A study of the Arctic Ridge process

该项目的目的是了解北冰洋超慢扩散系统的大洋中脊过程。我们在项目的第二年进行了一次国际和跨学科的巡航，获得了沿超慢扩展脊线的高分辨率声纳图像以及其他数据集。巡航前的会议于2000年初在圣彼得堡举行，最初的科学计划是利用R/V教授Logachev(VNIIO，俄罗斯圣彼得堡，5620吨)在Knipovich Ridge进行重点研究。研究战略包括沿轴线拖曳深拖侧扫描声纳和附加的自我记录仪器(光散射传感器、CTD、磁力计和酸碱仪)、地球物理测量(磁学、热流、地震)以及海底和水样采样。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邮轮。在Knipovich Ridge(Knipovich-2000邮轮)的巡航中，我们获得了400公里长的轴谷剖面，约占脊线的75%。我们沿声纳剖面探测到一些热和化学异常，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台海底地震仪来探测火山活跃区的微震，并在一个月的观测后恢复了它们。该项目的最后一年(2001年)专门用于分析数据和准备出版物。日本地球和行星科学联席会议(2001年，东京)报告了初步结果。2001年11月在圣彼得堡举行了一次国际邮轮后会议，以综合结果。一篇关于脊线分割的论文已经提交给一家国际期刊，其他成果将在一年内提交给适当的期刊。

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.