The grain-size analysis data (short sediment cores from the Arcona, Bornholm, and Gdansk Basins of the Baltic Sea)@en

The data for the paleoenvironmental study was obtained on the basis of complex analysis of short sediment cores retrieved in the Arcona, Bornholm, and Gdansk Basins of the Baltic Sea. The cores were collected using a short gravity sediment corer (Niemistö type). The upper layers (0-5 cm) of sediment cores were stained with the 80% ethanol solution of rose Bengal following the protocol (Schönfeld et al., 2012) and were used only for the microfossil analysis. The rests of the cores (below the 5 cm) were continuously sampled with the 1 cm step and were used for the loss on ignition (LOI), microfossil, X-ray fluorescence (XRF), and grain-size analyzes. The grain-size analysis was performed with the laser diffraction particle analyser SALD-2300 (Shimadzu). Prior to the analysis the carbonates were dissolved with the hydrochloric acid and organic matter was dissolved with the hydrogen peroxide, following the method of McCave et al. (1995).本古环境研究的数据集，源自对波罗的海阿尔科纳（Arcona）盆地、博恩霍尔姆（Bornholm）盆地及格但斯克（Gdansk）盆地采集的短沉积岩芯开展的综合分析。上述岩芯采用Niemistö型短重力沉积物取样器（short gravity sediment corer）采集。沉积岩芯的表层（0~5 cm）按照Schönfeld等（2012）的实验方案，使用孟加拉玫瑰红（rose Bengal）的80%乙醇溶液进行染色，仅用于微体古生物分析。岩芯剩余部分（5 cm以下）以1 cm为间隔进行连续取样，用于烧失量（loss on ignition, LOI）、微体古生物、X射线荧光（X-ray fluorescence, XRF）及粒度分析。粒度分析采用岛津（Shimadzu）SALD-2300型激光衍射颗粒分析仪完成。按照McCave等（1995）的实验方法，分析前先用盐酸溶去碳酸盐组分，再以过氧化氢去除有机质。