FN Archimer Export Format
PT J
TI Mantle xenolith-bearing phonolites and basanites feed the active volcanic ridge of Mayotte (Comoros archipelago, SW Indian Ocean)
BT 
AF Berthod, Carole
   Médard, Etienne
   Di Muro, Andrea
   Hassen Ali, Théo
   Gurioli, Lucia
   Chauvel, Catherine
   Komorowski, Jean-Christophe
   Bachèlery, Patrick
   Peltier, Aline
   Benbakkar, Mhammed
   Devidal, Jean-Luc
   Besson, Pascale
   Le Friant, Anne
   Deplus, Christine
   Nowak, Sophie
   Thinon, Isabelle
   Burckel, Pierre
   Hidalgo, Samia
   Feuillet, Nathalie
   Jorry, Stephan
   Fouquet, Yves
AS 1:1;2:1;3:2,3;4:1;5:1;6:3;7:3;8:1;9:2,3;10:1;11:1;12:3;13:3;14:3;15:3;16:4;17:3;18:3;19:3;20:5;21:5;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;14:;15:;16:;17:;18:;19:;20:PDG-REM-GM-LGS;21:PDG-REM-GM-LCG;
C1 Laboratoire Magmas et Volcans, Université Clermont Auvergne, CNRS, IRD, OPGC, Clermont-Ferrand, France
   Observatoire Volcanologique du Piton de la Fournaise, Institut de physique du globe de Paris, 97418, La Plaine des Cafres, France
   Institut de physique du globe de Paris, CNRS, Université de Paris, 75005, Paris, France
   BRGM, French Geological Survey, 3 avenue Claude Guillemin, BP36009, 45 060, Cédex 2, Orléans, France
   Ifremer, Unité Géosciences Marines, 29280, Plouzané, France
C2 UNIV CLERMONT AUVERGNE, FRANCE
   IPGP, FRANCE
   IPGP, FRANCE
   BRGM, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-REM-GM-LGS
   PDG-REM-GM-LCG
IN WOS Ifremer UPR
   copubli-france
   copubli-p187
   copubli-univ-france
IF 4.107
TC 22
UR https://archimer.ifremer.fr/doc/00722/83434/88677.pdf
LA English
DT Article
CR MAYOBS
   MAYOBS1
   MAYOBS2
   MAYOBS4
BO Marion Dufresne
DE ;Mayotte;Basanite;Phonolite;Magmatic system;Fractional crystallization
AB Since 2018, the submarine east flank of Mayotte Island (Comoros archipelago) is the site of a major eruption located at 3.5 km depth bsl on a WNW-ESE volcanic ridge. Samples brought by oceanographic cruises carried out to monitor this seismo-volcanic crisis indicate that this volcanic ridge is built by a bimodal sodic alkaline magmatic series that includes basanites and phonolites. A petrological study of dredged samples allowed us to image the magmatic system feeding the volcanic ridge and to determine the link between basanitic and phonolitic magmas. The magmatic system feeding the volcanic ridge comprises multiple levels of magma storage. Basanitic magmas generated at 80–100 km mantle depth are stored in two or more deep reservoirs (≥ 37 km) and then in shallower basanitic and phonolitic lenses located close to the Moho interface before rising the surface. This study identifies three possible scenarios: (1) the deep basanitic magma rises directly and quickly to the surface from the deep mantle reservoir (as is currently happening 60 km offshore), (2) the basanitic magma stalls in a shallower reservoir near the Moho before resuming its ascent toward the surface and erupting as porphyritic basanite, (3) the basanitic magma stops and evolves to phonolite in these sub-crustal reservoirs. The phonolitic lavas are produced by approximately 80% fractional crystallization (34% clinopyroxene, 30% anorthoclase feldspar, 15.5% magnetite, 12.5% olivine, 5% apatite and 4% ilmenite) of a hydrous basanitic magma at mantle depths (P > 0.6 GPa) under reduced oxygen fugacity (~ FMQ-1). In this third scenario, the phonolitic magma might be reactivated by the arrival of a new batch of deeper basanitic magma. 
PY 2021
PD OCT
SO Contributions To Mineralogy And Petrology
SN 0010-7999
PU Springer Science and Business Media LLC
VL 176
IS 10
UT 000695153700001
DI 10.1007/s00410-021-01833-1
ID 83434
ER

EF