Dofal, AMichon, L.Fontaine, Fabrice R.Rindraharisaona, ElisaBarruol, GuilhemTkalcic, Hrvoje2024-09-012024-09-011631-0713https://hdl.handle.net/1885/733716078Teleseismic receiver-functions and Rayleigh-wave dispersion curves are jointly inverted for quantifying S-wave velocity profiles beneath the active volcanic zone off Mayotte. We show that the lithosphere in the east-northeast quadrant is composed of four main layers, interpreted as the volcanic edifice, the crust with underplating, the lithospheric mantle, and the asthenosphere, the latter two presenting a main low-velocity zone. The depths of the old (10–11 km) and new Moho (28–31 km) coincide with the two magma reservoirs evidenced by recent seismological and petrological methods. We propose that the main magma reservoir composed of mush with an increasing amount of liquid extends down to 54 km depth. This magma storage develops from a rheological contrast between the ductile lower and brittle upper lithospheric mantle and accounts for most of the volcanic eruptionrelated seismicity. Finally, the abnormally small thickness of the lithospheric mantle (33 km) is likely a result of a thermal thinning since the onset of Cenozoic magmatism.AD’s research was supported by a PhD grant from the University of La Réunion. Station MAYO installation was supported by the Programme Iles Eparses funded by the CNRS-INSU (Institut National des Sciences de l’Univers), CNRS-INEE (Institut National Ecologie et Environnement), TAAF (Terres Australes et Antarctiques Françaises). MAYO portable seismometer was provided by the Alfred Wegener Institute (AWI) in Bremerhaven. The RHUM-RUM data (http://dx.doi.org/10.15778/RESIF.YV2011) are hosted and served by the French RESIF data center (http://seismology.resif.fr).application/pdfen-AUThe authors retain unrestricted copyrights and publishing rightshttp://creativecommons.org/licenses/by/4.0/MayotteComoros archipelagoMagmatic plumbing systemLithosphereReceiver functionJoint inversionRheological controls202210.5802/crgeos.1902024-04-28Creative Commons Attribution 4.0 International License