EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Modelling lithosphere dynamics with robust rheological implementations: Towards 3D

Thibault Duretz1, René de Borst2, and Ludovic Räss3
Thibault Duretz et al.
  • 1University of Rennes, Géosciences Rennes, UMR CNRS 6118, France (
  • 2University of Sheffield, Department of Civil and Structural Engineering, Sir Frederick Mappin Building, Mappin Street
  • 3ETH Zurich
Reliable numerical models of lithospheric deformation require robust solution methods. The latter should account for a complex and realistic rheological model and should also provide convergent and reproducible results.
Here we present models of crustal-scale deformation that accurately capture the phenomenon of strain localisation in two-dimensions. The use of viscous regularisation yields convergent numerical results. We will compare linearisation methods (consistent tangent, effective viscosity) and discuss the implementation of rheological models (power-law viscous, hardening/softening laws). We will also present three-dimensional models of crustal-scale strain localisation that benefit from both the above-described methods and the computing power of graphical processing units (GPUs).

How to cite: Duretz, T., de Borst, R., and Räss, L.: Modelling lithosphere dynamics with robust rheological implementations: Towards 3D, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-13742,, 2020


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