Zinc isotope and transition-element dynamics accompanying hydrozincite biomineralization in the Rio Naracauli, Sardinia, Italy

Wanty, Richard B.; Podda, Francesca; Giudici, Giovanni; Cidu, Rosa; Lattanzi, Pierfranco

doi:10.1016/j.chemgeo.2012.11.010

Cited by 44 publications

(37 citation statements)

References 44 publications

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“…Without the isotopic data, decreasing Pb concentrations downstream of Site 11 could reasonably be interpreted as reflecting the dilution of sediment-born Pb by relatively "clean" sediments from the underlying bedrock. However, the increasing 208 Pb/ 206 Pb ratio suggests that other source(s) of Pb characterized by a higher 208 Pb/ 206 Pb ratio are entering the channel. Shepherd et al [162] argued that this additional Pb was derived from the influx of diffuse anthropogenic sources from tributaries draining an abandoned coalfield.…”

Section: Pb/ 206mentioning

confidence: 99%

“…Chillrud et al [114] used geochemical tracing methods on sediment cores collected upstream of three dams located a total distance of 24 miles apart to construct a history of contaminant loadings to the river. An important component of the analysis was the chemostratigraphic correlation between the sites on the basis of 206 Pb/ 207 Pb ratios (Figure 7). By doing so, they were able to use the age constraints provided by 137 Cs data within the upstream core to precisely date the deposits located downstream.…”

Section: Extrapolating Site Data Using Chemostratigraphic Methodsmentioning

confidence: 99%

“…The isotopic abundances of Pb found within rocks, sediments, soils, etc. are typically reported as ratios (e.g., 206 Pb / Pb) [29]. In contrast, most studies using Pb isotopes as a geochemical tracer have avoided the use of 204 Pb because of its low relative abundance (Table 1), and the difficulty of measuring it at low concentrations.…”

Section: Pb Isotopesmentioning

confidence: 99%

“…Pb has four stable isotopes that are used in environmental forensics, including the daughter products 206 Pb, 207 Pb, and 208 Pb which are derived from the radioactive decay of 238 U, 235 U, and 232 Th, respectively ( Table 1). The fourth isotope, 204 Pb, has no known radiogenic parent.…”

Section: Pb Isotopesmentioning

confidence: 99%

“…The potential use of stable isotopes as a tracer has been recognized since at least the 1960s and is based on the ability to characterize a material on subtle differences in the isotopic abundances of a given element [30]. The isotopes of Pb (specifically 208 Pb, 207 Pb, 206 Pb, and 204 Pb) have been particularly well studied and applied as a fingerprinting tool [29,42,43]. In fact, it has been argued that Pb isotopic fingerprinting is one of the most popular methods available for determining Pb sources throughout the world [44].…”

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confidence: 99%

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Forensic Assessment of Metal Contaminated Rivers in the 21st Century Using Geochemical and Isotopic Tracers

Miller

2013

Minerals

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Documentation of contaminant source and dispersal pathways in riverine environments is essential to mitigate the potentially harmful effects of contaminants on human and ecosystem health, and is required from a legal perspective (particularly where the polluter pays principle is in effect) in assessing site liability. Where multiple natural and/or anthropogenic sources exist, identification of contaminant provenance has proven problematic, and estimated contributions from a specific source are often the subject of judicial debate. The past, current, and future use of geochemical and isotopic tracers in environmental forensic investigations of contaminant provenance, transport, and fate are analyzed herein for sediment-associated trace metals in riverine environments, particularly trace metals derived from mining and refining operations. The utilized methods have evolved significantly over the past four decades. Of primary significance has been the growing integration of geomorphic and stratigraphic techniques with the use of an increasing number of geochemical tracers including stable isotopes. The isotopes of Pb have been particularly well studied, and have been applied to a wide range of environmental media. Advances in analytical chemistry since the early 1990s have allowed for the precise characterization of other non-traditional stable isotopic systems within geological materials. The potential for using these non-traditional isotopes as tracers in river systems has yet to be adequately explored, but a number of these isotopes (e.g., Cd, Cu, Cr, Hg, Sb, and Zn) show considerable promise. Moreover, some of these isotopes (e.g., those of Cu, Cr, and Hg) may provide important insights into biogeochemical cycling processes within aquatic environments. This review suggests that future environmental forensic investigations will be characterized by an interdisciplinary approach that combines the use of multiple geochemical tracers with detailed stratigraphic, geomorphic, and hydrologic data, thereby yielding results that are likely to withstand the scrutiny of judicial review.

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Section: Pb/ 206mentioning

confidence: 99%

Section: Extrapolating Site Data Using Chemostratigraphic Methodsmentioning

confidence: 99%

Section: Pb Isotopesmentioning

confidence: 99%

Section: Pb Isotopesmentioning

confidence: 99%

mentioning

confidence: 99%

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Forensic Assessment of Metal Contaminated Rivers in the 21st Century Using Geochemical and Isotopic Tracers

Miller

2013

Minerals

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The Potential of Zn Isotopes in the Science and Exploration of Ore Deposits

Wilkinson

2023

Mineral Resource Reviews

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Since the turn of the Century, the growth in development and application of zinc isotopes to multiple fields in terrestrial and planetary sciences has been exponential. The potential for the application of zinc isotope systematics to ore deposit formation processes was obvious from the outset, given that they represent the most significant concentrations of zinc on Earth and because this approach allowed, for the first time, direct assessment of zinc metal origins and transport. This contribution presents a brief summary of the notation and analytical procedures for analysis of zinc isotopes and summarizes the terrestrial data reported to date. These results show that the variation in zinc isotope composition in rocks and ore systems is in fact rather small (< 2 ‰), linked, at least in part, to the single oxidation state in which zinc occurs in nature. Based on an assessment of the literature, the principal mechanisms for causing isotopic fractionation are all relatively low temperature processes: (i) biogenic; (ii) supergene dissolution-reprecipitation; (iii) adsorption–desorption reactions; and (iv) hydrothermal precipitation. High temperature igneous processes do not appear to produce significant isotopic variations. In ore deposit studies, it currently appears unlikely that zinc isotopes can be used to constrain potential metal sources, apart from zinc derived from carbonate host rocks which tends to be isotopically heavy. However, there are a number of systems in which systematic variation in δ66Zn of sulfides suggests that Rayleigh-type fractionation during ore mineral precipitation occurs, opening up the possibility of using zinc isotopes to trace flow paths and vector in towards mineralized centers. Modeling of such hydrothermal processes is currently hindered by a paucity of experimentally-determined fractionation factors, but as such work is done, our ability to better understand and utilize zinc isotopic zonation patterns for the purposes of mineral exploration will be progressively enhanced.

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Biominerals

Ehrlich¹

2019

Marine Biological Materials of Invertebrate Origin

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Zinc isotope and transition-element dynamics accompanying hydrozincite biomineralization in the Rio Naracauli, Sardinia, Italy

Cited by 44 publications

References 44 publications

Forensic Assessment of Metal Contaminated Rivers in the 21st Century Using Geochemical and Isotopic Tracers

Forensic Assessment of Metal Contaminated Rivers in the 21st Century Using Geochemical and Isotopic Tracers

The Potential of Zn Isotopes in the Science and Exploration of Ore Deposits

Biominerals

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