Surface Rupture Characteristics, Rupture Mechanics, and Rupture Process of the Yushu Earthquake (MS7.1), 14/04/2010
详细信息
- 责任者：Pan Jiawei (State Key Laboratory for Continental Tectonics and Dynamics ; Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Li Haibing
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(11)
- 关键词：玉树地震2010 ; Yushu earthquake 2010 ; 破裂强度 ; fracture strength ; 青海 ; Qinghai Province
- 页码：p.3449-3459
- 图表：8 illus., 1 table, 33 refs.
- 分类号：0500
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Based on the field investigation and measurements,the characteristics of the Yushu earthquake surface ruptures and coseismic displacements and their distribution pattern were analyzed.The earthquake rupture mechanism and the rupture process were discussed.According to our research,the following understandings were obtained: 1) the Yushu earthquake produced two surface ruptures along the northwest section of the Xianshuihe fault (Ganzi-Yushu fault); 2) field measurements show that the maximum coseismic displacement for the Yushu earthquake is 2.3 m,located at the center of the eastern surface rupture,near the Guoyangyansongduo village; 3) the characteristics of the surface rupture as well as field tectonic geomorphology indicate that the ruptured fault is developed in transtensional setting; and 4) seismic data invertion result and the distribution of the surface rupture show that the Yushu earthquake consist of two sub-events,which formed the Longbao lake surface rupture zone and Zhaqu River-Batang River surface rupture zone, respectively.
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