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Quantifying Microstructural Evolution in Moving Magma

Dobson, Katherine J.; Allabar, Anja; Bretagne, Eloise; Coumans, Jason; Cassidy, Mike; Cimarelli, Corrado; Coats, Rebecca; Connolley, Thomas; Courtois, Loic; Dingwell, Donald B.; Di Genova, Danilo; Fernando, Benjamin; Fife, Julie L.; Fyfe, Frey; Gehne, Stephan; Jones, Thomas; Kendrick, Jackie E.; Kinvig, Helen; Kolzenburg, Stephan; Lavallée, Yan; Liu, Emma; Llewellin, Edward W.; Madden-Nadeau, Amber; Madi, Kamel; Marone, Federica; Morgan, Cerith; Oppenheimer, Julie; Ploszajski, Anna; Reid, Gavin; Schauroth, Jenny; Schlepütz, Christian M.; Sellick, Catriona; Vasseur, Jérémie; von Aulock, Felix W.; Wadsworth, Fabian B.; Wiesmaier, Sebastian; Wanelik, Kaz

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Katherine J. Dobson

Anja Allabar

Jason Coumans

Mike Cassidy

Corrado Cimarelli

Rebecca Coats

Thomas Connolley

Loic Courtois

Donald B. Dingwell

Danilo Di Genova

Benjamin Fernando

Julie L. Fife

Frey Fyfe

Stephan Gehne

Thomas Jones

Jackie E. Kendrick

Helen Kinvig

Stephan Kolzenburg

Yan Lavallée

Emma Liu

Amber Madden-Nadeau

Kamel Madi

Federica Marone

Cerith Morgan

Julie Oppenheimer

Anna Ploszajski

Gavin Reid

Jenny Schauroth

Christian M. Schlepütz

Jérémie Vasseur

Felix W. von Aulock

Sebastian Wiesmaier

Kaz Wanelik


Many of the grand challenges in volcanic and magmatic research are focused on understanding the dynamics of highly heterogeneous systems and the critical conditions that enable magmas to move or eruptions to initiate. From the formation and development of magma reservoirs, through propagation and arrest of magma, to the conditions in the conduit, gas escape, eruption dynamics, and beyond into the environmental impacts of that eruption, we are trying to define how processes occur, their rates and timings, and their causes and consequences. However, we are usually unable to observe the processes directly. Here we give a short synopsis of the new capabilities and highlight the potential insights that in situ observation can provide. We present the XRheo and Pele furnace experimental apparatus and analytical toolkit for the in situ X-ray tomography-based quantification of magmatic microstructural evolution during rheological testing. We present the first 3D data showing the evolving textural heterogeneity within a shearing magma, highlighting the dynamic changes to microstructure that occur from the initiation of shear, and the variability of the microstructural response to that shear as deformation progresses. The particular shear experiments highlighted here focus on the effect of shear on bubble coalescence with a view to shedding light on both magma transport and fragmentation processes. The XRheo system is intended to help us understand the microstructural controls on the complex and non-Newtonian evolution of magma rheology, and is therefore used to elucidate the many mobilization, transport, and eruption phenomena controlled by the rheological evolution of a multi-phase magmatic flows. The detailed, in situ characterization of sample textures presented here therefore represents the opening of a new field for the accurate parameterization of dynamic microstructural control on rheological behavior.

Journal Article Type Article
Acceptance Date Jun 19, 2020
Online Publication Date Sep 21, 2020
Publication Date 2020
Deposit Date Oct 6, 2020
Publicly Available Date Oct 6, 2020
Journal Frontiers in Earth Science
Publisher Frontiers Media
Peer Reviewed Peer Reviewed
Volume 8
Public URL


Published Journal Article (15.5 Mb)

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Copyright Statement
Copyright © 2020 Dobson, Allabar, Bretagne, Coumans, Cassidy, Cimarelli, Coats, Connolley, Courtois, Dingwell, Di Genova, Fernando, Fife, Fyfe, Gehne, Jones, Kendrick, Kinvig, Kolzenburg, Lavallée, Liu, Llewellin, Madden-Nadeau, Madi, Marone, Morgan, Oppenheimer, Ploszajski, Reid, Schauroth, Schlepütz, Sellick, Vasseur, von Aulock, Wadsworth, Wiesmaier and Wanelik. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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