兰州-西安-郑州电导率异常带
CONDUCTIVITY ANOMALY IN THE LANZHOU-XIAN-ZHENGZHOU BELT
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摘要: 根据磁暴急始和湾扰变化,发现沿兰州——西安——郑州有一条垂直分量接近于零的过渡带,反映其下存在一条电导率异常带或高导带,本文称之为兰州——西安——郑州电导率异常带.考察沿线的地质和地球物理特征表明,异常带处于特定的构造、地震和地热环境中,推测沿异常带是一地壳软弱带或次板块边界,还推测地磁异常可能与电流通道效应有关.Abstract: It is found, on the basis of 3SC and geomagnetic bays variations, that there is a zone of nearly vanishing Z with a east-west trend along Lanzhou-Xian-Zhengzhou belt. It is called the Lanzhou-Xian-Zhengzhou conductivity anomalous zone. There is some relationship among the following factors from studying the geological and geophysical characteristics along the zone. It is deduced that this zone may be a weak zone in the crust or a boundary between two sub-plates. It is also deduced that this zone may probably be related to the channel effect of the induced current in a larger region.
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[1] 徐文耀、祁睽、王仕明,甘肃省东部地区短周期地磁变化异常及其与地震的关系,地球物理学报,21,218——224,1978.
[2] 杜兴信,陕西及其邻近地区地磁短周期异常和上地慢高导层初步研究,西北地震学报,4,115——119,1982,
[3] Rokityansky, LL, Geoelectromagnetic investigation of the earth's crust and mantle, translated by Chobotova, N.L. et al, Springer—— Verlag, Berlin——Heideiberg——New York, 1982.
[4] 张业成、胡景江、周瑞泉,中国地热资源概况及开发利用前景,中国地质,1985, 1:19——22,
[5] 王信和,大陆地区构造活动、地热及地壳上地慢结构之间关系的探讨,地质科学,1985, 1: 21——30
[6] 詹志佳,地壳和上地慢的电导率异常,世界地震译丛,1982,9:67——70,
[7] Gough, D. L, and M.R. Ingham,磁力仪台阵记录的解释方法,安振昌译,地震地质译丛,5,11——20, 1985
[8] 国家地震局,中国地震烈度区划工作报告,39——73,地震出版社,1981.[1] 徐文耀、祁睽、王仕明,甘肃省东部地区短周期地磁变化异常及其与地震的关系,地球物理学报,21,218——224,1978.
[2] 杜兴信,陕西及其邻近地区地磁短周期异常和上地慢高导层初步研究,西北地震学报,4,115——119,1982,
[3] Rokityansky, LL, Geoelectromagnetic investigation of the earth's crust and mantle, translated by Chobotova, N.L. et al, Springer—— Verlag, Berlin——Heideiberg——New York, 1982.
[4] 张业成、胡景江、周瑞泉,中国地热资源概况及开发利用前景,中国地质,1985, 1:19——22,
[5] 王信和,大陆地区构造活动、地热及地壳上地慢结构之间关系的探讨,地质科学,1985, 1: 21——30
[6] 詹志佳,地壳和上地慢的电导率异常,世界地震译丛,1982,9:67——70,
[7] Gough, D. L, and M.R. Ingham,磁力仪台阵记录的解释方法,安振昌译,地震地质译丛,5,11——20, 1985
[8] 国家地震局,中国地震烈度区划工作报告,39——73,地震出版社,1981.
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