V14A:
What Can Pyroclasts Tell Us? II

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Session ID#: 18149

Session Description:
Pyroclasts are fragments of magma generated during volcanic eruptions and they capture information on otherwise unobservable processes that control those eruptions. Increasingly refined analyses are used to investigate physical and chemical properties of pyroclasts to determine 1) the state of magma and its dynamic evolution in the conduit, 2) the response of magma to deformation, 3) the dynamics of particle ejection, transport, and deposition. When combined with sophisticated experiments and models, those analyses improve our comprehension of volcanic phenomena and the processes driving magma migration and fragmentation, transport dynamics through the atmosphere or along the ground, and the impact of eruptions on the environment. In this session we will explore the forefront of analysis and interpretation of pyroclasts and their deposits. We welcome contributions from field and experimental volcanology, monitoring and computational modeling to build dialogue between diverse scientists about how best to decipher volcanic eruptions using pyroclasts.
Primary Convener:  Benjamin James Andrews, Smithsonian Institution, Washington DC, United States
Conveners:  Benjamin James Andrews, Smithsonian Institution, Washington DC, United States, Rebecca Carey, University of Tasmania, School of Natural Sciences, Hobart, TAS, Australia and Heather Michelle Nicholson Wright, USGS Cascades Volcano Observatory, Vancouver, WA, United States
Chairs:  Benjamin James Andrews, Smithsonian Institution, Washington DC, United States, Rebecca Carey, University of Tasmania, School of Natural Sciences, Hobart, TAS, Australia and Heather Michelle Nicholson Wright, USGS Cascades Volcano Observatory, Vancouver, WA, United States
OSPA Liaison:  Benjamin James Andrews, Smithsonian Institution, Washington DC, United States
Index Terms:

8404 Volcanoclastic deposits [VOLCANOLOGY]
8428 Explosive volcanism [VOLCANOLOGY]
8434 Magma migration and fragmentation [VOLCANOLOGY]
8445 Experimental volcanism [VOLCANOLOGY]

Abstracts Submitted to this Session:

Capillary and Gas Trapping Controls on Pumice Buoyancy in Water (148511)
Kristen E. Fauria, Vanderbilt University, Department of Earth and Environmental Sciences, Nashville, United States, Michael Manga, University of California Berkeley, Earth and Planetary Science, Berkeley, CA, United States and Zihan Wei, Peking University, School of Earth and Space Sciences, Beijing, China; University of California Berkeley, Berkeley, CA, United States
3D Micro-tomography on Aggregates from the 2014- 2015 Eruption of Hunga Tonga-Hunga Ha'apai Volcano (173011)
Mathieu Colombier1, Bettina Scheu2, Shane J Cronin3, Manuela Tost4, Katherine J Dobson5 and Donald B Dingwell1, (1)Ludwig Maximilians University of Munich, Department of Earth and Environmental Sciences, Munich, Germany, (2)Ludwig Maximilian University of Munich, Department of Geo- and Environmental science, Munich, Germany, (3)University of Auckland, School of Environment, Auckland, New Zealand, (4)University of Auckland, Auckland, New Zealand, (5)University of Strathclyde, Department of Earth Sciences, Glasgow, United Kingdom
The Mechanisms and Dynamics of High-Energy Lava–Water Explosions (Invited) (167959)
Erin P Fitch, University of Hawaii at Manoa, Dept. of Geology and Geophysics, Honolulu, HI, United States and Sarah Ann Fagents, University of Hawaii at Manoa, Hawaii Institute of Geophysics and Planetology, Honolulu, HI, United States
Eruption Energetics from Ash Morphology (175628)
Megan Clark, Lehigh University, Bethlehem, PA, United States and Dork L Sahagian, Lehigh University, Earth & Environmental Sciences, Bethlehem, PA, United States
Textures of Pyroclasts From Explosive Basaltic Eruptions at Soputan Volcano, Indonesia (162239)
Heather Michelle Nicholson Wright, USGS Baltimore, Baltimore, MD, United States, Syegi Lenarahmi Kunrat, Portland State University, Department of Geology, Portland, OR, United States and John S Pallister, U.S. Geological Survey Alaska Volcano Observatory, Anchorage, AK, United States
Eruptive Dynamics Inferred from Textural Analysis of Ash Time Series: The 2015 Reawakening of Cotopaxi Volcano (176236)
Helen E Gaunt1, Benjamin Bernard1, Silvana Hidalgo1, Antonio Proaño1, Heather Michelle Nicholson Wright2, Patricia A Mothes1 and Evelyn Criollo3, (1)Instituto Geofísico, Escuela Politécnica Nacional, Quito, Ecuador, (2)USGS Cascades Volcano Observatory, Vancouver, WA, United States, (3)National Polytechnical University Ecuador EPN, Departamento de Metalurgia Extractiva, Quito, Ecuador
Runout distance and dynamic pressure of pyroclastic density currents: Evidence from 18 May 1980 blast surge of Mount St. Helens (143402)
James E Gardner, University of Texas at Austin, Jackson School of Geosciences, Austin, TX, United States and Benjamin James Andrews, National Museum of Natural History, Smithsonian Institution, Mineral Sciences, Washington, United States
Erosional self-channelization of pyroclastic density currents - Evidence from ground-penetrating radar imaging at Mt. St. Helens, Washington (USA) (117515)
Andrew Gase, Universiy of Texas at Austin, Austin, TX, United States, Brittany D Brand, Boise State University, Geosciences, Boise, United States and John Bradford, Boise State University, Department of Geosciences, Boise, ID, United States

See more of: Volcanology, Geochemistry and Petrology