1937年菏泽地震地裂缝追踪研究

TRACING RESEARCH ON GEOFRACTURES DUE TO THE HEZE EARTHQUAKE IN 1937

摘要:

本文在前人研究和野外调查工作的基础上,对1937年菏泽7.0级和6(3)/(4)级地震地裂缝的空间展布特征、性质、成因及其与震中区附近活动断裂的关系进行了深入研究,并以此为依据对两次地震的破裂方式及发震构造进行了讨论.认为菏泽地震的破裂方式为“双震型共轭破裂”,北西向成武一东明隐伏断裂可能为7.0级地震的主要发震构造。

Abstract:

This paper deeply studies the distribution,natures and cause of geofractures associated with the Heze Ms 7.0 and Ms 6(3)/(4) earthquakes in 1937,and their relation to the active faults near the epicentral area based on previous studies and field investigations. Then the fracture pattern and the causative structures of the two earthquakes are discussed.It is considered thatthe fracture pattern of the Heze earthquake is conjugate fracture of double-shock type and the Chengwu-Dongming buried fault which trends form NW to SE is mainly causative structure of the Ms 7.0 earthquake.