Exploring the links between volcano flank collapse and the magmatic evolution of an ocean island volcano: Fogo, Cape Verde

Abstract Mass-wasting of ocean island volcanoes is a well-documented phenomenon. Massive flank collapses may imply tens to hundreds of km3 and generate mega-tsunamis. However, the causal links between this large-scale, low-frequency instability, and the time–space evolution of magma storage, crystal...

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Autores principales:	Mélodie-Neige Cornu, Raphaël Paris, Régis Doucelance, Patrick Bachélery, Chantal Bosq, Delphine Auclair, Mhammed Benbakkar, Abdel-Mouhcine Gannoun, Hervé Guillou
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/9a0a11f6d73949f0a443bfe1d96579ef
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spelling	oai:doaj.org-article:9a0a11f6d73949f0a443bfe1d96579ef2021-12-02T16:38:49ZExploring the links between volcano flank collapse and the magmatic evolution of an ocean island volcano: Fogo, Cape Verde10.1038/s41598-021-96897-12045-2322https://doaj.org/article/9a0a11f6d73949f0a443bfe1d96579ef2021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96897-1https://doaj.org/toc/2045-2322Abstract Mass-wasting of ocean island volcanoes is a well-documented phenomenon. Massive flank collapses may imply tens to hundreds of km3 and generate mega-tsunamis. However, the causal links between this large-scale, low-frequency instability, and the time–space evolution of magma storage, crystal fractionation/accumulation, lithospheric assimilation, and partial melting remains unclear. This paper aims at tracking time variations and links between lithospheric, crustal and surface processes before and after a major flank collapse (Monte Amarelo collapse ca. 70 ka) of Fogo volcano, Cape Verde Islands, by analysing the chemical composition (major, trace elements, and Sr–Nd–Pb isotopes) and age-controlled stratigraphy (K–Ar and Ar–Ar dating) of lavas along vertical sections (Bordeira caldera walls). The high-resolution sampling allows detecting original variations of composition at different time-scales: (1) a 60 kyrs-long period of increase of magma differentiation before the collapse; (2) a 10 kyrs-long episode of reorganization of magma storage and evacuation of residual magmas (enriched in incompatible elements) after the collapse; and (3) a delayed impact at the lithospheric scale ~ 50 kyrs after the collapse (increasing EM1-like materiel assimilation).Mélodie-Neige CornuRaphaël ParisRégis DoucelancePatrick BachéleryChantal BosqDelphine AuclairMhammed BenbakkarAbdel-Mouhcine GannounHervé GuillouNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Mélodie-Neige Cornu Raphaël Paris Régis Doucelance Patrick Bachélery Chantal Bosq Delphine Auclair Mhammed Benbakkar Abdel-Mouhcine Gannoun Hervé Guillou Exploring the links between volcano flank collapse and the magmatic evolution of an ocean island volcano: Fogo, Cape Verde
description	Abstract Mass-wasting of ocean island volcanoes is a well-documented phenomenon. Massive flank collapses may imply tens to hundreds of km3 and generate mega-tsunamis. However, the causal links between this large-scale, low-frequency instability, and the time–space evolution of magma storage, crystal fractionation/accumulation, lithospheric assimilation, and partial melting remains unclear. This paper aims at tracking time variations and links between lithospheric, crustal and surface processes before and after a major flank collapse (Monte Amarelo collapse ca. 70 ka) of Fogo volcano, Cape Verde Islands, by analysing the chemical composition (major, trace elements, and Sr–Nd–Pb isotopes) and age-controlled stratigraphy (K–Ar and Ar–Ar dating) of lavas along vertical sections (Bordeira caldera walls). The high-resolution sampling allows detecting original variations of composition at different time-scales: (1) a 60 kyrs-long period of increase of magma differentiation before the collapse; (2) a 10 kyrs-long episode of reorganization of magma storage and evacuation of residual magmas (enriched in incompatible elements) after the collapse; and (3) a delayed impact at the lithospheric scale ~ 50 kyrs after the collapse (increasing EM1-like materiel assimilation).
format	article
author	Mélodie-Neige Cornu Raphaël Paris Régis Doucelance Patrick Bachélery Chantal Bosq Delphine Auclair Mhammed Benbakkar Abdel-Mouhcine Gannoun Hervé Guillou
author_facet	Mélodie-Neige Cornu Raphaël Paris Régis Doucelance Patrick Bachélery Chantal Bosq Delphine Auclair Mhammed Benbakkar Abdel-Mouhcine Gannoun Hervé Guillou
author_sort	Mélodie-Neige Cornu
title	Exploring the links between volcano flank collapse and the magmatic evolution of an ocean island volcano: Fogo, Cape Verde
title_short	Exploring the links between volcano flank collapse and the magmatic evolution of an ocean island volcano: Fogo, Cape Verde
title_full	Exploring the links between volcano flank collapse and the magmatic evolution of an ocean island volcano: Fogo, Cape Verde
title_fullStr	Exploring the links between volcano flank collapse and the magmatic evolution of an ocean island volcano: Fogo, Cape Verde
title_full_unstemmed	Exploring the links between volcano flank collapse and the magmatic evolution of an ocean island volcano: Fogo, Cape Verde
title_sort	exploring the links between volcano flank collapse and the magmatic evolution of an ocean island volcano: fogo, cape verde
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/9a0a11f6d73949f0a443bfe1d96579ef
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Exploring the links between volcano flank collapse and the magmatic evolution of an ocean island volcano: Fogo, Cape Verde

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