摘要
2008年5月12日在汶川映秀(北纬31.0°,东经103.4°)发生8级大地震,而后发生万余次余震,其最大震级为6.4级,此次地震属主震-余震型地震。通过构造分析认为,汶川大地震是构造地震,主要受龙门山断裂带的强烈活动控制。它是一种板内地震,其动力来源来自印度板块与欧亚板块的碰撞。而成都平原处于稳定地块中,尽管离震中较近,然受地震的影响有限,是比较安全的。
The Wenchuan great earthguake（M=8,31.0°N, 103.4°E,Yingxiu,Wenchuan）occurring on May 15,2008 is typical of a main-aftershock. It was considered, on the basis of tectonic analysis,that the Wenchuan great earthquake was a structural earthquake. This earth-quake was controlled by the intense activity of the Longmenshan fracture zone and its dynamic source is resulted from the collision of India plate and Eurasian plate. Though,Chengdu is very close to the epicenter of the Wenchuan earthquake,the effect of quake on this big city is limit because Chengdu plain is located in a relatively stable block.
出处
《矿物岩石》
CAS
CSCD
北大核心
2008年第2期1-5,共5页
Mineralogy and Petrology
关键词
汶川大地震
构造地震
龙门山断裂带
稳定地块
板块碰撞
Wenchuan great earthquake
structural earthquake
Longmenshan froctare zone
stable block
plate collision
