| 龙门山中段彭灌断裂带汶川Ms8.0地震同震破裂断层识别及其浅、表构造特征 |
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| 引用本文： | 鲁人齐,何登发,JohnSuppe,孟征,高金尉,贺鸿冰.龙门山中段彭灌断裂带汶川Ms8.0地震同震破裂断层识别及其浅、表构造特征[J].地质科学,2011,0(3):607-619. |
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| 作者姓名： | 鲁人齐 何登发 JohnSuppe 孟征 高金尉 贺鸿冰 |
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| 作者单位： | 1.中国地质大学（北京）能源学院 北京 100083； 2.台湾大学地球科学系 台北 13-318 |
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| 基金项目： | 国家重点基础研究发展计划项目，国家自然科学基金重点项目 |
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| 摘 要： | 2008年汶川Ms8.0地震在龙门山中段的彭灌断裂带产生的地表破裂,是该地震产生的第二大地表破裂带.综合应用地质、钻井以及二维、三维地震数据,利用横贯前山带的多条人工地震反射剖面,对彭灌断裂带产生同震破裂的断层进行准确识别和解释.研究表明,龙门山中段的彭灌断裂带是一套由3条主要断层和次级广泛发育的断裂组合构成,浅层表现...
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| 关 键 词： | 地震解释 轴面分析 地表破裂 同震破裂断层 彭灌断裂带 龙门山中段 |
| 收稿时间： | 2011-03-18 |
Distinguish the co-seismic fault of the Ms8.0 Wenchuan earthquake from the Pengguan thrust belt and analyse its shallow structures in the central Longmen Mountains |
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| Lu Renqi,He Dengfa,JohnSuppe,Meng Zheng,Gao Jinwei,He Hongbing.Distinguish the co-seismic fault of the Ms8.0 Wenchuan earthquake from the Pengguan thrust belt and analyse its shallow structures in the central Longmen Mountains[J].Chinese Journal of Geology,2011,0(3):607-619. |
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| Authors: | Lu Renqi He Dengfa JohnSuppe Meng Zheng Gao Jinwei He Hongbing |
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| Institution: | 1.College of Energy Resources, China University of Geosciences, Beijing 100083;2.The Department of Geosciences, Taiwan University, Taibei 13-318 |
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| Abstract: | TheMS80 Wenchuan，China，earthquake ruptured two large thrust faults along the Longmen Mountains thrust belt.Between them，the co seismic fault in Pengguan thrust belt created the second longest surface ruptures.In this paper，in order to distinguish the co seismic fault in Pengguan thrust belt，the fine interpretation of seismic profiles in the central Longmen Mountains have been accomplished by take advantage of geology map，drilling data and 2D/3D seismic reflection profiles，Our studies found that the Pengguan thrust belt have three main faults and another branch faults.The main faults are developing imbricated structure in the shallow strata and among them are developing the duplex.The co seismic fault which made the surface ruptures in the Pengguan thrust belt is the ③ fault，that is also the largest fault in the front of central Longmen Mountains.These faults are formed with flat and ramp and they are steep at the surface but the angle dip decreased with the depth increasing.Our studies indicated that these fault were generating in the Late Triassic period，developing in the Late Jurassic period and keeping on activity in the Cenozoic period.According to characteristics of geology，the main fault and the co seismic surface ruptures，the front of central Longmen Mountains can be divided into two sub segments，one is the Bailu area and the other is Hanwang area.The characteristics of shallow structures in the Pengguan thrust belt could provide some details and restriction for the research of faults in the front central Longmen Mountains. |
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| Keywords: | Seismic interpretation Axial analysing Surface ruptures Co-seismic fault Pengguan thrust belt Central Longmen Mountains |
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