摘要
四川汶川大地震给人们留下诸多困惑:大地震究竟是如何发生的,大地震能否避免?本文根据松潘—甘孜褶皱带的深部地壳构造特征表明:松潘—甘孜褶皱带的茂县(1933年)、松潘—平武(1976年)、汶川(2008年)大地震震源深度与中地壳低速、高导层深度大体一致,可能成因上相关。历史上一些大地震如银川地震、海原地震、渭南地震、海城地震、唐山地震等也均与中地壳低速、高导层有关,这一切均可能与地球排气作用有关。而通过地震、森林大火、油气资源的一体化勘查,可查明地震可能发生的区域。通过油气的勘查、开发、排放,可有效减少地震发生的可能性。
Some puzzles come from Wenchuan great earthquake： how did Wenchuan great earthquake took place and how can great earthquake avoid？ The deep crust structure of Songpan--Ganzi folded belt in Sichuan shows that the focus depth of Wenchuan great earthquake （ 2008 ） , Maoxian great earthquake （ 1933 ） , Songpan-Pingwu great earthquake（ 1996） were same with the low velocity and high conductive layer of the mid-crust, and they might be related to this layer. Moreover, Yinchuan earthquake, Haiyuan earthquake, Weinan earthquake, Tangshan earthquake, Haicheng earthquake were also related to the low velocity and high conductive layer. All of these earthquakes might be caused by the earth outgassing. Based on the integrative survey on the earthquake, forest fire and petroleum resources, some seismogenic structure region can be explored, and through effluent of oils and gases, the possibility of the earthquake might be decreased.
出处
《西北地震学报》
CSCD
北大核心
2008年第4期405-412,共8页
Northwestern Seismological Journal
关键词
地震
成因
震源
中地壳低速高导层
壳幔韧性剪切带
地球排气作用
汶川大地震
Earthquake
Origin
Earthquake focus
Low velocity and high conductive layer of mid-crust
Crust-mantle ductile shear zone
Earth outgassing
Wenehuan great earthquake
作者简介
张景廉（1941-），男（汉族），江苏常熟人，从事油气地球化学与成因研究
