%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Berthod, C.
%A Komorowski, J.C.
%A Gurioli, L.
%A Médard, E.
%A Bachèlery, P.
%A Besson, P.
%A Verdurme, P.
%A Chevrel, Magdalena Oryaelle
%A Di Muro, A.
%A Peltier, A.
%A Devidal, J.L.
%A Nowak, S.
%A Thinon, I.
%A Burckel, P.
%A Hidalgo, S.
%A Deplus, C.
%A Loubrieu, B.
%A Pierre, D.
%A Bermell, S.
%A Pitel-Roudat, M.
%A Réaud, Y.
%A Fouchard, S.
%A Bickert, M.
%A Le Friant, A.
%A Paquet, F.
%A Feuillet, N.
%A Jorry, S.L.
%A Fouquet, Y.
%A Rinnert, E.
%A Cathalot, C.
%A Lebas, E.
%T Temporal magmatic evolution of the Fani Maoré submarine eruption 50 km east of Mayotte revealed by in situ sampling and petrological monitoring
%D 2023
%L fdi:010088394
%G ENG
%J Comptes Rendus Géoscience
%@ 1631-0713
%K MAYOTTE
%K FANI MAORE
%M ISI:000929986500011
%N S2
%P 195-223
%R 10.5802/crgeos.155
%U https://www.documentation.ird.fr/hor/fdi:010088394
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/2023-07/010088394.pdf
%V 354
%W Horizon (IRD)
%X The 'Fani Maoré' eruption off the coasts of Mayotte has been intensively monitored by applying methods similar to those used for subaerial eruptions. Repeated high-resolution bathymetric surveys and dredging, coupled with petrological analyses of time-constrained samples, allowed tracking the evolution of magma over the whole submarine eruptive sequence.  Indeed, after one year of direct ascent (Phase 1), basanitic magma switched to a different pathway that sampled a tephri-phonolitic subcrustal reservoir (Phase 2). Later, the magma pathway shifted again in the crust resulting in a new eruption site located 6 km northwest of the main edifice (Phase 3). The petrological signature of lava flows reveals both an evolution by fractional crystallization and syn-eruptive mixing with a tephri-phonolitic magma. We demonstrate that high-flux eruption of large volumes of basanitic magma from a deep-seated reservoir can interact with shallower reservoirs and remobilize eruptible magma. This has significant hazards implications with respect to the capacity of such large eruptions to reactivate shallow-seated inactive reservoirs from a transcrustal magmatic system that could be located potentially at a distance from the high-flux eruptive site.
%$ 064