Radiogenic Neodymium isotope and REE concentrations of authigenic and detrital phases and benthic foraminiferal stable oxygen and carbon isotopes at DSDP Site 72-516, Rio Grande Rise@en

This dataset includes the analysis of sediment core DSDP 516 (30°16'S, 35°17'W, 1313 m water depth) recovered from the Rio Grande Rise within the modern day core of Antarctic Intermediate Water (AAIW). The dataset contains measurements of radiogenic Neodymium (Nd) isotope composition and Rare Earth Element (REE) concentrations of authigenic (mixed planktic foraminifera and non decarbonated bulk sediment leachates) and totally dissolved residual silicate (detrital) fraction. The Nd isotope measurements were made on the Neptune Plus High-Resolution Multi Collector ICP-MS and the Nu Plasma 3 MC-ICPMS and the REE concentrations were measured on the Agilent 7500ce ICP-MS. The dataset also includes benthic foraminiferal stable oxygen and carbon isotopes measured on Cibicidoides Wuellerstorfi using a ThermoScientific MAT 253 mass spectrometer. The dataset provides insights into the variability of AAIW in the South Atlantic Ocean over the last 600,000 years.本数据集涵盖对取自现今南极中层水（Antarctic Intermediate Water, AAIW）核心分布区的里奥格兰德海隆沉积物岩芯DSDP 516（南纬30°16′，西经35°17′，水深1313米）的分析研究。数据集包含自生组分（混合浮游有孔虫与未脱碳酸盐块状沉积物浸出液）及全溶残余硅酸盐（陆源碎屑）组分的放射性钕（Neodymium, Nd）同位素组成与稀土元素（Rare Earth Element, REE）浓度测定数据。钕同位素组成的测定采用Neptune Plus型高分辨率多接收电感耦合等离子体质谱仪与Nu Plasma 3型多接收电感耦合等离子体质谱仪完成，稀土元素浓度则通过Agilent 7500ce型电感耦合等离子体质谱仪测得。数据集还包含针对武氏圆辐虫（Cibicidoides Wuellerstorfi）的底栖有孔虫稳定氧、碳同位素测定数据，该分析工作采用ThermoScientific MAT 253型质谱仪完成。本数据集可为过去60万年以来南大西洋海域南极中层水的演化变化提供关键研究视角。