Deformation-resembling microstructure created by fluid-mediated dissolution-precipitation reactions

Liene Spruzeniece*, Sandra Piazolo, Helen E. Maynard-Casely

*Corresponding author for this work

Research output: Contribution to journalArticle

12 Citations (Scopus)
8 Downloads (Pure)

Abstract

Deformation microstructures are widely used for reconstructing tectono-metamorphic events recorded in rocks. In crustal settings deformation is often accompanied and/or succeeded by fluid infiltration and dissolution-precipitation reactions. However, the microstructural consequences of dissolution-precipitation in minerals have not been investigated experimentally. Here we conducted experiments where KBr crystals were reacted with a saturated KCl-H2O fluid. The results show that reaction products, formed in the absence of deformation, inherit the general crystallographic orientation from their parents, but also display a development of new microstructures that are typical in deformed minerals, such as apparent bending of crystal lattices and new subgrain domains, separated by low-angle and, in some cases, high-angle boundaries. Our work suggests that fluid-mediated dissolution-precipitation reactions can lead to a development of potentially misleading microstructures. We propose a set of criteria that may help in distinguishing such microstructures from the ones that are created by crystal-plastic deformation.

Original languageEnglish
Article number14032
Pages (from-to)1-9
Number of pages9
JournalNature Communications
Volume8
DOIs
Publication statusPublished - 27 Jan 2017

Bibliographical note

Copyright the Author(s) 2017. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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