A structural outline of the Yenkahe volcanic resurgent dome (Tanna Island, Vanuatu Arc, South Pacific)
Merle Olivier, Brothelande Élodie, Lénat Jean-François, Bachèlery Patrick, Garaébiti Esline. 2013. .
ARTICLE, (2013 ) - PUBLISHEDVERSION - English (en-GB)
OPENACCESS -
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Audience : OTHER
HAL CCSD, Elsevier
Sujet
Volcanoes, Resurgent dome, Volcano-tectonics, Magma, [SDU.STU.VO]Sciences of the Universe [physics]/Earth Sciences/Volcanology, [SDE.MCG]Environmental Sciences/Global Changes
Domaines
Volcanologie, Sciences de la Terre, Sciences de l'environnement
Description
International audience A structural study has been conducted on the resurgent Yenkahe dome (5 km long by 3 km wide) located in the heart of the Siwi caldera of Tanna Island (Vanuatu arc, south Pacific). This spectacular resurgent dome hosts a small caldera and a very active strombolian cinder cone - the Yasur volcano - in the west and exhibits an intriguing graben in its central part. Detailed mapping and structural observations make it possible to unravel the volcano-tectonic history of the dome. It is shown that, following the early formation of a resurgent dome in the west, a complex collapse (caldera plus graben) occurred and this was associated with the recent uplift of the eastern part of the present dome. Eastward migration of the underlying magma related to regional tectonics is proposed to explain this evolution.
Auteurs
Merle, Olivier, Brothelande, Élodie, Lénat, Jean-François, Bachèlery, Patrick, Garaébiti, Esline
Contributeurs
Laboratoire Magmas et Volcans (LMV) ; Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) ; Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS), Vanuatu Meteorological and Gehazards Department ; Vanuatu Meteorological and Gehazards Department
Sources
ISSN: 0377-0273, Journal of Volcanology and Geothermal Research, https://hal.science/hal-00981453, Journal of Volcanology and Geothermal Research, 2013, 268, pp.64-72. ⟨10.1016/j.jvolgeores.2013.10.009⟩
Relation
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jvolgeores.2013.10.009
