A5008331980- Rock Mechanics and Modeling
- earthquake and tectonic studies
- Geological and Geochemical Analysis
- Landslides and related hazards
- High-pressure geophysics and materials
- Pain Management and Placebo Effect
- Hydrocarbon exploration and reservoir analysis
- Drilling and Well Engineering
- CO2 Sequestration and Geologic Interactions
- Seismic Imaging and Inversion Techniques
- Geotechnical and Geomechanical Engineering
- Hydraulic Fracturing and Reservoir Analysis
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Seismic Waves and Analysis
- Planetary Science and Exploration
- Building materials and conservation
- Geophysical Methods and Applications
- Geochemistry and Geologic Mapping
- Geothermal Energy Systems and Applications
- Seismology and Earthquake Studies
- Groundwater flow and contamination studies
- Tunneling and Rock Mechanics
- Earthquake Detection and Analysis
- Geological formations and processes
Université de Strasbourg
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Institut Terre & Environnement de Strasbourg
2020-2025
Institut Universitaire de France
2021-2025
Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé
2024
École Polytechnique Fédérale de Lausanne
2022-2024
Institut de Physique
2013-2022
Terre des Hommes
2021-2022
Université Paris Cité
2022
Institut de physique du globe de Paris
2013-2021
The characterization of time‐dependent brittle rock deformation is fundamental to understanding the long‐term evolution and dynamics Earth's crust. chemical influence pore water promotes through stress corrosion cracking that allows rocks deform at stresses far below their short‐term failure strength. Here, we report results from a study creep in water‐saturated samples Darley Dale sandstone (initial porosity, 13%) under triaxial conditions. Results conventional experiments show axial strain...
Our study investigates the genesis of granitic reservoirs formed within a brittle shear zone in central Finland, evaluating their feasibility as deep geothermal targets. We employ suite laboratory-based experiments and cutting-edge analytical mineral techniques to determine petrophysical thermal properties targeted rocks, elucidating formation processes. The most favorable reservoir were observed granites affected by cataclasis dissolution, leading notable secondary porosity ∼20 %. Reservoir...
In the upper crust, chemical influence of pore water promotes time dependent brittle deformation through sub‐critical crack growth. Sub‐critical growth allows rocks to deform and fail at stresses well below their short‐term failure strength, even constant applied stress (“brittle creep”). Here we provide a micromechanical model describing creep water‐saturated under triaxial conditions. Macroscopic is modeled on basis microcrack extension compressive due The incremental strains cracks in...
Abstract The reliable assessment of volcanic unrest must rest on an understanding the rocks that form edifice. It is their microstructure dictates physical properties and mechanical behavior thus response edifice to stress perturbations during unrest. We evaluate interplay between rock for a suite edifice‐forming from Volcán de Colima (Mexico). Microstructural analyses expose (1) pervasive, isotropic microcrack network, (2) high, subspherical vesicle density, (3) wide size distribution. This...
The characterization of time‐dependent brittle creep, promoted by chemically active pore fluids, is fundamental to our understanding the long‐term evolution and dynamics Earth's crust. Here we report results from a study influence temperature on both short‐term strength creep in three sandstones under triaxial stress conditions. We show that an increase 20° 75°C significantly enhances corrosion cracking all sandstones, leading (1) systematic reduction during constant strain rate experiments...
The elastic moduli of rock in areas susceptible to crack damage, such as within fault zones or volcanic edifices, can be subject large modifications. Knowledge how may vary situations is important for both the reliable modelling volcano deformation and stability linear non-linear models earthquake rupture. Furthermore, it has previously been shown that changes induce stress field surrounding faults. Here we report uniaxial experimental measurements during increasing-amplitude cyclic...
Abstract To monitor both the permanent (thermal microcracking) and nonpermanent (thermo‐elastic) effects of temperature on Westerly Granite, we combine acoustic emission monitoring ultrasonic velocity measurements at ambient pressure during three heating cooling cycles to a maximum 450°C. For use P wave direct traveltime coda interferometry techniques, latter being more sensitive changes in S velocity. During first cycle, observe high rate large—and mostly permanent—apparent reductions with...
We develop a unifying framework to quantify rate‐dependent deformation in the brittle field and establish links between microscale time‐dependent crack growth processes macroscopically observed rate dependency. Triaxial experiments have been performed under both constant strain stress (creep) conditions on three types of sandstone. The measured relative evolution P wave speeds as function inelastic axial is similar for test, despite differences up 3 orders magnitude. This similarity...
Abstract We performed triaxial deformation experiments on a water‐saturated porous limestone under constant strain rate and stress (creep) conditions. The tests were conducted at room temperature low effective pressures P eff =10 =20 MPa, in regime where the rock is nominally brittle when tested of 10 −5 s −1 . Under these conditions stress, phenomenon creep occurs. At follows similar trends as those observed other types (e.g., sandstones granites): only small strains are accumulated before...
Volcanic eruptions are regulated by the rheology of magmas and their ability to degas. Both detail evolution stresses within ascending subvolcanic magma. But as magma is forced through ductile-brittle transition, new pathways emerge cracks nucleate, propagate, coalesce, constructing a permeable network. Current analyses dynamics center on models glass neglecting important aspects such incremental strain accommodation (the key monitoring tool of) seismicity. Here, in combined-methods study,...
The failure mode of lava-dilatant or compactant-depends on the physical attributes lava, primarily porosity and pore size, conditions under which it deforms. for edifice host rock has attendant implications structural stability efficiency sidewall outgassing volcanic conduit. In this contribution, we present a systematic experimental study edifice-forming andesitic rocks (porosity from 7 to 25 %) Volcán de Colima, Mexico. experiments show that, at shallow depths (<1 km), both low-...
Volcanic hydrothermal systems host a prodigious variety of physico-chemical conditions. The state and mechanical behaviour rocks within is correspondingly complex often characterised by vast heterogeneity. Here, we present uniaxial triaxial compression experiments designed to investigate the breadth failure modes (dilatant or compactant) for hydrothermally-altered lava ash tuff deposits from Whakaari (White Island volcano) in New Zealand, volcano with well-documented very active system. Our...