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DEBAYLE Eric

  • Grade/Statut : Directeur de Recherche - CNRS
  • Établissement : lgltpe UCB Lyon1
  • Bâtiment : GEODE
  • Étage : R4
  • Téléphone : +33 (04) 72 44 58 03
  • E-mail : Eric.Debayle[at]ens-lyon.fr
  • URL : http://perso.ens-lyon.fr/eric.debayle/

    Thème(s) de recherche

  • I study the deep Earth interior with the aim of understanding its structure and dynamics. With my colleagues, students and post-doc, I have produced a number of regional and global tomographic models of the shear wave velocity, anisotropy and attenuation of the mantle.
  • Our latest achievement is a global shear wave velocity model of the entire mantle, SEISGLOB2, which suggests a global change of the shear wave structure near 1000 km depth (Durand et al., 2017). Shear wave anisotropy can also be used to map mantle flow and we have recently shown that only plates moving faster than 4 cm/yr can produce sufficient shearing at their base to align anisotropic crystals at the scale of the entire tectonic plates (Debayle et al., 2005; Debayle and Ricard, 2013). Our recent global attenuation models suggest that several thermal plumes of the Pacific oceans are deeply rooted down to the transition zone and pond in the asthenosphere at the base of tectonic plates (Adenis et al., 2017). Comparison of velocity and attenuation models argue for compositional heterogeneities at the base of cratons and in a number of active regions (Adenis et al.,2017). I'm also interested in mapping seismic discontinuities and we have recently shown the existence of a global low velocity layer located just above the 410 km discontinuity (Tauzin et al., 2010). More detail can be found at http://perso.ens-lyon.fr/eric.debayle/ with a number of datasets, seismic models and tomographic codes which are made available to the community.