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Phosphorus-limited conditions in the early Neoproterozoic ocean maintained low levels of atmospheric oxygen
Guilbaud, Romain1; Poulton, Simon W.2; Thompson, Jennifer2; Husband, Kathryn F.2; Zhu, Maoyan3,4,5; Zhou, Ying6; Shields, Graham A.6; Lenton, Timothy M.7
2020-03-02
Source PublicationNATURE GEOSCIENCE
ISSN1752-0894
Pages7
Abstract

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 similar to 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. Early Neoproterozoic marine productivity fell due to nutrient drawdown following a switch from an iron-rich to a sulfide-rich ocean, according to records of phosphorus geochemistry measured from sedimentary sections in North China.

DOI10.1038/s41561-020-0548-7
Indexed BySCI
Language英语
WOS KeywordWATER-COLUMN ANOXIA ; FERRUGINOUS CONDITIONS ; IRON ; CARBON ; EVOLUTION ; OXIDATION ; BURIAL ; RISE ; REGENERATION ; PRODUCTIVITY
Funding ProjectNERC[NE/I005978/1] ; NSFC[41661134048] ; NSFC[NE/P013651] ; Chinese Academy of Sciences[XDB18000000] ; Royal Society Wolfson Research Merit Awards ; Leverhulme Trust Fellowship
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000517739500002
Funding OrganizationNERC ; NSFC ; Chinese Academy of Sciences ; Royal Society Wolfson Research Merit Awards ; Leverhulme Trust Fellowship
PublisherNATURE PUBLISHING GROUP
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/31599
Collection中国科学院南京地质古生物研究所
Corresponding AuthorGuilbaud, Romain
Affiliation1.Univ Toulouse, CNRS, Geosci Environm Toulouse, Toulouse, France
2.Univ Leeds, Sch Earth & Environm, Leeds, W Yorkshire, England
3.Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing, Peoples R China
4.Nanjing Inst Geol & Palaeontol, Ctr Excellence Life & Paleoenvironm, Nanjing, Peoples R China
5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
6.UCL, Dept Earth Sci, London, England
7.Univ Exeter, Global Syst Inst, Exeter, Devon, England
Recommended Citation
GB/T 7714
Guilbaud, Romain,Poulton, Simon W.,Thompson, Jennifer,et al. Phosphorus-limited conditions in the early Neoproterozoic ocean maintained low levels of atmospheric oxygen[J]. NATURE GEOSCIENCE,2020:7.
APA Guilbaud, Romain.,Poulton, Simon W..,Thompson, Jennifer.,Husband, Kathryn F..,Zhu, Maoyan.,...&Lenton, Timothy M..(2020).Phosphorus-limited conditions in the early Neoproterozoic ocean maintained low levels of atmospheric oxygen.NATURE GEOSCIENCE,7.
MLA Guilbaud, Romain,et al."Phosphorus-limited conditions in the early Neoproterozoic ocean maintained low levels of atmospheric oxygen".NATURE GEOSCIENCE (2020):7.
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