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dc.contributor.authorBennett, William W
dc.contributor.authorCanfield, Donald E
dc.date.accessioned2020-09-10T02:28:58Z
dc.date.available2020-09-10T02:28:58Z
dc.date.issued2020
dc.identifier.issn0012-8252
dc.identifier.doi10.1016/j.earscirev.2020.103175
dc.identifier.urihttp://hdl.handle.net/10072/397281
dc.description.abstractRedox-sensitive trace metals have been used extensively as geochemical proxies to infer the redox-status of marine sediments at the time of their deposition, and by extension, the concentration of oxygen in the overlying water and atmosphere. However, to reliably apply these paleoredox proxies in ancient sediment samples we must calibrate their geochemical behavior in modern sedimentary environments with known redox-status. Here we report a new compilation and analysis of modern trace-metal enrichment data for a range of marine depositional environments, including euxinic basins, continental margin upwelling settings, and normal oxic settings. The enrichments (i.e., concentrations normalized to aluminum content) of vanadium, uranium, molybdenum and rhenium (the VUMoRe database) in the various depositional categories were analyzed using receiver operating characteristic (ROC) curve analysis to systematically identify threshold values that differentiate the various settings. The enrichment of both Mo (> 5 μg g−1/%) and V (> 23 μg g−1/%), but with V not exceeding 46 μg g−1/%, provides strong evidence for a euxinic basin-type depositional environment. Furthermore, the enrichment of V (> 46 μg g−1/%), U (> 5 μg g−1/%) and Mo (> 5 μg g−1/%) is strong evidence for sediments depositing within the anoxic core of perennial OMZ environments, whereas the enrichment of U (> 1 μg g−1/%) coinciding with a low enrichment of V (< 23 μg g−1/%) and Mo (< 5 μg g−1/%) is strong evidence of sediment deposition in the oxic water beneath the core of a perennial OMZ environment. The new method we describe here for determining enrichment thresholds of trace metal-based redox proxies will support the reliable classification of ancient depositional environments and the ongoing development of trace metals as paleoredox proxies.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.relation.ispartofjournalEarth-Science Reviews
dc.relation.ispartofvolume204
dc.subject.fieldofresearchEarth sciences
dc.subject.fieldofresearchcode37
dc.subject.keywordsScience & Technology
dc.subject.keywordsPhysical Sciences
dc.subject.keywordsGeosciences, Multidisciplinary
dc.subject.keywordsGeology
dc.subject.keywordsMarine sediment
dc.titleRedox-sensitive trace metals as paleoredox proxies: A review and analysis of data from modern sediments
dc.typeJournal article
dc.type.descriptionC1 - Articles
dcterms.bibliographicCitationBennett, WW; Canfield, DE, Redox-sensitive trace metals as paleoredox proxies: A review and analysis of data from modern sediments, Earth-Science Reviews, 2020, 204
dcterms.licensehttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.date.updated2020-09-10T00:31:22Z
dc.description.versionAccepted Manuscript (AM)
gro.rights.copyright© 2020 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
gro.hasfulltextFull Text
gro.griffith.authorBennett, Will W.


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