| 乌泊尔断裂带构造几何学与运动学 |
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| 引用本文： | 陈槚俊,何登发.乌泊尔断裂带构造几何学与运动学[J].地质科学,2018,0(1):25-45. |
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| 作者姓名： | 陈槚俊 何登发 |
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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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| 摘 要： | 乌泊尔断裂带位于帕米尔构造结东北缘，作为揭示青藏高原形成与演化历史的关键地区之一，为碰撞造山作用提供了详细信息，因此厘清乌泊尔断裂带关键构造的形成演化具有重要意义。为研究该断裂带的几何学与运动学特征，本文利用钻测井资料、二维地震反射资料、DEM 高程资料以及喀什地区1∶100 000地质图，以断层相关褶皱理论为指导，对乌泊尔断裂带进行精细构造解析。研究认为，乌泊尔断裂沿走向至少可分为东、西两段，西段构造变形强烈，而东段较弱，构造样式沿断裂走向上有较大差异；垂直于构造走向上可划分出两个等倾角区；乌泊尔地区的变形最早于中新世早期开始，自上新世以来构造变形强烈，乌泊尔断裂在该区域的活动起始于第四纪，具有幕式活动的特点；通过断层相关褶皱分析得到，自中新世至上新世，断裂东段的构造缩短量至少为9.47 km，第四纪以来的构造缩短量至少为11.65 km。第四系生长地层的内部结构受控于基底叠瓦构造和乌泊尔断裂，明确深浅构造的关系能较好得限定研究区关键构造的形成演化过程，可作为复杂构造解析的有效方法。
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| 关 键 词： | 帕米尔乌泊尔 断裂带 断层相关褶皱理论 几何学 运动学 |
| 收稿时间： | 2017-07-10 |
| 修稿时间： | 2017-07-10; |
Geometry and kinematics of Pamir frontal thrust zone |
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| Chen Jiajun He Dengfa.Geometry and kinematics of Pamir frontal thrust zone[J].Chinese Journal of Geology,2018,0(1):25-45. |
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| Authors: | Chen Jiajun He Dengfa |
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| Institution: | School of Energy Resources, China University of Geosciences, Beijing 100083 |
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| Abstract: | Based on drilling data, logging information, 2D seismic data, geological map at a scale of 1∶100 000 and Digital Elevation Model （DEM） data, guided by fault related folding theory, this paper mainly analyzes the geometry and kinematics of Pamir frontal thrust zone, which is located at northeastern margin of Pamir salient. Pamir salient as the key area that reveals the formation and evolution of Tibet Plateau, provides detailed information of collision and orogeny. Therefore, it is significant determining the development of key structures. Our study suggests that Pamir frontal thrust can be divided into 2 segments along the fault strike and 2 dip domains. West segment is strongly deformed while east segment is not and the structural styles are quite different among two segments. The collision began at Early Miocene in this area and strongly deformed after Pliocene. Pamir frontal thrust in this area initiated at Quaternary and is characterized by episodic activity. Analyzed by fault related folding theory, the shortening from Miocene to Pliocene is more than 9.47 km, the shortening during Quaternary is at least 11.65 km. The structure of Quaternary growth strata is controlled by imbricates and Pamir frontal thrust. Evolution of the key structures can be determined by finding out relation between shallow and deep structure. It is an effective method in complicated structural analysis. |
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| Keywords: | Pamir salient Pamir frontal thrust Fault Related Folding theory Geometry Kinematics |
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