摘要
本文采用小地震活动图象和４．０级（Ｍｓ）以上地震震源机制资料的构造分析方法，得到一幅华北地区震源构造在地面的投影分布图，它显示４条ＮＮＥ－ＮＥ向和１条ＮＷＷ—ＮＷ向地震构造带交切成的共轭剪切构造格架。每条地震构造带又由一系列共轭剪切构造组成。由发生在带内的４个大震序列共轭破裂特征发现，共轭地震构造的孕震与控震作用是地震构造带形成的机制。
By tectonic analysis of the images of small earthquake activity and focal mechanism data of earth quakes with magnitude of more than 4. 0 (Ms), a distribution map of focal tectonics in North China has been obtained, which shows a conjugate shear tectonic framwork intersected by four NNE-NE and one NWW-NW seismotectonic zones. Each seismotectonic zone consists of a series of conjugate shear tectonics. From the conjugate fracture characteristics of four large earthquake sequences occurred in the zone, it can be found that the seismogenic and earthquake-controlling function of conjugate seismic tectonic is the mechanism of the formation of seismotectonic zones.
出处
《华北地震科学》
北大核心
1995年第4期1-8,共8页
North China Earthquake Sciences
基金
地震科学联合基金
关键词
华北地区
震源机制
共轭剪破裂
地震构造带
North China
image of small earthquake activity
focal mechanism
conjugate shear tectonic
seismogenic function
earthquake-controlling function
