| Co-Investigator(Kenkyū-buntansha) |
ISEZAKI Nobuhiro Faculty of Science, Chiba University, Professor, 理学部, 教授 (60107943)
MEVEL Catherrine Earthquake Research Institute, the University of Tokyo, Associate Professor, 地質学部, 主任研究員
NAKANISHI Masao Laboratiire de Petrologie, the Universite Pierre at Marine Curie, Researcher, 海洋研究所, 助手 (80222165)
OOTA Suguru Ocean Research Institute, the University of Tokyo, Professor, 海洋研究所, 教授 (10013591)
FUJIMOT Hiromi Ocean Research Institute, the University of Tokyo, Associate Professor, 海洋研究所, 助教授 (50107455)
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| Research Abstract |
This program corresponds to the InterRidge program, an international initiative of mid-oceanic ridge studies. The funds of this program are mainly used for travels of ridge researchers in Japan for participating cruises, attending workshops, program planning meetings, and society meetings. The other part of usage is transportation of instruments for the research cruises. The research cruises that the researchers of this program participated cover the global ridge system including the Juan de Fuca Ridge, the East Pacific Rise, the Mid-Atlantic Ridge, the Southwestern Indian Ridge, the Central Indian Ridge, and the western Pacific back-arc basins ridges. The major achievements were done in the studies in the Southwestern Ridge. Five research cruises were executed at the Southwestern Indian Ridge during this program. Multinarrow bathymetric survey, deep-tow sidescan sonnar survey, gravity and magnetic measurements, ocean bottom seismometer measurements, and bottom rock sampling were done. The compilation of these data sets clearly shows the unique segmentation pattern of this ridge, the ultraslow spreading system with striking heterogeneity of crustal structure and intensively focused magmatism.
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