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Dynamic redox and nutrient cycling response to climate forcing in the Mesoproterozoic ocean.
Song, Yafang; Bowyer, Fred T; Mills, Benjamin J W; Merdith, Andrew S; Wignall, Paul B; Peakall, Jeff; Zhang, Shuichang; Wang, Xiaomei; Wang, Huajian; Canfield, Donald E; Shields, Graham A; Poulton, Simon W.
Afiliação
  • Song Y; School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK. eeyso@leeds.ac.uk.
  • Bowyer FT; School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK.
  • Mills BJW; School of GeoSciences, University of Edinburgh, James Hutton Road, Edinburgh, EH9 3FE, UK.
  • Merdith AS; School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK.
  • Wignall PB; School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK.
  • Peakall J; School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK.
  • Zhang S; School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK.
  • Wang X; Key Laboratory of Petroleum Geochemistry, Research Institute of Petroleum Exploration and Development, China National Petroleum Corporation, Beijing, 100083, China.
  • Wang H; Key Laboratory of Petroleum Geochemistry, Research Institute of Petroleum Exploration and Development, China National Petroleum Corporation, Beijing, 100083, China.
  • Canfield DE; Key Laboratory of Petroleum Geochemistry, Research Institute of Petroleum Exploration and Development, China National Petroleum Corporation, Beijing, 100083, China.
  • Shields GA; Nordcee, Department of Biology, University of Southern Denmark, Odense, 5230, Denmark.
  • Poulton SW; Department of Earth Sciences, University College London, London, WC1E 6BT, UK.
Nat Commun ; 14(1): 6640, 2023 Oct 20.
Article em En | MEDLINE | ID: mdl-37863885
Controls on Mesoproterozoic ocean redox heterogeneity, and links to nutrient cycling and oxygenation feedbacks, remain poorly resolved. Here, we report ocean redox and phosphorus cycling across two high-resolution sections from the ~1.4 Ga Xiamaling Formation, North China Craton. In the lower section, fluctuations in trade wind intensity regulated the spatial extent of a ferruginous oxygen minimum zone, promoting phosphorus drawdown and persistent oligotrophic conditions. In the upper section, high but variable continental chemical weathering rates led to periodic fluctuations between highly and weakly euxinic conditions, promoting phosphorus recycling and persistent eutrophication. Biogeochemical modeling demonstrates how changes in geographical location relative to global atmospheric circulation cells could have driven these temporal changes in regional ocean biogeochemistry. Our approach suggests that much of the ocean redox heterogeneity apparent in the Mesoproterozoic record can be explained by climate forcing at individual locations, rather than specific events or step-changes in global oceanic redox conditions.

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2023 Tipo de documento: Article