Open position for a PhD in Carbonate Sedimentology at Fribourg:
The open PhD-position frames within the SNF-funded (Swiss National Science Foundation) project ‘Uncoventional Carbonate Factories in the Eastern Mediterranean: cold-water coral ecosystems and seeps’. The open PhD-position will focus on the impact of dynamic fluxes of methane on (1) authigenic carbonate precipitation and (2) the diagenesis of cold-water coral build-ups. This study will characterize the imprint of microbial-mediated diagenesis (precipitation of secondary mineral phases and the formation of authigenic carbonates) steered through methane seepage in the eastern Mediterranean. The skeletons of coral fragments and sediments subject to continuous methane-mixed fluids will be monitored for several weeks in a bio-reactor to understand aragonite dissolution and authigenic carbonate precipitation mechanisms.
Monitoring will be done in 4D by using X-ray computer tomographic techniques. Besides experimental lab set-ups, sediment cores from the Palmahim Disturbance Zone and Erathostenos Seamount will be characterized to understand the spatial variation of diagenesis (mineralogy, sedimentary petrography, stable isotopes, trace elements and lipid biomarkers). The sulfate-methane transition zone in sediment cores will be traced to explain the role of methane fluxes through the sediments by advanced porewater analyses. Authigenic carbonate crusts will be characterized (mineralogy, sedimentary petrography, stable isotopes, trace elements and lipid biomarkers) and dated to understand the processes and timing of their formation.
More informatin: PhD_Position_Sedimentology_Fribourg