JCJC - Jeunes chercheuses & jeunes chercheurs

Terre haute résolution anisotrope – TARANIS

Submission summary

When upper mantle rocks deform, they acquire a lattice-preferred orientation which makes them anisotropic for seismic wave propagation. Thus, studying seismic anisotropy allows us to constrain localization of deformation and the modes of deformation of the continental lithosphere, which remain poorly understood. Is deformation localized at the base of the lithosphere and reflect present motions of the asthenosphere or is it frozen in the lithopshere and inherited from past tectonic events? Is, deformation localized at major lithospheric shear zones or is it distributed homogeneously? Answering these important questions implies being able to image seismic anisotropic with a resolution of a few tens kilometers, which remains a challenge. In addition, anisotropic imaging is complicated by the the large number of parameters necessary to describe upper mantle anisotropy. These simple considerations suggest a novel approach is necessary to study upper mantle anisotropy. In this proposal, we propose to develop all the tools for high resolution imaging of upper mantle anisotropy, and use them on different regional and global datasets. ...

Project coordination

Sébastien CHEVROT (Université)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

Help of the ANR 125,710 euros
Beginning and duration of the scientific project: - 36 Months

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