| 塔里木盆地巴楚隆起的三维地质结构及成因机制 |
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| 引用本文： | 张永,何登发,刘长磊.塔里木盆地巴楚隆起的三维地质结构及成因机制[J].地学前缘,2019,26(1):134-148. |
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| 作者姓名： | 张永 何登发 刘长磊 |
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| 作者单位： | 中国地质大学(北京) 能源学院, 北京 100083 |
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| 基金项目： | 国家重点研发计划项目“大型沉积盆地深层结构、形成机制与油气潜力”专题(2017YFC0601405-03) |
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| 摘 要： | 塔里木盆地为中国西部大型克拉通盆地，巴楚隆起是塔里木盆地内部中央隆起带西部的一个重要构造单元，其所发育的边界断裂严格限制了巴楚隆起的范围，边界断裂的发育使得巴楚隆起的形成表现为一个复杂过程，探讨其形成过程及机制可为研究克拉通内变形特征及机制提供依据。文中借助于钻井及地震解释资料，刻画了巴楚隆起所发育的断裂特征及地质结构，并建立了其三维地质结构模型，结合大地构造背景及演化特征剖析了巴楚隆起的形成机制。通过研究，巴楚隆起在纵向上可识别出7个主要不整合面，并以此为界面，结合演化特征，将巴楚隆起自下而上划分为7个构造层；结合断裂带展布特征及地层构造形态，将巴楚隆起在平面上划分为西部断垒带、阿恰-吐木休克断裂带、海米罗斯-玛扎塔格断裂带、东部向斜带等4个次级构造单元；通过研究，巴楚隆起初始形成于晚奥陶世末期，晚二叠世末期强烈隆升，新近纪早期进一步隆升，上新世至第四纪时仍遭受挤压改造形成现今面貌，其形成演化主要受到边界断裂影响。
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| 关 键 词： | 巴楚隆起 构造地层层序 三维地质结构 成因机制 /> |
| 收稿时间： | 2018-05-08 |
Three-dimensional geological structure and genetic mechanism of the Bachu uplift in the Tarim Basin |
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| ZHANG Yong,HE Dengfa,LIU Changlei.Three-dimensional geological structure and genetic mechanism of the Bachu uplift in the Tarim Basin[J].Earth Science Frontiers,2019,26(1):134-148. |
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| Authors: | ZHANG Yong HE Dengfa LIU Changlei |
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| Institution: | School of Energy Resources, China University of Geosciences(Beijing), Beijing 100083, China; |
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| Abstract: | The Tarim Basin is a large craton basin developed in western China. The Bachu uplift is an important tectonic unit in western central uplift in the Tarim Basin. The boundary faults severely limit the range of the Bachu uplift. However, it is precisely the development of the boundary faults that makes the Bachu uplift formation a complex process. By exploring this formation process and its mechanism we can further study the characteristics and mechanism of deformation in the craton basin. In this work, we depicted the fault characteristics and geostructure of the Bachu uplift and built the tree-dimensional geological model based on drilling data and seismic interpretation. We further analyzed the formation mechanism of the Bachu uplift, taking into consideration of tectonic setting and evolutionary characteristics. The results show that seven major unconformities can be identified in the longitudinal direction, according to which, along with evolutionary characteristics, the Bachu uplift can be divided into seven tectonic layers. Based on the distribution characteristics of fault belt and stratigraphic tectonic configuration, the Bachu uplift is divided into four sub-tectonic units in the plane: western fault zone, Aqa-Tumuxiuke fault zone, Hemiros-Mazatag fault zone and eastern syncline zone. The Bachu uplift initially formed in the late Ordovician, was then strongly uplifted in the late Late Permian, and further uplifted in the early Neogene. During the Pliocene to Quaternary periods, the Bachu uplift was still subjected to extrusion transformation into the present form; its formation and evolution are mainly affected by the boundary faults. |
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| Keywords: | Bachu uplift tectonic-stratigraphic sequence three-dimensional geological structure genetic mechanism
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