Two Ph.D. positions in the Dept. of Earth Sciences
1) Understanding the marine barite proxy record of sulfate oxygen and sulfur isotopes (Ph.D.) Barite is considered a reliable proxy for the sulfur and oxygen isotope ratios of dissolved marine sulfate. However, actual data suggests considerable uncertainty in the fidelity of this record. This project aims to explore and understand the sources of this uncertainty. This will be done through a series of lab experiments as well as working with ODP/IODP samples. Excellent grades and experience with sediment samples/geochemistry are required. The position is fully funded for 4 years. The application deadline is January 1st 2020, with a start date of Sept. 2020.
2) Understanding the impact of pyrite dissolution on the Quaternary pCO2 (Ph.D). Large amounts of pyrite are buried on the continental shelves. During glacial sea-level lowstands this pyrites is re-oxidized to sulfate, contributing substantial amounts of acidity into the ocean. In turn, this could affect DIC and alkalinity, and thus marine pCO2. This project aims to explore these fluxes and their effect on marine carbon chemistry. Applicants should have a strong grasp of marine carbon chemistry and computer modeling. The position is fully funded for 4 years. The application deadline is January 1st 2020, with a start date of Sept. 2020.