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地质科学  2018, Vol. 53 Issue (1): 115-132    DOI: 10.12017/dzkx.2018.007
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吐木休克构造带构造模型新解
张    永    刘长磊
中国地质大学(北京)能源学院北京 100083
A new interpretation of tectonic model of Tumuxiuke structure belt
Zhang Yong    Liu Changlei
School of Energy Resources, China University of Geosciences, Beijing 100083
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摘要 

吐木休克构造带位于塔里木盆地巴楚隆起北缘,为巴楚隆起和北部阿瓦提凹陷的分界,其形成与巴楚隆起的成因密切相关,作为克拉通内部发育的大型断裂,其构造活动一直持续至现今,探讨其形成过程及成因机制对于研究克拉通内部构造变形样式及成因具有重要意义。本文立足于前人研究成果和认识,以近垂直于吐木休克断裂带走向的二维地震资料为基础,运用断层相关褶皱理对相应剖面进行了轴面及等倾角域划分及断层识别,刻画了吐木休克构造带的二维几何学特征,并利用三维建模技术建立了其三维几何学形态;利用平衡剖面技术,分析了吐木休克构造带的构造演化,揭示了其运动学特征;结合其运动特征及前人研究成果,探讨了其成因机制。研究认为吐木休克构造带具有多层滑脱的特征,整体上具有西段构造活动强烈,向东逐渐减弱的特征;吐木休克断裂带在各段其构造样式较为一致,为由基底两套滑脱层及反冲断层组成的复合构造楔;构造带初始形成于中晚奥陶世并长期继承性活动,生长地层及地层的缺失情况指示构造带的形成过程可主要分为3 个期次,其中以中晚二叠—白垩纪的构造活动最为强烈,为吐木休克构造带的主要形成期,新生代的构造活动具有走滑性质。

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张永 刘长磊
关键词吐木休克构造带   构造模型   复合构造楔   成因机制     
Abstract

The tectonic belt is located in the northern margin of the Bachu uplift in the Tarim Basin, which is closely related to the cause of the Bachu uplift. As the large fault in the craton interior, its tectonic activity continues to present day. It′s of great significance to study the internal tectonic deformation and its causes in the study of craton. Based on previous study, two-dimensional seismic data which is perpendicular to the trend of Tumuxiuke fault belt is used in this article. The fault-related fold is used to distinguish the axial and isometric regions, then the two-dimensional geometric characteristic of the tectonic belt are described. And the three-dimensional geometric morphology was established by using the three-dimensional modeling technique. The tectonic evolution of the tectonic belt was analyzed by using the equilibrium profile technique, and its kinematic characteristics were revealed. The genetic mechanism is explored by the movement characteristics and previous research results. It is found that the Tumuxiuke tectonic belt has the characteristics of multi-layer slip, which has the characteristics of strong tectonic activity in the western section and gradually weakened eastward. The tectonic pattern of Tumuxiuke fault belt is coincident in each section, and can be interpreted as a composite structural wedge consisting of two set of slip-off layers and recoil faults. The structural belt is initially formed in the Late Ordovician and long-term inherited activity. The growth strata and the missing strata indicate that the formation process of the tectonic belt can be divided into three periods. The tectonic activity in the Middle and Late Permian to Cretaceous is the strongest, and it is the main formation period of the Tumuxiuke structure belt. The Cenozoic tectonic activity has a strike-slip nature.

Key wordsTumuxiuke tectonic belt   Structural model   Composed structural wedge   Causal mechanism   
收稿日期: 2017-07-10;
基金资助:

中国地质调查局油气资源调查中心项目(编号:D216069)

作者简介: 张永, 男, 1987 年12 月生, 博士研究生, 矿产普查与勘探学专业。E-mail:zhangyong0620@126.com
引用本文:   
张永 刘长磊. 2018, 吐木休克构造带构造模型新解. 地质科学, 53(1): 115-132.
Zhang Yong Liu Changlei. A new interpretation of tectonic model of Tumuxiuke structure belt[J]. Chinese Journal of Geology, 2018, 53(1): 115-132.
 
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