| Rupture Property of the 1927 Gulang Ms8.0 Earthquake and Numerical Simulation of Rupture Mechanism |
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| 作者姓名： | Zheng Wenjun Yuan Daoyang Zhang Dongli He Wengui Guo Hua Liu Baichi |
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| 作者单位： | Zheng Wenjun 1，2)，Yuan Daoyang 1，2)，Zhang Dongli 1，2，3)，He Wengui 1，2)，Guo Hua 1，2) and Liu Baichi 2) 1) Lanzhou Base of Institute of Earthquake Science，CEA，Lanzhou 730000，China 2) Lanzhou Institute of Seismology，CEA，Lanzhou 730000，China 3) Harbin Institute of Technology，CEA，Harbin 150083，China |
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| 基金项目： | The work was sponsored by the Joint Earthquake Science Foundation of China Earthquake Administration （Item Number ： 102055, 604018）, Contribution Number ： LC2004005 1 of Lanzhou Base of Institute of Earthquake Prediction, CEA. |
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| 摘 要： | INTRODUCTIONThe1927GulangMS8.0earthquake is a severe earthquake followed the HaiyuanMS8.5earthquake of1920inthe Qilian Mt._Hexi Corridor earthquake zone.The most severely hit region wasaround Gulang and Liangzhou(the present Wuwei)of Gansu Province,with a…
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| 关 键 词： | 地震 数值模拟 地质断裂 推覆体 |
| 收稿时间： | 2003-12-15 |
| 修稿时间： | 2004-09-26 |
Rupture Property of the 1927 Gulang Ms8.0 Earthquake and Numerical Simulation of Rupture Mechanism |
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| Zheng Wenjun Yuan Daoyang Zhang Dongli He Wengui Guo Hua Liu Baichi.Rupture Property of the 1927 Gulang Ms8.0 Earthquake and Numerical Simulation of Rupture Mechanism[J].Earthquake Research in China,2005,19(4):409-419. |
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| Authors: | Zheng;Wenjun;Yuan;Daoyang;Zhang;Dongli;He;Wengui;Guo;Hua;Liu;Baichi |
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| Abstract: | The 1927 Gulang M_S8.0 earthquake is a severe earthquake that followed the Haiyuan M_S8.5 earthquake of 1920 in the Qilian Mt._Hexi Corridor earthquake zone. There are divergences of opinion in the previous studies about the rupture properties of the earthquake. Based on trenching and field investigation, and analysis of historical data, we hold that the earthquake resulted from the joint process of the Tianqiaogou_Huangyangchuan fault, Dongqingding segment of the Huangcheng_Shuangta fault and the Wuwei_Tianzhu buried fault, which constitute the Gulang nappe. By finite_element numerical simulation on the deformation mechanism of Gulang nappe, it is found that the stress and strain mainly concentrate in the western segment of the Tianqiaogou_Huangyangchuan fault, the Dongqingding segment of the Huangcheng_Shuangta fault, and the Gulangxia segment of the Wuwei_Tianzhu buried fault and the Gulang_Shuangta fault. The stress concentration coincides with the distribution of the earthquake surface rupture. It also proves that the earthquake is an outcome of the Gulang nappe activity as a whole. |
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| Keywords: | Gulang Rupture zone Nappe structure Finite-element method Numerical simulation |
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