Number of the records: 1
Jurassic – Cretaceous boundary record in Carpathian sedimentary sequences
- 1.
SYSNO ASEP 0536625 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Jurassic – Cretaceous boundary record in Carpathian sedimentary sequences Author(s) Michalík, J. (SK)
Grabowski, J. (PL)
Lintnerová, O. (SK)
Reháková, D. (SK)
Kdýr, Šimon (GLU-S) SAI, ORCID
Schnabl, Petr (GLU-S) RID, SAI, ORCIDArticle number 104659 Source Title Cretaceous Research. - : Elsevier - ISSN 0195-6671
Roč. 118, February (2021)Number of pages 19 s. Language eng - English Country GB - United Kingdom Keywords Lithostratigraphy ; Microfacies ; Sequence stratigraphy ; Calcareous microplankton ; Nannoplankton ; Stable isotopes ; Magnetostratigraphy Subject RIV DB - Geology ; Mineralogy OECD category Geology R&D Projects GA20-10035S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support GLU-S - RVO:67985831 UT WOS 000595936500002 EID SCOPUS 85096209707 DOI https://doi.org/10.1016/j.cretres.2020.104659 Annotation An integrated study of micro- and nannoplankton distribution, O and C isotopes and palaeomagnetic record of nine Carpathian sections provided a key interpretation tool to characterize the Jurassic–Cretaceous (J/K) boundary transition. Biostratigraphy supported by saccocomids, radiolarians, calpionellids, dinoflagellates and nannofossils helped to distinguish biostratigraphic zones which could have been correlated both with stable isotopes and with magnetostratigraphy. The Alpina Event (lorica size change) accompanied by Nannoconus wintereri and N. steinmannii minor FO's designates the J/K boundary.
Sedimentary model in N Mediterranean Tethys margin consists of elevated blocks with slow (1–2 mm/ka) Rosso Ammonitico carbonate sedimentation separated by dysoxic depressions. Tectonic instability has been indicated by Upper Jurassic fluxoturbidites.
Late early Tithonian (M21n to M20r) saccocomid abundance increases with positive δ18O isotope ratios, similar excursion between M20n and M19r accompanied late Tithonian crassicollarian boom. The δ13C variation (>0.2‰) confronted with microplankton quantity variations: positive excursion occurred both during early Tithonian Saccocoma sp., and during late Tithonian calpionellid and nannoconid blooms. Higher up in the Berriasian “Maiolica” sequence, lighter δ13C values prevailed.
During late Tithonian (Praetintinnopsella-to earliest Crassicollaria zones, M20n1n to M19r), Saccocoma microfacies has been substituted by a calpionellid one. Reorganization of Tethyan oceanic currents during opening of the Hispanic corridor started planktonic carbonate particle „rain“ resulting in the Maiolica facies dominance. Sedimentary rate raised ten times. Calpionella alpina lorica size change event was synchronneous with FO's of Nannoconus wintereri and N. steinmannii minor and with negative δ18O trend of latest Tithonian (Colomi Subzone) warming. Expressiveness of eccentricity and obliquity cycles indicates climatic optimum conditions.Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Tel.: 226 800 273 Year of Publishing 2022 Electronic address https://www.sciencedirect.com/science/article/abs/pii/S0195667120303451
Number of the records: 1