Tracing ocean pH/acidification at the Early Jurassic (Pliensbachian-Toarcian) and Permo-Triassic extinction events
My research project focuses on the reconstruction of ancient ocean pH during the Early Jurassic (Pliensbachian-Toarcian, approx. 183 million years ago) and Permian-Triassic (approx. 250 million years ago) extinction events. Ocean acidification is a proposed driver for both extinction events triggered by the release of high amounts of carbon dioxide, which were probably due to the occurrence of major flood basalts. To test this hypothesis I am going to construct high-resolution boron isotope profiles on marine carbonates and calcifying marine species to trace changes in ocean pH and their influence on marine organisms. Sampling of micritic carbonates from shallow water environments for the Early Jurassic extinction event are carried out in the Lusitanian Basin (Portugal) and in the Celtiberian Chains (Spain). For the Permo-Triassic boundary the Julfa and Abadeh region in northwestern and central Iran are envisaged, respectively.
This PhD project is part of the interdisciplinary research group TERSANE
Field Trip Lusitanian Basin (Portugal) - November 2016
Field Trip Keltiberian Chains (Spain) - September 2017
- stable isotope geochemistry (B, O, C)
- mass spectrometry
- climate research
2016 - recent
PhD student at MARUM, University of Bremen
|2013 - 2016||MSc Geosciences, Johann Wolfgang Goethe-University Frankfurt/ Main
'Reconstruction of deep ocean circulation across the Rio Grande Rise during the opening of the South Atlantic Ocean during Maastrichtian - Early Paleocene times'
Supervisors: Prof. Dr. Silke Voigt, Dr. Sietske J. Batenburg
|2009 - 2013||
BSc Geosciences, Johann Wolfgang Goethe-University Frankfurt/ Main
'Pliocene high-resolution benthic isotope stratigraphy and bottom water paleoceanography of North Atlantic Ocean Site 552A'
Supervisors: Prof. Dr. Jens O. Herrle, Dr. Cyrus Karas
Klein, T., Anette Meixner, Kasemann, S., Duarte, L. V., Wood, R.A. (August 2018). "New insights into environmental conditions for the Early Jurassic Toarcian Oceanic Anoxic Event from boron and lithium isotopes" At Goldschmidt in Boston/USA and IGCP 655 - TOAE in Coimbra/Portugal