2003 Fiscal Year Final Research Report Summary
Research on ancient seismogenic faults around plate boundaries from view points of fluid inclusion and miero-seale mineralization
| Project/Area Number |
13304038
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Geology
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| Research Institution | University of Tsukuba |
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Principal Investigator |
OGAWA Uujiro University of Tsukuba, Institute of Geosceience, Professor, 地球科学系, 教授 (20060064)
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| Co-Investigator(Kenkyū-buntansha) |
ANMA Ryo University of Tsukuba, Insutitute of Geoscience, Lecturer, 地球科学系, 講師 (70311595)
YAGI Hisako (平井 寿子) University of Tsukuba, Insutitute of Geoscience, Lecturer, 地球科学系, 講師 (60218758)
KIMATA Mitsuyoshi University of Tsukuba, Insutitute of Geoscience, Professor, 地球科学系, 教授 (20143167)
SAKAGUCHI Arito Japan Marine Science & Technology Center, Researcher, 研究員 (80304666)
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| Project Period (FY) |
2001 – 2003
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| Keywords | plate tectonics / seismogenic fault / hydrothermal vein / Quid inclusion / methane hydrate / mineral deformation / Raman spectroscopy / ICP-MS |
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| Research Abstract |
This year is the final year of the research project and many results were come out and some of them were published in the international journals. The most basic equipment for this project, the Raman spectroscopy, could do both on DAC and thin sections, and this is the first aim for geoscience. It could detect the high pressure phase of gas hydrate, and many natural minerals in micrometer scale under transparent microscope. In geoscientific results, we found many new observations, among which the pseudotachylyte from the ancient plate boundary fault was the most profound result. Another interesting result is that we found bimodal fluid flows in the Ordovician accretionary prism boundary fault in Scotland. Some of the pelagic to terrigenous sediments were analyzed from micrometer scale before and after entering to the accretionary prisms. All of these results were displayed in the international meetings or published in journals. In addition we did an extensive study on the plate boundary faults and related deformation and fluid flow in the Mienoka ophiolite. We elucidated several stages from the deformed basaltic rocks. As above, our final goal was accomplished
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[Publications] Orihaslu, Y, Motoki, A., Hirata, D., Halter, M.J., Ramos, V.A., Ota, T., Yoshida, H., Anma, R.: "Zircon geochemistry of Mid-Miocene adakites in the southern Patagonian province"The 13th Goldschmidt Conference, Kurashiki, Japan, Spetember 7-12, Geochim. Cosmochim. Acta Spec.. Suppl.. A364-A364 (2003)
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[Publications] Hirai, H., Tanaka, T., Yamamoto, Y., Kawamura, T., Yagi, T.: "Retention of filled ice structure of methane hydrate up to 42 GPa"Phys.Rev.B. 68[17]. 172-102-1-172, 102-4 (2003)
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[Publications] Kato, A., Sakaguchi, A., Yoshida, S., Mochizuki, H., Kaneda, Y.: "Permeability measurements and precipitation sealing of basalt in the ancient exhumed fault in subduction zone"Bulletin of Earthquake Research Institute, (University of Tokyo). 78. 83-89 (2003)
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[Publications] Takahasi, A., Ogawa, Y., Ohta, Y., Hirano, N.: "The nature of faulting and deformation in the Mineoka Ophiolite, NW Pacific Rim"Geological Society of London (Dilek, Y., Robinson, P.(eds)). Special Publication, 128, Ophiolite in Earth History. (2004)
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[Publications] Hirano, N., Ogawa, Y., Saito, K., Yoshida, T., Sate, H., Taniguchi, H.: "Multi-stage evolution of the Tertiary Mineoka Ophiolite in the NW Pacific as revealed by new geochemical and age constraints"Geological Soc.of London (Dilek, Y., Robinson, P.(eds)). Special Pub., 128, Ophiolite in Earth History. (2004)
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