豫北深、浅部构造特征与地震  

DEEP AND SHALLOW TECTONIC FEATURES AND EARTHQUAKES IN NORTH HENAN

作　　者：任文菊[1] 刘明清[1] 赵丽[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9-17,共9页North China Earthquake Sciences

基　　金：河南省科技攻关基金

摘　　要：通过对豫北地区浅层和深部地震地质构造特征及地震活动性的综合分析 ,以薄壁—新乡—商丘断裂带为界 ,划分为北部地区和南部地区 ,并分别进行了论述。认为北部地区构造线主体为北东向 ,与华北断块区的构造线一致 ,浅层构造沿区域构造线呈断隆和断陷相间展布 ,深部莫霍界面隆起凹陷也相间排列。南部地区的主体构造线基本为北西向 ,与北部地区截然不同 ,浅层构造豫东为在整体沉降的基础上有次级的隆起和凹陷 ,深部结构表现为大面积的莫霍面隆起 ,其上又有次级的凹陷存在。豫西块体则是整体隆起 ,断裂是主要的构造形式 ,并控制着一系列断陷盆地的形成和演化 ,深部莫霍面凹陷。根据本区历史和现代地震 ,结合浅层构造和深部结构 ,认为汤阴地堑与三门峡 -灵宝盆地存在发生中强地震的危险。By comprehensively analyzing the deep and shallow tectonic features of seismogeology and seismic activity in North Henan,the region is divided into the northern area and the southern area at the boundary,Bobi Xinxiang Shangqiu fault belt,and the two areas are separately discussed.In the northern area,the main tectonic line is NE direction,which is identical with the tectonic line in North China fault block region,the shallow tectonic presents fault uprise alternating with fault depression along the direction of regional tectonic line,and the Moho shows upwarping alternating with depression.In the southern area,the main tectonic line is basically NW direction,which is completely different from that in the northern area,the shallow tectonic in East Henan includes the secondary uprise and depression on the basis of whole subsidence,and deep structures show the large scale Moho upwarping where there are secondary depressions.West Henan block shows the whole uprise,the main type of tectonics are faults,which control the formation and evolution of a series of down faulted basins,and the Moho is depressed.Acording to historical and modern earthquakes and combined with the shallow tectonic and deep structure,it is thought that there are risks for occurrence of moderate and strong earthquakes in Tangyin graben and Sanmenxia Lingbao basin.

关 键 词：河南 深部结构 潜在震源区 地震 地质构造 浅层 

分 类 号：P315.2[天文地球—地震学]