Integrated Research on the Mid-oceanic Ridge by Internationally Co-operated Expeditions

该项目推动InterRidge日本作为InterRidge国际项目的一部分，资助支付InterRidge成员费用(每年20,000-25,000美元)，日本海脊科学家参加国内和国际大洋中脊研究巡航和国际海脊会议，如InterRidge指导委员会、InterRidge研讨会、研讨会和理论研究所的旅行，以及邀请外国海脊研究科学家。通过这些支持，日本作为与英国、美国、法国和德国一起的五个主要成员国之一，为InterRidge(目前的成员国数量为29个)做出了主要贡献。该项目的两名成员被任命为InterRidge指导委员会成员。在四年的时间里，在该项目的部分资金支持下，共进行了14次大洋中游研究。研究领域包括海洋地质、海洋地球物理、水地球化学、海洋生物和海洋技术。日本在热液地球化学、海洋微生物学和海洋技术领域做出了特别贡献。安装了三分量磁强计的AUV(自主水下航行器)考察根据西太平洋马里亚纳海槽的热液活动程度演示了地壳的退磁作用。IODP Juan de Fuca Ridge钻探证明了大洋中脊周围洋壳的区域水循环，该项目为该项目提供了部分资金支持。在西南印度洋海脊进行的合作考察发现了海底广泛暴露的地幔岩石，这表明了一种具有极低岩浆活动的超慢扩张系统的基本机制。2006年，我们在中印度洋海脊的热液区域进行了潜水研究巡航，我们成功地获得了有价值的微生物和热液矿化样品，目前正在进行分析。

This project promoted InterRidge Japan as a part of InterRidge International Project with the financial supports for the payment of member's fee of InterRidge (20,000-25,000 US$ annually), travels of Japanese ridge scientists for participating domestic and international mid-oceanic ridge research cruises and InterRidge meetings such as an InterRidge steering committee, InterRidge Symposiums, Workshops, and Theoretical Institutes, and for inviting foreign ridge research scientists. By these supports Japan made a principal contribution to the InterRidge (current number of the member countries is 29) as one of five principal member countries with UK, US, France, and Germany. Two members of this projects are appointed as members of the InterRidge Steering Committee. During four years, 14 mid-oceanic research cruises were conducted with the partial financial supports by this project. The research fields cover marine geology, marine geophysics, water geochemistry, marine biology, and ocean technology. Japan specially contributed in the fields of hydrothermal geochemistry, marine microbiology, and ocean technology. AUV (Autonomous Underwater Vehicle) expedition with three-component magnetometer installed demonstrated the demagnetization of the crust according to the extent of hydrothermal activity at the Mariana Trough in the Western Pacific. Regional water circulation in the oceanic crusts around the mid-oceanic ridge was evidenced by IODP Juan de Fuca Ridge drilling for which this project made partial financial support. The cooperated expedition research at the Southwestern Indian Ridge found wide exposures of mantle rocks on the sea floor which suggest a fundamental mechanism of ultra-slow spreading system with very low magmatism. In 2006 diving research cruises were conducted at the hydrothermal area at the Central Indian Ridge and we succeeded to obtain valuable samples of microbiology and hydrothermal mineralization which analyses are currently ongoing.