RESEARCH ON ACTIVITY OF YUSHU FAULT

SEISMOLOGY AND GEOLOGY ›› 1995, Vol. 17 ›› Issue (3): 218-224.

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RESEARCH ON ACTIVITY OF YUSHU FAULT

Li Minfeng¹, Xing Chengqi², Cai Changxing³, Guo Wenxiu¹, Wu Shuxue⁴, Yuan Zhuzhong¹, Meng Yongqi¹, Tu Delong⁴, Zhang Ruibin⁴, Zhou Rongiun³

Received:1993-04-30 Revised:1995-03-31 Online:1995-09-06 Published:2009-11-25

玉树断裂活动性研究

李闽峰¹, 邢成起², 蔡长星³, 国文秀¹, 邬树学⁴, 袁著忠¹, 孟勇琦¹, 涂德龙⁴, 张瑞斌⁴, 周荣军³

1. 国家地震局地质研究所, 北京 100029;
2. 国家地震局兰州地震研究所, 兰州 730000;
3. 四川省地震局, 成都 610041;
4. 青海省地震局, 西宁 810001

Abstract

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 Q₄. 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 sinceQ₄. 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.

Key words: Faulting, Fault displacement rate, Palaeoearhtquake

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。

关键词: 断层活动, 断层位移速率, 古地震

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.

李闽峰, 邢成起, 蔡长星, 国文秀, 邬树学, 袁著忠, 孟勇琦, 涂德龙, 张瑞斌, 周荣军. 玉树断裂活动性研究[J]. 地震地质, 1995, 17(3): 218-224.

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RESEARCH ON ACTIVITY OF YUSHU FAULT

玉树断裂活动性研究

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