The volatile flushing triggers eruptions at open conduit volcanoes: Evidence from Mount Etna volcano (Italy)

Ferlito, Carmelo; Coltorti, Massimo; Lanzafame, Gabriele; Giacomoni, Pier Paolo

doi:10.1016/j.lithos.2013.10.030

Cited by 44 publications

(34 citation statements)

References 82 publications

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“…This observation raises questions about the geometry and dynamic properties of degassing magma reservoirs, which remains poorly known and might have a strong control on eruptive activity [12,13]. For instance, high gas fluxes could be explained by the degassing of either large volumes of deep stagnant magma (>1 km 3 stored at a few kilometres depth) or else small batches (10 5 -10 6 m 3 ) of quickly overturned magma brought at shallow levels (hundreds of meter).…”

Section: Introductionmentioning

confidence: 99%

A New Degassing Model to Infer Magma Dynamics from Radioactive Disequilibria in Volcanic Plumes

et al. 2018

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Pb within gas bubbles en route to the surface. Theoretical short-lived radioactive disequilibria in volcanic gases predicted by this new model differ from those produced by the former models and better match the values we measured in the plume during the 2015 campaign. A Monte Carlo-like simulation based on variable parameters characterising the degassing process (magma residence time in the degassing reservoir, gas transfer time, Rn-Pb-Bi-Po volatilities, magma volatile content) suggests that short-lived disequilibria in volcanic gases may be of use to infer both magma dynamics and degassing kinetics beneath Mount Etna, and in general at basaltic volcanoes. However, this simulation emphasizes the need for accurately determined input parameters in order to produce unambiguous results, allowing sharp characterisation of degassing processes.

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Section: Introductionmentioning

confidence: 99%

A New Degassing Model to Infer Magma Dynamics from Radioactive Disequilibria in Volcanic Plumes

et al. 2018

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“…Etna plumbing system, i.e., ~20 km depth (Ferlito and Lanzafame 2010). In this scenario, volcanic eruptions are fed by the upward migration of hot, fluid-saturated, poorly dense, and highly buoyant magmas from depth, with implications for mineral and melt compositions, degree of crystallization, magma ascent velocity and type of eruption (Armienti et al 2007;Ferlito et al 2014;Collins et al 2009;Lanzafame et al 2013;Fornaciai et al 2015;Mollo et al 2015aMollo et al , 2015b.…”

Section: Introductionmentioning

confidence: 99%

An improved clinopyroxene-based hygrometer for Etnean magmas and implications for eruption triggering mechanisms

Perinelli

Mollo

Gaeta

et al. 2016

American Mineralogist

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We have refined the clinopyroxene-based hygrometer published by Armienti et al. (2013) for a better quantitative understanding of the role of H 2 O in the differentiation of Etnean magmas. The original calibration data set has been significantly improved by including several experimental clinopyroxene compositions that closely reproduce those found in natural Etnean products. To verify the accuracy of the model, some randomly selected experimental clinopyroxene compositions external to the calibration data set have been used as test data. Through a statistic algorithm based on the Mallows' C P criterion, we also check that all model parameters do not cause data overfitting, or systematic error.The application of the refined hygrometer to the Mt. Etna 2011-2013 lava fountains indicates that most of the decreases in H 2 O content occur at P < 100 MPa, in agreement with melt inclusion data suggesting abundant H 2 O degassing at shallow crustal levels during magma ascent in the conduit and eruption to the surface.

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“…Etna characterized by uniform phase assemblages (olivine + clinopyroxene + plagioclase + titanomagnetite) and bulk rocks permanently buffered to the compositions of trachybasalts and basaltic trachyandesites (Armienti et al, 2007;Corsaro et al, 2009). To provide magmatic constraints on the early-stage of crystallization, the compositions of phenocryst cores and bulk rocks are frequently used as input data for barometers, thermometers, hygrometers and oxygen barometers (Armienti et al, 2007(Armienti et al, , 2013Lanzafame et al, 2013;Ferlito et al, 2014;Giacomoni et al, 2014;Mollo et al, 2015). However, these estimates reflect the conditions at which minerals saturate the melt at low degrees of crystallization (Putirka et al, 2003), and when the erupted products represent near-liquidus compositions (Frey and Lange, 2011).…”

Section: Introductionmentioning

confidence: 99%

Clinopyroxene and titanomagnetite cation redistributions at Mt. Etna volcano (Sicily, Italy): Footprints of the final solidification history of lava fountains and lava flows

et al. 2015

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The volatile flushing triggers eruptions at open conduit volcanoes: Evidence from Mount Etna volcano (Italy)

Cited by 44 publications

References 82 publications

A New Degassing Model to Infer Magma Dynamics from Radioactive Disequilibria in Volcanic Plumes

A New Degassing Model to Infer Magma Dynamics from Radioactive Disequilibria in Volcanic Plumes

An improved clinopyroxene-based hygrometer for Etnean magmas and implications for eruption triggering mechanisms

Clinopyroxene and titanomagnetite cation redistributions at Mt. Etna volcano (Sicily, Italy): Footprints of the final solidification history of lava fountains and lava flows

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