globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2016.12.004
论文题名:
Sinemurian–Pliensbachian calcareous nannofossil biostratigraphy and organic carbon isotope stratigraphy in the Paris Basin: Calibration to the ammonite biozonation of NW Europe
作者: Peti L.; Thibault N.; Clémence M.-E.; Korte C.; Dommergues J.-L.; Bougeault C.; Pellenard P.; Jelby M.E.; Ullmann C.V.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
卷: 468
起始页码: 142
结束页码: 161
语种: 英语
英文关键词: Coccoliths ; Lower Jurassic ; Sancerre-Couy ; Semi-quantitative biostratigraphy
英文摘要: The biostratigraphy of Sinemurian to lower Toarcian calcareous nannofossils has been investigated in the Sancerre-Couy core (Paris Basin), which contains a mixed assemblage of species with affinities to the northern and southern areas of the peri-tethyan realm, thus allowing for the use and calibration of the Mediterranean Province (Italy/S France) and NW Europe (UK) biozonation schemes. This study is based on semi-quantitative analyses of the calcareous nannofossil assemblage performed on 145 samples and the recorded bioevents are calibrated to the NW European Ammonite Zonation and to a new organic carbon isotope curve based on 385 data points. The main bioevents, i.e. the first occurrences of Parhabdolithus liasicus, Crepidolithus pliensbachensis, Crepidolithus crassus, Mitrolithus lenticularis, Similiscutum cruciulus sensu lato, Lotharingius hauffii, Crepidolithus cavus and Lotharingius sigillatus as well as the last occurrence of Parhabdolithus robustus, have been identified. However, we show that a large number of standard biostratigraphic markers show inconsistent occurrences at the base and top of their range, possibly accounting for some of the significant discrepancies observed between the different domains. In addition to the nine main bioevents used for the biozonation of the core, we document an additional 50 distinct bioevents, evaluate their reliability and discuss their potential significance by comparison to previous studies. A total of five significant negative organic carbon isotope excursions are identified and defined in the Paris Basin including the well-documented Sinemurian–Pliensbachian boundary event. One positive excursion is further defined in the Pliensbachian interval. Our calibration of high-resolution calcareous nannofossil biostratigraphy to ammonite biostratigraphy and organic carbon isotopes represents a new stratigraphic reference for the Lower Jurassic series. © 2016 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/67967
Appears in Collections:过去全球变化的重建

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作者单位: Department of Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, Copenhagen K, Denmark; University of Innsbruck, Institute of Geology, Faculty of Geo- and Atmospheric Sciences, Innrain 52, Innsbruck, Austria; Biogeosciences, UMR CNRS/uB 6282, Univ. Bourgogne Franche-Comté, 6 Boulevard Gabriel, Dijon, France; Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5-7, Copenhagen K, Denmark; University of Exeter, Camborne School of Mines & Environment and Sustainability Institute, Penryn Campus, Penryn, Cornwall, United Kingdom; School of Environment, University of Auckland, PB 92019, 23 Symonds Street, Auckland, New Zealand

Recommended Citation:
Peti L.,Thibault N.,Clémence M.-E.,et al. Sinemurian–Pliensbachian calcareous nannofossil biostratigraphy and organic carbon isotope stratigraphy in the Paris Basin: Calibration to the ammonite biozonation of NW Europe[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01,468
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