豫北地区居里面与地震关系的研究
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摘要
利用频率域三维磁性界面反演方法和程序反演计算了豫北地区居里面埋深图 ,结合地质构造特征及人工地震测深资料对豫北地区地震成因机制进行了探讨 :认为该区地壳上隆增厚区和地壳下沉减薄区之间产生的巨大剪切力和地下热物质上涌产生的热应力的双重作用乃是地震发生的直接动力 ,汤阴地堑和东濮断陷之内形成的居里面梯级带即高温块体和低温块体相交汇聚的地带是地震发生的构造基础。并对豫北地区潜在震源区的重点监测提出了一些观点。
The depth of Curie surface in North Henan is calculated by using the frequency domain inversion method and program of 3-D magnetic interface.Combined with the feature of geological structure and the data of deep seismic sounding,Causes and machenism of earthquakes in North Henan are discussed,the huge shear force and thermal stress produced by the upwelling of thermal matter between the uplift and subsidence area of the crust are two direct forces for earthquake occurrence;the gradient zone of Curie surface in Tangyin graben and Dongpu downfaulted block,i.e.the conjunction zone of high temperature blocks and low temperature blocks,is the tectonic base of earthquake occurrence.And some views are put forward about key monitoring of potential focal regions in North Henan.
The depth of Curie surface in North Henan is calculated by using the frequency domain inversion method and program of 3-D magnetic interface.Combined with the feature of geological structure and the data of deep seismic sounding,Causes and machenism of earthquakes in North Henan are discussed,the huge shear force and thermal stress produced by the upwelling of thermal matter between the uplift and subsidence area of the crust are two direct forces for earthquake occurrence;the gradient zone of Curie surface in Tangyin graben and Dongpu downfaulted block,i.e.the conjunction zone of high temperature blocks and low temperature blocks,is the tectonic base of earthquake occurrence.And some views are put forward about key monitoring of potential focal regions in North Henan.
引文
1 管志宁 ,等 .区域磁异常定量解释 .北京 :地质出版社 ,1 991 .
2 张成科 ,等 .豫北及其外围地区地壳上地幔结构研究 .地震地质 ,1 994 ,1 6( 3 ) .
3 姚法章 .从构造特征看冀鲁豫交界地区的强震危险性 .华北地震科学 .1 987,5
4 张存德 ,等 .华北地区的现代构造运动 .地震地质 ,1 990 ,1 2 ( 3 ) .
5 娄源清 ,等 .河南中北部地区地热场特征及潜在地热应力区初步探讨 .华北地震科学 .2 0 0 0 ,1 8( 3 ) .
6 郭增建 .震源物理 .北京 :地震出版社 ,1 979.
7 孙武城 ,等 .上海奉贤至内蒙古阿拉善左旗地学断面 .北京 :地质出版社 ,1 992 .
2 张成科 ,等 .豫北及其外围地区地壳上地幔结构研究 .地震地质 ,1 994 ,1 6( 3 ) .
3 姚法章 .从构造特征看冀鲁豫交界地区的强震危险性 .华北地震科学 .1 987,5
4 张存德 ,等 .华北地区的现代构造运动 .地震地质 ,1 990 ,1 2 ( 3 ) .
5 娄源清 ,等 .河南中北部地区地热场特征及潜在地热应力区初步探讨 .华北地震科学 .2 0 0 0 ,1 8( 3 ) .
6 郭增建 .震源物理 .北京 :地震出版社 ,1 979.
7 孙武城 ,等 .上海奉贤至内蒙古阿拉善左旗地学断面 .北京 :地质出版社 ,1 992 .
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