%0 Journal Article %T Viscosity of silicate melts from the active submarine volcanic chain of Mayotte %+ Laboratoire Magmas et Volcans (LMV) %+ Institut de Physique du Globe de Paris (IPGP (UMR_7154)) %+ Observatoire Volcanologique du Piton de la Fournaise (OVPF) %+ Observatoire Volcanologique et Sismologique de la Guadeloupe %A Verdurme, Pauline %A Le Losq, Charles %A Chevrel, Magdalena Oryaëlle %A Pannefieu, Salomé %A Médard, Etienne %A Berthod, Carole %A Komorowski, Jean-Christophe %A Bachèlery, Patrick %A Neuville, Daniel, R %A Gurioli, Lucia %< avec comité de lecture %Z CIR 4 %@ 0009-2541 %J Chemical Geology %I Elsevier %V 620 %P 121326 %8 2023-03-20 %D 2023 %R 10.1016/j.chemgeo.2023.121326 %K Rheology %K Alkali magmas %K Submarine volcano %K Volcanic eruption %K Raman spectroscopy %Z Sciences of the Universe [physics]/Earth Sciences/VolcanologyJournal articles %X Following an unprecedented seismic activity that started in May 2018, a new volcanic edifice, now called Mont Fani Maoré, was constructed on the ocean floor 50 km east of the island of Mayotte (Indian Ocean). This volcano is the latest addition to a volcanic chain characterized by an alkaline basanite-to-phonolite magmatic differentiation trend. Here, we performed viscosity measurements on five silicate melts representative of the East-Mayotte Volcanic Chain compositional trend: two basanites from Mont Fani Maoré, one tephri-phonolite and two phonolites from different parts of the volcanic chain. A concentric cylinder viscometer was employed at super-liquidus conditions between 1500 K and 1855 K and a creep apparatus was used for measuring the viscosity of the undercooled melts close to the glass transition temperature. At super-liquidus temperatures, basanites have the lowest viscosity (0.11-0.99 log10 Pa⸱s), phonolites the highest (0.91-3.89 log10 Pa⸱s), while the viscosity of the tephri %G English %2 https://hal.uca.fr/hal-03965373/document %2 https://hal.uca.fr/hal-03965373/file/Post_print_Verdurme_2023_MayotteVisco.pdf %L hal-03965373 %U https://hal.uca.fr/hal-03965373 %~ IRD %~ INSU %~ AFRIQ %~ PRES_CLERMONT %~ CNRS %~ IPGP %~ LMV %~ ACL-SF %~ OPGC %~ CAP20-25 %~ UNIV-PARIS %~ UNIVERSITE-PARIS %~ ANR %~ TEST3-HALCNRS