豫北地区居里面与地震关系的研究  

STUDY OF THE RELATIONSHIP BETWEEN CURIE SURFACE AND EARTHQUAKES IN NORTH HENAN

作　　者：虎喜凤[1] 刘明清[1] 赵丽[1] 宋金跃[1] 

机构地区：[1]中国地震局地球物理勘探中心,郑州450002

出　　处：《华北地震科学》2000年第3期26-31,共6页North China Earthquake Sciences

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.

关 键 词：地震成因 河南 地震监测 航空磁测 居里等温面 

分 类 号：P315.2[天文地球—地震学]