塔里木盆地西南缘盆山结合带东段逆冲体系的形成及演化过程  

Thrust system and its evolution in eastern part of the basin-range junction belt between the West Kunlun and Tarim Basin

作　　者：徐晓尹[1] 蔡志慧[2] 何碧竹[2] 杨有星[3] 程木伟[1] 何翠[1] 

机构地区：[1]中国地质大学能源学院,北京100083 [2]中国地质科学院地质研究所,北京100037 [3]中国地质调查局油气资源调查中心,北京100029

出　　处：《岩石学报》2016年第12期3743-3752,共10页Acta Petrologica Sinica

基　　金：中国地质调查局项目(1211302108022-3;[2015]02-04-01-003);国家自然科学基金项目(41302166)联合资助

摘　　要：塔西南盆山结合带位于青藏高原与塔里木盆地的结合部位，以发育逆冲推覆构造为主要变形特征，是研究青藏高原与塔里木关系的理想对象，也是塔里木油气成藏的重要潜力区。本研究主要通过野外考察、卫星图片解译以及重点地震剖面解释，对塔西南盆山结合带东段和田地区逆冲体系的结构及变形特征进行了分析。并且在前人研究基础上，阐述了塔西南盆山结合带东段逆冲体系的形成时限。我们认为塔西南盆山结合带东段逆冲体系由几个逆冲岩席组成，这些逆冲岩席皆形成在中新世之后，并且形成时间由南到北逐渐变新。我们采用了平衡剖面恢复手段对塔西南盆山结合带东段的变形程度及演化过程进行推理。指出塔西南盆山结合带东段新生代上地壳缩短率为36％-38％，且主要发生在中新世以来。塔西南盆山结合带东段逆冲体系的形成是新生代印度亚洲两大板块碰撞事件远程效应产生的结果。The basin-range junction belt between Tibetan Plateau and Tarim Basin featured by deformation structure of thrust system, is an ideal object to study the relationship between Tibetan Plateau and Tarim Basin, is an important potential area to explore oil. Through field geological survey, satellite image interpretation and major seismic section interpretation, we analyzed the characteristics of thrust system in the basin-range junction belt of the West Kunlun-Tarim Basin, discussed its forming time combined with previous studies. We regard the thrust system of the northwestern Tarim basin-range junction belt composed of several thrust sheets which formed after Miocene and are younger increasingly from south to north. We illustrated its deformation extent and evolution process using balanced section technique. The upper crust shortening rate of the basin-range belt in Cenozoic is 36% - 38% and mainly occurred after Miocene. The thrust system is a result of remote effect of Cenozoic India-Asian collision event.

关 键 词：塔西南 盆山结合带 逆冲体系 构造演化 

分 类 号：P542.3[天文地球—构造地质学]