Stable isotope (δ13C and δ18O) and element/Calcium ratios of Plio/Pleistocene planktic foraminifers (G. bulloides, N. pachyderma sin., G. inflata) of core SO264_53-2 (Minnetonka Seamount)

Sediment cores from the volcanic Emperor Seamount Chain obtained during RV SONNE cruise SO264 (SONNE-EMPEROR) in August 2018 allow us to reconstruct lateral changes in the subarctic and subtropical gyres in the pelagic North Pacific over the last ~0.5 million years. This dataset comprises planktic stable carbon (δ13C) and oxygen isotope (δ18O) data, as well as foraminiferal element/Calcium ratios from gravity core SO264_53-2, which was recovered from Minnetonka Seamount (47°38.931 N 169°20.417 E) from 2325 m water depth. Measurements were performed on the planktic foraminiferal species Globigerina bulloides and Neogloboquadrina pachyderma sinistral, and Globorotalia inflata. Sampling and analytical studies were carried out from 0.005–8.605 m core depth at ~2 cm spatial resolution. The isotope analyses were performed on a Thermo Scientific MAT 253 mass spectrometer with an automated Kiel IV carbonate preparation device. Trace metal analyses were performed on a VARIAN 720-ES Axial ICP-OES.

2018年8月，通过松号（RV SONNE）科考船SO264航次（SONNE-EMPEROR）获取的火山成因天皇海岭（Emperor Seamount Chain）沉积岩芯，可为我们重建北太平洋远洋区过去约50万年间副极地与副热带环流系统的横向变化特征提供数据支撑。本数据集包含浮游有孔虫稳定碳（δ¹³C）、氧同位素（δ¹⁸O）数据，以及取自水深2325米处明尼通卡海山（Minnetonka Seamount，北纬47°38.931′，东经169°20.417′）的重力岩芯SO264_53-2的有孔虫元素/钙比值数据。本次分析的浮游有孔虫物种为Globigerina bulloides、Neogloboquadrina pachyderma sinistral及Globorotalia inflata。采样与分析工作在岩芯深度0.005~8.605米区间开展，空间分辨率约为2厘米。同位素分析采用赛默飞世尔科技（Thermo Scientific）MAT 253质谱仪，搭配自动化Kiel IV碳酸盐制样装置完成。痕量金属分析则通过瓦里安（VARIAN）720-ES轴向电感耦合等离子体发射光谱仪（ICP-OES）完成。