| 中国大陆应变应力场研究 |
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| 引用本文： | 郭良迁,周海涛,杜雪松,塔拉.中国大陆应变应力场研究[J].华南地震,2012,32(1):1-10. |
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| 作者姓名： | 郭良迁 周海涛 杜雪松 塔拉 |
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| 作者单位： | 中国地震局第一监测中心,天津,300180 |
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| 基金项目： | 天津市应用基础研究项目资助 |
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| 摘 要： | 根据1999～2009年网络工程GPS观测资料计算得到的应变率参数,研究了中国大陆地壳的应变应力场及其地壳现今的水平活动特征。结果表明,中国大陆地壳西部青藏亚板块的压应力主方向围绕藏南和阿萨姆构造结向北、东、南依次辐射撒开。新疆亚板块自西向东由近SN向变为NE向。中国大陆东部地壳的压应力主方向自北向南由NEE变为近EW向,再变为SEE向。中国大陆主压应力作用强度西部显著大于东部。中国大陆地壳西部强于东部,南部强于北部,现今西部地壳以挤压、走滑为主,东部地壳既有挤压、走滑,也有拉张。
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| 关 键 词： | 应变应力场 主应变率 最大剪应变率 地壳活动性 |
Studies on Stress-strain Field of Chinese Mainland |
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| GUO Liangqian
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ZHOU Haitao
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DU Xuesong
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TA La.Studies on Stress-strain Field of Chinese Mainland[J].South China Journal of Seismology,2012,32(1):1-10. |
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| Authors: | GUO Liangqian ZHOU Haitao DU Xuesong TA La |
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| Institution: | (First Crust Monitoring and Application Center,China Earthquake Administration,Tianjin 300180,China) |
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| Abstract: | Base on the strain rate calculated by the network project GPS data obtained during 1999-2009,the characteristics of crustal stress filed,strain field and the horizontal activity of the crust were studied in Chinese mainland.The results show that the primary direction of compressive stress of Qinghai-Tibet(Western part of the continental crust of China) inferior plate tended to radial lines along the southern Tibet and the Assam tectonic node.The primary direction of Xinjiang inferior plate varies from SN to NE from West to East.The primary direction of crustal compressive stress of easten China varies from NEE to almost EW,and then varies to SEE from North to South.Obviously,the strength of main compressive stress in western China is stronger than in eastern China.The crustal activity of western China was stronger than that of eastern China,while the activity of southern China is stronger than that of northern China.The crustal activity of western China is mostly strike slip and compressive movement,while the crustal activity shows not only strike slip and compressive movement,but also extended movement in eastern China. |
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| Keywords: | Strain field stress field Primary strain rates Maximum shear strain rate The crustal activity |
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