从大陆磁异常特征论板块内部地震成因  

DISCUSSION ON ORIGIN OF INTRAPLATE EARTHQUAKES FROM CONTINENTAL MAGNETIC ANOMALIES

作　　者：张先[1] 刘敏[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：《地球物理学进展》2000年第4期87-96,共10页Progress in Geophysics

基　　金：国家自然科学基金项目! (4 97742 30 )号 ) ;中国地震局地球物理勘探中心科技成果编号!GPB2 0 0 0 15

摘　　要：首先通过海洋磁异常与大陆磁异常的对比 ,说明了大陆磁异常的特征及大陆内部结构和构造的复杂性 .进而以华北地区为例 ,对航磁异常进行带通滤波和视磁化强度反演等数据处理 ,揭示了大陆地壳内部垂向分层、横向分块的结构特征 .结合地震地质、人工地震测深及深部流体等方面的研究 ,论述了板内地震的生成是由于陆内不同构造块体间相对运动、碰撞、摩擦、应力积累 ,能量释放的推论 .First, the characteristics of the continental magnetic anomalies and the complexity of the structures and the tectonics in the plates are clarified by comparing the oceanic magnetic anomalies with the continent magnetic anomalies. Then taking Northern China region for example, the structure characteristics of the stratified vertically and the blocking laterally continental crust are revealed by using the band pass filtering of aeromagnetic anomalies and the inversion of apparent magnetization. The inference that earthquakes are caused by relative motion,collision,friction between various tectonic blocks and the stress accumulation and the energy release in the continent is expounded combining with research results of seismogeology, the deep seismic sounding and the deep fluid bodies.

关 键 词：板内构造 活动块体 地震成因 大陆磁异常 海洋 

分 类 号：P315.1[天文地球—地震学] P318.43[天文地球—固体地球物理学]