International Cooperative Research on the Mid-Ocean Ridges

大洋中脊国际合作研究

基本信息

批准号：
06044050
负责人：
FUJIMOTO Hiromi
金额：
$ 9.28万
依托单位：
University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for international Scientific Research
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

项目摘要

This research program aims international scientific joint researches on the seafloor spreading system in the framework of the IntrerRidge Program, which is an international initiatives to unveil the interdisciplinary activities of the global mid-ocean ridge system.Cooperative researches were carried out in this fiscal year on board five foreign cruises. Three were focused on analysis of seafloor magnetic structures with a shipboard three-component magnetometer (STCM) developed in Japan. Main results are (1) age-dependent variation in the effective depth of the magnetic layr off the West Coast of USA (Melville, USA), (2) variation in discontinuity structures in the slow-spreading Southwestern Indian Ridge (I'Atalante, France), and (3) relationship between magnetic intensity and rock minerals on the fast-spreading Pacific-Antarctic Ridge south of New Zealand (I'Atalante, France). Other two cruises aimed at searching for hydrothermal activities (4) on the Central Indian Ridge (Sonne, Germany), and (5) in the Derugin Basin in the Okhotsk Sea (Gagarinski, Russia). Active vent site still have not been found in the Indian Ocean. Surveys were also carried out on land in Oman ophiolites and found a structure indicating ridge propagation.Another activities supported by this program are participation in the planning activities mainly for for InterRidge Phase-II program. Dr.Tamaki is a member of InterRidge Steering Committee and will lead the planning activities related with back-arc basin researches and construction of midocean ridge digital data bases. Dr.Fujimoto, a member of SCOR WG99 at linked mass and energy fluxes at ridge crests, joined the activities and worked to publish a SCOR WG pamphlet.Another important aspect of this program is to have broaden the scientific community in our country. Big joint sessions on the Earth's spreading systems have been held in the Geophysical Joint Spring Meeting in Japan.

该研究计划旨在在Intrerridge计划框架中对海底扩散系统进行国际科学联合研究，该研究是一项国际举措，旨在揭示全球中境山脊系统的跨学科活动。在本财政年度进行了五次外国巡游。三个专注于在日本开发的船上三元磁力计（STCM）的海底磁性结构分析。 Main results are (1) age-dependent variation in the effective depth of the magnetic layr off the West Coast of USA (Melville, USA), (2) variation in discontinuity structures in the slow-spreading Southwestern Indian Ridge (I'Atalante, France), and (3) relationship between magnetic intensity and rock minerals on the fast-spreading Pacific-Antarctic Ridge south of New Zealand (I'Atalante, 法国）。其他两次巡游旨在在印度中部山脊（德国Sonne）和（5）在Okhotsk Sea（俄罗斯Gagarinski）的Derugin盆地中寻找水热活动（4）。在印度洋仍未发现活跃的排气场所。还在阿曼蛇酵母的土地上进行了调查，发现了一个指示山脊传播的结构。该计划支持的另一个活动是参加主要用于Interidge II期计划的计划活动。 Tamaki博士是Interidge指导委员会的成员，将领导与后弧盆地研究和Midocean Ridge数字数据基础的建设有关的计划活动。 Fujimoto博士是Ridge Crests的Linked Mass和Energy Fluxes的SCOR WG99成员，加入了活动，并努力出版SCOR WG小册子。该计划的另一个重要方面是扩大我们国家的科学界。在日本的地球物理联合春季会议上举行了地球传播系统上的大型联合会议。