Enhancement of eruption explosivity by heterogeneous bubble nucleation triggered by magma mingling

Joali Paredes-Mariño; Katherine J. Dobson; Gianluigi Ortenzi; Ulrich Kueppers; Daniele Morgavi; Maurizio Petrelli; Kai-Uwe Hess; Kathrin Laeger; Massimiliano Porreca; Adriano Pimentel; Diego Perugini

doi:10.1038/s41598-017-17098-3

Enhancement of eruption explosivity by heterogeneous bubble nucleation triggered by magma mingling

Joali Paredes-Mariño, Katherine J. Dobson, Gianluigi Ortenzi, Ulrich Kueppers, Daniele Morgavi, Maurizio Petrelli, Kai-Uwe Hess, Kathrin Laeger, Massimiliano Porreca, Adriano Pimentel, Diego Perugini^*

^*Corresponding author for this work

Civil And Environmental Engineering

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

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Abstract

We present new evidence that shows magma mingling can be a key process during highly explosive eruptions. Using fractal analysis of the size distribution of trachybasaltic fragments found on the inner walls of bubbles in trachytic pumices, we show that the more mafic component underwent fracturing during quenching against the trachyte. We propose a new mechanism for how this magmatic interaction at depth triggered rapid heterogeneous bubble nucleation and growth and could have enhanced eruption explosivity. We argue that the data support a further, and hitherto unreported contribution of magma mingling to highly explosive eruptions. This has implications for hazard assessment for those volcanoes in which evidence of magma mingling exists.

Original language	English
Article number	16897
Number of pages	10
Journal	Scientific Reports
Volume	7
DOIs	https://doi.org/10.1038/s41598-017-17098-3
Publication status	Published - 4 Dec 2017

Funding

This study was supported by the European Union’s Seventh Framework Programme FP7 “FP7-PEOPLE-2013-ITN”, under Grant agreement number is 607905 – VERTIGO. DP acknowledges the European Research Council for the Consolidator Grant ERC-2013-CoG Proposal No. 612776 CHRONOS to DP. KJD was supported by ERC 247076 (EVOKES, Ludwig-Maximilians-Universität München) and NERC NE/M01687/1 (Durham University). UK acknowledges financial support during field work from Project M1.1.2/I/009/2005/A (Fundação Gaspar Frutuoso).

Keywords

Volcanic eruption
magma mingling
magmatic interaction
heterogeneous bubble nucleation
hazard assessment

Access to Document

10.1038/s41598-017-17098-3Licence: CC BY 4.0

Paredes-Marino-etal-SR-2017-Enhancement-of-eruption-explosivity-by-heterogeneous-bubble-nucleationFinal published version, 3.79 MBLicence: CC BY 4.0

Cite this

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title = "Enhancement of eruption explosivity by heterogeneous bubble nucleation triggered by magma mingling",

abstract = "We present new evidence that shows magma mingling can be a key process during highly explosive eruptions. Using fractal analysis of the size distribution of trachybasaltic fragments found on the inner walls of bubbles in trachytic pumices, we show that the more mafic component underwent fracturing during quenching against the trachyte. We propose a new mechanism for how this magmatic interaction at depth triggered rapid heterogeneous bubble nucleation and growth and could have enhanced eruption explosivity. We argue that the data support a further, and hitherto unreported contribution of magma mingling to highly explosive eruptions. This has implications for hazard assessment for those volcanoes in which evidence of magma mingling exists.",

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AU - Dobson, Katherine J.

AU - Ortenzi, Gianluigi

AU - Kueppers, Ulrich

AU - Morgavi, Daniele

AU - Petrelli, Maurizio

AU - Hess, Kai-Uwe

AU - Laeger, Kathrin

AU - Porreca, Massimiliano

AU - Pimentel, Adriano

AU - Perugini, Diego

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N2 - We present new evidence that shows magma mingling can be a key process during highly explosive eruptions. Using fractal analysis of the size distribution of trachybasaltic fragments found on the inner walls of bubbles in trachytic pumices, we show that the more mafic component underwent fracturing during quenching against the trachyte. We propose a new mechanism for how this magmatic interaction at depth triggered rapid heterogeneous bubble nucleation and growth and could have enhanced eruption explosivity. We argue that the data support a further, and hitherto unreported contribution of magma mingling to highly explosive eruptions. This has implications for hazard assessment for those volcanoes in which evidence of magma mingling exists.

AB - We present new evidence that shows magma mingling can be a key process during highly explosive eruptions. Using fractal analysis of the size distribution of trachybasaltic fragments found on the inner walls of bubbles in trachytic pumices, we show that the more mafic component underwent fracturing during quenching against the trachyte. We propose a new mechanism for how this magmatic interaction at depth triggered rapid heterogeneous bubble nucleation and growth and could have enhanced eruption explosivity. We argue that the data support a further, and hitherto unreported contribution of magma mingling to highly explosive eruptions. This has implications for hazard assessment for those volcanoes in which evidence of magma mingling exists.

KW - Volcanic eruption

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KW - hazard assessment

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Enhancement of eruption explosivity by heterogeneous bubble nucleation triggered by magma mingling

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Kate Dobson

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Enhancement of eruption explosivity by heterogeneous bubble nucleation triggered by magma mingling

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Kate Dobson

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