Mass fractionation processes of transition metal isotopes

Zhu, Xuwei; Guo, Y.; Williams, R. J. P.; O’Nions, R.K.; Matthews, Alan; Belshaw, N.S.; Canters, G.W.; Waal, Ellen C. de; Weser, Ulrich; Burgess, Barbara K.; Salvato, Benedetto

doi:10.1016/s0012-821x(02)00615-5

Cited by 413 publications

(327 citation statements)

References 41 publications

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“…Experimental and empirical data support the magnitude and direction of copper isotope fractionation during the redox reactions [33,38,39].…”

Section: The Behavior Of Copper Isotopes and Predicted Differences Fomentioning

confidence: 72%

“…While many reactions can result in a shift in copper isotope values, redox reactions have been documented to produce the most substantial changes; redox reactions that result in oxidized copper favor the 65 Cu isotope, whereas reactions that result in reduced copper favor the 63 Cu isotope due to stronger bonding environments for each isotope [33,[37][38][39]. Experimental and empirical data support the magnitude and direction of copper isotope fractionation during the redox reactions [33,38,39].…”

Section: The Behavior Of Copper Isotopes and Predicted Differences Fomentioning

confidence: 94%

“…Solutions that leach copper during oxidation from the copper sulfide mineral become enriched in the 65 Cu isotope due to a stronger bonding environment [33,38,39]. Although the degree of enrichment (fractionation factor) is different for a variety of copper sulfides (chalcopyrite, chalcocite, bornite, and enargite), in each case, the reactions produce cupric copper (Cu +2 ) in solution which always has greater 65 Cu‰ than the starting mineral.…”

Section: The Behavior Of Copper Isotopes and Predicted Differences Fomentioning

confidence: 99%

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Origins of Chalcocite Defined by Copper Isotope Values

et al. 2018

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The origin of chalcocite is explored through a comparison of the copper isotope values of this mineral from supergene enrichment, sedimentary copper/red bed, and high-temperature hypogene mineralization around the world. Data from the literature and the data presented here ( = 361) reveal that chalcocite from high-temperature mineralization has the tightest cluster of values of 65 Cu = 0 ± 0.6 in comparison to sedimentary copper/red bed 65 Cu = −0.9 ± 1.0 and supergene enrichment 65 Cu = +1.9 ± 1.8. Although the errors of the means overlap, large portions of the data lie in different values, allowing for distinguishing ranges for 65 Cu of <−1‰ for sedimentary copper/red bed, between −1 and +1 for high-temperature hypogene, and >+1 for supergene enrichment chalcocite. The copper isotope values of sedimentary copper/red bed and supergene enrichment chalcocite are caused by redox reactions associated with the dissolution and transport of copper, whereas the tighter range of copper isotope values for hypogene minerals is associated with processes active with equilibrium conditions.

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“…Experimental and empirical data support the magnitude and direction of copper isotope fractionation during the redox reactions [33,38,39].…”

Section: The Behavior Of Copper Isotopes and Predicted Differences Fomentioning

confidence: 72%

Section: The Behavior Of Copper Isotopes and Predicted Differences Fomentioning

confidence: 94%

Section: The Behavior Of Copper Isotopes and Predicted Differences Fomentioning

confidence: 99%

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Origins of Chalcocite Defined by Copper Isotope Values

et al. 2018

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“…The range . The Fe isotope composition variations among mid-ocean-ridge hydrothermal fluids may be related primarily to water-rock reactions [17], bedrock properties [18], hydrothermal sulfide deposition [19], chemical compositions of fluids [20], phase separation [6], sediments, and microbiologic effects [15,64]. [17].…”

Section: Fe Isotopic Compositions Of Modern Seafloor Hydrothermalmentioning

confidence: 99%

Fe Isotopic Compositions of Modern Seafloor Hydrothermal Systems and Their Influence Factors

Wang

2017

Journal of Chemistry

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Based on previous research on the Fe isotope compositions of various components and systems of the Earth, this study focused on the Fe isotope compositions of hydrothermal systems, including the Fe isotope variations in chalcopyrite, pyrite, and sphalerite, and their possible controlling factors. The main findings are as follows: (1) 56 Fe values of pyrite/marcasite display a larger range than those of chalcopyrite. This pattern is directly related to equilibrium fractionation or kinetic fractionation of Fe isotopes during the deposition of sulfides. To better understand the Fe isotope compositions of modern seafloor hydrothermal systems, the geochemical behavior and fractionation mechanisms of Fe isotopes require further in situ study.

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“…Ces dernières années, l'existence de fractionnements significatifs des isotopes du Fe (δ 56 Fe) a été mis en évidence (Zhu et al, 2002 ;Anbar, 2004) dans les systèmes naturels, et la caractérisation des mécanismes de fractionnement fait l'objet de nombreux travaux scientifiques en cours. Ces études documentent la variabilité naturelle du δ 56 Fe et des fractionnements isotopiques associés à des processus chimiques, géochimiques et biologiques.…”

Section: Ferunclassified

Traceurs isotopiques : sources et processus

Fouillac¹,

Cocherie²,

Girard³

et al. 2005

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Des évolutions technologiques majeures ont eu lieu ces dernières années dans le domaine de la mesure isotopique. L'objectif de cet article est de montrer le potentiel de ces avancées appliquées aux sciences de la terre et de l'environnement. Il s'agit, d'une part, de la technologie des spectromètres de masse à flux continu, dont la fiabilité est maintenant acquise à des précisions semblables à celles des spectromètres de masse à source gazeuse et double introduction, mais sur des échantillons beaucoup plus petits et avec une productivité largement supérieure. D'autre part, cet article expose le développement des ICP-MS-MC (spectromètre de masse à multicollection et source à plasma induit). Ces instruments permettent de réaliser des mesures isotopiques dont la précision et la justesse rivalisent avec celles obtenues en TIMS (spectromètre de masse à thermoionisation), mais sur une panoplie d'éléments chimiques beaucoup plus large, à des concentrations très basses, et avec une rapidité bien supérieure (Cr, Zr, Mo, Cu, Zn, Fe, Mg, Cd, Li, B, Hf, Se, Pb). Ces avancées permettent un accès plus facile aux techniques isotopiques, en termes de productivité et donc de coût, en termes de taille d'échantillons, et enfin, d'investigation grâce à l'accès à de nouveaux systèmes isotopiques. Ceci favorise la mise en oeuvre d'études basées sur plusieurs traceurs isotopiques dont la complémentarité renforce la puissance. Ces nouvelles perspectives seront exposées au travers d'exemples pris dans le domaine de la géothermie, du stockage de déchets, de la migration de fluides et du transport aérien de matière particulaire en milieu urbain. Abstract -Isotopic Tracers : Sources and Processes -Major technological advances have taken place in the past few years in the field of isotopic measurements. The goal of the present paper is to illustrate the potential unveiled by such advances in their application to geosciences and environmental issues. One significant improvement in analytical performance was brought by continuous flow mass spectrometry (CF-IRMS), a technology which demonstrated its capability to provide isotopic measurements at

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Mass fractionation processes of transition metal isotopes

Cited by 413 publications

References 41 publications

Origins of Chalcocite Defined by Copper Isotope Values

Origins of Chalcocite Defined by Copper Isotope Values

Fe Isotopic Compositions of Modern Seafloor Hydrothermal Systems and Their Influence Factors

Traceurs isotopiques : sources et processus

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