V44A:
What Can Pyroclasts Tell Us? I


Submit an Abstract to this Session


Session ID#: 57337

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 laboratory analysis,  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, National Museum of Natural History, Smithsonian Institution, Mineral Sciences, Washington, United States
Conveners:  Corrado Cimarelli, Ludwig Maximilian University of Munich, Earth & Environmental Sciences, Munich, Germany, Ulrich Kueppers, Ludwig-Maximilians Universität München, Department of Earth and Environmental Sciences, Munich, Germany and Heather Michelle Nicholson Wright, USGS, Baltimore, MD, United States
Primary Liaison:  Benjamin James Andrews, National Museum of Natural History, Smithsonian Institution, Mineral Sciences, Washington, United States
Chairs:  Benjamin James Andrews1, Ulrich Kueppers2, Corrado Cimarelli2 and Heather Michelle Nicholson Wright3, (1)National Museum of Natural History, Smithsonian Institution, Mineral Sciences, Washington, United States(2)Ludwig-Maximilians Universität München, Department of Earth and Environmental Sciences, Munich, Germany(3)USGS, Baltimore, MD, United States
OSPA Liaison:  Corrado Cimarelli, Ludwig-Maximilians Universität München, Department of Earth and Environmental Sciences, Munich, Germany
Index Terms:

8404 Volcanoclastic deposits [VOLCANOLOGY]
8428 Explosive volcanism [VOLCANOLOGY]
8445 Experimental volcanism [VOLCANOLOGY]
8486 Field relationships [VOLCANOLOGY]

Abstracts Submitted to this Session:

Homogeneous Bubble Nucleation in Rhyolitic Melt: Experimental Confirmation of Predictions from Nucleation Theory (437025)
Sahand Hajimirza, Rice University, Department of Earth, Environmental and Planetary Sciences, Houston, TX, United States, James E Gardner, University of Texas at Austin, Jackson School of Geosciences, Austin, TX, United States and Helge Martin Gonnermann, Rice University, Earth, Environmental and Planetary Sciences, Houston, United States
Controls of Crystal Shape on Degassing Mechanisms in Crystal-Rich Magmas with Rhyolitic Groundmass Melts (422058)
Nathan A Graham, University of Alaska Fairbanks, Fairbanks, AK, United States, Jessica F Larsen, University of Alaska Fairbanks, Department of Geosciences, Fairbanks, AK, United States, Katharine V Cashman, University of Oregon, Eugene, United States and Rebecca deGraffenried, University of Hawaii Manoa, Honolulu, HI, United States
Compositionally dependent response of andesites to eruption at Augustine Volcano (Invited) (442811)
Mary Benage, USGS Cascades Volcano Observatory, Vancouver, WA, United States, Heather Michelle Nicholson Wright, USGS, Baltimore, MD, United States and Michelle L Coombs, U.S. Geological Survey, Alaska Volcano Observatory, Anchorage, United States
Fragmentation in crystal-rich basaltic systems: Ash generation at Volcán de Fuego, Guatemala (Invited) (352752)
Emma J Liu1,2, Ellen Miller2, Katharine V Cashman3, Alison Rust4, Matthew Watson5, Marie Edmonds6 and Gustavo Chigna7, (1)University of Bristol, Bristol, United Kingdom, (2)University of Cambridge, Earth Sciences, Cambridge, United Kingdom, (3)University of Oregon, Eugene, United States, (4)University of Bristol, Bristol, BS8, United Kingdom, (5)University of Bristol, Earth Sciences, Bristol, United Kingdom, (6)University of Cambridge, Department of Earth Sciences, Cambridge, United Kingdom, (7)INSIVUMEH, Guatemala City, Guatemala
Role of Nanolite Crystallization in Magma Fragmentation During Ash Eruptions (390395)
Michihiko Nakamura1, Mayumi Mujin1, Tomomori Toma1 and Akihiko Yokoo2, (1)Tohoku University, Graduate School of Science, Sendai, Japan, (2)Kyoto University, Kyoto, Japan
Fluidal Ash Grains in the Havre 2012 Submarine Eruption: Implications for Particle Generation in a Kilometre-Deep Submarine Rhyolite Eruption (430811)
James D L White, University of Otago, Geology Department, Dunedin, New Zealand, Arran Peter Murch, University of Otago, Dunedin, New Zealand, Tobias Dürig, University of Iceland, Geology Department, Reykjavik, Iceland, Daniela Mele, University of Bari Aldo Moro, Bari, Italy and Rebecca Carey, University of Tasmania, School of Natural Sciences, Hobart, TAS, Australia
Decoding PDC Flow Direction and Shear Conditions in the Flow Boundary Zone via Particle-Fabric Analysis (416312)
PJ Hale Zrelak Jr, University of Oregon, Eugene, United States, Nicholas Michael Pollock, Boise State University, Boise, ID, United States, Brittany D Brand, Boise State University, Department of Geosciences, Boise, United States and Damiano Sarocchi, Universidad Autónoma de San Luis Potosí, Instituto de Geología, San Luis Potosí, Mexico

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