Johannes Pohlner

PhD Student SNSF
Department of Geosciences

PER 07 bu. 4.306
Ch. du Musée 6
1700 Fribourg
PER 07, 4.306



  • since 2018: PhD student, University of Fribourg
  • 2012-2018: BSc and MSc studies, Heidelberg University

Research interests:

  • Igneous and metamorphic petrology
  • Stable isotope geochemistry (Fe, O)
  • Accessory mineral geochronology (baddeleyite, zircon)
  • Paleozoic tectonics (Peri-Gondwana realm and Variscan Orogeny)

Current research:

In my PhD project I focus on the Fe isotope systematics of eclogites and other high-pressure metamorphic rocks in the Münchberg Massif (Germany). Eclogites have experienced a complex history of igneous protolith formation, low-temperature alteration, high-pressure metamorphism in the subducting slab and retrogression. By applying various geochemical and petrologic methods, I try to identify which of these processes are most important for their Fe isotope composition. Further scopes of my project are geochemical cycling and inter-mineral Fe isotope fractionation during the subduction zone metamorphism.

Research and publications

  • articles in peer-reviewed journals

    Pohlner, J. E., Schmitt, A. K., Chamberlain, K. R., Davies, J. H. F. L., Hildenbrand, A., Austermann, G. (2020): Multimethod U–Pb baddeleyite dating: insights from the Spread Eagle Intrusive Complex and Cape St. Mary's sills, Newfoundland, Canada. Geochronology 2, 187–208.

    Pohlner, J. E., El Korh, A., Klemd, R., Grobéty, B., Pettke, T., Chiaradia, M. (2021): Trace element and oxygen isotope study of eclogites and associated rocks from the Münchberg Massif (Germany) with implications on the protolith origin and fluid-rock interactions. Chemical Geology 579, 120352.