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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 ,
A. Kasioptas ,
C. V. Putnis  and
A. Putnis
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
*
*E-mail: [email protected]
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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.

Keywords

aragonitecalcitereplacementinterface
Type
Research Article
Information
Mineralogical Magazine , Volume 72 , Issue 1 , February 2008 , pp. 111 - 114
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

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