The Tumuxiuke fault belt, which locates in the western Tarim Basin, is a large-scale basement-involved fault zone and forms the boundary between the Awati Sag and Bachu uplift （sub-tectonic units of Tarim Basin）. Since a mass of strata in the hanging wall of fault is missing, it is very hard to determine the active period of fault. Systematic interpretation of seismic profiles across the Tumuxiuke fault reveals that this fault can be divided into five sections according to tectonic features. Combine with the regional structural settings, distribution features of strata and stratigraphic contact relationship, active stages of the Tumuxiuke fault are redetermined. The results show that the Tumuxiuke fault is characterized by multi-stage activities. The thrust activities were begun in Late Caledonian and the massive thrusting movements were occurred during the Early Jurassic to Early Cretaceous, during which the structural rudiment in the northern margin of Bachu uplift was formed and finally stabilized in the late of Himalayan Movement. Ulteriorly, tectonic evolution and hydrocarbon accumulation model in the area of Bachu uplift and Awati Sag are established. Carbonate traps in the first-row structure belt of hanging wall and faulted nose-shaped traps within Silurian in the heading wall of Tumuxiuke fault are the favorable exploration regions, which can accept filling of natural gas that generated in the Himalayan period. Evaluation of preservation conditions are the key to exploration and there have bright prospects for the exploration of natural gas in the northern margin of Bachu uplift.
Chen Xiangfei Zhou Chenggang Han Changwei Liu Yongbin Wang Lei Jing Jing Liu Liwen Liu Jun. Recognition of active stages of Tumuxiuke fault in northern Bachu uplift and its inspiration for petroleum exploration[J]. Chinese Journal of Geology, 2020, 55(1): 30-42.