Geochemistry of nummulties as proxy for Eocene climate change in the Southern North Sea Basin

This research concerns the use of geochemical data from well-preserved Large Benthic Foraminifera, i.e. Nummulites, to reconstruct key intervals of the Eocene climate history of NW Europe. By using a paleotemperature proxy equation, temperatures can be reconstructed through the Mg/Ca of fossil Nummulites tests. This PhD will focus on the application and improvement of this proxy by (a) methodological research and (b) high resolution temperature reconstructions of Belgian cores/outcrops, expanded with sample locations from the northern Hampshire Basin. Additional element ratios, grainsize analysis, organic and stable isotope data will allow for paleoenvironmental reconstructions of the North Sea Basin during the Eocene. Additionally Nummulites have the ability to record seasonality due to their longer livespan (i.e. average of 5 years). This ability to record seasonal temperature changes will be assessed through laser ablation of the individual chambers.