Estimating the viscosity of volcanic melts from the vibrational properties of their parental glasses

Abstract The numerical modelling of magma transport and volcanic eruptions requires accurate knowledge of the viscosity of magmatic liquids as a function of temperature and melt composition. However, there is growing evidence that volcanic melts can be prone to nanoscale modification and crystalliza...

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Autores principales:	Michele Cassetta, Danilo Di Genova, Marco Zanatta, Tiziana Boffa Ballaran, Alexander Kurnosov, Marco Giarola, Gino Mariotto
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4182c62ac40c4cdb8c404429f3489567
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spelling	oai:doaj.org-article:4182c62ac40c4cdb8c404429f34895672021-12-02T16:07:03ZEstimating the viscosity of volcanic melts from the vibrational properties of their parental glasses10.1038/s41598-021-92407-52045-2322https://doaj.org/article/4182c62ac40c4cdb8c404429f34895672021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92407-5https://doaj.org/toc/2045-2322Abstract The numerical modelling of magma transport and volcanic eruptions requires accurate knowledge of the viscosity of magmatic liquids as a function of temperature and melt composition. However, there is growing evidence that volcanic melts can be prone to nanoscale modification and crystallization before and during viscosity measurements. This challenges the possibility of being able to quantify the crystal-free melt phase contribution to the measured viscosity. In an effort to establish an alternative route to derive the viscosity of volcanic melts based on the vibrational properties of their parental glasses, we have subjected volcanologically relevant anhydrous glasses to Brillouin and Raman spectroscopic analyses at ambient conditions. Here, we find that the ratio between bulk and shear moduli and the boson peak position embed the melt fragility. We show that these quantities allow an accurate estimation of volcanic melts at eruptive conditions, without the need for viscosity measurements. An extensive review of the literature data confirms that our result also holds for hydrous systems; this study thus provides fertile ground on which to develop new studies of the nanoscale dynamics of natural melts and its impact on the style of volcanic eruptions.Michele CassettaDanilo Di GenovaMarco ZanattaTiziana Boffa BallaranAlexander KurnosovMarco GiarolaGino MariottoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Michele Cassetta Danilo Di Genova Marco Zanatta Tiziana Boffa Ballaran Alexander Kurnosov Marco Giarola Gino Mariotto Estimating the viscosity of volcanic melts from the vibrational properties of their parental glasses
description	Abstract The numerical modelling of magma transport and volcanic eruptions requires accurate knowledge of the viscosity of magmatic liquids as a function of temperature and melt composition. However, there is growing evidence that volcanic melts can be prone to nanoscale modification and crystallization before and during viscosity measurements. This challenges the possibility of being able to quantify the crystal-free melt phase contribution to the measured viscosity. In an effort to establish an alternative route to derive the viscosity of volcanic melts based on the vibrational properties of their parental glasses, we have subjected volcanologically relevant anhydrous glasses to Brillouin and Raman spectroscopic analyses at ambient conditions. Here, we find that the ratio between bulk and shear moduli and the boson peak position embed the melt fragility. We show that these quantities allow an accurate estimation of volcanic melts at eruptive conditions, without the need for viscosity measurements. An extensive review of the literature data confirms that our result also holds for hydrous systems; this study thus provides fertile ground on which to develop new studies of the nanoscale dynamics of natural melts and its impact on the style of volcanic eruptions.
format	article
author	Michele Cassetta Danilo Di Genova Marco Zanatta Tiziana Boffa Ballaran Alexander Kurnosov Marco Giarola Gino Mariotto
author_facet	Michele Cassetta Danilo Di Genova Marco Zanatta Tiziana Boffa Ballaran Alexander Kurnosov Marco Giarola Gino Mariotto
author_sort	Michele Cassetta
title	Estimating the viscosity of volcanic melts from the vibrational properties of their parental glasses
title_short	Estimating the viscosity of volcanic melts from the vibrational properties of their parental glasses
title_full	Estimating the viscosity of volcanic melts from the vibrational properties of their parental glasses
title_fullStr	Estimating the viscosity of volcanic melts from the vibrational properties of their parental glasses
title_full_unstemmed	Estimating the viscosity of volcanic melts from the vibrational properties of their parental glasses
title_sort	estimating the viscosity of volcanic melts from the vibrational properties of their parental glasses
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/4182c62ac40c4cdb8c404429f3489567
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Estimating the viscosity of volcanic melts from the vibrational properties of their parental glasses

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