摘要:吐木休克断裂位于塔里木盆地西部，巴楚隆起和阿瓦提凹陷之间，是一条大型基底卷入型冲断构造。走向NW-SE，呈弧形向NEE凸出；倾向巴楚隆起。根据构造变形特征，断裂自NW向SE可以划分为4段。Ⅰ和Ⅲ段为简单基底卷入型冲断构造段；Ⅱ段发育背冲断层，与主干断层呈“y”字型剖面组合关系；Ⅳ段为基底卷入型楔状构造，主冲断层顶部出现一条向巴楚隆起逆冲的反冲断层。断裂上盘发育背斜，下盘有明显的“牵引构造”，显示吐木休克断裂可能是由吐木休克背斜北翼突破形成的，是一条褶皱相关断层。吐木休克断裂形成于中新世晚期至上新世初，持续演化至第四纪。断裂带上发育的上新世末—第四纪初正断层代表印度—亚洲碰撞脉动式远程效应的一个构造间歇期。吐木休克断裂东侧的巴东断裂是巴楚隆起与塔中隆起的过渡构造带，雏形形成于奥陶纪晚期—志留纪，晚新生代复活。
关键词: 吐木休克断裂/
巴东断裂/
塔里木盆地西部/
冲断楔/
晚新生代/
印度—亚洲碰撞/
远程效应
Abstract:The Tumuxiuke fault located between the Bachu Rise and Awati Sag, is a large basement-involved thrust in the western Tarim Basin. It extends in arc-shape protruding to the Awati Sag, and dips to the Bachu Rise. According to the deformation charateristics, the fault can be divided into 4 segments. From NW to SE, the Ⅰ and Ⅲ segments are simple basement-involed thrusts. The Ⅱ segment has a back thrust. The main thrust and back thrust combine into a "y" shape structure in profile. The Ⅳ segment is a basement-involved thrust wedge. There is a back thrust on the top of the main thrust. The Tumuxiuke anticline appear on the hanging wall of the Tumuxiuke fault, and a "draging structure" at the foot wall. The fault maybe a fold-related fault formed from the break of the northern wing of the anticline. The Tumuxiuke fault was formed in Late Miocene-beginning Pliocene, and lasted to Quaternary. The end Pliocene-beginning Quaternary normal faults on the fault belt represent a tectonic pause of the far-field effect of the India-Asia collision. The Badong fault east of the Tumuxiuke is a transfer zone between the Bachu and Tazhong Rise. It was formed in Late Ordovician-Silurian, and revived in Late Cenozoic.
Key words:Tumuxiuke fault/
Badong fault/
Bachu Rise/
Western Tarim Basin/
Basement-involved thrust/
Back thrust/
Thrust wedge
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