Isotopes as Tracers of Elements Across the Geosphere–Biosphere Interface

Kyser, Kurt

doi:10.1002/9783527650484.ch12

Cited by 5 publications

(4 citation statements)

References 70 publications

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“…23 Elements influenced by radiogenic processes (both as parent or daughter) are marked in Figure 1 ("RAD"). Cosmogenic processes in the atmosphere produce short-lived nuclides of some elements ("COS" in Figure 1) which may be used to study earth surface processes 24 (e.g., 10 Be, 26 Al) and for dating purposes (e.g., 14 C). Some radioactive metal isotopes are produced by natural (e.g., 210 Pb 25 ) and anthropogenic nuclear processes (e.g., 137 Cs).…”

Section: ■ Introductionmentioning

confidence: 99%

“…Another milestone was the publication of the Handbook of Environmental Isotope Geochemistry edited by Baskaran in 2012, containing chapters focusing on novel stable isotope systems (Li, Si, Ca, Cd, Cr, Se, Hg, Tl) and an overview chapter by Bullen summarizing the state of research and outlining potential applications for transition and post-transition metal isotopes in environmental studies. Additional recent reviews present applications of metal stable isotopes in weathering and hydrology and other environmental systems. − …”

Section: Introductionmentioning

confidence: 99%

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Metal Stable Isotope Signatures as Tracers in Environmental Geochemistry

Wiederhold

2015

Environ. Sci. Technol.

382

238

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The biogeochemical cycling of metals in natural systems is often accompanied by stable isotope fractionation which can now be measured due to recent analytical advances. In consequence, a new research field has emerged over the last two decades, complementing the traditional stable isotope systems (H, C, O, N, S) with many more elements across the periodic table (Li, B, Mg, Si, Cl, Ca, Ti, V, Cr, Fe, Ni, Cu, Zn, Ge, Se, Br, Sr, Mo, Ag, Cd, Sn, Sb, Te, Ba, W, Pt, Hg, Tl, U) which are being explored and potentially applicable as novel geochemical tracers. This review presents the application of metal stable isotopes as source and process tracers in environmental studies, in particular by using mixing and Rayleigh model approaches. The most important concepts of mass-dependent and mass-independent metal stable isotope fractionation are introduced, and the extent of natural isotopic variations for different elements is compared. A particular focus lies on a discussion of processes (redox transformations, complexation, sorption, precipitation, dissolution, evaporation, diffusion, biological cycling) which are able to induce metal stable isotope fractionation in environmental systems. Additionally, the usefulness and limitations of metal stable isotope signatures as tracers in environmental geochemistry are discussed and future perspectives presented.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Metal Stable Isotope Signatures as Tracers in Environmental Geochemistry

Wiederhold

2015

Environ. Sci. Technol.

382

238

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“…Although there are differences in the concentrations of some metals between both species, the relative spatial distribution of many elements in both is similar when there is overlap, particularly Pb isotopes. Thus, Pb isotopes, which do not record any isotopic fractionation in natural systems (Kyser, 2012;Shotyk and Le Roux, 2005;Weiss et al, 1999), should be similarly recorded in the tree rings of the two species.…”

Section: Discussionmentioning

confidence: 97%

Using Pb isotopes in surface media to distinguish anthropogenic sources from undercover uranium sources

Kyser

Lahusen

Drever³

et al. 2015

Comptes Rendus. Géoscience

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“…The content in allochthonous benthonic foraminifera should therefore be lower in Sopelana and Oyambre. In fact, the calcareous components of the three successions mainly consist of autochthonous foraminifera and calcareous nannofossils, both of which are originally composed of relatively stable low‐magnesium calcite (Marshall, ; Kyser, ). It is therefore unlikely that differential diagenesis of the hemipelagic limestone–marl alternations occurred in response to dissolution of aragonite or variations in the supply of platform‐derived fine‐grained sediment (Munnecke & Westphal, ).…”

Section: Discussionmentioning

confidence: 99%

Contrasting environmental effects of astronomically driven climate change on three Eocene hemipelagic successions from the Basque–Cantabrian Basin

et al. 2017

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Several processes can contribute to the formation of hemipelagic limestone–marl alternations as a consequence of astronomically driven climate change. The aim of this study was to decipher which environmental factors governed the formation of three Eocene hemipelagic successions of the Basque–Cantabrian Basin using a comprehensive set of physical and bulk carbonate geochemical data (bed thickness, mineralogy, %CaCO3, δ13C and δ18O). The results show that the significance of several environmental processes varied depending on the palaeogeographic setting and eccentricity‐modulated precessional seasonality. In the Sopelana starved deep‐sea basin, limestones were formed as a consequence of high pelagic carbonate productivity during periods of warm seawater and sluggish circulation, which corresponded with periods of low seasonality (summers at aphelion); conversely, marls accumulated when pelagic carbonate productivity decreased during periods with cooler waters and more vigorous circulation, which occurred when seasonality was higher (summers at perihelion). In the Gorrondatxe submarine fan fringe, marls accumulated when high seasonality produced significant continental rainfall and run‐off, causing the dilution of pelagic carbonate sedimentation with terrigenous supplies. In the Oyambre upper slope, marls also accumulated when seasonality was high, as pelagic carbonate productivity decreased due to both the expansion of low‐salinity waters on the ocean surface and the increase in continentally derived nutrients, which caused detrimental seawater conditions for calcareous plankton. Both in Gorrondatxe and Oyambre, limestones accumulated when boreal summer at aphelion caused low seasonality, which allowed relatively stable conditions to prevail. At minimum eccentricity, when precession‐driven seasonality contrast diminished, changes in pelagic carbonate productivity were significant in the three sections. On the contrary, at maximum eccentricity, when seasonality peaked due to summers occurring at perihelion, the effects of other environmental processes, such as continental and oceanic currents, became influential. However, the influence of these processes minimized when summertime coincided with aphelion at maximum eccentricity and seasonality was weakest.

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Isotopes as Tracers of Elements Across the Geosphere–Biosphere Interface

Cited by 5 publications

References 70 publications

Metal Stable Isotope Signatures as Tracers in Environmental Geochemistry

Metal Stable Isotope Signatures as Tracers in Environmental Geochemistry

Using Pb isotopes in surface media to distinguish anthropogenic sources from undercover uranium sources

Contrasting environmental effects of astronomically driven climate change on three Eocene hemipelagic successions from the Basque–Cantabrian Basin

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