Rapid development of negative Ce anomalies in surface waters and contrasting REE patterns in groundwaters associated with Zn–Pb massive sulphide deposits

Leybourne, Matthew I.; Goodfellow, Wayne D.; Boyle, Dan R.; Hall, Gwendy M

doi:10.1016/s0883-2927(99)00096-7

Cited by 187 publications

(94 citation statements)

References 39 publications

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“…Groundwater and river/streamwater associated with marinederived carbonate-rich catchments often exhibit LREE depleted patterns that resemble seawater (e.g. Elderfield et al 1990;Smedley 1991;Johannesson & Lyons 1994;Sholkovitz 1995;Johannesson & Hendry 2000;Leybourne et al 2000;Négrel et al 2000). In this study, REE+Y in immature streams from small drainage catchments in Co.…”

Section: Ree+y In the Hydrological Systemmentioning

confidence: 75%

87Sr/86Sr and trace element mapping of geosphere-hydrosphere-biosphere interactions: A case study in Ireland

Ryan

Snoeck

Crowley

et al. 2018

Applied Geochemistry

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Section: Ree+y In the Hydrological Systemmentioning

confidence: 75%

87Sr/86Sr and trace element mapping of geosphere-hydrosphere-biosphere interactions: A case study in Ireland

Ryan

Snoeck

Crowley

et al. 2018

Applied Geochemistry

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“…Furthermore, REEs are considered chemical analogues of the actinides (e.g., Am 3+ , Cm 3+ , Cf 3+ ) because of their identical change and similar ionic radii (6,13,14). Since it is typical for REEs to behave coherently, departure from the expected patterns, i.e., fractionations among the REEs, can provide critical information for understanding the types of processes operating within a system (15). Because of the sensitivity to pH, redox conditions, adsorption/desorption, and precipitation/dissolution reactions for the changes of REE patterns, the property of REEs as tracers is quite useful in hydrogeochemical studies (14,15).…”

Section: Introductionmentioning

confidence: 99%

Fractionation Mechanisms of Rare Earth Elements (REEs) in Hydroponic Wheat: An Application for Metal Accumulation by Plants

Ding

Liang

Zhang

et al. 2006

Environ. Sci. Technol.

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Fractionations of rare earth elements (REEs) in wheat (Triticum aestivum L.) were observed through application of exogenous mixed REEs under hydroponic conditions. Middle REE (MREE), light REE (LREE), and heavy REE (HREE) enrichments were found in roots, stems, and leaves, respectively, accompanied by the tetrad effect (an effect that can cause a split of REE patterns into four consecutive segments) in these organs. Investigations into REE speciation in roots and in the xylem sap with X-ray absorption spectroscopy (XAS) and nanometer-sized TiO 2 adsorption techniques, associated with other controlled experiments, demonstrated that REE fractionations in wheat were caused by the combined effects of chemical precipitation, cell wall absorption, and solution complexation by organic ligands in the xylem vessels. REE fractionations in wheat, which were derived from the small differences of chemical properties across REE series, may reflect a sensitive internal chemical environment that influences plant accumulation for REEs and their analogues actinide radionuclides.

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“…The authors also demonstrated that more than 90% of the leached REE were presented in the colloidal phase [42]. In addition, other authors showed that REE fractionation is promoted by an increase in pH [24,43,44]. Edahbi et al showed, using thermodynamic equilibrium calculations on the humidity cell leachate data, that REE concentrations decreased significantly (from 10 −8 to 10 −16 mg/L) when pH values increase from 2.6 to 10 [45].…”

Section: Geochemical Behaviormentioning

confidence: 99%

Rare Earth Elements (La, Ce, Pr, Nd, and Sm) from a Carbonatite Deposit: Mineralogical Characterization and Geochemical Behavior

et al. 2018

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Geochemical characterization including mineralogical measurements and kinetic testing was completed on samples from the Montviel carbonatite deposit, located in Quebec (Canada). Three main lithological units representing both waste and ore grades were sampled from drill core. A rare earth element (REE) concentrate was produced through a combination of gravity and magnetic separation. All samples were characterized using different mineralogical techniques (i.e., quantitative evaluation of minerals by scanning electron microscopy (QEMSCAN), X-ray diffraction (XRD), and scanning electron microscopy with X-ray microanalysis (SEM-EDS)) in order to quantify modal mineralogy, liberation, REE deportment and composition of REE-bearing phases. The REE concentrate was then submitted for kinetic testing (weathering cell) in order to investigate the REE leaching potential. The mineralogical results indicate that: (i) the main REE-bearing minerals in all samples are burbankite, kukharenkoite-Ce, monazite, and apatite; (ii) the samples are dominated by REE-free carbonates (i.e., calcite, ankerite, and siderite); and (iii) LREE is more abundant than HREE. Grades of REE minerals, sulfides and oxides are richer in the concentrate than in the host lithologies. The geochemical test results show that low concentrations of light REE are leached under kinetic testing conditions (8.8-139.6 µg/L total light REE). These results are explained by a low reactivity of the REE-bearing carbonates in the kinetic testing conditions, low amounts of REE in solids, and by precipitation of secondary REE minerals.

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Rapid development of negative Ce anomalies in surface waters and contrasting REE patterns in groundwaters associated with Zn–Pb massive sulphide deposits

Cited by 187 publications

References 39 publications

87Sr/86Sr and trace element mapping of geosphere-hydrosphere-biosphere interactions: A case study in Ireland

87Sr/86Sr and trace element mapping of geosphere-hydrosphere-biosphere interactions: A case study in Ireland

Fractionation Mechanisms of Rare Earth Elements (REEs) in Hydroponic Wheat: An Application for Metal Accumulation by Plants

Rare Earth Elements (La, Ce, Pr, Nd, and Sm) from a Carbonatite Deposit: Mineralogical Characterization and Geochemical Behavior

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