This data set presents 14 bulk sample-based X-ray Fluorescence (XRF) measurements. For XRF sample preparation freeze-dried sediments (8 g) were seaved (2mm) to discard the gravel fraction and large organic matter. Further homogenization was undertaken by grinding the samples with a vibratory Retsch mill MM 200. Uniform pellets were created by pressing the powdered samples with a carbon-based binding agent in a Vaneox press at 20 t for 2 min. Elemental analyses were conducted in a He atmosphere using a Spectro Xepos energy dispersive XRF spectrometer.

File descriptions: Measurement reproducibilityvery good: very good reproducibility, highly reliable datamoderate: moderate reproducibility (values can be used in terms of proportions within this data set)poor: data should be treated with caution, since the values were measured close to the detection limit!poor # = individual values are secured, since concentrations are based on measurements with >1000 pulses