Crustal Structure across the Western Afar Margin from the Uplifted Plateau to the Rift Axis using Receiver Functions
1 : Institut de physique du globe de Strasbourg
université de Strasbourg, Institut national des sciences de l\'Univers, Centre National de la Recherche Scientifique : UMR7516, Institut national des sciences de l\'Univers, Institut national des sciences de l\'Univers, Institut national des sciences de l\'Univers, Institut national des sciences de l\'Univers
2 : Institut de physique du globe de Strasbourg
(IPGS)
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université de Strasbourg, INSU
5 Rue René Descartes 67084 STRASBOURG CEDEX -
France
3 : Institut des Sciences de la Terre de Paris
Sorbonne Université, Centre National de la Recherche Scientifique : UMR7193
4 : SOES, Southampton, UK
5 : Université de Pise
6 : Department of Earth Sciences, Birkbeck, University of London
Imaging the crust in Afar and its surrounding regions provides an opportunity to understand how rifting has evolved from the continental extension to the incipient oceanic spreading segments. Using the Receiver Functions calculated at 28 stations installed along 2 profiles across the western margin of Afar, we focus on the spatial evolution of the Moho depth and the crustal properties involved over the rift evolution. We evidence distinct types of crustal thinning along these profiles, with beta larger in the North where the rifting segments are more evolved.
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