Stable isotope and element/Calcium ratios of Plio/Pleistocene planktic foraminifers (G. bulloides, N. pachyderma, G. umbilicata & G. inflata) of core SO264_28-2

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 ~3.4 million years. This dataset comprises planktic stable carbon (δ13C) and oxygen isotope (δ18O) data, as well as foraminiferal element/Calcium ratios from gravity core SO264-28-2, which was recovered from Suiko Seamount (44°51.547 N 170°03.997 E) from 1935 m water depth. Measurements were performed on the planktic foraminiferal species Globigerina bulloides, Neogloboquadrina pachyderma sinistral and dextral, Globigerina umbilicata, and Globorotalia inflata. Sampling and analytical studies were carried out from 0.00–7.62 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SONNE号科考船（RV SONNE）的SO264航次（航次代号SONNE-EMPEROR）采集自火山型帝王海山链（Emperor Seamount Chain）的沉积岩芯，可用于重建过去约340万年间北太平洋远洋带副极地与副热带环流的横向变化。本数据集包含采自重力岩芯SO264-28-2的浮游有孔虫稳定碳同位素（δ¹³C）、氧同位素（δ¹⁸O）数据，以及有孔虫元素/钙比值数据；该岩芯采自水深1935米的须磨海山（Suiko Seamount，坐标44°51.547 N 170°03.997 E）。本次分析测试针对以下浮游有孔虫物种开展：球室抱球虫（Globigerina bulloides）、左旋与右旋厚壳新抱球虫（Neogloboquadrina pachyderma）、脐孔球虫（Globigerina umbilicata）以及膨胀抱球虫（Globorotalia inflata）。采样与分析工作针对该岩芯0.00–7.62米的深度段开展，采样空间分辨率约为2厘米。同位素分析采用赛默飞世尔科技（Thermo Scientific）MAT 253型质谱仪，搭配自动化Kiel IV碳酸盐样品前处理装置完成；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原子发射光谱仪（ICP-OES）完成。