2014 Fiscal Year Final Research Report
Microstructure and Physical Properties of intergranular Geofluids
| Project Area | Geofluids: Nature and dynamics of fluids in subduction zones |
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| Project/Area Number |
21109005
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
KAWAMURA Katsuyuki 岡山大学, 環境生命科学研究科, 教授 (00126038)
HIRAGA Takehiko 東京大学, 地震研究所, 准教授 (10444077)
UEHARA Shinichi 東邦大学, 理学部, 准教授 (20378813)
竹内 康明 (ICHIKAWA Yasuaki) 岡山大学, 環境生命科学研究科, 教授 (30126833)
WATANABE Tohru 富山大学, 大学院理工学研究部(理学), 教授 (30262497)
TAKEI Yasuko 東京大学, 地震研究所, 准教授 (30323653)
SHIMIZU Ichiko 東京大学, 理学(系)研究科(研究院), 助教 (40211966)
KANZAKI Masami 岡山大学, 地球物質科学研究センター, 教授 (90234153)
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| Project Period (FY) |
2009-04-01 – 2015-03-31
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| Keywords | 地殻流体 / 岩石物性 / 岩石粒界 / 分子動力学 / 弾性波速度 |
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| Outline of Final Research Achievements |
In order to estimate the distribution and amount of inter-granular fluids based on the geophysical observations of the crust in subduction zones, we determined elastic wave velocities and electrical resistivities of some rocks, fluids and their composites. For the purpose of building a “Geofluid Map”, following outcomes were obtained: grain size sensitivivities of seismic wave attenuation in polycrystalline aggregates were formulated in a wide frequency range; anisotropy of seismic wave velocities of serpentinite was determined, and geological and petrological constraints on the lithological structure of the Northeastern Japan arc were compiled. We also determined the frictional behavior of fault clays and serpentine gauges and chemical transport mechanisms between fluids and polycrystalline rocks, and formulated CO2-fluxing through volcanic magma-feeding systems. These have contributed to create a new research fields “Geofluid Dynamic”.
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| Free Research Field |
岩石学・火山学
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