Winter semester 23/24
17.04.2024
Prof Andrea Erhardt (University of Kentucky)
Linking ocean circulation and chemistry over time - understanding unconformities, redox chemistry, and carbonate diagenesis on the Southern Campbell Plateau
Changing redox conditions with pore fluids can result in sediment precipitation, dissolution, and replacement reactions. These changes can be especially pronounced in the redox zone between where sulfate reduction and methanogenesis dominate, termed the sulfate-methane transition zone (SMTZ). At IODP Site 378-U1553 on the southern Campbell Plateau, changing circulation, sedimentation patterns, and the impact of a 26 million-year unconformity have impacted both the pore water geochemistry and likely altered sediment chemistry. This study compares the sulfur isotopes measured on pyrites from Paleocene sediments with sediment geochemistry. High sulfur isotope variability is observed in the pyrite samples and evaluated within the context of changes in paleogeography, shifts in terrestrial vs marine organic matter, and shifts in the SMTZ. Finally, we will consider the potential role methane migrations may play in this core. If the methane is migrating from deeper sediments into sulfate-bearing pore waters, this could result in an expanded SMTZ. Overall, we believe that changing depositional conditions are the overall control on the redox chemistry of this site.
24.04.2024
To be announced
To be announced
08.05.2024
Prof Alexander Webb (Freie Universität Berlin)
To be announced
15.05.2024
To be announced
To be announced
22.05.2024
To be announced
To be announced
29.05.2024
Prof Philipp Ruprecht (University of Nevada, Reno)
To be announced
05.06.2024
Prof Lucie Tajcmanova (Universität Heidelberg)
To be announced
12.06.2024
Kurt Kment
Entwicklung der Ammoniten nach der Trias/Jura Grenze
19.06.2024
Habilitationskolloquium – nicht hochschulöffentlich
26.06.2024
To be announced
To be announced
03.07.2024
Dr Anne-Katrin Broocks (Freie Universität Berlin)
Die Inklusion marginalisierter Perspektiven in sozioökologische Forschungen am Beispiel der Mangrovenforschung in Ecuador und der Klima-Kipppunkt-Forschung im Amazonas: Eine ethnografisch-wissenssoziologische Herangehensweise
10.07.2024
To be announced
Probevorlesung / Habilitationsverfahren – hochschulöffentlich
