Localized shear and distributed strain accumulation as competing shear accommodation mechanisms in crustal shear zones: constraining their dictating factors

Chatterjee, Pramit; Roy, Arnab; Mandal, Nibir

doi:https://doi.org/10.5194/se-15-1281-2024

Articles | Volume 15, issue 10

https://doi.org/10.5194/se-15-1281-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/se-15-1281-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 15, issue 10

Research article

|

29 Oct 2024

Research article |

| 29 Oct 2024

Localized shear and distributed strain accumulation as competing shear accommodation mechanisms in crustal shear zones: constraining their dictating factors

Pramit Chatterjee, Arnab Roy, and Nibir Mandal

Supplement

https://doi.org/10.5194/se-15-1281-2024-supplement

Data sets

Localized shear versus distributed strain accumulation as shear-accommodation mechanisms in ductile shear zones: Constraining their dictating factors P. Chatterjee et al. https://doi.org/10.6084/m9.figshare.25563030.v2

Model code and software

Underworld2: Python Geodynamics Modelling for Desktop, HPC and Cloud R. Beucher et al. https://doi.org/10.5281/zenodo.6820562

Short summary

Understanding strain accumulation processes in shear zones is essential for explaining failure mechanisms at great crustal depths. This study explores the rheological and kinematic factors determining the varying modes of shear accommodation in natural shear zones. Numerical simulations suggest that an interplay of parameters – initial viscosity, bulk shear rate, and internal cohesion – governs the dominance of one accommodation mechanism over another.