Skip to Main Content
GEOREF RECORD

Investigation of loaded halite-SiO (sub 2) interfaces undergoing dissolution-precipitation processes

Guntram Jordan, Thomas Lohkaemper, Martin Schellewald and Wolfgang W. Schmahl
Investigation of loaded halite-SiO (sub 2) interfaces undergoing dissolution-precipitation processes
European Journal of Mineralogy (June 2005) 17 (3): 399-409

Abstract

The effect of uni-axial stress on the convergence of halite crystals in contact with SiO (sub 2) in dry conditions and in the presence of saturated solution has been investigated by optical interferometry. Adding saturated solutions caused a strong increase in the convergence; simultaneously, Linnik-based phase shift interference microscopy was used to monitor in situ the nano-scale morphology of the loaded surface of the crystal. The measured crystal convergence was found not to be dominated by dissolution within the loaded halite-SiO (sub 2) interface but rather by an increased plasticity of the halite crystal due to the addition of saturated solution. Temporarily reducing the stress reduces the elastic strain energy of the crystal and potential energy of the system as a driving force for dissolution, but increases the potentiality for material transport from the interface into the bulk fluid. Thus mechanisms which cause a remanent excess energy contribute to increased solubility and material flux during periods of reduced stress. Local plastic deformation satisfies this condition. It is predicted that episodic cycling of tectonic stress, pore pressure, or solute activity will significantly enhance deformation rates in rocks.


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 17
Serial Issue: 3
Title: Investigation of loaded halite-SiO (sub 2) interfaces undergoing dissolution-precipitation processes
Affiliation: Ruhr-Universitaet Bochum, Institut fuer Geologie, Mineralogie und Geophysik, Bochum, Federal Republic of Germany
Pages: 399-409
Published: 200506
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 43
Accession Number: 2005-044755
Categories: General mineralogy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 200526
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal