摘要
本文根据澜沧—耿马地震形变带、极震区及余震序列分布特征,分析了7.6和7.2级地震的发震构造,认为北北西向旱母坝断层是7.2级地震的发震构造,7.6级地震的发震构造不是一条单一的断层,北西向木嘎断裂和北北西向澜沧—勐海断裂均有明显破裂表现,这一特点与震区复杂的地质构造背景有密切联系。
The seismogenic tectonics of Lancang (M7.6) and Gengma (M7.2) events are analysed according to the characteristic distribution of the seismic deformation belt, meizoseismal area and aftershock sequence in this paper. It is suggested that the NWN tending Hanmuba fault is the seismogenic fault of the M7.2 event, and the seismogenic tectonics of the M7.6 event is not a single fault. Both the NW tending Muga fault and NWN tending Lancang-Menghai fault show obviously faulting, which is closely related to the complicated tectonic background of this seismic area.
出处
《地震研究》
CSCD
北大核心
1991年第1期9-15,共7页
Journal of Seismological Research
关键词
地震
发震
构造
澜沧-耿马
Seismic deformation belt
Epicentral distribution of seismic sequence
Tectonics of seismic area
Seismogenic tectonics-Lancang-Gengma earthquake
