Sediment–water interactions of thallium under simulated estuarine conditions

Turner, Andrew; Cabon, Amelie; Glegg, Gillian; Fisher, Andrew

doi:10.1016/j.gca.2010.09.004

Cited by 48 publications

(19 citation statements)

References 35 publications

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“…This interpretation is also consistent with the isotope compositions inferred for Late and potentially also seawater Tl adsorbed onto clay minerals (ε 205 Tl ~ -6), though Tl only sorbs weakly onto clay minerals in normal marine conditions (Turner et al, 2010). Based on these arguments, we conclude that sediment pore waters from which pyrite would precipitate most likely display ε 205 Tl > -2.…”

Section: Sources Of Thallium In Neogene Pyritesupporting

confidence: 87%

“…Since the Tl concentration of seawater is only ~10-15 pg/g (Flegal and Patterson, 1985;Nielsen et al, 2006;Rehkämper and Nielsen, 2004) it is unlikely that pyrite acquires much Tl directly from seawater. Instead, it is well known that Tl is strongly adsorbed onto Fe-Mn oxy-hydroxides and also somewhat onto clay minerals (Matthews and Riley, 1970;Shaw, 1952;Turner et al, 2010). These phases are very common in marine sediments and may, during burial and subsequent bacterial reduction of the sediment pore waters, dissociate or desorb some of the adsorbed elements.…”

Section: Sources Of Thallium In Neogene Pyritementioning

confidence: 99%

“…Thallium can take on two different valence states: Tl + and Tl 3+ . The oxidized form is uncommon in natural environments because of the high redox potential, but it is likely that this form of Tl plays a significant part in the observed strong adsorption onto authigenic ferromanganese phases and clay minerals in aqueous environments (Hein et al, 2000;Matthews and Riley, 1970;McGoldrick et al, 1979;Turner et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Thallium isotopes in early diagenetic pyrite – A paleoredox proxy?

Nielsen

Goff

Hesselbo

et al. 2011

Geochimica et Cosmochimica Acta

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-This paper presents the first study of Tl isotopes in early diagenetic pyrite.Measurements from two sections deposited during the Toarcian Ocean Anoxic Event (T-OAE, ~183Ma) are compared with data from Late Neogene (<10Ma) pyrite samples from ODP legs 165 and 167 that were deposited in relatively oxic marine environments. The Tl isotope compositions of Late Neogene pyrites are all significantly heavier than seawater, which most likely indicates that Tl in diagenetic pyrite is partially sourced from ferromanganese oxyhydroxides that are known to display relatively heavy Tl isotope signatures. One of the T-OAE sections from Peniche in Portugal displays pyrite thallium isotope compositions indistinguishable from Late Neogene samples, whereas samples from Yorkshire in the UK are depleted in the heavy isotope of Tl. These lighter compositions are best explained by the lack of ferromanganese precipitation at the sediment-water interface due the sulphidic (euxinic) conditions thought to be prevalent in the Cleveland Basin where the Yorkshire section was deposited. The heavier signatures in the Peniche samples appear to result from an oxic water column that enabled precipitation of ferromanganese oxy-hydroxides at the sediment-water interface.The Tl isotope profile from Yorkshire is also compared with previously published molybdenum isotope ratios determined on the same sedimentary succession. There is a suggestion of an anti-correlation between these two isotope systems, which is consistent with the expected isotope shifts that occur in seawater when marine oxic (ferromanganese minerals) fluxes fluctuate.The results outlined here represent the first evidence that Tl isotopes in early diagenetic pyrite have potential to reveal variations in past ocean oxygenation on a local scale and potentially also for global oceans. However, much more information about Tl isotopes in 3 different marine environments, especially in anoxic/euxinic basins, is needed before Tl isotopes can be confidently utilized as a paleo-redox tracer.4

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Section: Sources Of Thallium In Neogene Pyritesupporting

confidence: 87%

Section: Sources Of Thallium In Neogene Pyritementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thallium isotopes in early diagenetic pyrite – A paleoredox proxy?

Nielsen

Goff

Hesselbo

et al. 2011

Geochimica et Cosmochimica Acta

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“…Therefore, the transfer of dissolved Tl from sediments in water was expected to be easy, and the results matched this expectation. Thallium adsorption to riverine sediment is a rapid process only 12 h (Wang et al, 2013) or 16 h (Turner et al, 2010) equilibration period. In this study, the interrupt time of each sampling was at least 24 h to ensure that the Tl was in a state of dynamic balance in the interface of sediment and overlying water.…”

Section: Thallium In the Overlying Watermentioning

confidence: 99%

Bioturbation/bioirrigation effect on thallium released from reservoir sediment by different organism types

Men

Yang

et al. 2015

Science of The Total Environment

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“…Previous studies have been carried out to infer fluxes through the sediment-water interface and to understand the role of diagenetic reactions, including the release or uptake of the metals within the sediments; they have used conventional techniques including centrifugation, squeezing, sippers and in situ dialysis peepers (Hesslein 1976;Watson and Frickers 1990;AleksanderKwaterczak and Helios-Rybicka 2009;Turner et al 2010). However, these methods only achieve a relatively low spatial resolution (cm scale).…”

Section: Introductionmentioning

confidence: 99%

High-resolution profiles of iron, manganese, cobalt, cadmium, copper and zinc in the pore water of estuarine sediment

Zhang

Guo

Yang

et al. 2012

Int. J. Environ. Sci. Technol.

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The remobilization of iron, manganese, cobalt, cadmium, copper and zinc in the pore water of estuarine sediment cores at Yingkou was assessed using diffusive equilibrium in thin films and diffusive gradients in thin films techniques. A relatively anoxic system (?33.7 to -224.1 mV) in the sediment cores might cause the reductive release of iron, manganese and cobalt into pore water from the estuarine sediment. High-average concentrations of iron (47.85 lg ml -1 ) and manganese (3.81 lg ml -1 ) were observed using diffusive equilibrium in thin films on the sediment core, but the concentration of cobalt (18.02 ng ml -1 ) was relatively low. A strong correlation between iron and cobalt was observed based on the vertical profiles of the metals. Manganese and iron were more readily released from the solid phase to the solution. The peak cobalt, copper and zinc concentrations were observed in the upper layer (2-4 cm) measured using diffusive gradients in thin films. However, the peak iron, manganese and cobalt concentrations were located in the deeper layer (C7 cm). In addition, the concentration profiles measured using diffusive gradients in thin films of cobalt, copper and zinc were independent of the iron, manganese and cobalt distribution with respect to depth.

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Sediment–water interactions of thallium under simulated estuarine conditions

Cited by 48 publications

References 35 publications

Thallium isotopes in early diagenetic pyrite – A paleoredox proxy?

Thallium isotopes in early diagenetic pyrite – A paleoredox proxy?

Bioturbation/bioirrigation effect on thallium released from reservoir sediment by different organism types

High-resolution profiles of iron, manganese, cobalt, cadmium, copper and zinc in the pore water of estuarine sediment

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