摘要
利用川西地区1990—1997年、1997—2003年及1994—2006年区域水准观测资料,借助负位错反演,研究汶川Ms8.0地震与攀枝花Ms6.1地震前相关及周边断裂的构造变形特征与应变积累背景。分析表明:安宁河断裂北段与鲜水河断裂南段及与龙门山断裂交汇区附近显示与继承性运动背景一致的大范围、显著隆升和长时间尺度(10数年)应变能积累特性,对汶川大震有一定程度反映;而元谋-绿汁江断裂南段1997—2003年应变积累加速特征可能对攀枝花地震有一定程度反映。
By use of the regional leveling observations of the western Sichuan in the periods of 1990-1997, 1997-2003 and 1994-2006 and the aid of inversion of negative dislocation ,the characteristics of tectonic deformation and strain accumulation background of correlative and neighbor faults before the Wenehuan Ms8.0 earthquake and the Panzhihua Ms6.1 earthquake are researched. It is concluded that there is obvious uplift in the large region according with its background of successive movement and long-term （ over 10 years） strain accumulation on the northern segment of Anninghe fault and the southern segment of Xianshuihe fault and the region they meet Longmenshan fault, reflecting the background of the Wenchuan Ms8.0 earthquake to some extent. Moreover, the acceleration of stain accumulation during 1997-2003 on the southern segment of Yuanmou-luzhijiang fault may reflect the background of the Panzhihua Ms6.1 earthquake.
出处
《大地测量与地球动力学》
CSCD
北大核心
2009年第3期16-22,共7页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(40674010)
地震科学联合基金(A07130)
关键词
汶川地震
攀枝花地震
垂直形变
负位错
背景
Wenchuan Ms8.0 earthquake
Panzhihua Ms6.1 earthquake
vertical deformation
negative dislocation
background
