Imaging the lithospheric structure and plumbing system below the Mayotte volcanic zone

Teleseismic 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 lithosphere in east-northeast quadrant is composed of four main layers, interpreted as edifice, crust with underplating, lithospheric mantle, asthenosphere, latter two presenting a low-velocity zone. The depths old (10–11 km) new Moho (28–31 coincide magma reservoirs evidenced by recent seismological petrological methods. propose reservoir mush an increasing amount liquid extends down to 54 km depth. This storage develops from rheological contrast between ductile lower brittle upper mantle accounts most eruption-related seismicity. Finally, abnormally small thickness (33 likely result thermal thinning since onset Cenozoic magmatism.