One half of all ELSA-20 cores was segmented into 10 cm increments, which were taken as one sample. The inner part of the segment was sampled under clean lab conditions for biomarker and DNA analysis, the rest of the segment was sampled into one sample, dried with a freeze dry device and homogenized. The sampling of SMfreeze, HM4, AU3 and AU4 resulted in 1000 samples, which are the ELSA-20-Stack. The table below presents the source of the samples from each core in detail and the basic analysis.
All of these samples were analyzed with classical sedimentological techniques (Loss on ignition, CaCO3, grain size) to quantify the aeolian dust proportion (Fuhrmann et al. 2021 in press.). The analysis of pollen, spores, alkanes, GDGTs and another biomarker is ongoing. Respective papers are scheduled for the later part of 2021.
The ELSA Project provides aliquots from the ELSA-20-Stack samples to everybody, who is interested. However, it is taken care, that analysis and scientific topics are not duplicated. Ongoing work on the ELSA-20-Stack samples comprises alkanes, GDGTs, sterols, stanols, DNA, 10Be, paleomagnetism, Delta Deuterium of bulk and several components, 7Lithium, 14C of ostracods, isotopy of alkanes, sterols, stanols, hyperspectral scanning.