| 论中国西北某些地区的高导电层及地震区划的深部电性指标. |
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| 引用本文： | 林长佑,刘晓玲,蒋梅,武玉霞.论中国西北某些地区的高导电层及地震区划的深部电性指标.[J].地震学报,1988,10(1):66-76. |
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| 作者姓名： | 林长佑 刘晓玲 蒋梅 武玉霞 |
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| 作者单位： | 国家地震局兰州地震研究所 |
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| 摘 要： | 本文分析研究了中国西北某些地区地壳上地幔內的五类高导电层的分布及横向变化,探讨了其性质、成因及其与地震的关系。以中国南北地震带(北段)为例,探讨了圈划地震带轮廓的深部电性标志;分析了地壳上地幔电导率分布所揭示的地震活动深部物理环境的某些问题,尝试给出了地震带內地震危险区划分的几个深部电性指标,以及利用这些电性指标进行地震危险区划分的实施方法。
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| 关 键 词： | 大地电磁测深 地震危险区划 高导电层 深部电性指标 中国南北地震带北段 |
ON THE CONDUCTIVE LAYERS IN SOME REGIONS OF NORTHWESTERN CHINA AND THE DEEP ELECTRICAL INDEXES FOR SEISMOLOGICAL ZONING |
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| Affiliation: | Lanzhou Seismological Institute, State Seismological Bureau |
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| Abstract: | In this paper distributions and lateral changes of five kinds of conductive layers in the crust and upper mantle of Northwestern China are studied; their properties, origins and relations to earthquakes are discussed. Taking the northern portion of the North-South Seismic Belt of China as an example, the deep electrical indexes for delineating the contours of the seismic belt are discussed, and their roles in earthquake activity explained. Analysing some problems of the deep physical circumstance relative to earthquake activity, revealed by the conductivity distributions in the crust and upper mantle, the ability of various deep electrical parameters, as indexes for earthquake risk zoning is discussed; and a method for delineating regions of seismic risk using the above mentioned indexes is given. |
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