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Comprehensive Study on the Dynamics of the Mid-oceanic Ridge Sysytem

大洋中脊系统动力学综合研究

基本信息

批准号：
05302021
负责人：
TAMAKI Kensaku
金额：
$ 13.89万
依托单位：
University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05302021/
关键词：
mid-oceanic ridge marine geophysics the Indian Ocean hydrothermal activity submarine volcano earthquake

项目摘要

This research project is the first large program on the mid-oceanic ridge system. So far the Japanese scientists have been isolated from the dramatic progress of the understanding on the mid-oceanic ridge system. One of the main objectives of this project is to recover this gap to form a national-wide research group on the mid-oceanic ridge system. For this purpose, the budget of the project was divided into each member scientist. We organized two general meetings during two years ; the first meeting is at Inatori, Izu on October 1993, and the second meeting is at Ocean Research Institute, University of Tokyo on February 1995. Furthermore we convened three scientific sessions in the society meetings ; 1994 Japanese Earth Science Societies Joint Meeting at Sendai, 1995 Joint Meeting at Tokyo, and American Geophysical Union 1994 Fall Meeting at San Francisco. The largest product of this research project is the results of the R/V Hakuho-maru research cruise in the Indian Ocean mid-oceanic ridges that is conducted in 1993 by many of member scientists. The detail of earthquake activities, crustal structure, and magmatism were observed for the first time in the area. We succeeded to present a new tectonic model of the development of the triple junction based on these observed data. Other major products of this research project are studies on the detailed structure of the magnetization of the crust beneath the mid-oceanic ridge, on melt generation process beneath the mid-oceanic ridge by the global earthquake tomographic analyzes, on the thermal structure of the mid-oceanic ridge system, and on the hydrothermal activities of the mid-oceanic ridge system. Through the two year project, we consider we attained the initial objective to vividly promote the activity of the mid-oceanic ridge research in Japan.

该研究项目是关于大洋中脊系统的第一个大型项目。到目前为止，日本科学家一直与大洋中脊系统认识的巨大进展隔绝。该项目的主要目标之一是弥补这一差距，以组建一个全国性的大洋中脊系统研究小组。为此目的，项目的预算被分配给每个科学家成员。我们在两年内组织了两次大会;第一次会议于1993年10月在伊豆稻取举行，第二次会议于1995年2月在东京大学海洋研究所举行。此外，我们召开了三次科学会议的社会会议，1994年日本地球科学学会联合会议在仙台，1995年联合会议在东京，和美国地球物理联盟1994年秋季会议在旧金山弗朗西斯科。该研究项目的最大成果是1993年由许多成员科学家在印度洋中洋脊进行的研究船Hakuho-maru研究航行的成果。首次在该区观测到地震活动、地壳结构和岩浆活动的细节。我们成功地提出了一个新的构造模型的发展的三联点的基础上，这些观测数据。这一研究项目的其他主要成果是研究大洋中脊下地壳磁化的详细结构、通过全球地震层析分析研究大洋中脊下的熔体生成过程、大洋中脊系统的热结构和大洋中脊系统的热液活动。通过两年的项目，我们认为我们达到了生动地促进日本大洋中脊研究活动的初步目标。