海原8.5级地震发震构造与应力场的讨论

DISCUSSION ON THE CAUSATIVE STRUCTURE OF M=8.5 EARTHQUAKE IN HAIYUAN AND ITS STRESS FIELD

摘要: 本文从地震地质角度,对1920年海源大震发震构造带,主要是对极震区发震构造在第四纪以来的活动性及活动特点以及产生这一活动的应力场与动力来源等进行了讨论。之后,在分析区内活动构造的基础上,得到两点有关海原大震发生的重要地质信息。

Abstract: In this paper, the activity Since Quarternarly and characteristics of the causative fault zone, (mainly the causative fault zone of meizo-seismal region) the stress field and force source of Haiyuan earthquake in 1920 have been discussed. Based on this, two pieces of the important information about the occurence of Haiyuan earthquake are obtained.