PhD student MSc student
| Franz Neubauer |
Christoph Leitner, Anja Schorn
Manfred Bernroider, Johann Genser
Istvan Dunkl, University of Göttingen
The project is studying the potential use of polyhalite, a K-Ca-Mg-sulphate, for dating low-temperature processes and tectonic deformation of tectonic evaporite mélanges by the 40Ar/39Ar method. The ongoing work include (1) 40Ar/39Ar dating of polyhalite formed during distinct geological processes, (2) characterization of microfabrics of polyhalite-bearing rocks such as rocksalt and anhydrite, (3) 40Ar/39Arbiotite as well as zircon and apatite fission track and (U-Th)/He analysis of magmatic and siliciclastic blocks in order to cross-check the results from step (1). The study will focus on the evaporitic Haselgebirge mélange of latest Permian to Early Triassic depositional age in the Eastern Alps.
SCHORN, A., NEUBAUER, F., 2014 (in press). The structure of the Hallstatt evaporite body (Northern Calcareous Alps, Austria): a compressive diapir superposed by strike-slip shear?, Journal of Structural Geology, 60, 70-84. http://dx.doi.org/10.1016/j.jsg.2013.12.008.
LEITNER, C., NEUBAUER, F., GENSER, J., BOROJEVIĆ-ŠOŠTARIĆ, B., RANTITSCH, G., 2013. 40Ar/39Ar ages of crystallisation and recrystallisation of rock-forming polyhalite in Alpine rocksalt deposit. In: JOURDAN, F., MARK, D. F. & VERATI, C. (eds.) 2013. Advances in 40Ar/39Ar Dating from Archaeology to Planetary Sciences. Geological Society, London, Special Publications, 378, 18 p., http://dx.doi.org/10.1144/SP378.5.
Polyhalite: a key for dating sedimentary and tectonic processes of evaporites, FWF P22728