Sr isotope ratios of Mn nodules collected around Minamitorishima Island, western North Pacific Ocean

We measured Sr isotope ratios of Mn nodule samples collected in the pelagic area around Minamitorishima Island, the western North Pacific Ocean, as the representative data of Mn-oxides, which is an endmember component in the deep-sea sediments. The Mn nodules were collected by the submersible SHINKAI 6500 during dives 6K#1463 and 6K#1465 of YK16-01 cruise by R/V Yokosuka, in 2016. The Mn nodules in this area consist of three layers, L0, L1, and L2, which were identified by Machida et al. (2016, Geochemical Journal). For this dataset, we subsampled from five points in 6K#1463 N2-007 (one subsample from L0, two from L1, and two from L2) and from three points in 6K#1465 N4-003 (one subsample each from L0, L1, and L2).

本研究测定了西太平洋南鸟岛周边远洋海域采集的锰结核样品的锶同位素比值，作为深海沉积物中氧化锰矿物端元组分的代表性数据。2016年，研究团队搭乘“横须贺”号（R/V Yokosuka）执行YK16-01科考航次，通过载人潜水器“深海6500”（SHINKAI 6500）完成6K#1463和6K#1465两次下潜任务，采集了本研究使用的锰结核样品。该区域的锰结核可分为L0、L1、L2三个圈层，该分层方案由Machida等人于2016年发表于《地球化学杂志》（Geochemical Journal）。针对本数据集，我们从6K#1463航次的N2-007站位的5个取样点（从L0、L1、L2圈层分别采集1、2、2个二次样品），以及6K#1465航次的N4-003站位的3个取样点（从L0、L1、L2圈层各采集1个二次样品）完成了二次取样。