Core Viewpoint - The research conducted by the team led by Deng Yinan reveals a new mechanism for the cycling and enrichment of rare earth elements in deep-sea environments, which is significant for understanding the formation of deep-sea rare earth resources [1][2]. Group 1: Research Findings - The study identifies a dual cycling model for marine rare earth elements, consisting of a "top-down" removal process and a "bottom-up" release process, highlighting that shallow marine sediments release significant amounts of rare earth elements back into the seawater, while deep-sea sediments retain most of the rare earths [2]. - It was found that the total input of rare earth elements from deep-sea hydrothermal areas to seawater is significantly higher than that from non-hydrothermal areas, primarily due to the presence of hydrothermal manganese-iron oxide particles that release rare earths at the water-rock interface [2]. - The research emphasizes the critical role of early diagenesis at the water-rock interface in influencing the cycling of marine rare earth elements, providing new theoretical perspectives and scientific basis for the assessment and exploration of deep-sea rare earth resources [2].

据介绍，本航次计划时长35天，共有来自国内多家涉海科研院校的34个课题组、47名科考队员参加。该航次是学校深海前沿中心自主设计实施、开放共享的 常态化科考航次，围绕深海大洋前沿科学问题，在常态化观测的基础上，重点聚焦中尺度涡旋与亚中尺度锋面过程，深入探究动力过程对海洋生物地球化学 循环的调控机制及其生态环境效应。 据了解，"东方红3"科考船是我国自主创新研发的新型深远海综合科考实习船，今年该船已安全、高效、高水平完成了5个深远海科考航次任务，在航时间 240余天，航程达32000海里。 （总台记者 王伟 柳栋） 近日，中国海洋大学"东方红3"科考船从山东青岛启航，赴西北太平洋执行综合科考任务。 ...