Oxygen and carbon stable isotope records of the Lochkovian-Pragian boundary interval from the Prague Basin (Lower Devonian, Czech Republic)

0532780 - GLÚ 2021 RIV NL eng J - Journal Article
Weinerová, Hedvika - Bábek, O. - Slavík, Ladislav - Vonhof, H. - Joachimski, M. M. - Hladil, Jindřich
Oxygen and carbon stable isotope records of the Lochkovian-Pragian boundary interval from the Prague Basin (Lower Devonian, Czech Republic).
Palaeogeography, Palaeoclimatology, Palaeoecology. Roč. 560, December (2020), č. článku 110036. ISSN 0031-0182. E-ISSN 1872-616X
R&D Projects: GA ČR(CZ) GA14-18183S; GA ČR(CZ) GA17-06700S
Institutional support: RVO:67985831
Keywords : Palaeozoic * Barrandian area * Climate changes * Conodont apatite * Carbonate Diagenesis
OECD category: Paleontology
Impact factor: 3.318, year: 2020
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0031018220304843

Climate changes close to the Lochkovian-Pragian Event are still widely discussed. Carbonate δ¹⁸O and δ¹³C and conodont apatite δ¹⁸O from medial to distal carbonate ramp sediments were analysed to provide further stable isotope data from the stratotype area in the Prague Basin. The uppermost Silurian to lower Emsian δ¹⁸O trends are put into an updated conodont biostratigraphy framework. Carbonate δ¹⁸O and δ¹³C are discussed in the context of facies-dependent diagenesis. The δ¹³C pattern measured from different sections enables the correlation of intervals with development of different facies inside the Prague Basin. Positive δ¹³C shifts are often coupled with trends of decreasing computed gamma-ray (CGR) values interpreted as regressions, whereas negative δ¹³C shifts commonly coincide with opposite trends in CGR. The Lochkovian-Pragian boundary interval coincided with an increase in carbonate δ¹³C and an increase in the δ¹⁸O of conodont apatite and carbonate, which we interpret as consequence of climate cooling. Generally, the Lochkovian was warmer than the Pragian and earliest Emsian.
Permanent Link: http://hdl.handle.net/11104/0314305