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I am professor of Earth Sciences at the University Joseph Fourier - Grenoble I, adjunct Professor at the University of Oslo, and member of the Institut Universitaire de France. I also serve as Deputy Vice-President of the University Joseph Fourier, in charge of research in Earth's Sciences, Astrophysics&Planetology, Hydrology&Climate Studies, Sport Studies, and Geography.
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François Renard Université Joseph Fourier - Grenoble I LGCA / OSUG / CNRS
BP 53, 38041 Grenoble, France
tel
: (+33) (0) 476 635 907 mail : francois.renard@ujf-grenoble.fr
To reach LGCA LGCA - Maison des Géosciences, 1381 rue de la piscine, Saint Martin d'Hères A map of the university campus is here (tramway stop Bibliothèques-Universités, lines B, C). Go to IS-Terre building.
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Research interests In the Earth's crust, rocks can deform slowly over geological times or very fast during an earthquake for example. The main difficulty with long-term deformation comes from the fact that only observations of an already deformed state are available. The geologist has to imagine which mechanisms have induced such finite state of deformation. It appears that, over long duration, chemical effects such as dissolution and precipitation, fluid transport along faults or in porous rocks provide successful mechanisms of deformation and mass transfer in porous rocks and faults. This is why the term mechano-chemical deformation was coined. These processes occur at all scales, from atomic scale of mineral-fluid interfaces to the scale of a fault or even the whole crust. They need to be studied by different approaches: observations of natural samples, experiments to reproduce in laboratory conditions that are observed in nature, analytical analysis and numerical simulations to determine which parameters are involved.
Topography of the Vuache fault measured using high resolution LIDAR. The striations at all scales witness friction processes during fault slip. Main research topics - Behavior of thin confined water films at grain contacts, thermodynamics of chemical reactions under stress - Pressure solution creep mechanism in the upper crust : Effects on diagenesis of sandstones and limestones and compaction around active faults, role of clays - Finite Elements simulations of the coupling between pressure solution at the grain scale and transport of solutes by diffusion at the meter scale in the rocks of the Earth's upper crust - Reaction fronts instabilities and fingering patterns in water-rock interactions (self-organization in the reaction-infiltration feedback loop) - Dynamics of fracture healing at a grain scale : analogue experiments with gels - Formation of stylolites - Mechano-chemical processes during CO2 geological sequestration in reservoirs or primary migration of fluids in low permeability rocks (experiments and theory) - Nucleation and growth of carbonate minerals and role of impurities on the kinetics of precipitation - Roughness of exhumed fault planes and relationship with stress concentration and earthquakes nucleation - Stress induced instabilities on free solid surfaces - Mechanisms of deformation in active faults Teaching Bachelor Degree of Earth Sciences (Licence Professionnelle) - Hydrogeology: Exploitation and Preservation of Underground Waters (with Jérôme Nomade) Master of Earth Sciences, 1st year - Solid Mechanics Applied to Earth Sciences (with Mai-Linh Doan) - Tectonophysics (with Arnaud Pécher and Jean Braun) Research Master of Earth Sciences, 2nd year - Rheology, Rupture, and Instabilities in the Earth's crust (with Jérôme Weiss and Jean-Robert Grasso) Professional Master of Hydrogeology, 2nd year - Multiphase flow in porous medium |
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