Role of syn-eruptive plagioclase disequilibrium crystallization in basaltic magma ascent dynamics

Giuseppe La Spina; Mike Burton; M de'Michieli Vitturi; Fabio Arzilli

doi:10.1038/ncomms13402

Role of syn-eruptive plagioclase disequilibrium crystallization in basaltic magma ascent dynamics

Giuseppe La Spina, Mike Burton, M de'Michieli Vitturi, Fabio Arzilli

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Abstract

Timescales of magma ascent in conduit models are typically assumed to be much longer than crystallization and gas exsolution for basaltic eruptions. However, it is now recognized that basaltic magmas may rise fast enough for disequilibrium processes to play a key role on the ascent dynamics. The quantification of the characteristic times for crystallization and exsolution processes are fundamental to our understanding of such disequilibria and ascent
dynamics. Here we use observations from Mount Etna’s 2001 eruption and a magma ascent model to constrain timescales for crystallization and exsolution processes. Our results show that plagioclase reaches equilibrium in 1–2 h, whereas ascent times were 1 h. Using these new constraints on disequilibrium plagioclase crystallization we also reproduce observed crystal abundances for different basaltic eruptions. The strong relation between magma ascent rate and disequilibrium crystallization and exsolution plays a key role in controlling
eruption dynamics in basaltic volcanism.

Original language	English
Article number	13402
Pages (from-to)	1-10
Number of pages	10
Journal	Nature Communications
Volume	7
Issue number	13402
DOIs	https://doi.org/10.1038/ncomms13402
Publication status	Published - 12 Dec 2016

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Petrology and volcanology
Burton, M. (PI), Hartley, M. (PI), Mccormick Kilbride, B. (PI), Mitchell, N. (PI), Neave, D. (PI), Pawley, A. (PI), Polacci, M. (PI), Biagioli, E. (Researcher), Bonechi, B. (Researcher), Buso, R. (Researcher), Davies, B. (Researcher), Esse, B. (Researcher), Bronziet, J. (PGR student), Delbrel, J. (PGR student), Höhn, M. (PGR student), Kember, A. (PGR student), Pardo Cofrades, A. (PGR student), Sen, R. (PGR student), Stewart, A. (PGR student) & Subbaraman, R. (PGR student)
Project: Research
Quantifying disequilbrium processes in basaltic volcanism
Burton, M. (PI), Hartley, M. (CoI) & Lee, P. (CoI)
1/09/16 → 31/08/21
Project: Research

Cite this

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title = "Role of syn-eruptive plagioclase disequilibrium crystallization in basaltic magma ascent dynamics",

abstract = "Timescales of magma ascent in conduit models are typically assumed to be much longer than crystallization and gas exsolution for basaltic eruptions. However, it is now recognized that basaltic magmas may rise fast enough for disequilibrium processes to play a key role on the ascent dynamics. The quantification of the characteristic times for crystallization and exsolution processes are fundamental to our understanding of such disequilibria and ascentdynamics. Here we use observations from Mount Etna{\textquoteright}s 2001 eruption and a magma ascent model to constrain timescales for crystallization and exsolution processes. Our results show that plagioclase reaches equilibrium in 1–2 h, whereas ascent times were 1 h. Using these new constraints on disequilibrium plagioclase crystallization we also reproduce observed crystal abundances for different basaltic eruptions. The strong relation between magma ascent rate and disequilibrium crystallization and exsolution plays a key role in controllingeruption dynamics in basaltic volcanism.",

author = "{La Spina}, Giuseppe and Mike Burton and {de'Michieli Vitturi}, M and Fabio Arzilli",

year = "2016",

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doi = "10.1038/ncomms13402",

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T1 - Role of syn-eruptive plagioclase disequilibrium crystallization in basaltic magma ascent dynamics

AU - La Spina, Giuseppe

AU - Burton, Mike

AU - de'Michieli Vitturi, M

AU - Arzilli, Fabio

PY - 2016/12/12

Y1 - 2016/12/12

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AB - Timescales of magma ascent in conduit models are typically assumed to be much longer than crystallization and gas exsolution for basaltic eruptions. However, it is now recognized that basaltic magmas may rise fast enough for disequilibrium processes to play a key role on the ascent dynamics. The quantification of the characteristic times for crystallization and exsolution processes are fundamental to our understanding of such disequilibria and ascentdynamics. Here we use observations from Mount Etna’s 2001 eruption and a magma ascent model to constrain timescales for crystallization and exsolution processes. Our results show that plagioclase reaches equilibrium in 1–2 h, whereas ascent times were 1 h. Using these new constraints on disequilibrium plagioclase crystallization we also reproduce observed crystal abundances for different basaltic eruptions. The strong relation between magma ascent rate and disequilibrium crystallization and exsolution plays a key role in controllingeruption dynamics in basaltic volcanism.

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JO - Nature Communications

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Role of syn-eruptive plagioclase disequilibrium crystallization in basaltic magma ascent dynamics

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Petrology and volcanology

Quantifying disequilbrium processes in basaltic volcanism

Cite this