气候变化领域集成服务门户(CCPortal): Tethyan carbonate platform transformations during the Early Jurassic (Sinemurian-Pliensbachian, Southern Alps): Comparison with the Late Triassic Carnian Pluvial Episode

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DOI	10.1130/B31765.1
	Tethyan carbonate platform transformations during the Early Jurassic (Sinemurian-Pliensbachian, Southern Alps): Comparison with the Late Triassic Carnian Pluvial Episode
	Franceschi M.; Dal Corso J.; Cobianchi M.; Roghi G.; Penasa L.; Picotti V.; Preto N.
发表日期	2019
ISSN	167606
起始页码	1255
结束页码	1275
卷号	131 期号:2021-07-08
英文摘要	Early Jurassic shallow water carbonate environments of Tethys experienced important changes in a context of rifting that climaxed with the final break-up of Pangea. This time was also characterized by major perturbations of the global carbon cycle, some of which likely linked to the emplacement of large igneous provinces. At the Sinemurian- Pliensbachian (Early Jurassic) transition a globally recognized carbon isotope perturbation named "S-P Event" was found. In the western Tethys, this coincided with important architectural changes in the carbonate platforms which switched from peritidal flats to subtidal rimmed lagoons. A similar evolution in carbonate systems was observed during the Carnian Pluvial Episode (Late Triassic) when a global carbon isotope perturbation coincided with the demise of microbial carbonate platforms in the Tethys. In this paper, new carbonate and organic carbon isotope records and quantitative petrography data (modal analysis) from the deep- and shallow-water Sinemurian- Pliensbachian sedimentary successions exposed in the central Southern Alps of Italy are presented. Data show that across two negative carbon isotope excursions the carbonate factory abruptly changed and a drop in the microbial fraction of the carbonate occurred. This suggests that environmental modifications associated with these isotope excursions impacted the type of carbonate production and were a key-factor in determining the evolution of Tethyan carbonate platforms. New results and a comparison between the S-P Event and the Carnian Pluvial Episode highlight striking commonalities and imply that the demise of microbial carbonate systems coincident to isotope perturbations is not an isolated event in geologic history. Microbialites, therefore, do not necessarily represent "crisis facies" following extinction events. Rather, their development or demise appears linked to yet poorly understood mechanisms governing the interaction between global climate changes and shallowwater carbonate sedimentation. © 2019 Geological Society of America.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184952
作者单位	Department of Geosciences, Università degli Studi di Padova, Via Giovanni Gradenigo, 6, Padova, 35131, Italy; State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Hubei, 430074, China; Hanse-Wissenschaftskolleg (HWK), Institute for Advanced Study, Lehmkuhlenbusch, 4, Delmenhorst, 27753, Germany; School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, United Kingdom; Dipartimento di Scienze della Terra e dell'Ambiente, Università di Pavia, Via Adolfo Ferrata, 7, Pavia, 27100, Italy; Istituto di Geoscienze e Georisorse-CNR, Via Giovanni Gradenigo, 6, Padova, 35131, Italy; Geologisches Institut, Eidgenössische Technische Hochschule Zürich, Sonneggstrasse, 5, Zürich, 8092, Switzerland
推荐引用方式 GB/T 7714	Franceschi M.,Dal Corso J.,Cobianchi M.,et al. Tethyan carbonate platform transformations during the Early Jurassic (Sinemurian-Pliensbachian, Southern Alps): Comparison with the Late Triassic Carnian Pluvial Episode[J],2019,131(2021-07-08).
APA	Franceschi M..,Dal Corso J..,Cobianchi M..,Roghi G..,Penasa L..,...&Preto N..(2019).Tethyan carbonate platform transformations during the Early Jurassic (Sinemurian-Pliensbachian, Southern Alps): Comparison with the Late Triassic Carnian Pluvial Episode.Bulletin of the Geological Society of America,131(2021-07-08).
MLA	Franceschi M.,et al."Tethyan carbonate platform transformations during the Early Jurassic (Sinemurian-Pliensbachian, Southern Alps): Comparison with the Late Triassic Carnian Pluvial Episode".Bulletin of the Geological Society of America 131.2021-07-08(2019).