| 华北与东南沿海地区岩石介质差异性研究 |
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| 引用本文： | 滕春凯,安镇文.华北与东南沿海地区岩石介质差异性研究[J].岩石学报,2002,18(4):489-494. |
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| 作者姓名： | 滕春凯 安镇文 |
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| 作者单位： | 1. 中国科学院地质与地球物理研究所,北京,100101
2. 中国地震局地球物理研究所,北京,100081 |
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| 基金项目： | 国家重点基础研究发展规划项目(编号 :G2 0 0 0 0 4 6 7- 0 1 )资助 |
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| 摘 要： | 通过地震活动性特征研究了华北与东南沿海地区岩石介质差异性，以唐山、海域及福建地区为例，计算了上述地区的视应力降和环境应力背景值，并用分形理论中的标度揭示了这种差异性的定量特征。结果表明，在华北地区（唐山与海城），环境应力值有强烈的涨落，而东南沿海地区（福建）其涨落并不明显，从而揭示了华北与东南沿海地区地壳岩石介质的差异性。这意味着上述地区的动力学特征在板块构造力作用下存在明显的差异。最后，应用动力学观点讨论了上述变化的复杂性和可能存在的问题。
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| 关 键 词： | 环境应力 视应力降 地震活动性 岩石介质 标度 板块构造力作用 |
| 文章编号： | 1000-0569/2002/018(04)-0489-94 |
| 修稿时间： | 2002年6月28日 |
Studies on the difference of rock medium properties in north China and southeast China coastal areas. |
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| TENG ChunKai,and AN ZhenWen.Studies on the difference of rock medium properties in north China and southeast China coastal areas.[J].Acta Petrologica Sinica,2002,18(4):489-494. |
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| Authors: | TENG ChunKai and AN ZhenWen |
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| Institution: | TENG ChunKai and AN ZhenWen . Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,China . Institute of Geophysics,China Seismological Bureau,Beijing,China |
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| Abstract: | The differences, in this paper, of the rock medium properties in north China and southeast China coastal areas are studied by seismicity method. The ap parent stress drop and ambient stress values of seismic activities in areas ment ioned above are also calculated. The quantitative characteristics for their diff erences are described by using fractal theory. The results showed that the ambie nt stress values obviously experiense fluctuations in north China (Haicheng of T angshang) areas, but does not change obviously in southeast China coastal (Fuji an) areas. It reveals that the rock medium features are different between the n orth China and south east China coastal areas. And it means that the dynamic characteristics under the control by the plate structure in areas mentioned above are different, espe cially, the rock properties of the thin crust possibly depend on the depth.Finally, the complexity of variation in three areas is discussed based on the po int of dynamic view. In the meantime, problems possibly existing are also discu ssed. |
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| Keywords: | Ambient stress Apparent stress drop Seismicity Rock medium Scaling |
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