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Quantifying microstructural evolution in moving magma

DOI: 10.3389/feart.2020.00287 DOI Help

Authors: Katherine J. Dobson (University of Strathclyde; Durham University) , Anja Allabar (Eberhard Karls University of Tuebingen) , Eloise Bretagne (Durham University) , Jason Coumans (Durham University) , Mike Cassidy (University of Oxford) , Corrado Cimarelli (Ludwig-Maximilians-Universitä) , Rebecca Coats (University of Liverpool) , Thomas Connolley (Diamond Light Source) , Loic Courtois (3Dmagination) , Donald B. Dingwell (Ludwig-Maximilians-Universität) , Danilo Di Genova (Universität Bayreuth; University of Bristol) , Benjamin Fernando (University of Oxford) , Julie L. Fife (Swiss Light Source) , Frey Fyfe (University of Oxford) , Stephan Gehne (University of Portsmouth) , Thomas Jones (Durham University; University of Liverpool) , Jackie E. Kendrick (University of Liverpool) , Helen Kinvig (Durham University) , Stephan Kolzenburg (Ludwig-Maximilians-Universität; University at Buffalo) , Yan Lavallee (University of Liverpool) , Emma Liu (University College London) , Edward W. Llewellin (Durham University) , Amber Madden-nadeau (University of Oxford) , Kamel Madi (3Dmagination) , Federica Marone (Swiss Light Source) , Cerith Morgan (Lancaster University) , Julie Oppenheimer (University of Bristol) , Anna Ploszajski (University College London (UCL)) , Gavin Reid (Independent Researcher) , Jenny Schauroth (Ludwig-Maximilians-Universität; University of Liverpool) , Christian M. Schlepütz (Swiss Light Source) , Catriona Sellick (Durham University) , Jérémie Vasseur (Ludwig-Maximilians-Universität) , Felix W. Von Aulock (University of Liverpool) , Fabian B. Wadsworth (Durham University; Ludwig-Maximilians-Universität) , Sebastian Wiesmaier (Ludwig-Maximilians-Universität) , Kaz Wanelik (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Frontiers In Earth Science , VOL 8

State: Published (Approved)
Published: September 2020
Diamond Proposal Number(s): 15898

Open Access Open Access

Abstract: 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 Keywords: volcanology; rheology; synchrotron; in situ; magma; X-ray tomography

Subject Areas: Earth Science


Instruments: I12-JEEP: Joint Engineering, Environmental and Processing

Other Facilities: TOMCAT beamline X02DA at SLS

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