| 玉树断裂活动性研究 |
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| 引用本文： | 李闽峰 邢成起. 玉树断裂活动性研究[J]. 地震地质, 1995, 17(3): 218-224 |
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| 作者姓名： | 李闽峰 邢成起 |
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| 作者单位： | 国家地震局地质研究所，国家地震局兰州地震研究所，四川省地震局，青海省地震局 |
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| 摘 要： | 通过实地考察和室内工作，对玉树断裂的活动性进行了分段研究。该断裂划分为３段：（１）西北段全新世以来活动强烈，以水平左旋活动为主，水平滑动速率达７．３ｍｍ／ａ，沿断裂带展布大量的古地震事件遗迹；（２）中段第四纪以来的主体活动时段在晚更新世以前，以正断层活动为主；（３）东南段全新世以来活动强烈，以水平左旋活动为主，水平滑动速率约５ｍｍ／ａ，沿断裂带分布有大量的古地震事件遗迹，历史上记载的最大地震为１８９６年的邓柯７．０级地震
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| 关 键 词： | 断层活动 断层位移速率 古地震 |
RESEARCH ON ACTIVITY OF YUSHU FAULT |
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| Li Minfeng,Xing Chengqi,Cai Changxing,Guo Wenxiu,Wu Shuxue,Yuan Zhuzhong, Meng Yongqi,Tu Delong,Zhang Ruibin,Zhou Rongiun. RESEARCH ON ACTIVITY OF YUSHU FAULT[J]. Seismology and Geology, 1995, 17(3): 218-224 |
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| Authors: | Li Minfeng Xing Chengqi Cai Changxing Guo Wenxiu Wu Shuxue Yuan Zhuzhong Meng Yongqi Tu Delong Zhang Ruibin Zhou Rongiun |
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| Abstract: | After field investigation and lobaratory study，the Yushu fault can be separeted into threesegments from its activity in this paper. The northwestern segment of Yushu fault has undergonestrong horizontal movement since Q_4． Its maximum horizontal slip rate is 7．3mm／a. Theresome palaeoearthquakes occurred along this segment． The middle segment has been activated inearly Quaternary．The southeastern segment has undergone strong horizontal movement sinceQ_4. Its average horizontal slip rate is 5 mm／a，There many palaeoearthquakes occurred along thissegment．The maximum earthquake with magnitued of 7．0 took place at Dengke in 1896 |
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| Keywords: | Faulting Fault displacement rate Palaeoearhtquake (Institute of Geology SSB Beijing 100029．Earthquake Research institute of lanzhou SSB Lanzhou 730000．Seimological Breau of Sichuan Province Chengdou 610041．Sesmological Breau of Qinghai Provin |
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