| 基于观测应力场的大华北地区动力学机制探讨 |
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| 引用本文： | 冯向东,魏东平,陈棋福.基于观测应力场的大华北地区动力学机制探讨[J].地震学报,2005,27(1):1-10. |
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| 作者姓名： | 冯向东 魏东平 陈棋福 |
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| 作者单位： | 中国北京,100039,中国科学院研究生院计算地球动力学重点实验室;中国石家庄,050021,河北省地震局分析预报中心;中国北京,100039,中国科学院研究生院计算地球动力学重点实验室;中国北京,100036,中国地震局地震预测研究所 |
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| 基金项目： | 国家自然科学基金，中国科学院院长基金 |
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| 摘 要： | 采用伪三维有限元方法， 利用观测应力场应力取向和应力状态作为主要约束， 对华北地区的构造应力场进行了数值模拟. 结果显示， 华北地区应力场主要受到来自太平洋板块和青藏高原挤压作用的控制. 太平洋板块的北西西向的挤压作用对这一地区, 尤其是华北平原地区构造应力场的影响更大. 同时， 上涌地幔沿盆地边缘法线方向的引张， 对这一地区的应力场的形成也起到一定的作用.
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| 关 键 词： | 大华北地区 应力状态 有限元方法 动力学模拟 |
| 文章编号： | 0253-3782(2005)01-0001-10 |
| 修稿时间： | 2003年10月20 |
DISCUSSION ON THE DYNAMIC MECHANISM OF GREAT NORTH CHINA AREA BASED ON THE OBSERVED STRESS DATA |
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| Feng Xiangdong Wei Dongping Chen Qifu Laboratory of Computational Geodynamics,Graduate School of Chinese Academy of Sciences,Beijing ,China Institute of Earthquake Science,China Earthquake Administration,Beijing ,China Earthquake Administration of Hebei Province,Shijiazhuang ,China.DISCUSSION ON THE DYNAMIC MECHANISM OF GREAT NORTH CHINA AREA BASED ON THE OBSERVED STRESS DATA[J].Acta Seismologica Sinica,2005,27(1):1-10. |
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| Authors: | Feng Xiangdong Wei Dongping Chen Qifu Laboratory of Computational Geodynamics Graduate School of Chinese Academy of Sciences Beijing China Institute of Earthquake Science China Earthquake Administration Beijing China Earthquake Administration of Hebei Province Shijiazhuang China |
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| Institution: | Feng Xiangdong 1) Wei Dongping 2) Chen Qifu 3) 1) Laboratory of Computational Geodynamics,Graduate School of Chinese Academy of Sciences,Beijing 100039,China2) Institute of Earthquake Science,China Earthquake Administration,Beijing 100036,China3) Earthquake Administration of Hebei Province,Shijiazhuang 050021,China |
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| 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 3 D 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 Qinghai Xizang Plateau, especially the WNW ward action from the Pacific Plate play a more important role in North China plain block. At the same time, the extension action by the mantle upwelling in the perpendicular direction to the basin margins also definitely affects the forming of the stress fields in North China plain area. |
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| Keywords: | Great North China area stress regime finite element method dynamic simulation |
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