Thermodynamic properties of copper chloride complexes and copper transport in magmatic-hydrothermal solutions

Liu, Weihua; McPhail, Derry

doi:10.1016/j.chemgeo.2005.04.009

Cited by 122 publications

(83 citation statements)

References 64 publications

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“…Figure 11 compares the logK Θ of Cu-Cl and Cu-HS complexes based on different experimental studies (Akinfiev and Zotov, 2001;Brugger et al, 2007;Liu W and McPhail, 2005;Liu W et al, 2001;Mountain and Seward, 1999;Xiao et al, 1998) as a function of temperature, with the predicted logK Θ by MD simulations. Discrepancies of around one logK unit among different experimental studies are common, and indeed thermodynamic integration shows good potential to predict thermodynamic properties under wide range of conditions.…”

Section: Ab Initio MD Simulation Of Cu(i) Complexationmentioning

confidence: 99%

Ab initio molecular dynamics simulation and free energy exploration of copper(I) complexation by chloride and bisulfide in hydrothermal fluids

Mei

Sherman

Liu

et al. 2013

Geochimica et Cosmochimica Acta

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Ab initio molecular dynamics simulation and free energy exploration of copper(I) complexation by chloride and bisulfide in hydrothermal fluids Geochimica et Cosmochimica Acta, 2013; 102:45-64 © 2012 Elsevier Ltd. All rights reserved. NOTICE: this is the author's version of a work that was accepted for publication in Geochimica et Cosmochimica Acta. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Geochimica et Cosmochimica Acta, 2013; 102:45-64 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.Ab initio MD simulation of Cu(I) complexation

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Section: Ab Initio MD Simulation Of Cu(i) Complexationmentioning

confidence: 99%

Ab initio molecular dynamics simulation and free energy exploration of copper(I) complexation by chloride and bisulfide in hydrothermal fluids

Mei

Sherman

Liu

et al. 2013

Geochimica et Cosmochimica Acta

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“…50-200 ppm, is generally used for copper electroplating 17 and 1 to 2610 23 mol dm 23 used in the electronics and electrical industries. 18 A higher chloride ion concentration (0?1-3?0 mol dm 23 ) is used in copper electrowinning; levels up to 9?0 mol dm 23 are used for copper refining in hydrothermal systems 19 and 280 g dm 23 used in the leaching of copper from copper mineral chalcopyrite. 20 In most cases, chloride ion is added as a supplement to other additives to achieve combinatorial effects.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposition of copper from mixed sulphate–chloride acidic electrolytes at a rotating disc electrode

Low

León

Walsh

2014

Transactions of the IMF

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The effect of chloride ion on the deposition of copper from low metal concentrations in aqueous, acid sulphate solutions was investigated. . Linear sweep voltammetry was carried out under well defined flow conditions at a smooth platinum rotating disc electrode. The progressive transition from a single, two-electron reaction for the reduction of Cu(II)RCu(0) to two, single-electron reactions for the reduction sequence: Cu(II)RCu(I)RCu(0) was clearly evident as the chloride ion concentration increased. The charge transfer and mass transport characteristics of these reactions were evaluated. The formal potential for the Cu(II) reduction to Cu(I), the shift in the potential region for complete mass transport controlled reduction of Cu(I) to Cu(0) and the potential for hydrogen evolution at the deposited copper were also studied. A semi-logarithmic relationship between exchange current density and half-wave potential for Cu(II)RCu(I) with chloride ion was achieved when the Cl 2 /Cu(II) ratio in the electrolytes exceeded 2, due to the presence of the Cu(I) dichlorocuprous anion, CuCl { 2 .

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“…The preferential remobilisation of Pt over Pd by postmagmatic hydrothermal fluids can be tentatively explained in terms of the factors affecting the solubility of these metals in the aqueous fluid. In magmatic-hydrothermal environments, between 500 and 300 QC, copper is preferentially dissolved in hypersaline, neutral-weak acidic, and intermediate reduced solutions and mainly transported as CuCl2 - (Liu and McPhail, 2005 and references therein). Major factors controlling chalcopyrite deposition are decrease of temperature, and salinity (i.e., Cl availability), and to a lesser extend, decrease of alogical evidences indicate that cha1copyrite was remobilised by hydrothermal fluids and precipitated again at around 350 QC, these factors would have competed among them in the solubility reactions of copper and therefore, dissolution of cha1copyrite was limited.…”

Section: Role Of Hydrothermal Fl Uidsmentioning

confidence: 99%

Mineralogy and geochemistry of platinum-group elements in the Aguablanca Ni-Cu deposit (SW Spain)

Piña

Gervilla

Menor

et al. 2007

Mineralogy and Petrology

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SummaryThe Aguablanca Ni-Cu-(PGE) magmatic sulphide deposit is associated with a magmatic breccia located in the northern part of the Aguablanca gabbro (SW, Iberia). Three types of ores are present: semi-massive, disseminated, and chalcopyrite-rich veined ore. The principal ore minerals are pyrrhotite, pentlandite and chalcopyrite. A relatively abundant platinum-group mineral (PGM) assem blage is present and includes merenskyite, melonite, michenerite, moncheite and sperrylite. Moreover, concentrations of base and precious metals and micro-PIXE analyses were obtained for the three ore-types. The mineralogy and the mantle normalised chalcophile element profiles strongly suggest that semi-massive ore represents mss crystallisation, whereas the disseminated ore represents an unfrac tionated sulphide liquid and the chalcopyrite-rich veined ore a Cu-rich sulphide liquid. Palladium-bearing minerals occur commonly enclosed within sulphides, indicating a magmatic origin rather than hydrothermal. The occurrences and the composition of these minerals suggest that Pd was initially dissolved in the sul phides and subsequently exsolved at low temperatures to form bismutotellurides.Negative Pt and Au anomalies in the mantle-normalised chalcophile element pro files, a lack of Cu-S correlation and textural observations (such as sperrylite losing its euhedral shape when in contact with altered minerals) suggest partial remobi lisation of Pt, Au and Cu by postmagmatic hydrothermal fluids after the sulphide crystallisation.

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Thermodynamic properties of copper chloride complexes and copper transport in magmatic-hydrothermal solutions

Cited by 122 publications

References 64 publications

Ab initio molecular dynamics simulation and free energy exploration of copper(I) complexation by chloride and bisulfide in hydrothermal fluids

Ab initio molecular dynamics simulation and free energy exploration of copper(I) complexation by chloride and bisulfide in hydrothermal fluids

Electrodeposition of copper from mixed sulphate–chloride acidic electrolytes at a rotating disc electrode

Mineralogy and geochemistry of platinum-group elements in the Aguablanca Ni-Cu deposit (SW Spain)

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