摘要
库车坳陷克拉苏构造带发育大量与膏盐相关的收缩构造,其深、浅构造变形不协调具有明显差异性。构造建模表明:克拉苏构造带属于库车坳陷北部强变形带,自西向东具有不同的变形样式。西部大北区段受前缘拜城断裂控制,发育断层规模小的基底卷入冲断叠瓦扇;东部克深区段则受后缘克拉苏断裂控制,发育大位移断层控制的盖层滑脱冲断叠瓦扇。克拉苏构造带基底断裂位移分布具有差异平衡的特点,基底断裂活动对膏盐层厚度及分布具有再调整作用。砂箱物理模拟结果显示,构造变形强度、膏盐层厚度及其分布差异是克拉苏构造带东、西段结构和垂向变形差异的主要控制因素。
There are lots of salt-related contractional structures developed in Kelasu structural belt, Kuqa depression. The obvious differential structural deformation in subsalt bed and sup-salt bed is uncoordinated. Structural modeling show that Kelasu structural belt belongs to the strongly deformed zone of northern Kuqa depression,which has a different structural deformation from west to east. The l）abei area of the western part is controlled by the Baicheng fault, develops basement-involved edge imbricate thrust system with small-scaled fault displacement. The Keshen area in the eastern section is controlled by Kelasu fault, owns the cover detachment edge imbricate structure which is controlled by the large displacement of master basement- involved fault. The displacement distribution of the basement faults in Kelasu structural belt has ＂differential balance＂ characteristics, and basement faulting has the effect of adjusting the thickness and distribution of salt layers. The results of the salt-related contractional sandbox experiments show that the strength of structural deformation, the thickness and distribution of salt layers are the main factors controlling the differences including the structure between the eastern and western part in Kelasu structural belt and the vertical deformation.
出处
《地质科学》
CAS
CSCD
北大核心
2013年第4期1177-1186,共10页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
国家科技重大专项课题(编号:2011ZX05009-001)资助
关键词
收缩构造
差异变形
砂箱模拟实验
大北-克深区段
克拉苏构造带
Contractional structure, Differential deformation, Sandbox experiment,Dabei-Keshen area, Kelasu structural belt
作者简介
李艳友，男，1982年lO月生，博士研究生，构造地质学专业。E—mail：liyanyoull30@163．com
