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The effect of fluid composition on the mechanism of the aragonite to calcite transition

Published online by Cambridge University Press:  05 July 2018

C. Perdikouri*
Affiliation:
Institute of Mineralogy, University of Muenster, Corrensstrasse 24, D-48149, Germany
A. Kasioptas
Affiliation:
Institute of Mineralogy, University of Muenster, Corrensstrasse 24, D-48149, Germany
C. V. Putnis
Affiliation:
Institute of Mineralogy, University of Muenster, Corrensstrasse 24, D-48149, Germany
A. Putnis
Affiliation:
Institute of Mineralogy, University of Muenster, Corrensstrasse 24, D-48149, Germany

Abstract

Experiments were performed to investigate the transformation of natural aragonite crystals to calcite by reaction with aqueous solutions of calcium carbonate at hydrothermal conditions for different periods of time. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy and Laser ablation inductively coupled mass spectrometry (LA-ICP-MS) were used to characterize the reaction product. The results indicate that the replacement of aragonite by calcite follows an interface-coupled dissolution-precipitation mechanism.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

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