| 甘孜玉树断裂带第四纪活动特征 |
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| 引用本文： | 彭华,马秀敏,白嘉启,杜德平.甘孜玉树断裂带第四纪活动特征[J].地质力学学报,2006,12(3):295-304. |
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| 作者姓名： | 彭华 马秀敏 白嘉启 杜德平 |
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| 作者单位： | 1. 北京科技大学土木与环境工程学院,北京,100083;中国地质科学院地质力学研究所,北京,100081
2. 中国地质科学院地质力学研究所,北京,100081 |
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| 基金项目： | 中国地质调查局区域地质调查项目 |
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| 摘 要： | 甘孜-玉树断裂带位于西金乌兰湖一玉树断裂带的南端，广义的鲜水河断裂向西北延伸的部分，是青藏高原川滇菱形块体向东挤出的北部边界，其结构较为复杂，根据其活动性的差异可分为3个段落：南段由一组斜列的左旋断裂组成，断裂活动形成甘孜左阶拉分盆地，岩桥区地震活动强烈；中段以强烈走滑运动为主，并在断裂北侧形成一系列断陷盆，现今无地震记录；北段自邓柯向北转折，由主干断裂及一系列羽状断裂斜截复合，且以左旋走滑为主，与断裂有关的断陷盆地都发育在断层的西侧，地震活动分散，且活动性较弱。断裂带上的玉树-竹庆段断层谷地是南水北调西线侧雅金沙江-雅砻江调水线路的必经之地，强烈的断层活动以及形成的宽广的构造破碎带，将给工程施工和工程运行带来巨大的困难。
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| 关 键 词： | 断裂带 第四纪 活动特征 |
| 文章编号： | 1006-6616（2006）03-0295-10 |
| 收稿时间： | 2006-04-10 |
| 修稿时间： | 2006年4月10日 |
CHARACTERISTICS OF QUATERNARY ACTIVITIES OF THE GARZ(E)-YUSHU FAULT ZONE |
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| PENG Hu,MA Xiu-min,BAI Jia-qi,DU De-ping.CHARACTERISTICS OF QUATERNARY ACTIVITIES OF THE GARZ(E)-YUSHU FAULT ZONE[J].Journal of Geomechanics,2006,12(3):295-304. |
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| Authors: | PENG Hu MA Xiu-min BAI Jia-qi DU De-ping |
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| Affiliation: | School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;Institute of Gromechanics, Chinese Academy of Geological Sciences, Beijing 100081, China,Institute of Gromechanics, Chinese Academy of Geological Sciences, Beijing 100081, China,Institute of Gromechanics, Chinese Academy of Geological Sciences, Beijing 100081, China and Institute of Gromechanics, Chinese Academy of Geological Sciences, Beijing 100081, China |
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| Abstract: | The Garze-Yushu fault zone, lying at the southern end of the Xijir Ulan Lake-Yushu fault zone, is the northwestward extension of the Xianshuihe fault sensu lato and the northern boundary of the eastward extrusion of the Sichuan-Yunnan rhombic block of the Qinghai-Tibet Plateau. Its structure is complicated. According to the difference in character of its activities, The south segment is composed of a set of echelon sinistral faults and it is divided into the fault activity three segments. gave rise to the Garze pull-apart basin. The seismic activity is strong at the Yanqiao area. The central segment is mainly characterized by strong strike-slip movement and a number of downfaulted basins occur at the north side of the fauh. There has been no earthquake record Dengke, consists of the principal fault and a until now. The north segment, which turns north from number of feather faults that intersect the main faults obliquely, with sinistral strike-slip faults predominating. The downfauhed basins related to the fault are located at the western side of the fault. The seismic activities are scattered and weak. The fault valley of the Yushu-Zhuqing segment of the fault zone is the only way for the water diversion line from the Jinsha River to Yarlung River in the west line of the south-north water diversion project, where strong fault activities and resulting wide fracture zone will cause great difficulty to the operations of the project. |
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| Keywords: | fault zone Quaternary characteristics of activity |
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