0-023 2D ELASTIC MODELLING WITH EFFICIENT MIXED FINITE ELEMENTS G. COHEN 1 and S. FAUQUEUX 2 1 Abstract We propose to model full elastic wave propagation in 2D anisotropic elastic media by a Mixed Finite Elements Method with mass-lumping. This method offers a gain of storage and time computation compared to more classical ones and thus should enable us to handle realistic 2D and 3D seismic surveys. Introduction We propose to develop a modelling tool which aims to take count of the specificities of the new seismic prospects : large 2D and 3D realistic models with complex and irregular topographies


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