京西北地区重力场变化与大同—阳高地震  

CRAVITY VARIATION IN NORTHEAST AREA OF BEIJING AND DATONGYANGGAO EARTHQUAKE

作　　者：李清林[1] 栗文山[1] 黄邦武[1] 王夫运[1] 宋金跃 

机构地区：[1]国家地震局地球物理勘探大队

出　　处：《华北地震科学》1991年第1期22-27,共6页North China Earthquake Sciences

摘　　要：本文根据北京西北地区可信的重力复测和人工地震测深资料,论述了该区重力场趋势性异常变化、地壳深部构造特征和地震活动的关系。该区为一地壳局部隆起区,在地壳上部和下部均存在着低速夹层,这些重力场趋势性异常变化正是该区地壳应力场的变化与地壳深部物质变异的结果。This paper, basing on the reliable reiteration and art ificial seismic sounding data, discusses the tendency anomalous variation in gravityin this area and the relation between the character istics of deep crustal structure and seismic activity. This area is a local crustal uplift area, low velocity interlayer exists both in upper oust and lower one. These tendency anomalous variations in gravity field are right the results of variations in crust stress field and deep crustal matter in this area.

关 键 词：地震 重力场 变化 大同-阳高 

分 类 号：P315.2[天文地球—地震学]