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塔里木盆地西北部的阿瓦提凹陷周缘发育晚新生代正断层,其中第四纪的正断层活动是塔里木盆地构造地质研究的新发现。这些正断层受先存基底断裂控制,平面上沿沙井子断裂带、阿恰断裂带和吐木休克断裂带右阶式雁列状分布,构成右阶左旋张扭性正断层带。剖面上,向下断达下古生界后不清楚,向上断至第四系上部,构成阶梯状或小型地堑(或负花状构造)构造。生长系数计算结果表明,正断层带形成于新近纪末,第四纪早-中期持续活动,到第四纪晚期停止活动。这些张扭性正断层带的成因是阿瓦提地块相对于周边地质体的顺时针旋转而致,其动力学来源于印度板块与欧亚板块陆一陆碰撞,在晚喜马拉雅山期依然持续作用而导致的远程效应。
Late Neozoic normal faults are developed in the periphery of the Awati depression in the northwestern Tarim Basin. Quaternary normal faulting activities are the new discoveries in tectonic geology of the Tarim Basin. These normal faults are controlled by pre-existing basement faults and are distributed on the plane along the Shajingzi fault zone, the Aqia fault zone and the Tumen Shike fracture zone in the right-order echelon formation, forming a right-order L-type torsional normal fault zone. On the profile, the lower Paleozoic up to the lower reaches is not clear, and up to the upper part of the Quaternary, it constitutes a stepped or small graben (or negative flower-like structure) structure. The calculation of growth coefficient shows that the normal faulting belt formed in the late Neogene and early Quaternary, and continued to be active in the late Quaternary. These torsional normal faulting zones are caused by the clockwise rotation of the Awati block relative to the surrounding geologic bodies, and their dynamics originate from the collision between the Indian plate and the continental plateau of the Eurasian plate and continue in the late Himalayas Effect caused by the remote effect.