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Team TFS
Team TFS
1) Onderzoek & Beleving, Bussum, The Netherlands; 2) Centro de Petrologia e Geoquímica, Instituto Superior Técnico, University of Lisbon, Lisbon, Portugal, 3) Institut de Physique du Globe de Paris, Equipe Géochimie Isotopes Stables, Sorbonne Paris Cité, UMR 7154 CNRS, F-75238 Paris, France, 4) Institut de Physique du Globe de Paris, Observatoire Volcanologique et Sismologique de Guadeloupe, UMS 3454 CNRS, Le Houëlmont, 97113 Gourbeyre Guadeloupe, France
Chemical Geology (2016), V433, pp46–56, doi:10.1016/j.chemgeo.2016.04.009
Experimental determination of stable chlorine and bromine isotope fractionation during precipitation of salt from a saturated solution
H.G.M. Eggenkamp (1,2,3), M. Bonifacie (3,4), M. Ader (3) and P Agrinier (3)
In order to better understand the chlorine and bromine stable isotope fractionation that occurs when chloride and bromide salts precipitate from their saturated solutions, we determined experimentally the equilibrium fractionation factors between precipitating pure salt minerals and their coexisting saturated brine at 22 °C. Fractionation factors (expressed as 103lnα(37Cl/35Cl)salt-brine and 103lnα81Br/79Brsalt-brine) obtained for 11 chloride and 7 bromide salts of geological and industrial interest show a relatively largerange of variation (from − 0.31 to + 0.41), with the salt that precipitates having either a lower or a higher isotope ratio than the brine from which they precipitate. A negative fractionation factor indicates that the brine has a larger isotope ratio than the precipitate, a positive factor that the precipitate has a larger isotope ratio.In these measurements the uncertainty is defined as the 1σ standard deviation of replicate determinations.
  • IRMS
  • Cl and Br Isotopes
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