globalchange  > 气候变化与战略
DOI: 10.1038/s41561-020-0548-7
论文题名:
Phosphorus-limited conditions in the early Neoproterozoic ocean maintained low levels of atmospheric oxygen
作者: Guilbaud R.; Poulton S.W.; Thompson J.; Husband K.F.; Zhu M.; Zhou Y.; Shields G.A.; Lenton T.M.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2020
卷: 13, 期:4
起始页码: 296
结束页码: 301
语种: 英语
英文关键词: biogeochemical cycle ; continental margin ; euxinic environment ; nutrient limitation ; oligotrophic environment ; oxygen ; phosphorus ; primary production ; Proterozoic ; redox conditions ; succession ; sulfide ; Anhui ; China ; Huainan
英文摘要: The redox chemistry of anoxic continental margin settings evolved from widespread sulfide-containing (euxinic) conditions to a global ferruginous (iron-containing) state in the early Neoproterozoic era (from ~1 to 0.8 billion years ago). Ocean redox chemistry exerts a strong control on the biogeochemical cycling of phosphorus, a limiting nutrient, and hence on primary production, but the response of the phosphorus cycle to this major ocean redox transition has not been investigated. Here, we use a geochemical speciation technique to investigate the phase partitioning of phosphorus in an open marine, early Neoproterozoic succession from the Huainan Basin, North China. We find that effective removal of bioavailable phosphorus in association with iron minerals in a globally ferruginous ocean resulted in oligotrophic (nutrient limited) conditions, and hence a probable global decrease in primary production, organic carbon burial and, subsequently, oxygen production. Nevertheless, phosphorus availability and organic carbon burial were sufficient to maintain an oxidizing atmosphere. These data imply substantial nutrient-driven variability in atmospheric oxygen levels through the Proterozoic, rather than the stable levels commonly invoked. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169603
Appears in Collections:气候变化与战略

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作者单位: Géosciences Environnement Toulouse, Université de Toulouse, CNRS, Toulouse, France; School of Earth and Environment, University of Leeds, Leeds, United Kingdom; State Key Laboratory of Palaeobiology and Stratigraphy and Center for Excellence in Life and Paleoenvironment, Nanjing Institute of Geology and Palaeontology, Nanjing, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China; Department of Earth Sciences, University College London, London, United Kingdom; Global Systems Institute, University of Exeter, Exeter, United Kingdom

Recommended Citation:
Guilbaud R.,Poulton S.W.,Thompson J.,et al. Phosphorus-limited conditions in the early Neoproterozoic ocean maintained low levels of atmospheric oxygen[J]. Nature Geoscience,2020-01-01,13(4)
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