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

G. La Spina (), M. Burton, M. de’ Michieli Vitturi and F. Arzilli
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G. La Spina: School of Earth and Environmental Sciences, The University of Manchester
M. Burton: School of Earth and Environmental Sciences, The University of Manchester
M. de’ Michieli Vitturi: Istituto Nazionale di Geofisica e Vulcanologia
F. Arzilli: School of Earth and Environmental Sciences, The University of Manchester

Nature Communications, 2016, vol. 7, issue 1, 1-10

Abstract: 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

Date: 2016
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DOI: 10.1038/ncomms13402

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