塔里木盆地西部南北向构造的发现及其意义  

Discovery of meridional structures in the western Tarim basin and their implications

作　　者：刘志宏[1] 王孔伟[1,2] 王文革[3] 林东成[3] 张立国[3] 

机构地区：[1]吉林大学地球科学学院 [2]大庆油田勘探开发研究院,黑龙江大庆163712 [3]大庆油田勘探开发研究院

出　　处：《地质通报》2003年第5期319-324,共6页Geological Bulletin of China

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：塔里木盆地是介于青藏高原和天山造山带之间的一个刚性块体,前人在盆地内部相继发现了平行于周边造山带的构造和近东西向构造,并且对这些构造的特征、形成和演化进行了深入研究,但在塔里木盆地始终没有发现南北向构造。本次在塔里木盆地西部发现的南北向构造为断层转折褶皱和断层传播褶皱,主要形成于晚二叠世,反映了塔里木盆地在晚二叠世曾经受到来自西部的挤压作用。在印度板块与欧亚板块碰撞的远距离效应影响下,吐木休克断裂带附近的南北向构造自古近纪以来又重新活动。The Tarim basin is a rigid block which is situated between the Qinghai-Tibet Plateau and Tianshan orogenic belt.Previous workers found nearly E-W structures and structures parallel to the pe-ripheral orogenic belt in the interior of the basin and intensively studied the characteristics,formation and evolution of these structures.However,they did not find meridional structures.In this study the authors have found meridional structures in the western Tarim basin.They are meridional hinge folds and a fault propagation fold,which mainly formed during the Late Permian.The meridional structures reflect that the Tarim basin had undergone compression from the west in the Late Permian.Under the long-distance ef-fect of collision of the Indian and Eurasian plates,the meridional structures near the Tumxuk fault belt have been activated again since the Palaeogene period.The discovery of the meridional structures is of great significance for hydrocarbon exploration.

关 键 词：南北向构造 生长地层 晚二叠世 塔里木盆地西部 

分 类 号：P542[天文地球—构造地质学]