Bioavailability of zinc in marine systems through time

Scott, Clint; Planavsky, Noah J.; Dupont, Chris L.; Kendall, Brian; Gill, Benjamin C.; Robbins, Leslie J.; Husband, Kathryn F.; Arnold, Gail Lee; Wing, Boswell A.; Poulton, Simon W.; Bekker, Andrey; Anbar, Ariel D.; Konhauser, Kurt O.; Lyons, Timothy W.

doi:10.1038/ngeo1679

Cited by 93 publications

(67 citation statements)

References 27 publications

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“…Indeed, the Re concentration and burial flux of Unit I sediments in the Black Sea are generally lower than those of the Cariaco Basin and other relatively open-ocean anoxic settings (Table 2; keeping in mind that sedimentation rate and organic carbon flux also locally influence Re concentrations in organic-rich sediments). A similar relationship between metal concentrations in bottom waters and organic-rich sediments in anoxic basins has been noted for other redox-sensitive elements (e.g., Mo, U, and Zn; Algeo and Lyons, 2006;Scott et al, 2008Scott et al, , 2013Partin et al, 2013).…”

Section: Anoxic Sinksupporting

confidence: 69%

A model for the oceanic mass balance of rhenium and implications for the extent of Proterozoic ocean anoxia

Sheen

Kendall

Reinhard

et al. 2018

Geochimica et Cosmochimica Acta

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Emerging geochemical evidence suggests that the atmosphere-ocean system underwent a significant decrease in O 2 content following the Great Oxidation Event (GOE), leading to a mid-Proterozoic ocean (ca. 2.0-0.8 Ga) with oxygenated surface waters and predominantly anoxic deep waters. The extent of mid-Proterozoic seafloor anoxia has been recently estimated using mass-balance models based on molybdenum (Mo), uranium (U), and chromium (Cr) enrichments in organic-rich mudrocks (ORM). Here, we use a temporal compilation of concentrations for the redox-sensitive trace metal rhenium (Re) in ORM to provide an independent constraint on the global extent of mid-Proterozoic ocean anoxia and as a tool for more generally exploring how the marine geochemical cycle of Re has changed through time. The compilation reveals that mid-Proterozoic ORM are dominated by low Re concentrations that overall are only mildly higher than those of Archean ORM and significantly lower than many ORM deposited during the ca. 2.22-2.06 Ga Lomagundi Event and during the Phanerozoic Eon. These temporal trends are consistent with a decrease in the oceanic Re inventory in response to an expansion of anoxia after an interval of increased oxygenation during the Lomagundi Event. Mass-balance modeling of the marine Re geochemical cycle indicates that the mid-Proterozoic ORM with low Re enrichments are consistent with extensive seafloor anoxia. Beyond this agreement, these new data bring added value because Re, like the other metals, responds generally to lowoxygen conditions but has its own distinct sensitivity to the varying environmental controls. Thus, we can broaden our capacity to infer nuanced spatiotemporal patterns in ancient redox landscapes. For example, despite the still small number of data, some mid-Proterozoic ORM units have higher Re enrichments that may reflect a larger oceanic Re inventory during transient episodes of ocean oxygenation. An improved understanding of the modern oceanic Re cycle and a higher temporal resolution for the Re compilation will enable further tests of these hypotheses regarding changes in the surficial Re geochemical cycle in response to variations in atmosphere-ocean oxygenation. Nevertheless, the existing Re compilation and model results are in agreement with previous Cr, Mo, and U evidence for pervasively anoxic and ferruginous conditions in mid-Proterozoic oceans.

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Section: Anoxic Sinksupporting

confidence: 69%

A model for the oceanic mass balance of rhenium and implications for the extent of Proterozoic ocean anoxia

Sheen

Kendall

Reinhard

et al. 2018

Geochimica et Cosmochimica Acta

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“…However, the marine Zn reservoir appears to have remained constant with an estimated seawater concentration of ~10 nM . When taken together, the IF and shale records for Zn through time effectively and independently point to near modern levels of marine Zn from the Archean through to the modern Scott et al, 2013). This is in contradiction to previous estimates based on thermodynamic models (e.g., Saito et al, 2003) and the idea that Zn would have been biolimiting to early eukarytoes and delayed their diversification (Dupont et al, 2010).…”

Section: Introductioncontrasting

confidence: 54%

Limited Zn and Ni mobility during simulated iron formation diagenesis

et al. 2015

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“…Although the Cu concentration record presented by Chi Fru et al (2016) for IFs and shales is relatively constant in terms of abundancereminiscent of the Zn record raising the possibility of stabilisation of these trace metals by organic ligand complexation (see Robbins et al, 2013;Scott et al, 2013) . Thus the ca.…”

Section: Iron Formations Primary Productivity and Atmospheric Oxygementioning

confidence: 99%

“…Despite N isotopes having been used to argue for the antiquity of Mo-nitrogenase to a least 3.2 Ga (Stüeken et al, 2015a), prior to the Neoproterozoic rise in oxygen, the bulk marine Mo reservoir is likely to have been depressed owing to limited oxidative weathering, which in turn could have limited nitrogen fixation and overall primary productivity by oxygenic phototrophs in the Proterozoic (Anbar and Knoll, 2002;Scott et al, 2008;Reinhard et al, 2013). What role other biologically-essential nutrients played in ancient primary productivity is a current avenue of research (e.g., Robbins et al, 2013;Scott et al, 2013;Swanner et al, 2014). Overall, the possible suppression of cyanobacterial productivity by nutrient limitation in the Proterozoic is consistent with the current view of Earth's oxygenation history (e.g., Lyons et al, 2014) and with either limited or transient oxygen presence in the surface ocean (e.g., Hardisty et al, 2014Hardisty et al, , 2017.…”

Section: Iron Formations Primary Productivity and Atmospheric Oxygementioning

confidence: 99%

Iron formations: A global record of Neoarchaean to Palaeoproterozoic environmental history

Konhauser

Planavsky

Hardisty

et al. 2017

Earth-Science Reviews

364

257

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Bioavailability of zinc in marine systems through time

Cited by 93 publications

References 27 publications

A model for the oceanic mass balance of rhenium and implications for the extent of Proterozoic ocean anoxia

A model for the oceanic mass balance of rhenium and implications for the extent of Proterozoic ocean anoxia

Limited Zn and Ni mobility during simulated iron formation diagenesis

Iron formations: A global record of Neoarchaean to Palaeoproterozoic environmental history

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