| 印度-澳大利亚板块应力场数值模拟及其动力学分析 |
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| 引用本文： | 冯向东,刘卫华,魏东平.印度-澳大利亚板块应力场数值模拟及其动力学分析[J].地质力学学报,2006,12(4):429-440. |
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| 作者姓名： | 冯向东 刘卫华 魏东平 |
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| 作者单位： | 1. 河北省地震局分析预报中心,河北,石家庄,050021
2. 中国科学院研究生院计算地球动力学重点实验室,北京,100049 |
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| 摘 要： | 印度-澳大利亚板块的边界类型和性质十分复杂。本文采用伪三维有限元方法，利用WSM2000观测应力场数据的应力取向和应力状态作为主要约束，建立了印度-澳大利亚板块岩石层三维模型，对印度-澳大利亚板块构造应力场进行了数值模拟，进而探讨印度-澳大利亚板块所受边界力对板块内部应力场的影响。结果显示，印度-澳大利亚板块的构造应力场主要受到两个因素的控制：①软流层静压推力；②来自碰撞带的阻力，包括喜马拉雅、巴布亚新几内亚、新西兰和印度-澳大利亚板块与欧亚板块的西北边界。而来自俯冲消减带的拉张作用力对板内应力场的作用相对较小。
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| 关 键 词： | 印度-澳大利亚板块 应力状态 有限元方法 动力学模拟 |
| 文章编号： | 1006-6616（2006）04-0429-12 |
| 收稿时间： | 2005-09-27 |
| 修稿时间： | 2005年9月27日 |
NUMERICAL SIMULATION AND DYNAMIC ANALYSIS OF THE STRESS FIELD OF THE INDO-AUSTRALIAN PLATE |
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| FENG Xiang-dong,LIU Wei-hu,WEI Dong-ping.NUMERICAL SIMULATION AND DYNAMIC ANALYSIS OF THE STRESS FIELD OF THE INDO-AUSTRALIAN PLATE[J].Journal of Geomechanics,2006,12(4):429-440. |
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| Authors: | FENG Xiang-dong LIU Wei-hu WEI Dong-ping |
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| Institution: | Seismological Bureau of Hebei Province, Shijiazhuang 050021, Hebei,Computational Geodynamics laboratory, Graduate School, Chinese Academy of Sciences, Beijing 100049 and Computational Geodynamics laboratory, Graduate School, Chinese Academy of Sciences, Beijing 100049 |
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| Abstract: | The types and nature of the Indo-Australian plate are very complex.A 3D lithosphere model of the Indo-Australian plate is constructed and numerical simulation of the tectonic stress field of the Indo-Australian plate is performed by using the pseudo-3D finite element method and adopting the WSM2000 observed stress data and stress state as constraints,and then the influence of the boundary forces applied at the Indo-Australian plate on the intraplate stress field is discussed.The results show that the intraplate tectonic stress field of the IndoAustralian plate is mainly controlled by two factors:(1) the asthenospheric static push;and(2) the resistance coming from collision zones,including Himalaya,Papua New Guinea,New Zealand and the northwestern boundary between the Indo-Australian plate and Eurasian plate.However,the effect of the extensional forces from the subduction zone on the intraplate stress field is relatively small. |
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| Keywords: | Indo-Australian plates stress state finite element method dynamic simulation |
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