2008 Fiscal Year Final Research Report
Deformation, physical evolution of sediments during initial accretion processes and related variation of hydraulic properties
| Project/Area Number |
19740314
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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 | Kyoto University (2008)
National Institute of Advanced Industrial Science and Technology (2007) |
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Principal Investigator |
YAMAMOTO Yuzuru Kyoto University, 大学院・工学研究科, 研究員 (10435753)
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| Project Period (FY) |
2007 – 2008
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| Keywords | テクトニクス / 付加体 / 地震 |
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| Research Abstract |
付加体形成初期の変形にともなう物性変化を被っている堆積物は,肉眼や顕微鏡下で変形構造が確認されないものの,粒子の配列様式と透水特性が大きく異なることが判明した.変形に伴って物性変化を被った堆積物は,被っていない堆積物に比べ最大25%にまで透水係数が小さくなった.また,物性変化を被った堆積物は,地震発生帯上限付近に対応する封圧80MPa付近において,間隙率が急減することが確認され,その深度領域において間隙水を急激に排出し,周辺の強度低下をもたらしている可能性を示した.
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[Journal Article] Pore pressure penetrometers document high overpressure near the seafloor where multiple submarine landslides have occurred on the continental slope, offshore Louisiana, Gulf of Mexico2008
Author(s)
Flemings, P. B., Long, H., Dugan, B., Germaine, J., John, C. M., Behrmann, J. H., Sawer, D., and the Expedition 308 Scientists
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Journal Title
Earth and Planetary Science Letters 269
Pages: 309-325
Peer Reviewed
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[Journal Article] Large-scale chaotically mixed sedimentary body within the Late Pliocene to Pleistocene Chikura Group2007
Author(s)
Yamamoto, Y., Ogawa, Y., Uchino, T., Muraoka, S., and Chiba, T.
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Journal Title
Central Japan, Island Arc 16
Pages: 505-507
Peer Reviewed
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