塔里木盆地西北缘神木园-古木别孜冲断系的构造样式和形成演化过程  

Structural style and deformation history of Shenmuyuan‑Gumubiezi thrust system in the northwest margin of Tarim Basin

作　　者：李君[1] 周慧[1] 师骏[2] 缪卫东[1] 王斌[2] 张亮[2] 董才源[1] 李德江[1] 李洪辉[1] 赵岩 赵甜玉 师斌 李曰俊[4] Li Jun;Zhou Hui;Shi Jun;Miao Weidong;Wang Bin;Zhang Liang;Dong Caiyuan;Li Dejiang;Li Honghui;Zhao Yan;Zhao Tianyu;Shi Bin;Li Yuejun(Research Institute of Petroleum Exploration&Development,PetroChina,Beijing 100083;Tarim Oil‑Field Company,PetroChina,Korla,Xinjiang 841000;Kexin Petroleum Science&Technology Service Co.,Ltd.,Korla,Xinjiang 841000;Institute of Geology and Geophysics,Key Laboratory of Petroleum Resource Research,Chinese Academy of Sciences,Beijing 100029)

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油天然气股份有限公司塔里木油田分公司,新疆库尔勒841000 [3]科新石油技术服务有限责任公司,新疆库尔勒841000 [4]中国科学院地质与地球物理研究所,油气资源研究重点实验室,北京100029

出　　处：《地质科学》2023年第3期785-797,共13页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：中国石油天然气股份有限公司“十四五”前瞻性基础性技术攻关项目(编号:2021DJ03)资助。

摘　　要：塔里木盆地西北缘的神木园-古木别孜冲断系,由神木园冲断带和古木别孜冲断带组成。前者位于乌什凹陷北缘,以厚皮构造为主,形成基底卷入型冲断楔。后者位于乌什凹陷南缘,为一盖层滑脱冲断构造,主滑脱面位于中新统吉迪克组膏泥岩。其中,古木别孜背斜是古木别孜断裂的断层传播褶皱。该冲断系是晚新生代南天山陆内造山带南麓的前陆褶皱冲断带的一部分,属于印度—亚洲碰撞的远程效应。该陆内造山带叠加在先存的增生-碰撞造山带之上。生长地层显示,神木园-古木别孜冲断系形成演化过程为前展式。其变形首先发生于冲断系根带的神木园冲断带,起始于上新世中期(3.5 Ma)。上新世末—第四纪初(1.8 Ma)向前推进至古木别孜冲断带,并在第四纪持续演化。The Shenmuyuan‑Gumubiezi thrust system in the northwest margin of Tarim Basin is constituted of Shenmuyuan and Gumubiezi thrust belts.The former is located in the northern margin of Wushi Sag,and is mainly composed of thick‑skinned structures,forming a basement‑involved thrust wedge.The latter is located in the southern margin of Wushi Sag.It is a thin‑skinned thrust structure.The main detachment fault is located in the Miocene Jidike Formation gypsum mudstone.In the Gumubiezi thrust belt,the Gumubiezi anticline is the fault‑propagation fold of the Gumubiezi fault.The thrust system is a part of the Late Cenozoic foreland fold‑thrust belt at the southern foot of the South Tianshan Mountains which is a Late Cenozoic intracontinental orogenic belt formed under the far‑field effect of India‑Asia collision,and superimposed on the ancient accretionary‑collision orogenic belt.The growth strata show that the formation and evolution process of Shenmuyuan‑Gumubiezi thrust system is forward‑propagating.The deformation of the thrust system first occurred in its root zone,the Shenmuyuan thrust belt,in the Middle Pliocene(3.5 Ma).From the end of Pliocene to the beginning of Quaternary(1.8 Ma),the thrust system advanced to the Gumubiezi thrust belt and continued to evolve in Quaternary.

关 键 词：神木园—古木别孜冲断系 南天山南麓前陆褶皱冲断带 前展式冲断 印度—亚洲 碰撞的远程效应 晚新生代 

分 类 号：P542[天文地球—构造地质学]