integrated seismic reflection profiles,drilling,remote sensing imagery and DEM data.The results indicate that the initial salt sediments of ～ 1.0 km together with allochthonous salt facilitated the formation of a ～300 km long anticline with wavelengths of ～ 22 km in the Qiulitage structural belt by lateral linkage of individual fold segments with a hinge distance as much as 10.3 km.However,the initial thickness of salt underlying the Kalayuergun structural belt is 0.1～0.9 km,and decreases from west to east.The difference in salt thickness resulted in contrasting fault patterns above the core of anticlines in this belt.As a result,the lateral linkage occurred between Nanka and Zhongka anticlines with a hinge distance of ～ 6.5 km,whereas the Beika anticline developed as an isolated fold even if a shorter hinge distance of ～6.1 km.Therefore,we suggest that the thickness of salt layers resulted in difference of fold wavelength and fault patterns,and further affect whether lateral linkage is able to occur between individual fold segments.Although the results of this study need to be validated by further investigations,we still believe they can help us in better understanding the deformation of compressional salt structures and their controls on fold development.关键词
盐层厚度/褶皱拼接/构造样式/背斜波长/库车褶皱-冲断带Key words
salt thickness/fold lateral linkage/structural style/fold wavelength/Kuqa fold and thrust belt引用本文复制引用
唐鹏程,饶刚,李世琴,余养里..盐层厚度对褶皱拼接样式的影响——以库车褶皱-冲断带西段前缘背斜带为例[J].地质学报,2018,92(3):437-448,12.基金项目
本文为国家“十三五”科技重大专项(编号2017ZX05001-002)、国家自然科学青年基金项目(编号41102124)及西南石油大学校青年基金项目(编号2010XJZ139)资助的成果. （编号2017ZX05001-002）
