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Solid Earth
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Articles | Volume 17, issue 8
Articles | Volume 17, issue 8
https://doi.org/10.5194/se-17-947-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/se-17-947-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 17, issue 8
Research article
 | 
06 Aug 2026
Research article |  | 06 Aug 2026

From strong plates to weak boundaries: strain localization in the lithospheric mantle with low- to high-temperature dislocation creep

Etienne Van Broeck, Fanny Garel, Catherine Thoraval, Diane Arcay, and D. Rhodri Davies

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Short summary
Earth’s solid shell is made of stiff tectonic plates which can break apart to form new weak plate boundaries. We use numerical models of plate extension to investigate how mechanical properties control the concentration of deformation leading to such a boundary as hot mantle rises underneath. We highlight feedbacks, and quantify how and why, under various deformation mechanisms, the plate weakens as temperature and strain rate increase. We compare the model predictions to natural rifting cases.
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