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From: Joa Paredes <joali.paredes@studenti.unipg.it >
Subject: Invitation to submit abstract to IAVCEI session IV.6 Magma Fragmentation and the production of Volcanic Ash
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We would like to kindly invite to those working with volcanic ash to consider joining us at our session during the IAVCEI 2017 Scientific Assembly in Portland, Oregon, August 14 – 18:
“IV.6 Magma fragmentation and the production of volcanic ash”
Fragmentation is a critical process in volcanic eruptions. Its occurrence determines whether or not a volcano will eject vast amounts of pyroclastic material into Earth´s atmosphere. During its ascent in the conduit, magma evolves due to changes in stress, temperature and composition, leading to important strain heterogeneities during flow and considerable variability in fragmentation processes. Understanding the causes and processes behind the disruption of a continuous volume of molten rock into a mixture of gas and particles is still one of the main challenges of modern volcanology, and yet it’s hindered by our inability to make direct observations of the fragmentation process. Qualitative and quantitative analysis of tephra particles can shed light on the physical and chemical processes acting both during its formation and as ash travels through the atmosphere. We seek contributions focused on tephra studies, that combine natural evidence with experimental, statistical and numerical approaches to understand: (i) generation mechanisms, (ii) fragmentation timescales and efficiency, (iii) post-fragmentation processes inside the volcanic conduit (e.g., sintering and rheomorphism) and (iv) variability in the results obtained from natural deposits, experimental studies and models.
This session aims fostering multydisciplinary interactions and collaborations amongst field geologists, geochemists, petrologists, volcanologists, geophysicists, and numerical modelers.
Invited speakers: James Gardner (The University of Texas at Austin – USA) and Alvaro Amigo (SERNAGEOMIN – Chile)
Deadline for abstract submission is March 17, 2017
http://iavcei2017.org/ses_IV6.
http://iavcei2017.org/abstract
Looking forward to meet you in Portland,
Joali Paredes* (joali.paredes@studenti.unipg.
Jon Castro (castroj@xxxxxxxxxxxx)
Pablo Forte* (p.forte@xxxxxxxxxxxxxxxx)
Ulli Kueppers (u.kueppers@xxxxxx)
*Student Conveners
Volcano Listserv is a collaborative venture among Arizona State University (ASU), Portland State University (PSU), the Global Volcanism Program (GVP) of the Smithsonian Institution's National Museum of Natural History, and the International Association for Volcanology and Chemistry of the Earth's Interior (IAVCEI).
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