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Title: Thermomechanical controls on magma supply and volcanic deformation: application to Aira caldera, Japan.
Authors: Hickey, James
Gottsmann, Joachim
Nakamichi, Haruhisa  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-5501-0965 (unconfirmed)
Iguchi, Masato  kyouindb  KAKEN_id
Author's alias: 中道, 治久
井口, 正人
Issue Date: 13-Sep-2016
Publisher: Springer Nature
Journal title: Scientific reports
Volume: 6
Thesis number: 32691
Abstract: Ground deformation often precedes volcanic eruptions, and results from complex interactions between source processes and the thermomechanical behaviour of surrounding rocks. Previous models aiming to constrain source processes were unable to include realistic mechanical and thermal rock properties, and the role of thermomechanical heterogeneity in magma accumulation was unclear. Here we show how spatio-temporal deformation and magma reservoir evolution are fundamentally controlled by three-dimensional thermomechanical heterogeneity. Using the example of continued inflation at Aira caldera, Japan, we demonstrate that magma is accumulating faster than it can be erupted, and the current uplift is approaching the level inferred prior to the violent 1914 Plinian eruption. Magma storage conditions coincide with estimates for the caldera-forming reservoir ~29, 000 years ago, and the inferred magma supply rate indicates a ~130-year timeframe to amass enough magma to feed a future 1914-sized eruption. These new inferences are important for eruption forecasting and risk mitigation, and have significant implications for the interpretations of volcanic deformation worldwide.
Description: カルデラにおけるマグマ蓄積形態と蓄積速度 : 地下における3次元弾性定数と熱プロセスの考慮の重要性. 京都大学プレスリリース. 2016-09-21.
Rights: © The Author(s) 2016. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
URI: http://hdl.handle.net/2433/216625
DOI(Published Version): 10.1038/srep32691
PubMed ID: 27619897
Related Link: http://www.kyoto-u.ac.jp/ja/research/research_results/2016/160913_2.html
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