气候变化领域集成服务门户(CCPortal): The Late Triassic Extinction at the Norian/Rhaetian boundary: Biotic evidence and geochemical signature

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DOI	10.1016/j.earscirev.2020.103180
	The Late Triassic Extinction at the Norian/Rhaetian boundary: Biotic evidence and geochemical signature
	Rigo M.; Onoue T.; Tanner L.H.; Lucas S.G.; Godfrey L.; Katz M.E.; Zaffani M.; Grice K.; Cesar J.; Yamashita D.; Maron M.; Tackett L.S.; Campbell H.; Tateo F.; Concheri G.; Agnini C.; Chiari M.; Bertinelli A.
发表日期	2020
ISSN	00128252
卷号	204
英文摘要	The latest Triassic was an interval of prolonged biotic extinction culminating in the end-Triassic Extinction (ETE). The ETE is now associated with a perturbation of the global carbon cycle just before the end of the Triassic that has been attributed to the extensive volcanism of the Circum-Atlantic Magmatic Province (CAMP). However, we attribute the onset of declining latest Triassic diversity to an older perturbation of the carbon cycle (δ13Corg) of global extent at or very close to the Norian/Rhaetian boundary (NRB). The NRB appears to be the culmination of stepwise biotic turnovers that characterize the latest Triassic and includes global extinctions of significant marine and terrestrial fossil groups. These biotic events across the NRB have been largely under-appreciated, yet together with a coeval disturbance of the carbon cycle were pivotal in the history of the Late Triassic. Here, we present new and published δ13Corg data from widespread sections (Italy, Greece, ODP, Australia, New Zealand, USA, Canada). These sections document a previously unknown perturbation in the carbon cycle of global extent that spanned the NRB. The disturbance extended across the Panthalassa Ocean to both sides of the Pangaean supercontinent and is recorded in both the Northern and Southern Hemispheres. The onset of stepwise Late Triassic extinctions coincides with carbon perturbation (δ13Corg) at the NRB, indicating that a combination of climatic and environmental changes impacted the biota at a global scale. The NRB event may have been triggered either by gas emissions from the eruption of a large igneous province pre-dating the NRB, by a bolide impact of significant size or by some alternative source of greenhouse gas emissions. As yet, it has not been possible to clearly determine which of these trigger scenarios was responsible; the evidence is insufficient to decisively identify the causal mechanism and merits further study. © 2020 Elsevier B.V.
关键词	Late Triassic LIPs Mass extinction Meteorite crater Norian Rhaetian δ13Corg
英文关键词	biostratigraphy; carbon cycle; carbon emission; fossil assemblage; fossil record; greenhouse gas; Norian; paleoenvironment; Rhaetian
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/203861
作者单位	Department of Geosciences, University of Padova, Via G. Gradenigo 6, Padova, 35131, Italy; IGG-CNR (Istituto di Geoscienze e Georisorse), Padova, Firenze, Italy; Department of Earth and Planetary Sciences, Kyushu University, Fukuoka, 819-0355, Japan; Department of Biological and Environmental Sciences, Le Moyne College, Syracuse, NY 13214, United States; New Mexico Museum of Natural History and Science, 1801 Mountain Road NW, Albuquerque, NM 87104, United States; Department of Earth and Planetary Sciences, Rutgers University, Piscataway, NJ 08854, United States; Department of Earth and Environmental Sciences, Rensselaer Polytechnic Institute, 110 8th St, Troy, NY 12180, United States; Western Australian Organic and Isotope Geochemistry Centre, The Institute for Geoscience Research, School of Earth and Planetary Science, Curtin University, GPO BOX U1987, Perth, WA 6845, Australia; Department of Earth Sciences, University of Milan, Via L. Mangiagalli 34, Milan, 20133, Italy; Department of Geosciences, ...
推荐引用方式 GB/T 7714	Rigo M.,Onoue T.,Tanner L.H.,et al. The Late Triassic Extinction at the Norian/Rhaetian boundary: Biotic evidence and geochemical signature[J],2020,204.
APA	Rigo M..,Onoue T..,Tanner L.H..,Lucas S.G..,Godfrey L..,...&Bertinelli A..(2020).The Late Triassic Extinction at the Norian/Rhaetian boundary: Biotic evidence and geochemical signature.Earth Science Reviews,204.
MLA	Rigo M.,et al."The Late Triassic Extinction at the Norian/Rhaetian boundary: Biotic evidence and geochemical signature".Earth Science Reviews 204(2020).