| Project/Area Number |
25400509
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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 |
Petrology/Mineralogy/Economic geology
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| Research Institution | Waseda University (2014-2015)
The University of Tokyo (2013) |
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Principal Investigator |
Suzuki Yuki 早稲田大学, 教育・総合科学学術院, 講師 (00374918)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
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| Keywords | 新燃岳 / マグマ供給系 / マッシュ状珪長質マグマ / マグマ混合 / 噴火誘発過程 / 拡散プロファイル / 噴火誘発 / 磁鉄鉱 / 新燃岳2011年噴火 / 準プリニー式噴火 / ブルカノ式噴火 / 火口溶岩蓄積 / 見かけ密度 / 石基結晶度 / 脱ガス |
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| Outline of Final Research Achievements |
Eruption triggering process was studied for the Shinmoe-dake 2011 eruption. First, I clarified two points; 1) the eruption was triggered by the remobilization of mush-like felsic magma through injection of high temperature magma, and 2) the plumbing system of the two magmas that formed the final product (mixed magmas). Second, I discussed timescale from magma mixing to eruption and their correlation with eruption timing, focusing on sub-Plinian events in the climactic stage in the 2011 eruption. For this purpose, I examined diffusion profiles of magnetites originated from the felsic magma. Because the sub-Plinian events occurred intermittently, I took intermittent injection of high temperature magma into account. Due to the importance of eruption timing in this study, I newly clarified the boundary between the first and second sub-Plinian deposit by using groundmass textures of the juvenile material.
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