A study of the Arctic Ridge process

该项目的目的是了解北冰洋超慢扩展系统的洋中脊过程。在项目的第二年，我们进行了一次国际跨学科的巡航，获得了超慢扩展脊沿线的高分辨率声纳图像以及其他数据集。巡航前会议于2000年初在圣彼得堡举行，最初的科学计划被设计为使用R/V教授Logachev （VNIIO，圣彼得堡，俄罗斯，5620吨）在Knipovich Ridge集中研究。研究策略包括沿轴拖曳深拖曳侧扫描声纳，外加自记录仪器（光散射传感器、CTD、磁力计和pH计）、地球物理测量（磁学、热流、地震活动）以及海底和水中取样。来自日本、俄罗斯、美国、英国、挪威、中国、台湾和韩国的科学家参加了这次航行。在Knipovich山脊巡航期间（Knipovich-2000巡航），我们获得了400公里长的轴向山谷剖面，约占山脊的75%。我们在声纳剖面上发现了一些热化学异常，表明存在热液活动。还收集了岩石和沉积物样本。我们部署了10台海底地震仪，在火山活动区探测微地震，经过一个月的观测恢复了微地震。该项目的最后一年（2001年）专门用于分析数据和准备出版物。初步结果在日本地球与行星科学联合会议（东京，2001年）上发表。2001年11月，在圣彼得堡举行了一次国际邮轮后会议，以综合研究结果。一篇关于海脊分割的论文已提交给一家国际期刊，其他成果将在一年内提交给相应的期刊。

The purpose of the project is to understand the mid-ocean ridge process at ultra-slow spreading system in the Arctic Ocean. We conducted an international and interdisciplinary cruise in the second year of the project and obtained high-resolution sonar images along the ultra-slow spreading ridge as well as other datasets.The pre-cruise meetings were held in St. Petersburg in early 2000, and the original science plan was devised to focus research at the Knipovich Ridge using the R/V Professor Logachev (VNIIO, St. Petersburg, Russia, 5620 t). The research strategy consists of an along-axis towing of deep-tow side scan sonar with additional self-recording instruments (light scattering sensor, CTD, magnetometer and pH meter), geophysical measurements (magnetics, heat flow, seismicity) and bottom and water sampling. Scientists from Japan, Russia, USA, UK, Norway, China, Taiwan and Korea participated the cruise. During the cruise on the Knipovich Ridge (Knipovich-2000 cruise), we acquired a 400 km-long profile of the axial valley, 〜75% of the ridge. We detected a few thermal and chemical anomalies along the sonar profile, indicating the existence of the hydrothermal activity. Rock and sediment samples were also collected. We deployed 10 ocean bottom seismometers to detect micro earthquakes in the volcanically active area and recovered them after one-month observation.The last year of the project (2001) was devoted to analyze the data and to prepare publications. Preliminary results were reported in the Japan Earth and Planetary Science Joint Meeting (Tokyo, 2001). An international post-cruise meeting was held in St. Petersburg, in November, 2001, to synthesize the results. A paper on the segmentation of the ridge has been submitted to an international journal and other results will be submitted to the appropriate journals within a year.