Deglacial export of pre-aged terrigenous carbon to the Bay of Biscay

The dataset contains geochemical and isotopic data used for the characterisation of the organic matter (OM) present in a sediment core retrieved from the Bay of Biscay (core GeoB23302-2). This includes n-alkane concentrations, values for the branched and isoprenoid tetraether (BIT) index, and the fractional abundance of hopanes (fββ), at various depths of the sedimentary archive. The X-ray fluorescence (XRF) analysis of core GeoB23302-2 returned values for the ratios Fe/Ca and Zr/Rb, which are given in the dataset. Radiocarbon and stable carbon isotopes (bulk OM) and compound-specific radiocarbon data (n-alkanoic acids) are also present in the data file. The age-depth model of core GeoB23302-2 was constructed based on seven radiocarbon accelerator mass spectrometry measurements of planktic foraminifera, which are also reported.

该数据集收录了用于表征从比斯开湾（核心GeoB23302-2）采集的沉积物岩心中存在的有机质（OM）的地球化学和同位素数据。这包括n-烷烃浓度、分支和异戊二烯四萜（BIT）指数以及不同深度沉积物档案中甾烷（fββ）的丰度分数。核心GeoB23302-2的X射线荧光（XRF）分析返回了Fe/Ca和Zr/Rb比率值，这些比率值亦包含在数据集中。数据文件中还包含了放射性碳和稳定碳同位素（总OM）以及特定化合物放射性碳数据（n-烷酸）。核心GeoB23302-2的年龄-深度模型是基于七个浮游有孔虫放射性碳加速器质谱测量构建的，相关数据亦予以报道。