%0 Journal Article
%T PRELIMINARY STUDY ON MOTION CHARACTERISTICS OF LONGMENSHAN FAULT BEFORE AND AFTER Ms8.0 WENCHUAN EARTHQUAKE<br>汶川8.0级地震前后龙门山断裂活动特征浅析
%A Jiao Qing
%A Yang Xuanhui
%A Xu Liqing
%A Wang Bo
%A <br>焦 青
%A 杨选辉
%A 许丽卿
%A 王 博
%J 大地测量与地球动力学
%D 2008
%I 
%X In this paper by utilizing the mobile short-line leveling data across the Longmenshan fault the variation characteristics at each observation site before and after the Wenchuan earthquake are analyzed.By analyzing the motion type and stress pattern of the Longmenshan fault we investigated the seismogenic process and mechanism of the earthquake.The preliminary results are as follows.a)Before the Wenchuan earthquake the cross-fault short-line leveling in 2006 showed the activity at all of the stations of Longmenshan fault with a characteristic of accelerative movement to different degrees.b)Before the earthquake the short-line leveling indicated that the middle-south segment of Longmenshan fault showed reverse faulting movement,and the fault deformation was of inversive "S" type.c)Before and after the Wenchuan earthquake the cross-fault displacement measurements reflected the spatial-temporal evolution of the accumulation and release of regional surface stress,the interpretation of their mechanism is basically consistent with the focal mechanism solution.
%K Wenchuan earthquake
%K Longmenshan fault
%K cross-fault displacement
%K seismogenic mechanism
%K leveling<br>汶川地震
%K 龙门山断裂
%K 跨断层位移
%K 孕震机理
%K 水准测量
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=DA72A78627FE64EAA572951EA05D274A&jid=73A1A428591E600EF664B596512A2997&aid=D469CC33C600AF3FA29D6B96B707D6A3&yid=67289AFF6305E306&vid=D3E34374A0D77D7F&iid=E158A972A605785F&sid=DF92D298D3FF1E6E&eid=708DD6B15D2464E8&journal_id=1671-5942&journal_name=大地测量与地球动力学&referenced_num=22&reference_num=7