库车坳陷西段阿瓦特构造转换带盐构造演化特征及影响因素  

Characteristics and Influencing Factors of Salt Structure Evolution in Awate Transfer Zone,Western Kuqa Depression

作　　者：吴珍云 杨秀磊 尹宏伟[3] 董少春[3] 李长圣 汪伟[3] 贾东[3] Wu Zhenyun;Yang Xiulei;Yin Hongwei;Dong Shaochun;Li Changsheng;Wang Wei;Jia Dong(State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;School of Earth Sciences,East China University of Technology,Nanchang 330013,China;School of Earth Sciences and Engineering,Nanjing University,Nanjing 210046,China)

机构地区：[1]东华理工大学核资源与环境国家重点实验室,江西南昌330013 [2]东华理工大学地球科学学院,江西南昌330013 [3]南京大学地球科学与工程学院,江苏南京210046

出　　处：《地球科学》2023年第4期1271-1287,共17页Earth Science

基　　金：国家自然科学基金(Nos.41602208,42072320,41972219,41572187);东华理工大学博士启动基金(No.DHBK2019053).

摘　　要：为厘定库车坳陷西段盐岩沉积边界盐构造演化特征及影响因素,利用野外地质调查、工业地震剖面解析和三维沙箱物理模拟实验对阿瓦特构造带进行了综合分析.结果表明:(1)阿瓦特构造带是库车坳陷西段典型挤压构造转换带,由乌什凹陷至阿瓦特凹陷,形成了由叠瓦逆冲断层向盐相关褶皱过渡的构造转换特征;(2)塔拉克走滑断层发育于乌什凹陷和阿瓦特凹陷交界处,是一条发育于盐上覆层的滑脱形成调节性横断层.受该断层影响,在盐上覆地层中形成塔拉克向斜、塔拉克背斜等拖曳式盐相关构造.越靠近塔拉克走滑断层,褶皱拖曳揉皱作用越强,甚至容易发育褶皱相关断层,促使盐岩出露地表;(3)阿瓦特构造转换带新生代变形主要受区域挤压作用、盐层分布及基底断裂活动共同控制.In order to determine the characteristics and influencing factors of salt structure evolution located at the border of salt basin in western Kuqa depression,a comprehensive analysis of Awate transfer zone was carried out by field geological survey,structural analysis of industrial seismic profiles and 3D sand-box analogue modeling experiment.The results show follows.(1)Awate structural belt is a typical compressional structural transfer zone in western Kuqa depression,where differential structures formed from imbricated thrust faults in the Wushi sag to salt-related folds in the Awate sag.(2)The Talake strike-slip fault occurred at the junction of Wushi sag and Awate sag is an accommodative transverse fault developed in the overburden.Influenced by this fault,Talake syncline,Talake anticline and other drag salt-related structures formed in the overburden.The closer to the Talake strike-slip fault,the stronger the drag and wrinkling effect becomes,and even the fold-related faults are easy to develop,prompting the outcrop of salt rock in the core of anticline.(3)The Cenozoic deformation of Awate structural transfer zone is mainly controlled by regional compression,the distribution of salt rock and the activity of basement faults.

关 键 词：库车坳陷 阿瓦特构造转换带 盐相关褶皱 塔拉克走滑断层 沙箱物理模拟 构造地质学 

分 类 号：P548[天文地球—构造地质学]