Muriel Gerbault

CRCN IRD

Email : muriel.gerbaultDear bot, you won't get my mail address@and my domain...get.omp.eu

CV / functions

• 2018: HDR (Habilitation à Diriger les Recherches).
• Academic Researcher at IRD (Institut de Recherche pour le Développement, CR)
   - Since 2015: GET, Toulouse, France.
   - 2008-2014: Geoazur, Sophia-Antipolis, France.
   - 2004-2008: Universidad de Chile, Santiago, Chile.
   - 2002-2004: LMTG, Toulouse, France.
• 2001-2002: Post-Doctoral fellowship at Vrije Universiteit, Amsterdamwith ISES program: thermo-mechanical modeling of continental convergence,
• 1999-2001: Post-Doctoral contract with IGNS (Institute of Geological and Nuclear Sciences),>SIGHT project, New Zealand:thermomechanical modeling of the Southern Alps.
• 1999: PhD at the Lab. Geophys. Tectonics, University of Montpellier II, France:Numerical models of localised deformation at the lithospheric scale.

Research

Last babies:

– Poro-elasto-plastic behavior inducedby a slipping fault near a fluid source (Saez Leiva et al., 2023),

– Partially molten crustal domes part II (Louis-Napoleon et al., part II, GJInt, 2024),

– Fani Maoré (Mayotte) interacting magma chambers to explain its deep seismicity (de Sagazan et al., JVGR, 2024).

I mainly use numerical methods to test how geodynamic scenarii can be explained with elasto-visco-plastic rheologies at crustal or lithospheric scales. Sometimes, this requires algorithmic implementation. Always, it requires data of some sort, structural geology, petrology, geophysics. I seek to compare modeled features of deformation to these data. I like to show the importance of a dynamic stress evolution as opposed to standard kinematic or static concepts.

Recent projects :

Diapiric crustal exhumation and convection of partially molten orogenic crust, in 3D (Naxos case, Vanderhaeghe et al;, 2018); in collaboration with the Fluid Mechanics Institute in Toulouse (IMFT, with Thomas Bonometti) and the PHD of Aurélie Louis-Napoléon (2020). We published a methodological paper on the validation of VOFs methods to model gravitational instabilities (Louis-Napoléon et al., 2020). In a paper part I (Louis-Napoléon et al., 2022). when assuming that: partially molten material can be represented by deformable heterogneous inclusions, we our study reveals distinct segregation regimes depending on 2 Rayleigh numbers (for partially molten and unmolten domains). Additional conditions for the development of simultaneous convection and domes in 3D are explored, including an application case to Naxos, cf. Louis-Napoléon et al. 2023, part II.
We have developed models to seismo-volcanic areas in Southern Chile, in collaboration with Dominique Rémy (GET), José Cembrano (PUC, Santiago, Chile) and A. Tassara (UDEC, Concepcion, Chile) , cf. Novoa Lizama et al. (2019) investigating visco-elastic deformation at Laguna del Maule, and Novoa et al. (2022) exploring volcano-tectonic failure at Cordon Caulle.
A joint ECOS project with Pr. José Cembrano (PUC Santiago) enabled us to test several configurations for the interaction of a fault zone and a magma reservoir, in their ability of mutual triggering (Ruz Ginouves et al., 2021): GET-Pub page here: de failles et volcans au sud Chili.
In collaboration with OVPF, we studied numerically the mechanical significance of persistent seismicity at Piton de la Fournaise, and we are now studying the mechanical behavior of the recent, sub-marine seismo-volcanic activity near Mayotte (de Sagazan et al.,2024).

Current projects:

Continuying developments of the MultiMeltInterFoam solver (OpenFOAM), with i) Oleg Melnik on modeling convection in a « Krafla » magma chamber, ii) Thomas Bonometti on coupling with chemical evolution via an effective porous medium.
Dumont d’Urville french-New-Zealand collaborative partnership on modeling faults and volcanoes in the North Island, with S. Ellis et al. (GNS).
Research on the rôle of faults intersection in localising surface geofluids flow and seismicity along the Central Chilean Margin, with J. Cembrano et al. (PUC).

Publications

Recent publications

-Ruz Ginouves, J. R., Gerbault, M., Cembrano, J., Iturrieta, P., Leiva, F. S., Novoa, C., & Hassani, R. The interplay of a fault zone and a volcanic reservoir from 3D elasto-plastic models: Rheological conditions for mutual trigger based on a field case from the Andean Southern Volcanic Zone. J. Vol. Geoth. Res., 107317 (2021).

-Louis-Napoléon A., Bonometti T., Gerbault M., Martin R., Models of convection and segregation in heterogeneous partially molten crustal roots with a VOF method – Part I: flow regimes (Louis-Napoleon et al., part I, GJInt, 2021).

– Novoa C., M. Gerbault, D. Remy, J. Cembrano, L.E. Lara, J. Ruz-Ginouves, A. Tassara, J.C. Baez, R. Hassani, S. Bonvalot, R. Contreras-Arratia (2022). The 2011 Cordón Caulle eruption triggered by slip on the Liquiñe-Ofqui fault system, Earth Planet. Sci. Lett., doi: 10.1016/j.epsl.2022.117386

– Gerbault, M., Fontaine, F. J., Peltier, A., Got, J. L., Hassani, R., Ferrazzini, V., Gailler L., Duputel, Z. (2022). What causes the persistent seismicity below the eastern flank of Piton de la Fournaise (la Réunion Island)? Elasto-plastic models of magma inflation. J. Volcan. Geothermal Res. https://doi.org/10.1016/j.jvolgeores.2022.107628

– Sáez-Leiva F., D. Hurtado, M. Gerbault, J. Ruz-Ginouves, P. Iturrieta, J. Cembrano (2023). Fluid flow migration, rock stress and deformation due to a crustal fault slip in a geothermal system: A poro-elasto-plastic perspective, Earth and Planetary Science Letters, https://doi.org/10.1016/j.epsl.2023.117994.

-Louis-Napoléon A., Gerbault M., Bonometti T., Vanderhaehge O.? Roland M., Maury N. (2024). Convection and segregation in orogenic with aVOF method, part II : how to form migmatite domes, Geophys. J. Int, https://doi.org/10.1093/gji/ggad388

-de Sagazan, C., Retailleau, L., Gerbault, M., Peltier, A., Feuillet, N., Fontaine, F. J., & Crawford, W. C. (2024). Seismicity near Mayotte explained by interacting magma bodies: Insights from numerical modeling. J. Volc. Geoth. Res., https://doi.org/10.1016/j.jvolgeores.2023.107985.

Muriel Gerbault

Rechercher