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dc.contributor.authorStueeken, Eva E.
dc.identifier.citationStueeken , E E 2020 , ' Hydrothermal vents and organic ligands sustained the Precambrian copper budget ' , Geochemical Perspectives Letters , vol. 16 , pp. 12-16 .
dc.identifier.otherPURE: 271445796
dc.identifier.otherPURE UUID: fba25a04-4284-4841-8c58-0a77b64f6873
dc.identifier.otherORCID: /0000-0001-6861-2490/work/84315350
dc.identifier.otherWOS: 000591660800001
dc.identifier.otherScopus: 85124081805
dc.description.abstractThe bioavailability of metals in the early ocean is a key parameter for understanding the evolution and expansion of Earth’s biosphere. Theoretical work suggested extremely low Zn and Cu levels in Precambrian seawater, but these predictions are not supported by recent geochemical data. One explanation for this discrepancy is a strong hydrothermal influx of metals and/or stabilisation in solution by organic ligands. Here new models are constructed to test this hypothesis for the solubility of Cu. The results show that hydrothermal vents constituted the major source of Cu to the Archean ocean, but higher ocean temperatures or higher levels of organic matter may have been needed to stabilise dissolved Cu in seawater. From the Proterozoic onwards, rivers contributed most of the marine Cu budget and concentrations were probably close to the modern range, even if the residence time of Cu in seawater was shorter than today. Biological Cu limitation was thus probably lifted in the Proterozoic, but the origin of Cu toxicity for cyanobacteria likely emerged in the Archean. The results provide a new interpretive framework for geochemical records.
dc.relation.ispartofGeochemical Perspectives Lettersen
dc.rightsCopyright © 2020 The Authors. Open Access. Published by the European Association of Geochemistry under Creative Commons License CC BY-NC-ND 4.0.en
dc.subjectCopper bioavailabilityen
dc.subjectHydrothermal ventsen
dc.subjectPrecambrian seawateren
dc.subjectOrganic ligandsen
dc.subjectGE Environmental Sciencesen
dc.subjectSDG 14 - Life Below Wateren
dc.titleHydrothermal vents and organic ligands sustained the Precambrian copper budgeten
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Earth & Environmental Sciencesen
dc.contributor.institutionUniversity of St Andrews. St Andrews Centre for Exoplanet Scienceen
dc.description.statusPeer revieweden

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