The Permian-Triassic boundary in the Karavanke Mountains (Slovenia): Stable isotope variations in the boundary carbonate rocks of the Košutnik Creek and Brsnina section
AbstractThe stable isotope composition of the Upper Permian and Lower Triassic beds at two locations (Košutnik Creek and Brsnina) in the Southern Karavanke Mountains has been used to investigate δ13C and δ18O variations of the well exposed undisturbed marine carbonate sequence across the Permian-Triassic boundary. The lithostratigraphic boundary between the Lower Triassic-Scythyan and underlying Upper Permian beds is transitional and no exact line can be drawn between them. The transition from Permian to Triassic is characterized by a major shift in carbonate carbon δ13C and δ18O from heavier to lighter values. The results suggest that the carbon isotope variability at the P/Tr boundary reflects global changes in the carbon cycle and/or climatic changes, probably controlled by the Upper Permian regression and further eustatic oscillations of the Tethys sea level and by tectonic. The corresponding δ18O variability should be regarded as indication of seawater oxygen isotopic composition, salinity and temperature changes, changes in carbonate mineralogy of the rocks, postdepositional alterations or some combinations of all the mentioned possibilities.
How to Cite
Dolenec, T., Buser, S., & Dolenec, M. (1998). The Permian-Triassic boundary in the Karavanke Mountains (Slovenia): Stable isotope variations in the boundary carbonate rocks of the Košutnik Creek and Brsnina section . Geologija, 41(1), 17–27. https://doi.org/10.5474/geologija.1998.001