| 全球板块运动对板块边界带应力场的影响 |
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| 引用本文： | 黄玺瑛,魏东平. 全球板块运动对板块边界带应力场的影响[J]. 中国科学院大学学报, 2004, 21(2): 227-232. DOI: 10.7523/j.issn.2095-6134.2004.2.012 |
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| 作者姓名： | 黄玺瑛 魏东平 |
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| 作者单位： | 1. 中国地震局地壳应力研究所, 北京 100039;2. 中国科学院研究生院计算地球动力学重点实验室, 北京 100085 |
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| 基金项目： | 国家自然科学基金资助项目(40274035;49804006);中国科学院研究生院院长基金资助(yzjj200112) |
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| 摘 要： | 将全球板块边界带分别按照不同的宽度加以界定,计算了全球板块边界应力场的长、短波分量,讨论了应力场短波分量对观测应力场的相对贡献,分析了其与板块边界相互运动类型的相关性.在收敛型边界带,俯冲板片推 (拉)力是驱动板块运动的主要力源,仅仅洋脊推力不能主导板块的应力场形态;同时,大陆板块之间的碰撞力对板块运动具有重要意义.计算结果还显示板块边界带参考半宽度以不大于 2 0 0km较为合适.
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| 关 键 词： | 板块边界带 应力场 短波分量 |
| 收稿时间： | 2003-03-17 |
| 修稿时间： | 2003-06-26 |
Global Plate Motions and the Influenceon the Stress Fields near the Plate Boundary Segments |
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| HUANG Xi-Ying,WEI Dong-Ping. Global Plate Motions and the Influenceon the Stress Fields near the Plate Boundary Segments[J]. , 2004, 21(2): 227-232. DOI: 10.7523/j.issn.2095-6134.2004.2.012 |
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| Authors: | HUANG Xi-Ying WEI Dong-Ping |
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| Affiliation: | 1. Computational Geodynamics Laboratory, Graduate School of the Chinese Academy of Sciences, Beijing 100039, China;2. Institute of Crustal Dynamics, China Seismological Bureau, Beijing 100085, China |
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| Abstract: | In this paper we determine the global plate boundary segments with different width and calculate thelong-wave and the shor-t wave components of the stress fields. We thus discuss the relative contribut ion of the shor-twave components to the stress f ield and analyze the relat ionship between contributions and the relative mot ions of theplate boundaries. The main plate driven forces come from the slab pull (or slab suction) on the convergent boundaries,and the ridge push forces cannot be the only control forces on the stress style of plates. The collision forcesbetween two cont inental plate boundaries play an important role in their motions. Our study shows that the reasonablereference hal-f width of boundary is less than-00 km. |
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| Keywords: | plate boundary segments stress field shor-t wave component |
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