| 电阻率测深在地电异常判定中的应用 |
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| 引用本文： | 田山,郑文俊,刘允秀,关华平.电阻率测深在地电异常判定中的应用[J].地震,2003,23(3):131-136. |
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| 作者姓名： | 田山 郑文俊 刘允秀 关华平 |
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| 作者单位： | 1. 天津市地震局,天津,300201
2. 中国地震局分析预报中心,北京,100036 |
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| 摘 要： | 塘沽台NS方向地电阻率观测值在观测极距缩短后出现大幅度上升变化，为了判断此变化的性质及其产生的可能原因，开展了多次恢复原极距的对比观测。并依据该台已有的电测深资料，对此变化进行了最佳拟合的理论反演计算。经比测及反、正演计算结果分析，认为该台NS方向大幅度的上升变化其主要原因与台站观测极距缩短有关，可能是随观测极距的缩短，受浅部电性结构层影响增大，而与深部电性结构无关，因而这一变化不具有震兆意义。
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| 关 键 词： | 地电 异常判定 电阻率测深 地震观测 反演计算 正演计算 观测极距 电性结构 |
| 文章编号： | 1000-3274(2003)03-0131-06 |
| 修稿时间： | 2003年1月7日 |
Application of geoelectric resistivity sounding in abnormity determinant |
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| Abstract: | Resistivity in the North-south direction at Tanggu station increased obviously after the measuring space was shortened. In order to further understand the vari ation causes, the resistivity was contrasted to the original spacing for several times and was analyzed by using forward calculation and inverse explanation. Th e result shows that the resistivity variation was related to the shortening of s pacing. The affection of near-surface layer to geoelectric resistivity measurem ent was increased and the affection of deeper layer was decreased with the short ening of spacing. However, the resistivity variation due to the shortening of sp acing is not associated with earthquake precursor. |
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| Keywords: | Resistivity sounding Abnormity determinant Forward calculating and inversion explaining |
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