摘要
利用差分GPS对汶川8级地震的地表破裂带进行了详细测量,获得了汶川地震地表破裂的空间展布特征:地震在北川-映秀断裂上形成了长约200km的地表破裂带,同时也触发了灌县-江油断裂的活动,形成了长约75km的破裂带。地表破裂空间展布特征表明,汶川地震起始破裂以向北东方向逆冲为主,右旋走滑量不明显,之后向北东方向破裂。
On the basis of detail geological investigations of the surface rupture zone caused by Wenchuan Ms8.0 earthquake by use of differential GPS measurement, the characteristics of spatial distribution of surface rupture zone are known that a 200 km-long surface rupture was formed along the Beichuan-Yingxiu fault in the Wenchuan Ms8.0 earthquake. It also triggered the activity of the Guanxian-Jiangyou fault as indicated by an 75 km-long surface rupture. The distribution of earthquake surface rupture shows that the initial rupture is mainly north-eaststrike thrust with a little dextral slip and the subsequent rupture is a slip with the almost equal vertical and horizontal displacement.
出处
《大地测量与地球动力学》
CSCD
北大核心
2008年第6期47-52,共6页
Journal of Geodesy and Geodynamics
基金
中国地震局地壳应力研究所中央级公益性科研院所基本科研业务专项(ZDJ2007-12
ZDJ2008-37)
关键词
汶川8级地震
地表破裂带
龙门山构造带
构造意义
青藏高原
Wenchuan Ms8.0 earthquake
surface rupture zone
Longmenshan fault zone, tectonic implication
Tibetan plateau
