| Career Summary |
1991: Post-Doctoral Fellow of JSPS at the Ocean Research Institute, the University of Tokyo
1993: Research Associate at the Geological Institute, the University of Tokyo
2001: Associate Professor at the Ocean Research Institute, the University of Tokyo
2006-present: Associate Professor at Graduate School of Frontier Sciences, the University of Tokyo
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| Educational Activities |
Graduate School: Hadal Environmental Science, Fundamentals of Natural Environmental Studies
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| Research Activities |
1. Studies of fault activities and tectono-sedimentary processes in plate subduction zones
2. Studies of methane hydrates in active tectonic regions
3. Growth process of mud volcanoes and its implications for tectonics and paleoenvironments
4. Origin, migration and venting of fluids in accretionary prisms
Distributions of active faults in the Nankai Trough
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Literature
1) Toki, T., Tsunogai, U., Gamo, T., , Kuramoto, S. and Ashi, J., 2004, Detection of low-chloride fluids beneath a cold seep field on the Nankai accretionary wedge off Kumano, south of Japan, Earth Planet. Sci. Lett., 228, 37-47.
2) Ashi, J., Tokuyama, H. and Taira, A., 2002, Distribution of methane hydrate BSRs and its implication for the prism growth in the Nankai Trough, Marine Geology, 187, 117-191.
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| Other Activities |
Geological Society of Japan
Seismological Society of Japan
American Geophysical Union
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| Future Plan |
Fluids in subduction zones play important roles in deformation, thermal structure and material cycle. We have studied subsurface and surface expressions of fluid/gas migration such as methane hydrate, cold seep, and mud volcano in order to determine the relationships between behavior of fluids/gases and the growth of an accretionary prism. Our group attempts to discover more dynamic processes using in-situ monitoring, high-resolution surveys and pinpoint sampling at deep-sea.
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| Messages to Students |
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The deep-sea floor is very active and closely linked to our lives beyond what might imagine. Our group has several remote-sensing instruments, sampling and observation at deep-sea. You are welcome to join us in studying the active processes of subduction zones for revealing earthquakes, tsunamis and natural resources. |
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