| 青藏高原北部大型走滑断裂带近地表地质变形带特征分析 |
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| 引用本文： | 徐锡伟,于贵华,陈桂华,李陈侠,张兰凤,Yann Klinger,Paul Tapponnier,刘静. 青藏高原北部大型走滑断裂带近地表地质变形带特征分析[J]. 地震地质, 2007, 29(2): 201-217. DOI: CNKI:SUN:DZDZ.0.2007-02-001 |
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| 作者姓名： | 徐锡伟 于贵华 陈桂华 李陈侠 张兰凤 Yann Klinger Paul Tapponnier 刘静 |
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| 作者单位： | 中国地震局地质研究所,北京,100029;Institut de Physique du Globe,75005 Paris,France;中国科学院青藏高原研究所,北京,100085 |
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| 基金项目： | 国家发展与改革委员会发改投资项目 |
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| 摘 要： | 阿尔金断裂带、东昆仑断裂带和海原断裂带是青藏高原北部的大型左旋走滑断裂带,具有相对高的地质和GPS滑动速率,地表破裂型地震频发。在阿尔金断裂带阿克塞老城西和半果巴、东昆仑断裂带西大滩和玛沁、海原断裂带松山等地点的探槽地质剖面揭露了这些走滑断裂带累积地质变形带的基本特征。阿尔金断裂带半果巴探槽和阿克塞老城西探槽、东昆仑断裂带西大滩探槽和玛沁探槽揭露出的地质变形带宽度约12m左右;海原断裂带松山拉分盆地边界单条走滑断层地质变形带宽度不足10m,考虑到地震期间拉分盆地可能会出现较严重的变形,则拉分盆地本身也应作为强变形带处理。由此可见,经历过多个地震地表破裂循环的东昆仑断裂带、海原断裂带和阿尔金断裂带其地质变形带的宽度是有限的,具有变形局部化特征。单条走滑断层的地质变形带宽度一般为10余米,比较保守地估计应<30m,走滑断层斜列阶区的地质变形带宽度取决于阶区本身的宽度
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| 关 键 词： | 地质变形带 走滑断层 阿尔金断裂带 东昆仑断裂带 海原断裂带 青藏高原 |
| 文章编号： | 0253-4967（2007）02-0201-17 |
| 收稿时间： | 2007-06-09 |
| 修稿时间： | 2007-05-10 |
NEAR-SURFACE CHARACTER OF PERMANENT GEOLOGIC DEFORMATION ACROSS THE MEGA-STRIKE-SLIP FAULTS IN THE NORTHERN TIBETAN PLATEAU |
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| XU Xi-wei,YU Gui-hua,CHEN Gui-hua,LI Chen-xia,ZHANG Lan-feng,Yann Klinger,Paul Tapponnier,LIU Jing. NEAR-SURFACE CHARACTER OF PERMANENT GEOLOGIC DEFORMATION ACROSS THE MEGA-STRIKE-SLIP FAULTS IN THE NORTHERN TIBETAN PLATEAU[J]. Seismology and Geology, 2007, 29(2): 201-217. DOI: CNKI:SUN:DZDZ.0.2007-02-001 |
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| Authors: | XU Xi-wei YU Gui-hua CHEN Gui-hua LI Chen-xia ZHANG Lan-feng Yann Klinger Paul Tapponnier LIU Jing |
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| Affiliation: | 1.Institute of Geology, China Earthquake Administration, Beijing 100029, China ;lnstitut de Physique du Globe, 75005 Paris, France ;Institute of Tibet Plateau Research, Chinese Academy of Sciences, Beijing 100085, China |
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| Abstract: | The Altyn Tagh,Kunlun and Haiyuan Faults are three major left-lateral strike-slip faults with high geologic and GPS-derived horizontal slip rates as well as frequent surface-rupturing earthquakes in the northern Tibetan Plateau.There exist local structures,such as pull-apart basins in stepovers and sag ponds,where fine-grained and/or organic interfaulting sediments have been continuously filled and co-seismic faulting traces have been well preserved in those sediments.Trenching across the strike-slip faults |
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| Keywords: | Geologic deformation zone strike-slip fault Altyn Tagh Fault Kunlun Fault Haiyuan Fault Qinghai-Tibetan Plateau |
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