Le Pourhiet Laetitia

Equipe : Dynamique et évolution des Marges et des Orogènes

Maître de conférence

UPMC - Campus Jussieu, Tour 46-00, 2e étage - Case courrier 129

Tél : 01 44 27 78 83 - laetitia.le_pourhiet@upmc.fr

Thèmes de recherche

My main research interest is the rheology of the crust and lithospheric mantle and their relationship to plate tectonics at different time- and length-scale. The approach I adopt heavily relies on the usage and the development of numerical codes. However, as a geologist, I place a strong emphasis on model validation using data from structural geology, petrology, thermo-chronology, geodesy and seismology depending on the context and availability of data.

- Geodynamics, tectonics and structural geology modelling.
- Rock mechanics/Rheology/Faulting (theory).
- Development and usage of thermo-mechanical software (Flamar,Gale,pTatin).
- Computer programming (C,Matlab, Fortran77/90, Python, PETSc).

Projets en cours

- 2017-2018 Engie grant thermo-mechanical model of Intra-continental basin subsidence (PhD Student Paul Perron)
- 2016-2019 OROGEN (Collaboration Project INSU-BRGM-Total), obtained 2 years Post doc to work on Thermal regime at onset of collision (post doc starts 1/10/2017)
- 2016-2018 ANR VARPEG: Variscan pegmatites as new potential mineral resources: A conceptual re-evaluation (PI: M. Pichavant). I am coordinator of Task 3 (Modelling) including 2 years post doc salary.
- 2015-2016 INSU-Tienshan (PI Y. Rolland) including financial support for PhD thesis of Anthony Jourdon
- 2013-2017 ITN ZIP Zooming In between Plates (PI: P. Agard). I was coordinator of WP5 (training), in charge of Post Doc J. Ruh and of the secondment of PhD students I. Ioanindi, C. Pranger.

Bibliographie récente

2017

- L. Le Pourhiet, D. May, L. Huille, L. Watremez, and S. Leroy, "A genetic link between transform and hyper-extended margins", EPSL, 2017

- A. Jourdon°, L. Le Pourhiet, C. Petit, and Y. Rolland, Jourdon, A., Le Pourhiet, L., Petit, C. and Rolland, Y., “ The deep structure and reactivation of the Kyrgyz Tien Shan: Modelling the past to better constrain the present”. Tectonophysics. 2017

- A. Jourdon°, C. Petit, Y. Rolland, C. Loury, L. Le Pourhiet, S. Guillot, G. Clément, N. Bellahsen, "Upper paleozoic tectonics in the tien shan (central asian orogenic belt):insight from new structural data (kyrgyzstan)", Gondwanna Research ,2017

- A. Koptev, E. Burov, T. Gerya, L. Le Pourhiet, S. Leroy, E. Calais and L. Jolivet, 2017. Plume-induced continental rifting and break-up in ultra-slow extension context: Insights from 3D numerical modeling. Tectonophysics.

- G. Caravaca° Brayard, A., Vennin, E., Guiraud, M., Le Pourhiet, L., Grosjean, A.S., Thomazo, C., Olivier, N., Fara, E., Escarguel, G. and Bylund, K.G., 2017. Controlling factors for differential subsidence in the Sonoma Foreland Basin (Early Triassic, western USA). Geological Magazine, pp.1-25.

2016

- M. Lafosse°, A. Boutoux°, N. Bellahsen, and L. Le Pourhiet, "Role of tectonic burial on the inversion of inherited basins during collision", Geological Magazine,2016

- L. Labrousse, B. Huet, L. Le Pourhiet, and L. Jolivet, "Rheological implications of extensional detachments : mediterranean and numerical insights", Earth Science Reviews, 2016.

- S. Buiter, G. Schreurs, M. Albertz, T. Gerya, B. Kaus, W. Landry, L. Le Pourhiet, Y. Mishin, D. Egholm, M. Cooke, B. Maillot, C. Thieulot, T. Crook, D. May, P. Souloumiac, and C. Beaumont, "Benchmarking numerical models of brittle thrust wedges", Journal of Structural Geology, 2016.

2015

- L. Mezri°, L. Le Pourhiet, S. Wolf, and E. Burov, "New parametric implementation of metamorphic reactions limited by water content, impact on exhumation along detachment faults", Lithos, vol. 236, pp. 287-298, 2015.

- J. Ruh*, L. Le Pourhiet, P. Agard, E. Burov, and T. Gerya, "Tectonic slicing of subducting oceanic crust along plate interfaces: numerical modeling", Geochemistry, Geophysics, Geosystems, 2015.

- C. Petit, L. Le Pourhiet, B. Scalabrino, M. Corsini, M. Bonnin, and A. Romagny, "Crustal structure and gravity anomalies beneath the rif, northern morocco: implications for the current tectonics of the alboran region", Geophysical Journal International, vol.202, pp. 640-652, 2015.

- L. Jolivet, A. Menant, P. Sternai, A. Rabillard, L. Arbaret, R. Augier, V. Laurent, A. Beaudoin, B. Grasemann, B. Huet, L. Labrousse, and L. Le Pourhiet, "The geological signature of a slab tear below the aegean", Tectonophysics, vol. 659, pp. 166-182, 2015.

- D. May, J. Brown, and L. Le Pourhiet, "A scalable, matrix-free multigrid preconditioner for finite element discretizations of heterogeneous stokes flow", Computer Methods in Applied Mechanics and Engineering, vol. 290, pp. 496-523, 2015.

- S. Leroy, et al., "Segmentation and kinematics of the north america-caribbean plate boundary offshore hispaniola", Terra Nova, 2015.

2014

- L. Le Pourhiet, B. Huet°, and N. Traoré°, "Links between long-term and short-term rheology of the lithosphere: insights from strike-slip fault modelling", Tectonophysics, vol. 631, pp. 146-159, 2014.

- N. Traoré°, L. Le Pourhiet, J. Frelat, F. Rolandone, and B. Meyer, "Does interseismic strain localization near strike-slip faults result from boundary conditions or rheological structure?", Geophysical Journal International, vol. 197, no. 1, pp. 50-62, 2014.

- A. Vacherat°, F. Mouthereau, R. Pik, M. Bernet, C. Gautheron, E. Masini, L. Le Pourhiet, B. Tibari, and A. Lahèd, "Thermal imprint of rift-related processes in orogens as recorded in the pyrenees", Earth and Planetary Science Letters, vol. 408, pp. 296-306, 2014.

- E. Burov, T. Françcois, P. Agard, L. Le Pourhiet, B. Meyer, C. Tirel, S. Lebedev, P. Yamato, and J.-P. Brun, Rheological and geodynamic controls on the mechanisms of subduction and hp/uhp exhumation of crustal rocks during continental collision: insights from numerical models", Tectonophysics, vol. 631, pp. 212-250, 2014.

- D. A. May, J. Brown, and L. Le Pourhiet, Ptatin3d: high-performance methods for long-term lithospheric dynamics", in Proceedings of the International Conference for High Performance Computing, Networking, Storage and Analysis, pp. 274-284, IEEE Press, 2014. (peer reviewed extended abstract accepted for presentation)

2013

- L. Le Pourhiet, "Strain localization due to structural softening during pressure sensitive rate independent yielding", Bulletin de la Societé géologique de france, no. 184, pp. 357-371, 2013.

- L. Le Pourhiet, B. Huet, L. Labrousse, K. Yao, P. Agard, and L. Jolivet, "Strain localisation in mechanically layered rocks beneath detachment zones: insights from numerical modelling", Solid Earth, vol. 4, pp. 135-152, 2013.

- L. Le Pourhiet and J. Saleeby, "Lithospheric convective instability could induce creep along part of the san andreas fault", Geology, vol. 41, no. 9, pp. 999{1002, 2013.

- L. Watremez°, E. Burov, E. d'Acremont, S. Leroy, B. Huet°, L. Le Pourhiet, and N.Bellahsen, "Buoyancy and localizing properties of continental mantle lithosphere: insights from thermomechanical models of the eastern gulf of aden", Geochemistry, Geophysics, Geosystems, vol. 14, no. 8, pp. 2800-2817, 2013.

- O. Lacombe, L. Jolivet, L. Le Pourhiet, E. Lecomte, and C. Mehl, "Initiation, geometry and mechanics of brittle faulting in exhuming metamorphic rocks: insights from the northern cycladic islands (aegean, greece)", Bulletin de la Société Géologique de France, vol. 184, no. 4-5, pp. 383-403, 2013.

- J. Saleeby, Z. Saleeby, and L. Le Pourhiet, "Epeirogenic transients related to mantle lithosphere removal in the southern Sierra nevada region, california: part ii. implications of rock uplift and basin subsidence relations", Geosphere, vol. 9, no. 3, pp. 394-425, 2013.