2009 Fiscal Year Final Research Report
Multidisciplinary study on petit-spot : Clarification about revelation of heterogeneity in the Pacific upper mantle and magma genesis
| Project/Area Number |
20740293
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Geology
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| Research Institution | The University of Tokyo |
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Principal Investigator |
MACHIDA Shiki The University of Tokyo, 海洋研究所, 特任研究員 (40444062)
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| Project Period (FY) |
2008 – 2009
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| Keywords | テクトニクス / マントル化学 / 物質循環 / マグマ・火成岩 |
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| Research Abstract |
Mineralogical and geochemical investigations for basalts from new type volcanoes "petit-spot" were conducted. Investigations clarify that a small-scale heterogeneity of upper mantle, wide-spreading across the Pacific Ocean, was caused by the recycled continental plate materials, that are variable more than expected. Furthermore, it was confirmed that the petit-spot magmatism is a common phenomenon within the Pacific Ocean. Geochemical variations of magma indicate that different source materials and/or isolated process leading from magma genesis to eruption for each small volcano.
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[Presentation] Geochemical Variation of Alkaline Basalts from Petit-spot Volcanoes in the Northwestern Pacific, American Geophysical Union 2009 Fall Meeting2009
Author(s)
Machida, S., N. Hirano, Y. Kato, N. Abe
Organizer
San Francisco, USA, 14-18 December, Eos Trans. AGU, 89 (53), Fall Meet. Suppl.
Place of Presentation
Abstract
Year and Date
20091214-20091218
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[Presentation] Petit-spot, A Unique Window for Viewing Earth Recycling2008
Author(s)
Machida, S., N. Hirano, J. -I. Kimura
Organizer
American Geophysical Union 2008 Fall Meeting, San Francisco, USA, 14-19 December, Eos Trans. AGU, 89 (53), Fall Meet.
Place of Presentation
Abstract
Year and Date
20081214-20081219
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