DOI: 10.1016/j.gloplacha.2015.01.013
论文题名: Carbon isotope records reveal synchronicity between carbon cycle perturbation and the "Carnian Pluvial Event" in the Tethys realm (Late Triassic)
作者: Dal Corso J. ; Gianolla P. ; Newton R.J. ; Franceschi M. ; Roghi G. ; Caggiati M. ; Raucsik B. ; Budai T. ; Haas J. ; Preto N.
刊名: Global and Planetary Change
ISSN: 0921-8181
出版年: 2015
卷: 127 起始页码: 79
结束页码: 90
语种: 英语
英文关键词: Carbon isotope
; Carbonate crisis
; Carnian Pluvial Event
; Late Triassic
; Oxygen depletion
Scopus关键词: Atmospheric thermodynamics
; Carbon
; Carbon dioxide
; Carbonation
; Deposition
; Isotopes
; Lithology
; Petrography
; Rain
; Stratigraphy
; Atmosphere-ocean system
; Carbon isotopes
; Carnian Pluvial Event
; Late Triassic
; Negative carbon isotope excursions
; Oxygen depletion
; Shallow water environment
; Temporal relationships
; Organic carbon
; biomarker
; carbon cycle
; carbon isotope
; carbonate platform
; Carnian
; dolomite
; isotopic composition
; paleoclimate
; Pangaea
; sedimentology
; shallow water
; synchrony
; Tethys
; Italy
; algae
; Embryophyta
; Metazoa
英文摘要: In the early Late Triassic a period of increased rainfall, named the Carnian Pluvial Event (CPE), is evidenced by major lithological changes in continental and marine successions worldwide. The environmental change seems to be closely associated with a negative carbon isotope excursion that was identified in a stratigraphic succession of the Dolomites (Italy) but the temporal relationship between these phenomena is still not well defined. Here we present organic-carbon isotope data from Carnian deep-water stratigraphic sections in Austria and Hungary, and carbonate petrography of samples from a marginal marine section in Italy. A negative 2-4‰ δ13C shift is recorded by bulk organic matter in the studied sections and is coincident with a similar feature highlighted in higher plant and marine algal biomarker carbon-isotope records from the Dolomites (Italy), thus testifying to a global change in the isotopic composition of the reservoirs of the exchangeable carbon. Our new observations verify that sedimentological changes related to the CPE coincide with the carbon cycle perturbation and therefore occurred synchronously within the western Tethys. Consistent with modern observations, our results show that the injection of 13C-depleted CO2 into the Carnian atmosphere-ocean system may have been directly responsible for the increase in rainfall by intensifying the Pangaean mega-monsoon activity. The consequent increased continental weathering and erosion led to the transfer of large amounts of siliciclastics into the basins that were rapidly filled up, while the increased nutrient flux triggered the local development of anoxia. The new carbonate petrography data show that these changes also coincided with the demise of platform microbial carbonate factories and their replacement with metazoan driven carbonate deposition. This had the effect of considerably decreasing carbonate deposition in shallow water environments. © 2014 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84922372753&doi=10.1016%2fj.gloplacha.2015.01.013&partnerID=40&md5=1900bfe7c1115753180a5563545c0d0e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11551
Appears in Collections: 全球变化的国际研究计划 气候变化与战略
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作者单位: Dipartimento di Geoscienze, Università degli Studi di Padova, Via Gradenigo 6, Padova, Italy
Recommended Citation:
Dal Corso J.,Gianolla P.,Newton R.J.,et al. Carbon isotope records reveal synchronicity between carbon cycle perturbation and the "Carnian Pluvial Event" in the Tethys realm (Late Triassic)[J]. Global and Planetary Change,2015-01-01,127.