| 中国辽南地区地壳与上地幔介质的横向不均匀性与海城7.3级地震s |
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| 引用本文： | 卢造勋,刘国栋.中国辽南地区地壳与上地幔介质的横向不均匀性与海城7.3级地震s[J].地震学报,1990,12(4):367-378. |
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| 作者姓名： | 卢造勋 刘国栋 |
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| 作者单位： | 1. 辽宁省地震局
2. 国家地震局地质研究所 |
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| 摘 要： | 近几年来,在辽南地区开展深部地球物理探测的基础上,通过对深地震测深、大地电磁测深、重力、航磁、大地热流等综合地球物理资料对辽南地区地壳与上地幔介质进行不同物性的正、反演计算与研究,获得了辽南地区地壳与上地幔介质的速度结构、电性结构、密度结构和温度结构,揭示了该区介质的横向不均匀性及其重要特征.发现在海城地震区一带,存在壳内低速、高导、低密度、高热流等一系列重大地球物理异常,在空间上与震源区存在相当好的一致关系,对分析大震的震源物理过程提供了重要实际依据.
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| 关 键 词： | 地壳与上地幔 横向不均匀性 低速层 高导层 海城地震 |
LATERAL INHOMOGENEITY OF CRUST AND UPPER MANT-LE IN SOUTH LIAONING,CHINA AND ITS RELATIONSHIP WITH THE M 7.3 HAICHENG EARTHQUAKE |
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| Affiliation: | 1. Seismological Bureau of Liaoning Province;
2. Geological Institute of State Seismological Bureau |
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| Abstract: | Based on geophysical explorations conducted in South Liaoning,China in recend years,the velocity structure,electric structure,density structure and thermal structure,of the crust and upper mantle in South Liaoning have been obtained. The lateral inhomogeneity of the important characteristics of the deep medium in this area have been set forth by forward and inverse calculation of the data of D.S.S.,geomagnetic deep sounding,gravity,aeromagnetic survey and heat flow etc.It has been discovered that there exists a train of key geophysical anomalies of low wave velocity,high conductance,low density,high heat flow etc.,which are consistent quite well in Space with the Haicheng earthquake phypocentral area. They furnish very important practical evidences for analysing the physical process of a strong earthquake. |
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