【摘要】 运用多学科、多技术相结合的研究方法,从现今构造应力场特征、现代地壳形变特征、主干断裂构造以及区域断裂活动性分析、新构造运动、地震活动、数值模拟等方面入手,对北淮阳及其邻接区地壳稳定性进行了全面而系统的研究,指出本区地震活动受走滑活动断裂控制,中、强地震集中于区内东南部和西北部NW向与NE向断裂交汇处;第四纪无大规模差异升降运动;数值模拟等综合分析表明,信阳地区的区域构造稳定性高,现代地壳形变量小,应力平缓,地震活动少且弱。更多还原

【Abstract】 By means of different subjects and te chniques,the paper makes an overall study on the crustal stability of Beihuaiyang region and its adjace nt areas from the aspects of current t ectonic stress fields,principal fa ult structures,analysis of regional fa ults and neotectonic activity,seis mic activity and numerical modeling,etc.It points out that under the action of th e E-W principal stress,the Funiu mou ntains and the Tongbo mountains are upwarped in the north-west of the are a and the Dabie mountains subside in t he south-east of the area.The seismi c activity in the area is controlled by fault structures,middle and strong earthquakes are focused on the north-west and south-east areas intersected by NW-and NE-trending faults.The engineering site in the middle of the area is located in a fault block without active regional fault pass and large-scale Quaternary tectonic movement,which seismic activity is rare and weak,an d it is a stable"island".更多还原