节点文献
川滇地区近期地壳运动的应变积累
ON STRAIN ACCUMULATION OF RECENT CRUST MOVEMENT IN SICHUAN-YUNNAN AREA
【摘要】 利用1994~2006年川滇地区GPS和区域水准观测资料,借助弹性块体边界负位错模型,结合近年来跨断层形变总体特征,研究了川滇地区构造块体及其边界断裂的应变积累状况与强度。分析结果表明:目前川滇地区总体呈现能量积累为主的构造应力态势;安宁河断裂及其与则木河断裂、鲜水河断裂交汇区,盐源-丽江地块及其边缘附近反映出相对高的应变能积累背景及可能的中-短期地震前兆特征。
【Abstract】 By use of the regional leveling and GPS observations in Sichuan-Yunnan area during 1994-2006,aided by the negative dislocation model for the elastic block boundaries,combining with the total characteristics of deformation cross-fault,the recent status and intensity of strain accumulation of tectonic blocks and their boundary faults in Sichuan-Yunnan area are studied.The results show that recent status of tectonic stress in Sichuan-Yunnan area manifes itself in energy accumulation mainly.The strain energy accumulation appears obviously in the Anninghe fault and the regions where it meets Zemuhe fault and Xianshuihe fault,the Yanyuan-Lijiang block and its margins,it may be the medium and short-term precursors of some coming earthquakes.
【Key words】 negative dislocation model; data of GPS and regional leveling; cross-fault deformation; strain accumulation; Sichuan-Yunnan area;
- 【文献出处】 大地测量与地球动力学 ,Journal of Geodesy and Geodynamics , 编辑部邮箱 ,2007年04期
- 【分类号】P315
- 【被引频次】21
- 【下载频次】236