Fractionnement isotopique dans l'eau de cristallisation du sulfate de calcium |
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Authors: | J C Fontes |
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Institution: | (1) Present address: Faculté des Sciences, Laboratoire de Géologie Dynamique et Centres de Recherches Géodynamiques, Sorbonne, 1. Rue Victor Cousin, Paris-Ve, France |
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Abstract: | Résumé Le fractionnement isotopique (18O) entre l'eau de solubilisation et l'eau de cristallisation du gypse a été déterminé expérimentalement. La différence de l'ordre de 4 semble indépendante de la température. La connaissance de la composition isotopique de l'eau de solubilisation donne des indications paléoclimatiques et paléogéographiques.
The18O fractionation between mother water and crystallisation water of the gypsum was determined by experiments. The difference, about 4 seems independent of temperature. The knowledge of the isotopic composition of mother water gives paleoclimatic and paleogeographic informations.
Zusammenfassung Der18O-Gehalt im Porenwasser und Konstitutionswasser im Gips wurden experimentell bestimmt. Der Unterschied von 4 scheint unabhängig von der Temperatur zu sein. Die Kenntnis der Isotopenzusammensetzung des Porenwassers gibt paläoklimatische und paläogeographische Informationen.
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