Intercontinental correlation of organic carbon and carbonate stable isotope records: evidence of climate and sea-evel change during the Turonian (Cretaceous)

0457231 - GFÚ 2016 RIV GB eng J - Journal Article
Jarvis, I. - Trabucho-Alexandre, J. - Gröcke, D. R. - Uličný, David - Laurin, Jiří
Intercontinental correlation of organic carbon and carbonate stable isotope records: evidence of climate and sea-evel change during the Turonian (Cretaceous).
The Depositional Record. Roč. 1, č. 2 (2015), s. 53-90. ISSN 2055-4877
R&D Projects: GA ČR GAP210/10/1991; GA MŠMT LH12041
Institutional support: RVO:67985530
Keywords : carbon isotopes * chemostratigraphy * climate change * Cretaceous * oxygen isotopes
Subject RIV: DB - Geology ; Mineralogy

Carbon and oxygen isotope records are presented for an expanded Upper Cretaceous (Turonian–Coniacian) hemipelagic succession cored in the central Bohemian Cretaceous Basin, Czech Republic. Geophysical logs, biostratigraphy and stable carbon isotope chemostratigraphy provide a high-resolution stratigraphic framework. The d13Ccarb and d13Corg profiles are compared, and the time series correlated with published coeval marine and non-marine isotope records from Europe, North America and Japan. All previously named Turonian carbon isotope events are identified and correlated at high-resolution between multiple sections, in different facies, basins and continents. The viability of using both carbonate and organic matter carbon isotope chemostratigraphy for improved stratigraphic resolution, for placing stage boundaries, and for intercontinental correlation is demonstrated, but anchoring the time series using biostratigraphic data is essential. An Early to Middle Turonian thermal maximum followed by a synchronous episode of stepped cooling throughout Europe during the Middle to Late Turonian is evidenced by bulk carbonate and brachiopod shell d18Ocarb data, and regional changes in the distribution and composition of macrofaunal assemblages.
Permanent Link: http://hdl.handle.net/11104/0257597