Modeling of explosive subaqueous eruptions
| Project/Area Number |
26400491
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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 |
Geology
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| Research Institution | Kagoshima University |
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Principal Investigator |
Kano Kazuhiko 鹿児島大学, 総合研究博物館, 教授 (40356811)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 爆発的水底噴火 / マグマ水蒸気噴火 / 水蒸気噴火 / ジェット粉砕 / 水冷破砕 / 水和 / 気孔数密度 / 粒径分布 / 気孔数密度分布 / 水底噴火起源タービダイト / アグルチネート / コーンシート / 水冷スパター / 爆発的海底噴火 / 水冷火山弾 / 自破砕 / マグマ噴火 |
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| Outline of Final Research Achievements |
Water-chilled bombs collected from the Miocene deep marine successions of the Shimane Peninsula have a vesicle-number density distribution and a porosity indicative of a Strombolian-like eruptive process. In a Miocene shallow-marine pyroclastic cone of the same Peninsula, scoria-agglutinate fills the conduit but the correlative eruption-fed scoria-density-current deposits are much finer-grained with minor projectiles, suggesting water-ingestion and explosive water-particle interactions in the plumes or currents. Pyroclastic density current deposits from Katsumayama volcano are composed mainly of rhyolitic perlite clasts, being produced through water quenching, hydration-induced cracking and explosive heating water to steam. These case studies show external water play an important role in explosive subaqueous eruptions.
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Report
(4 results)
Research Products
(17 results)
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[Presentation] 爆発的海底噴火の謎に迫る2014
Author(s)
鹿野和彦
Organizer
鹿児島県地学会講演会
Place of Presentation
鹿児島県文化センター会議室（鹿児島県鹿児島市）
Year and Date
2014-11-15
Related Report
Invited
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