DOI: 10.1038/ngeo2871
论文题名: Carbon sequestration in an expanded lake system during the Toarcian oceanic anoxic event
作者: Xu W. ; Ruhl M. ; Jenkyns H.C. ; Hesselbo S.P. ; Riding J.B. ; Selby D. ; Naafs B.D.A. ; Weijers J.W.H. ; Pancost R.D. ; Tegelaar E.W. ; Idiz E.F.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2017
卷: 10, 期: 2 起始页码: 129
结束页码: 134
语种: 英语
Scopus关键词: anoxic conditions
; black shale
; burial (geology)
; carbon cycle
; carbon dioxide
; carbon sequestration
; environmental change
; euxinic environment
; geochemical method
; hydrological cycle
; lacustrine environment
; palynology
; perturbation
; radionuclide
; Toarcian
; volcanism
; China
; Sichuan Basin
英文摘要: The Early Jurassic Toarcian oceanic anoxic event (-1/4183 Ma) was marked by marine anoxia-euxinia and globally significant organic-matter burial, accompanied by a major global carbon-cycle perturbation probably linked to Karoo-Ferrar volcanism. Although the Toarcian oceanic anoxic event is well studied in the marine realm, accompanying climatic and environmental change on the continents is poorly understood. Here, utilizing radioisotopic, palynological and geochemical data from lacustrine black shales, we demonstrate that a large lake system developed contemporaneously with the Toarcian oceanic anoxic event in the Sichuan Basin, China, probably due to enhanced hydrological cycling under elevated atmospheric p CO2. We attribute increased lacustrine organic productivity to elevated fluvial nutrient supply, which resulted in the burial of -1/4460 Gt of organic carbon in the Sichuan Basin alone, creating an important negative feedback in the global exogenic carbon cycle. We suggest that enhanced nutrient delivery to marine and large lacustrine systems was a key component in the global carbon cycle recovery during the Toarcian oceanic anoxic event and acted to shorten the duration of the recovery of global 13 C values. © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/105841
Appears in Collections: 气候减缓与适应 科学计划与规划
There are no files associated with this item.
作者单位: Department of Earth Sciences, University of Oxford, Oxford, United Kingdom; Camborne School of Mines and Environment and Sustainability Institute, University of Exeter, Penryn, United Kingdom; British Geological Survey, Keyworth, Nottingham, United Kingdom; Department of Earth Sciences, University of Durham, Durham, United Kingdom; Organic Geochemistry Unit, School of Chemistry and Cabot Institute, University of Bristol, Bristol, United Kingdom; Shell Global Solutions International B.V., Rijswijk, Netherlands
Recommended Citation:
Xu W.,Ruhl M.,Jenkyns H.C.,et al. Carbon sequestration in an expanded lake system during the Toarcian oceanic anoxic event[J]. Nature Geoscience,2017-01-01,10(2)