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Experimental mineral-fluid interaction in the Na-Ca-(Sr)-Al-Si system

Pierpaolo Zuddas and Gil Michard
Experimental mineral-fluid interaction in the Na-Ca-(Sr)-Al-Si system
European Journal of Mineralogy (October 1993) 5 (5): 807-818


The transformation of plagioclase to neogenic minerals at 180 degrees C was studied. Synthetic anorthite (An (sub 100) ) and labradorite (An (sub 50) ) were spiked with strontium and reacted with two different aqueous solutions: one near-equilibrium with the secondary minerals, the other far from equilibrium. With initial conditions at near-equilibrium, the first new assemblage formed during labradorite dissolution was quartz-prehnite- kaolinite-low-T albite and, during anorthite dissolution, quartz- prehnite- kaolinite. A later transformation of prehnite right arrow smectite occurred after six months; with initial conditions far from equilibrium, smectite formed after one day. Sr and Ca are released stoichiometrically during plagioclase dissolution and the Sr/Ca partition coefficient between the solution and the combined neogenic phases is 1 at 180 degrees C.

ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 5
Serial Issue: 5
Title: Experimental mineral-fluid interaction in the Na-Ca-(Sr)-Al-Si system
Affiliation: Universite Paris, Laboratoire de Geochimie des Eaux, Paris, France
Pages: 807-818
Published: 199310
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 39
Accession Number: 1993-041691
Categories: Mineralogy of silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 9 tables
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 1993
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