ERC Advanced 882450 – 2020-2025
Micro-scale dependent, time- and space-evolving rheologies: the key for generating strain localization in the Earth
RhEoVOLUTION aims to unravel how the evolution of rock rheology controls strain localization at different scales in the Earth. To do so, we will develop a framework for modeling self-consistently strain localization in rocks deforming by ductile processes. We will design: (1) stochastic descriptions of the evolution of the rheology in time and space and (2) fast (supervised machine-learning) methods to calculate the evolution of its anisotropy, which we will incorporate in geodynamical and ice-flow models.
Chauve, T., Montagnat, M., Dansereau, V. Saramito, P., Fourteau, K., Tommasi, A. (2024) A physically-based formulation for texture evolution during dynamic recrystallization. A case study for ice. Comptes rendus Mécanique, in press. Preprint: https://hal.science/hal-04231338
OPEN PhD POSITION at GEOSCIENCES MONTPELLIER
Modelling plate tectonics: How do processes at different scales interact to create strain localization at the planet scale? The aim of the PhD project is to explore the interactions between processes active at different spatial (and temporal) scales during strain localization and develop coarse-graining techniques to define rheological laws able to produce self-consistently strain localization and, hence, simulate plate tectonics in geodynamical models. The work will build on the results of the entire ERC RhEoVOLUTION team, that is composed by >15 researchers of varied backgrounds (Geology, Glaciology, Solid and Fluid Mechanics, Material Sciences, Applied Mathematics…). Read more
OPEN RESEARCH ENGINEER POSITION at GEOSCIENCES MONTPELLIER
We are recruiting a research engineer to work within the ERC RhEoVOLUTION project team on the development of numerical modelling codes well-adapted to simulate self-consistently ductile (viscoplastic) strain localization arising from time and space-evolving rheologies at different scales in the solid Earth.
23-26 January 2024, Villard-de-Lans (France) and Online.
5th RhEoVOLUTION Meeting
Boissonneau, G., Tommasi, A., Barou, F., Lopez-Sanchez M.A., Montagnat, M. Dynamic recrystallization and mechanical behavior of Mg alloy AZ31: Constraints from tensile tests with in-situ EBSD analysis. Acta materialia, submitted. Preprint at HAL https://hal.science/hal-04388880
Chardelin, M., Tommasi, A., Padron-Navarta, J.A. Progressive strain localization and fluid-focusing in mantle shear zones during rifting: Petrostructural constraints from the Zabargad peridotites, Red Sea. J. Petrology, submitted. Preprint at HAL https://hal.science/hal-04387529
Decoupling between strain localisation and the microstructural record: evidence from in-situ strain measurements in polycrystalline ice.
Evolution of strain field and microstructure in polycrystalline ice using in situ experiments
Dynamic recrystallization by subgrain rotation in olivine revealed by high-spatial resolution electron backscatter diffraction.
The Borborema strike-slip shear zone system (NE Brazil): Large-scale intracontinental strain localization in a heterogeneous plate.