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。
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．
出处
《地震地质》
EI
CSCD
北大核心
1995年第3期218-224,共7页
Seismology and Geology
关键词
断层活动
断层
位移速率
古地震
地震地质
：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
