2013 Fiscal Year Final Research Report
Petrological studies on the mode of eruptions
| Project/Area Number |
23510221
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Natural disaster science
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| Research Institution | Kobe University |
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Principal Investigator |
SATO Hiroaki 神戸大学, 理学(系)研究科(研究院), 名誉教授 (60019495)
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| Co-Investigator(Kenkyū-buntansha) |
鈴木 桂子 神戸大学, 理学研究科, 准教授 (20192544)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 噴火様式 / マグマ含水量 / 元素分配 / 斜長石 / 粘性係数 / 富士火山 / 新燃岳 |
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| Research Abstract |
We examined eruption products of explosive and effusive eruptions of Shin-Fuji volcano and Shinmoedake volcano in terms of water contents and viscosity of pre-eruptive magma. Explosive eruption products of Shin-Fuji volcano generally contained >2wt% of water just before the eruption(deduced from plagioclase-melt element partitioning), although some effusive basalts contained >2wt% water while other effusive ones <1wt% of water. The results suggest shallow degassing process may be critical in determining mode of eruptions. We estimated the viscosity of the ejecta of 2011 Shinmoedake volcano, and suggested high viscosity of the crater-filled andesite may preclude large scale drain-back of the lava.
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[Journal Article] Viscosity of andesitic lava and its implications for possible drain-back processes in the 2011 eruption of the Shinmoedake volcano, Japan2013
Author(s)
Sato, H., Suzuki, K., Sato, E., Sano, K., Wada, K., Imura, R
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Journal Title
Earth, Planets and Space
Volume: 65
Pages: 623-631
Peer Reviewed
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[Presentation] Viscosity of andesitic lava and its implications for possible drain-back processes in 2011 eruption of Shinmoedake Volcano2013
Author(s)
Sato, H., Suzuki, K. Sato, E., Sano, K., Wada, K., Imura, R
Organizer
IAVCEI
Place of Presentation
Kagoshima
Year and Date
2013-07-22
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