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Articles | Volume 14, issue 9
Articles | Volume 14, issue 9
https://doi.org/10.5194/se-14-985-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-14-985-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 14, issue 9
Research article
 | 
01 Sep 2023
Research article |  | 01 Sep 2023

Rapid hydration and weakening of anhydrite under stress: implications for natural hydration in the Earth's crust and mantle

Johanna Heeb, David Healy, Nicholas E. Timms, and Enrique Gomez-Rivas

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Short summary
Hydration of rocks is a key process in the Earth’s crust and mantle that is accompanied by changes in physical traits and mechanical behaviour of rocks. This study assesses the influence of stress on hydration reaction kinetics and mechanics in experiments on anhydrite. We show that hydration occurs readily under stress and results in localized hydration along fractures and mechanic weakening. New gypsum growth is selective and depends on the stress field and host anhydrite crystal orientation.
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