汶川地震孕震背景与同震变化的铲形断层位错模拟

The Simulation on Listric-fault Dislocation Background and Co-seismic Deformation of the Wenchuan Earthquake

利用1983—1997、1997(或2007)—2008年跨龙门山断裂带长水准剖面观测资料,借助纯逆断、铲形断层正负位错模型与网格搜索试错法,模拟2008年5月12日四川省汶川县8.0级特大地震前闭锁背景与同震变化,在一定程度上反映出龙门山中央断裂震前应变能积累、震时反弹的特性。

Using long-leveling section observation data crossing Longmenshan fault during the period of 1983-1997 and 1997（or 2007）-2008,aided by positive and negative dislocation model of pure thrust and spade-fault,in combination with the method for grid-searching and testing,the authors simulated the locked energy background before the Wenchuan Ms8.0 great earthquake of Sichuan Province on 12 May,2008 and its co-seismic deformation.The energy accumulation before this earthquake and co-seismic rebounding of Central Longmenshan fault are revealed to some extent.