| 塔里木盆地巴楚隆起北缘阿恰基底卷入构造 |
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| 引用本文： | 杨庚,李本亮,杨海军,陈竹新,王晓波,张朝军,雷永良.塔里木盆地巴楚隆起北缘阿恰基底卷入构造[J].地质论评,2012,58(1):32-40. |
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| 作者姓名： | 杨庚 李本亮 杨海军 陈竹新 王晓波 张朝军 雷永良 |
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| 作者单位： | 中国石油勘探开发研究院提高石油采收率国家重点实验室，北京，100083;中国石油勘探开发研究院提高石油采收率国家重点实验室，北京，100083;中国石油塔里木油田分公司, 新疆库尔勒，841000;中国石油勘探开发研究院提高石油采收率国家重点实验室，北京，100083;中国石油勘探开发研究院提高石油采收率国家重点实验室，北京，100083;中国石油勘探开发研究院提高石油采收率国家重点实验室，北京，100083;中国石油勘探开发研究院提高石油采收率国家重点实验室，北京，100083 |
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| 基金项目： | 本文为国家重大油气专项课题“中西部前陆盆地构造地质、储层特征与有利区评价”（编号为2011ZX05003002）的成果。 |
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| 摘 要： | 塔里木盆地巴楚隆起为第四系不整合覆盖的古隆起,在其西北缘发育NW走向的阿恰断裂、萨拉姆布拉克背斜、向斜和隐伏的乔来麦提断裂。地震剖面和钻井资料显示,阿恰断裂为倾向南的基底卷入逆冲断裂,向北逆冲,错断层位从前寒武系基底一直到中寒武统膏岩,从西向东逆冲断距减少。乔来麦提断裂则以中寒武统膏岩为滑动面,向南逆冲,并在断层端部发育萨拉姆布拉克断层扩展褶皱。这两种类型构造样式的断裂(基底卷入断裂和盖层滑脱断裂),在剖面上组成典型的楔形构造几何形态,平面上形成三角形构造。遥感影像解译指出阿恰断裂和萨拉姆布拉克向斜向北西方向延伸进入柯坪逆冲带,并在该带有相应方向的地表构造显现,与北东走向的柯坪逆冲带组成叠加构造。生长地层分析确定基底卷入构造形成于始新世—中新世,而柯坪逆冲带形成于第四纪,明显晚于巴楚隆起形成时代。
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| 关 键 词： | 巴楚隆起 基底卷入 楔形构造 构造叠加 塔里木盆地 |
Basement Involved wedge shaped Structure of Aqia Fault in Northern Magin of Bachu Uplift in Northwestern Tarim Basin, Northwest China |
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| YANG Geng,LI Benliang,YANG Haijun,CHEN Zhuxin,WANG Xiaobo,ZHANG Chaojun,LEI Yongliang.Basement Involved wedge shaped Structure of Aqia Fault in Northern Magin of Bachu Uplift in Northwestern Tarim Basin, Northwest China[J].Geological Review,2012,58(1):32-40. |
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| Authors: | YANG Geng LI Benliang YANG Haijun CHEN Zhuxin WANG Xiaobo ZHANG Chaojun LEI Yongliang |
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| Institution: | 1)1) State Key Laboratory of Enhanced Oil Recovery, Research Institute of Petroleum Exploration and Development, PetroChina, Beijing, 100083;2) Tarim Oilfield Company, PetroChina, Korla, Xinjiang, 841000 |
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| Abstract: | The Tarim Basin records the history of deposition and deformation affected by the Indian—Eurasia collision during the Cenozoic. The seismic data shows that the faulted rigid Bachu uplift, central Tarim, is a paleo-uplift covered by Quaternary deposits. NW-striking Aqia fault, Qiaolaimaiti fault and Salambulake syncline and anticline between them were developed on the north margin of the Bachu uplift, northward adjacent to Awati depression. Many seismic lines and well data show that the Aqia fault is a deep basement-involved, south-dipping thrust fault, and the shallow structures are both Qiaolaimaiti north-dipping thrust fault and Salambulake fold. The Aqia fault cuts through the Precambrian basement to the Middle Cambrian evaporates and its displacements decrease from west to east. Salambulake anticline is a fault—propagation fold controlled by the Qiaolaimaiti fault which develops from the main decollement layer of the Cambrian evaporates. The south-dipping basement-involved fault,north-dipping cover-detached fault and Salambulake anticline forms a typical wedge-shaped structure in profile and a triangular structural belt in map view. The Aqia fault and the Salambulake fold extend northwestwardly into the Kelpin thrust belt and forms the NW-striking surface structures superimposed by northeastern-striking deformation. The growth strata indicates that NW-striking wedge-shaped structure formed during Eocene to Miocene, which extends northwestwards into the Kelping thrust zone formed in the Quaternary. |
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| Keywords: | Bachu Uplift basement-involved wedge-shaped structure structural superposition Tarim Basin |
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