V31A:
Conduit and Surface Dynamics of Silicic Magmas and Lavas II Posters

Submit an Abstract to this Session



Session ID#: 22346

Session Description:
The dynamics of silicic magmas during conduit ascent and effusion are controlled by diverse intensive, extensive, and mechanical parameters. During conduit ascent, those parameters control explosivity, or lack thereof. They also must vary greatly between effusive eruptions; from small, steep domes to extensive, large-volume flows. Recent eruptions in Chile and advances in experimental techniques have produced quantitative constraints on the interplay between rheology, permeability, degassing in silicic magmas. We seek submissions that explore the behavior of pre-fragmentation silicic magmas by investigating the timescales, physical conditions, and mechanical-temporal aspects ongoing during conduit ascent and effusive emplacement.
Primary Convener:  Graham D Andrews, West Virginia University, Department of Geology and Geography, Morgantown, WV, United States
Conveners:  Kenneth S Befus, Baylor University, Waco, TX, United States and Alan G Whittington, University of Texas at San Antonio, Heat And Mass Transfer & Experimental Rheology (HAMsTER) lab, Earth and Planetary Sciences, San Antonio, United States
Chairs:  Kenneth S Befus, Baylor University, Waco, TX, United States, Graham D Andrews, California State University Bakersfield, Geosciences, Bakersfield, United States and Alan G Whittington, University of Missouri, Geological Sciences, Columbia, United States
OSPA Liaison:  Graham D Andrews, California State University Bakersfield, Geosciences, Bakersfield, United States

Cross-Listed:
  • NH - Natural Hazards
  • P - Planetary Sciences
Index Terms:

8414 Eruption mechanisms and flow emplacement [VOLCANOLOGY]
8425 Effusive volcanism [VOLCANOLOGY]
8429 Lava rheology and morphology [VOLCANOLOGY]
8434 Magma migration and fragmentation [VOLCANOLOGY]

Abstracts Submitted to this Session:

Bayesian estimation of analytical conduit-flow model parameters from magma discharge rate observed during explosive eruptions (219950)
Takehiro Koyaguchi, University of Tokyo, Bunkyo-ku, Japan, Kyle R Anderson, USGS California Volcano Observatory, Moffett Field, United States and Tomofumi Kozono, Tohoku University, Sendai-shi, Japan
The permeability evolution of tuffisites and outgassing from dense rhyolitic magma (218629)
Michael John Heap, EOST École et Observatoire des Sciences de la Terre, Strasbourg Cedex, France, Hugh Tuffen, Lancaster University, Lancaster Environment Centre, Lancaster, United Kingdom, Fabian B Wadsworth, Durham University, Earth Sciences, Durham, United Kingdom, Thierry Reuschlé, EOST, CNRS, Strasbourg, France, Jonathan M Castro, Johannes Gutenberg University of Mainz, Mainz, Germany and C Ian Schipper, Victoria University of Wellington, Wellington, New Zealand
Examining shear processes during magma ascent (294259)
Jackie E Kendrick1, Paul Anthony Wallace1, Rebecca Coats2, Anthony Lamur3 and Yan Lavallée1, (1)University of Liverpool, Department of Earth, Ocean and Ecological Sciences, Liverpool, United Kingdom, (2)University of Liverpool, Liverpool, L69, United Kingdom, (3)University of Liverpool, School of Environmental Sciences, Liverpool, United Kingdom
Universal Viscous-Brittle Transition in Magmatic Liquids (238881)
Taylor Witcher, Ludwig Maximilians University of Munich, Munich, Germany, Fabian B Wadsworth, Durham University, Earth Sciences, Durham, United Kingdom, Kai-Uwe Hess, Ludwig-Maximilians-Universität, Department of Earth and Environmental Sciences, Munich, Germany, Caron Vossen, Utrecht University, Utrecht, Netherlands, Holly Unwin, University of Oxford, Oxford, United Kingdom and Donald B Dingwell, LMU, Munich, Germany

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