EGU2020-9533, updated on 20 Jan 2021
EGU General Assembly 2020
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

The application of chemo-mechanical coupling in the modeling of exsolution lamellae in minerals

Lucie Tajcmanova1, Lyudmila Khakimova2, and Yury Podladchikov3
Lucie Tajcmanova et al.
  • 1Heidelberg University, Institute of Earth Sciences, Heidelberg, Germany (
  • 2Skolkovo Institute of Science and Technology, Moscow, Russia (
  • 3Institute of Earth Science (ISTE), University of Lausanne, Lausanne, Switzerland (

The recent careful theoretical, numerical and experimental investigations of exsolution miscrostructures focus only on chemical aspect of the exsolution process. Interestingly, mechanics, i.e. stress and pressure redistribution around the exsolved lamellae, may play an important role on its evolution. In this contribution, we investigate the coupled, chemo-mechanical, effect around the exsolved lamellae. We apply a classical Cahn-Hilliard-type equation and we add more complexity considering deformation during the exsolution process. We also discuss the general importance of the exsolution process in geomaterials and its effect on rheology. At the time of the exsolution lamellae formation (coherent at initial stage), large stresses are built-up inside the host grain. The reason that we still partially see the microstructure preserved is that the stress variations were maintained during the further evolution. In other words, a strong rheology is needed to preserve such large stresses on geological timescales so that we can now detect by the analytical techniques.

How to cite: Tajcmanova, L., Khakimova, L., and Podladchikov, Y.: The application of chemo-mechanical coupling in the modeling of exsolution lamellae in minerals, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-9533,, 2020

This abstract will not be presented.