An experimental study of the aqueous solubility and speciation of Y(III) fluoride at temperatures up to 250°C

Loges, Anselm; Migdisov, Artas; Wagner, Thomas; Williams‐Jones, Anthony E.; Markl, Gregor

doi:10.1016/j.gca.2013.07.031

Cited by 65 publications

(38 citation statements)

References 57 publications

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“…As the theoretical studies of Wood (1990a) and Haas et al (1995) did not Table 3 The HKF equation of state parameters for aqueous REE chloride species (Migdisov et al, 2009 consider Y fluoride species, this is also the only source of data on Y fluoride complexation. Loges et al (2013) found that yttrium undergoes a higher degree of fluorination than the lanthanoids, which leads to a predominance of YF 2 + over YF 2+ over the range of temperatures investigated (100°to 250°C) for total concentrations of fluoride from 1 to 330 mmol/l (similar to those employed by Migdisov et al (2009)). Table 5 lists the HKF parameters derived by Loges et al (2013) for YF 2 + .…”

Section: Thermodynamic Stability Of Aqueous Ree Fluoride Complexesmentioning

confidence: 55%

“…Loges et al (2013) found that yttrium undergoes a higher degree of fluorination than the lanthanoids, which leads to a predominance of YF 2 + over YF 2+ over the range of temperatures investigated (100°to 250°C) for total concentrations of fluoride from 1 to 330 mmol/l (similar to those employed by Migdisov et al (2009)). Table 5 lists the HKF parameters derived by Loges et al (2013) for YF 2 + .…”

Section: Thermodynamic Stability Of Aqueous Ree Fluoride Complexesmentioning

confidence: 55%

“…The only study to have investigated the behavior of yttrium experimentally in F-bearing aqueous fluids is that of Loges et al (2013). As the theoretical studies of Wood (1990a) and Haas et al (1995) did not Table 3 The HKF equation of state parameters for aqueous REE chloride species (Migdisov et al, 2009 consider Y fluoride species, this is also the only source of data on Y fluoride complexation.…”

Section: Thermodynamic Stability Of Aqueous Ree Fluoride Complexesmentioning

confidence: 99%

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Hydrothermal transport, deposition, and fractionation of the REE: Experimental data and thermodynamic calculations

et al. 2016

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For many years, our understanding of the behavior of the REE in hydrothermal systems was based on semiempirical estimates involving extrapolation of thermodynamic data obtained at 25°C (Haas et al., 1995;Wood, 1990a). Since then, a substantial body of experimental data has accumulated on the stability of aqueous complexes of the REE. These data have shown that some of the predictions of Haas et al. (1995) are accurate, but others may be in error by several orders of magnitude. However, application of the data in modeling hydrothermal transport and deposition of the REE has been severely hampered by the lack of data on the thermodynamic properties of even the most common REE minerals. The discrepancies between the predictions of Haas et al. (1995) and experimental determinations of the thermodynamic properties of aqueous REE species, together with the paucity of data on the stability of REE minerals, raise serious questions about the reliability of some models that have been proposed for the hydrothermal mobility of these critical metals. In this contribution, we review a body of high-temperature experimental data collected over the past 15 years on the stability of REE aqueous species and minerals. Using this new thermodynamic dataset, we re-evaluate the mechanisms responsible for hydrothermal transport and deposition of the REE. We also discuss the mechanisms that can result in REE fractionation during their hydrothermal transport and deposition. Our calculations suggest that in hydrothermal solutions, the main REE transporting ligands are chloride and sulfate, whereas fluoride, carbonate, and phosphate likely play an important role as depositional ligands. In addition to crystallographic fractionation, which is based on the differing affinity of mineral structures for the REE, our models suggest that the REE can be fractionated hydrothermally due to the differences in the stability of the LREE and HREE as aqueous chloride complexes.

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Section: Thermodynamic Stability Of Aqueous Ree Fluoride Complexesmentioning

confidence: 55%

Section: Thermodynamic Stability Of Aqueous Ree Fluoride Complexesmentioning

confidence: 55%

Section: Thermodynamic Stability Of Aqueous Ree Fluoride Complexesmentioning

confidence: 99%

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Hydrothermal transport, deposition, and fractionation of the REE: Experimental data and thermodynamic calculations

et al. 2016

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“…The nature of the ligands involved in this fluid, however, is less clear and there is little direct evidence to help with this. In fluids capable of transporting the REE, fluoride complexation has been shown to preferentially transport Y over the HREE (Bau and Dulski 1995;Loges et al 2013), andBühn (2008) suggested that the negative Y anomaly in carbonatites was evidence for fluid transport of Y and the HREE away from carbonatites. However, the F-poor nature of most of the samples at Kangankunde suggests a diminished role for REE-fluoride complexes.…”

Section: Source Of Ree Mineralising Fluid(s) and Nature Of The Mineramentioning

confidence: 99%

Deducing the source and composition of rare earth mineralising fluids in carbonatites: insights from isotopic (C, O, 87Sr/86Sr) data from Kangankunde, Malawi

Broom-Fendley

Wall

Spiro

et al. 2017

Contrib Mineral Petrol

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“…9) of all vein and breccia samples reveal a seawater (marine) signature characterised by distinct negative (oxidising) Ce and positive Y anomalies together with elevated (HREE) concentrations (Bau et al 1997), similar to the host-rock limestone (Uysal et al 2011 and Dulski 1996). This is similar to the fractionation between Y and Ho within fluid-rich systems that involve large degrees of aqueous components (Loges et al 2013). …”

Section: Source and Evolution Of Co 2 -Bearing Fluidsmentioning

confidence: 54%

U-series geochronology and geochemistry of vein and cave carbonate deposits in Turkey: the relationship between late Quaternary tectonic and climatic events

Ünal-İmer¹

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This study is based on the use of vein calcites and speleothems to improve our understanding of late Quaternary tectonic activity and climatic variability in SW Turkey, and to investigate their effects on CO 2 degassing events. To facilitate this, multi-generation carbonate veins and breccia within active faulting zones in Marmaris (Kumlubük and Amos; SW Turkey) and three stalagmites from the Dim Cave (SW Turkey) were studied through thorough petrographical, geochronological (Useries dating), and geochemical (O-C-Sr isotope ratio and trace element concentration) analyses.The findings are presented as a series of four papers.The tectonic study is based on a 150-kyr long precisely-dated (U-series) record of 160 calcite vein/breccia samples from an extensional zone in SW Turkey. The age distribution of the carbonates is commensurate with periods of low to transitional summer insolation. Net moisture balance was positive during the last glacial period, which primarily reflected reduced evapotranspiration rather than increased precipitation. Host limestone sourced-CO 2 accumulation at depth was enhanced by reduced infiltration of meteoric water from shallow depth; facilitating CO 2 build up in the rupture zones and fault failures. This resulted in substantial CO 2 degassing and carbonates (veins and breccias) formation near and at the surface. Finally multi-proxy records of stable/radiogenic isotope (O, C, Sr), trace element/Ca (Mg/Ca,

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An experimental study of the aqueous solubility and speciation of Y(III) fluoride at temperatures up to 250°C

Cited by 65 publications

References 57 publications

Hydrothermal transport, deposition, and fractionation of the REE: Experimental data and thermodynamic calculations

Hydrothermal transport, deposition, and fractionation of the REE: Experimental data and thermodynamic calculations

Deducing the source and composition of rare earth mineralising fluids in carbonatites: insights from isotopic (C, O, 87Sr/86Sr) data from Kangankunde, Malawi

U-series geochronology and geochemistry of vein and cave carbonate deposits in Turkey: the relationship between late Quaternary tectonic and climatic events

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