塔里木盆地阿瓦提—巴楚地区褶皱构造特征  

FOLDING CHARICTERISTICS OF AWATI—BACHU AREA IN THE TARIM BASIN

作　　者：刘志宏[1] 王孔伟[2] 迟元林[2] 王文革[2] 林东成[2] 张立国[2] 葛百成[2] 

机构地区：[1]吉林大学地球科学学院,长春130061 [2]大庆油田勘探开发研究院,黑龙江大庆163712

出　　处：《地质科学》2004年第2期251-259,共9页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：大庆油田有限责任公司勘探开发研究院项目"塔里木盆地大庆区块断层封闭性研究"资助

摘　　要：研究区位于塔里木盆地西部 ,主要跨越巴楚断隆和阿瓦提凹陷两个构造单元。寒武纪以来 ,研究区主要发育 3个时期、两个方向的褶皱构造。第一期北西向褶皱构造为轴向北西的断层转折褶皱 ,形成于中寒武世—泥盆纪 ,它们当时都是一些“水下隆起” ,在全区均有分布。第二期南北向褶皱构造为规模相差较大、轴向近南北的断层转折褶皱和少量断层传播褶皱 ,形成于晚二叠世 ,发育于吐木休克断裂带附近及其以北的区域 ,西部背斜构造的幅度、规模都较东部大。第三期北西向褶皱构造为轴向北西的断层传播褶皱 ,形成于老第三纪—现在 ,发育于吐木休克断裂带附近及其以南的区域。吐木休克断裂带是形成于老第三纪—现在的右行聚合型走滑断裂带 ,对研究区发育的褶皱构造主要起破坏和改造作用。研究区的伸展作用过程发生于早二叠世 ,塔里木盆地进入了克拉通内裂谷形成阶段 ,出现广泛分布的基性火山岩和基性侵入岩体、岩墙。The studied area, including the Bachu Block Uplift and the Awati Depression, was situated in the western part of the Tarim Basin. The folds of three generations and two orientations were distinguished since Cambrian. The first generational northwest folds were fault band folds, formed during Middle Cambrian to Devonian, which were “under water uplift”, distributed over the whole studied area. The second north south folds were fault band folds and a few fault propagation folds, created during Late Permian, which were larger scale in the west and smaller scale in the east, distributed over the Tumuxiuke fault belt and the area north of the fault. The third northwest folds were fault propagation folds, formed during Palaeogene to nowadays, which distributed over the Tumuxiuke fault belt and the area south of the fault. The Tumuxiuke fault belt was a big scale dextral reversed strike slip one, transformed or destroyed the fold structures in the studied area. A short term extension occurred during Early Permian, during that time the Tarim basin entered a stage of intracratonic rifting, and the basic volcanic rocks, mafic intrusive bodies and dikes widely developed.

关 键 词：断层转折褶皱 断层传播褶皱 走滑断层 生长地层 构造特征 

分 类 号：P542.2[天文地球—构造地质学]