International Cooperative Research on the mid-Oceanic Ridges

该计划与大洋中脊研究的国际倡议--国际海脊计划相对应。这项计划的资金主要用于山脊研究人员在日本参加巡航、参加研讨会、项目策划会议和社会会议的旅行。另一部分用途是为研究巡航运送仪器。该项目的研究人员参与的研究巡航涵盖了全球海脊系统，包括胡安德·富卡海脊、东太平洋隆起、大西洋中部海脊、西南印度洋海脊、中印度海脊和西太平洋弧后盆地海脊。主要研究成果集中在西南山脊地区。在这个项目期间，在西南印度山脊进行了五次研究巡航。进行了多箭水深测量、深拖侧向扫描声纳测量、重磁测量、海底地震仪测量和海底岩石取样。这些数据集的汇编清楚地显示了该海脊独特的分段模式、地壳结构具有显著非均质性的超低扩张系统和强烈聚焦的岩浆活动。

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.