首页|塔里木盆地库车褶皱冲断带东段依奇克里克背斜的构造特征和形成演化

塔里木盆地库车褶皱冲断带东段依奇克里克背斜的构造特征和形成演化

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依奇克里克背斜位于塔里木盆地北缘,库车褶皱冲断带北部构造带东段.它是一个基底卷入型开阔直立背斜,是在晚海西期古隆起和印支期库车周缘前陆盆地前渊带背景下形成的一个含油气构造.背斜核部出露的最老地层是白垩系下统,向两翼方向依次出露古近系、新近系和第四系.钻井资料揭示,之下还有三叠系和侏罗系含煤碎屑岩建造,不整合于石炭系灰岩之上.中新统吉迪克组至更新统西域组是背斜的生长地层,古近系及以下地层是前生长地层.背斜位于库车褶皱冲断带根带,发育厚皮构造;向前锋方向,逐渐演变为薄皮构造.褶皱冲断带的两个主滑脱断层分别发育于侏罗系煤层和吉迪克组膏盐层.作为印度—亚洲碰撞的远程效应,背斜的变形起始于古近纪末—新近纪初,经多个变形加速期,脉式冲断,直至第四纪晚期才最终定型.
Structural characteristics,formation and evolution of the Yiqikelik anticline in the eastern segment Kuqa fold-thrust belt,Tarim Basin,NW China
The Yiqikelik anticline is an open vertical anticline of basement involvement type in the eastern part of the northern belt of Kuqa fold and thrust belt in the northern margin of Tarim Basin.It was formed as a hydrocarbon structure under the background of Late Hercynian paleo-uplift and foredeep zone of the Kuqa peripheral foreland basin in the Indosinian Period.The oldest strata emerging from the anticlinal core is the Lower Cretaceous series.In the direction of the two wings,the Paleogene,Neogene and Quaternary appeared successively.Drilling data reveal that there are also Triassic and Jurassic coal-bearing clastic formations below,unconformbaly overlie the carboniferous limestone.The Miocene Jidike Formation to Pleistocene Xiyu Formation is the growth stratum of the anticline deformation,and the Paleogene and its substrata are the pre-growth strata.The anticline is in the root zone of the fold-thrust belt and developed thick-skin structures.Towards the front fold-thrust belt,it gradually evolved into thin-skinned structure.The two main detachment faults in the fold-thrust belt were developed in the Jurassic coal seam and the gypsum-salt layer in Jidike Formation respectively.As a remote effect of the India-Asia collision,the deformation of the anticline began from the end of Paleogene to the beginning of Neogene,with several deformation accelerations and thrust in pulse,until the Late Quaternary.

Late Cenozoic structureBasement-involved anticlineFar-field effect of India-Asia collisionYiqikelik anticlineKuqa fold-thrust beltTarim BasinSouth Tianshan Mountains

袁瑞、李君、蒋俊、缪卫东、黄智斌、康晓娟、宋煜、邓晓睿、师斌、汲雷昌

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中国石油天然气股份有限公司塔里木油田公司 新疆库尔勒 841000

中国石油天然气股份有限公司勘探开发研究院 北京 100083

中国石油天然气股份有限公司华北油田勘探开发研究院 河北任丘 062550

科新石油技术服务有限责任公司 新疆库尔勒 841000

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晚新生代构造 基底卷入型背斜 印度—亚洲碰撞远程效应 依奇克里克背斜 库车褶皱冲断带 塔里木盆地 南天山造山带

中国石油天然气股份有限公司前瞻性与基础性重大科技项目

2021DJ0605

2024

10.12017/dzkx.2024.085

地质科学
中国科学院地质与地球物理研究所

地质科学

CSTPCD北大核心
影响因子：0.79
ISSN：0563-5020
年,卷(期)：2024.59(5)
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