V13G:
What Can Pyroclasts Tell Us? I

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Session ID#: 18154

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:

Interpreting Pyroclast Textures: Re-Evaluating Crystal Size Distributions in the Context of New Views of Magmatic Systems (175140)
Jenny Riker, University of Bristol, Bristol, BS8, United Kingdom and Katharine V Cashman, University of Bristol, Bristol, United Kingdom
Causes and implications of suppressed vesiculation and crystallization in phenocryst embayments (172935)
Katharine V Cashman, University of Bristol, Bristol, United Kingdom and Alison Rust, University of Bristol, School of Earth Sciences, Bristol, BS8, United Kingdom
Obsidian Pyroclasts: Where Do They Come From and What Can They Tell Us? (Invited) (124571)
James M Watkins, University of Oregon, Department of Earth Sciences, Eugene, United States, James E Gardner, University of Texas at Austin, Jackson School of Geosciences, Austin, TX, United States and Kenneth S Befus, Baylor University, Waco, TX, United States
Bubble nucleation in magmas: a dominantly heterogeneous process? (163122)
Thomas Shea, University of Hawaii at Manoa, Earth Sciences, Honolulu, United States, Julia E Hammer, University of Hawaii at Manoa, Honolulu, HI, United States and Stefanie A Brachfeld, Montclair State University, Earth and Environmental Studies, Montclair, NJ, United States
Predicting homogeneous bubble nucleation rates (195374)
Sahand Hajimirza, Rice University, Department of Earth, Environmental and Planetary Sciences, Houston, TX, United States, Helge Martin Gonnermann, Rice University, Earth, Environmental and Planetary Sciences, Houston, United States, James E Gardner, University of Texas at Austin, Jackson School of Geosciences, Austin, TX, United States and Thomas Giachetti, University of Oregon, Earth Sciences, Eugene, United States
Mechanism of Formation of Volcanic Bombs and Achneliths: Insights From Anisotropy of Magnetic Susceptibility Measurements. (129105)
Edgardo Canon-Tapia, CICESE, Ensenada, Mexico
The unsteady end to a powerful Plinian eruption: insights from a Vulcanian block apron from the 1912 eruption of Novarupta, Alaska (130012)
Samantha J Isgett, University of Hawaii at Manoa, Honolulu, HI, United States, Bruce F Houghton, University of Hawaiʻi at Mānoa, Department of Earth and Planetary Sciences, Honolulu, United States, Alain Burgisser, Institut de Sciences de la Terre, Université Savoie Mont Blanc, Le Bourget du Lac, France and Laurent Arbaret, Université d'Orléans, OSUC / ISTO, Orléans Cedex 2, France

See more of: Volcanology, Geochemistry and Petrology