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| Discussion on the dynamic mechanism of Great North China area based on the observed stress data | |
| 作者姓名： | 冯向东 魏东平 陈棋福 |
| 作者单位： | Computational Geodynamics Laboratory，Graduate School of Chinese Academy of Sciences，Computational Geodynamics Laboratory，Graduate School of Chinese Academy of Sciences，Institute of Earthquake Science，China Earthquake Administration Beijing 100039，China，Earthquake Administration of Hebei Province，Shijiazhuang 050021，China，Beijing 100039，China，Beijing 100036，China |
| 基金项目： | National Natural Science Foundations of China (No. 40274035)，Research Foundation of Graduate School of Chi-nese Academy of Sciences (yzjj200112). |
| 摘 要： | Introduction The Great North China, located at longitude 106E to 124E and latitude 31N to 42N, in-cludes three secondary active tectonic blocks, Ordos, Yanshan and North China plain (Figure 1). The geological tectonics of these three secondary blocks is much different from each other. As a stable block with high rigidity, the Ordos block is mostly surrounded by down-faulted basins with an inactive interior since Cenozoic, although the fault zones along its boundary are strongly active wi… |
| 收稿时间： | 20 October 2003 |
| 修稿时间： | 14 September 2004 |
Discussion on the dynamic mechanism of Great North China area based on the observed stress data |
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| Feng Xiang-dong , Wei Dong-ping and Chen Qi-fu.Discussion on the dynamic mechanism of Great North China area based on the observed stress data[J].Acta Seismologica Sinica(English Edition),2005,18(1):1-11. | |
| Authors: | Feng Xiang-dong Wei Dong-ping and Chen Qi-fu |
| Affiliation: | 1. Computational Geodynamics Laboratory, Graduate School of Chinese Academy of Sciences, Beijing 100039, China;Earthquake Administration of Hebei Province, Shijiazhuang 050021, China 2. Computational Geodynamics Laboratory, Graduate School of Chinese Academy of Sciences, Beijing 100039, China 3. Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China |
| Abstract: | Based on the constrained data from the observed stress orientation and the observed stress regime, the tectonic stress fields of the Great North China area has been simulated by using the pseudo-3D finite element method. The results indicate that the stress fields in this area are basically controlled by the push forces coming from the Pacific Plate and from the Tibet Plateau, and the WNW-ward action from the Pacific Plate play a more important role in North China plain block. In addition to that, the stress field in this area is also partly formed by the extension ac-tion from the mantle upwelling in perpendicular at the basin margins. |
| Keywords: | Great North China area stress regime finite element method dynamic simulation |
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