气候变化领域集成服务门户(CCPortal): The asynchronous disappearance of conodonts: New constraints from Triassic-Jurassic boundary sections in the Tethys and Panthalassa

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DOI	10.1016/j.earscirev.2020.103176
	The asynchronous disappearance of conodonts: New constraints from Triassic-Jurassic boundary sections in the Tethys and Panthalassa
	Du Y.; Chiari M.; Karádi V.; Nicora A.; Onoue T.; Pálfy J.; Roghi G.; Tomimatsu Y.; Rigo M.
发表日期	2020
ISSN	00128252
卷号	203
英文摘要	The End-Triassic Extinction event (ETE) has been recognized in numerous sections worldwide and it is usually marked by three negative carbon isotope excursions (NCIEs), named “precursor” (P-NCIE), “initial” (I-NCIE) and “main” (M-NCIE) negative carbon isotope excursions. These three NCIEs are significant characteristics of this time interval, and they are likely related to the emplacement of the Central Atlantic Magmatic Province (CAMP) that is considered the main trigger of the ETE. Stable carbon isotope excursions, commonly related to biotic turnovers and extinctions, play an important role in stratigraphic correlations, particularly around the Triassic-Jurassic boundary (TJB). This time interval records the disappearance of conodonts, elements of a feeding apparatus belonging to marine organisms that populated the Paleozoic-early Mesozoic seas, and which became extinct across the TJB. So far, the interpretation of conodont extinction has remained ambiguous, as the timing of its last occurrence was debated which in turn hindered our understanding of the main cause(s) that could have led to their disappearance. Here we present and compare integrated data of nine TJB sections from different areas, Tethys and Panthalassa, and different depositional environments, i.e. shallow vs deep water or proximal vs distal shelf. Each of these sections record both the last occurrences of latest Triassic conodont taxa and pronounced changes in the carbon isotopic composition of organic matter across the TJB interval. Our analysis of chemo- and integrated biostratigraphic correlation suggests that the final extinction of the taxon Conodonta was asynchronous. © 2020
关键词	Ammonoids Carbon isotopes Conodont extinction Extirpation Integrated biostratigraphy Panthalassa Radiolarians Tethys
英文关键词	biostratigraphy; carbon isotope; conodont; depositional environment; extinction; Jurassic; taxonomy; Tethys; Triassic; Ammonoidea; Conodonta; Radiolaria (protozoans)
语种	英语
来源期刊	Earth Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203693
作者单位	Department of Geosciences, University of Padova, via Gradenigo 6, Padova, 35131, Italy; Institute of Geosciences and Earth Resources (IGG − CNR), Via Giorgio la Pira, 4, Florence, 50121, Italy; Department of Palaeontology, Eötvös Loránd University, Pázmány Péter stny 1/c, Budapest, 1117, Hungary; Department of Earth Sciences “Ardito Desio”, University of Milan, Via Mangiagalli 34, Milan, 20133, Italy; Department of Earth and Planetary Sciences, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka, Japan; Department of Geology, Eötvös Loránd University, Budapest, H-1117, Hungary; MTA–MTM–ELTE Research Group for Paleontology, P.O. Box 137, Budapest, H-1431, Hungary; Isotope Climatalogy and Environmental Research Centre (ICER), Institute for Nuclear Research, Bem tér 18/C, Debrecen, H-4026, Hungary; Institute of Geosciences and Earth Resources (IGG − CNR), via Gradenigo 6, Padova, 35131, Italy; Department of Earth and Environmental Sciences, Kumamoto University, Kumamoto, 860-8555, Japan
推荐引用方式 GB/T 7714	Du Y.,Chiari M.,Karádi V.,et al. The asynchronous disappearance of conodonts: New constraints from Triassic-Jurassic boundary sections in the Tethys and Panthalassa[J],2020,203.
APA	Du Y..,Chiari M..,Karádi V..,Nicora A..,Onoue T..,...&Rigo M..(2020).The asynchronous disappearance of conodonts: New constraints from Triassic-Jurassic boundary sections in the Tethys and Panthalassa.Earth Science Reviews,203.
MLA	Du Y.,et al."The asynchronous disappearance of conodonts: New constraints from Triassic-Jurassic boundary sections in the Tethys and Panthalassa".Earth Science Reviews 203(2020).