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Marie Estelle Solange Violay

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Related publications (61)

Petrophysical properties of the Muschelkalk from the Soultz-sous-Forêts geothermal site (France), an important lithostratigraphic unit for geothermal exploitation in the Upper Rhine Graben

Marie Estelle Solange Violay, Michael Heap, Alexandra Roma Larisa Kushnir

2019

Fault reactivation during fluid pressure oscillations: transition from stable to unstable slip

Marie Estelle Solange Violay, Corentin Jean-Marie Rémi Noël, François Xavier Thibault Passelègue, Carolina Giorgetti

High‐pressure fluid injection in deep geo‐reservoirs can induce earthquakes. Recent observations suggest that cyclic injections might trigger less seismicity than monotonic injections. Here, we report triaxial laboratory experiments conducted on faulted qu ...

2019

Effect of water and rock composition on re-strengthening of cohesive faults during the deceleration phase of seismic slip pulses

Marie Estelle Solange Violay, Chiara Cornelio, François Xavier Thibault Passelègue

2019

Effect of fluid viscosity on fault reactivation and co‐seismic weakening

Marie Estelle Solange Violay, Chiara Cornelio, François Xavier Thibault Passelègue

High‐viscosity fluids are often used during hydraulic fracking operations in geo‐reservoirs. Here, we performed dedicated experiments to study the influence of fluid viscosity on fault reactivation and associated induced earthquakes. Experiments were condu ...

2019

Pore space properties in carbonate fault rocks of peninsular Italy

Marie Estelle Solange Violay

The fault cores of extensional faults in Mesozoic limestones and dolostones are examined by mean of combined microstructural, ultrasonic and petrophysical analyses. Grain-supported fault rocks commonly localize in the outer fault cores, whereas matrix-supp ...

2019

Time-dependent deformations of sandstone during pore fluid pressure oscillations: implications for natural and induced seismicity

Marie Estelle Solange Violay, Corentin Jean-Marie Rémi Noël, Lucas Xan Pimienta

2019

Anomalous Vp/Vs ratios at seismic frequencies might evidence highly damaged rocks in subduction zones

Marie Estelle Solange Violay, Lucas Xan Pimienta

Unusually high compressional (P) to shear (S) wave velocity ratios (V-p/V-s) were measured at different subduction zones and interpreted as fluid-pressurized regions. Because no laboratory data reported such high values in isotropic rocks, mineralogical or ...

2018

Dynamic weakening during earthquakes controlled by fluid thermodynamics

Marie Estelle Solange Violay, Mateo Alejandro Acosta, François Xavier Thibault Passelègue

Nature Research2018

Evolution in physical properties of quartz-bearing rocks with evolving degree of microfissuration

Marie Estelle Solange Violay, Lucas Xan Pimienta

2018

Do scaly clays control seismicity on faulted shale rocks?

Luis Felipe Orellana Espinoza, Marie Estelle Solange Violay

2018

Frictional Properties of Opalinus Clay: Implications for Nuclear Waste Storage

Luis Felipe Orellana Espinoza, Marie Estelle Solange Violay

2018

Porosity evolution at the brittle-ductile transition in the continental crust: Implications for deep hydro-geothermal circulation

Marie Estelle Solange Violay, Mateo Alejandro Acosta, Michael Heap

Recently, projects have been proposed to engineer deep geothermal reservoirs in the ductile crust. To examine their feasibility, we performed high-temperature (up to 1000 degrees C), high-pressure (130 MPa) triaxial experiments on granite (initially-intact ...

Springer Nature2017

From rock to magma and back again: The evolution of temperature and deformation mechanism in conduit margin zones

Marie Estelle Solange Violay, Michael Heap

Explosive silicic volcanism is driven by gas overpressure in systems that are inefficient at outgassing. The zone at the margin of a volcanic conduit-thought to play an important role in the outgassing of magma and therefore pore pressure changes and explo ...

Elsevier2017

Clumped isotope fractionation during phosphoric acid digestion of carbonates at 70°C

Marie Estelle Solange Violay

The application of clumped isotopes (Delta(47)) in carbonate minerals as a sensitive temperature proxy in paleo-environments depends on a well-constrained clumped isotope fractionation for the necessary step of phosphoric acid digestion of the carbonate mi ...

Elsevier2016

An empirically-based steady-state friction law and implications for fault stability

Marie Estelle Solange Violay

Empirically based rate-and-state friction laws (RSFLs) have been proposed to model the dependence of friction forces with slip and time. The relevance of the RSFL for earthquake mechanics is that few constitutive parameters define critical conditions for f ...

American Geophysical Union2016

Frictional evolution, acoustic emissions activity and off-fault damage in simulated faults sheared at seismic slip rates

Marie Estelle Solange Violay, François Xavier Thibault Passelègue

We present a series of high-velocity friction tests conducted on Westerly granite, using the Slow to HIgh Velocity Apparatus (SHIVA) installed at Istituto Nazionale di Geofisica e Vulcanologia Roma with acoustic emissions (AEs) monitored at high frequency ...

Amer Geophysical Union2016

G: Fracture energy, friction and dissipation in earthquakes

Marie Estelle Solange Violay

Recent estimates of fracture energy G (') in earthquakes show a power-law dependence with slip u which can be summarized as G (') ae u (a) where a is a positive real slightly larger than one. For cracks with sliding friction, fracture energy can be equated ...

Springer2016

Dislocation Motion and the Microphysics of Flash Heating and Weakening of Faults during Earthquakes

Marie Estelle Solange Violay, Andrea Cavallo

Earthquakes are the result of slip along faults and are due to the decrease of rock frictional strength (dynamic weakening) with increasing slip and slip rate. Friction experiments simulating the abrupt accelerations (>>10 m/s(2)), slip rates (similar to 1 ...

Mdpi Ag2016

Ductile flow in sub-volcanic carbonate basement as the main control for edifice stability: New experimental insights

Marie Estelle Solange Violay

Limestone in volcanic basements has been identified as a hazard in terms of edifice stability due to the propensity of calcite to decompose into lime and CO2 at high temperatures (>600 °C), causing a decrease in mechanical strength. To date, such hypoth ...

Elsevier2015

Thermo-mechanical pressurization of experimental faults in cohesive rocks during seismic slip

Marie Estelle Solange Violay

Earthquakes occur because fault friction weakens with increasing slip and slip rates. Since the slipping zones of faults are often fluid-saturated, thermo-mechanical pressurization of pore fluids has been invoked as a mechanism responsible for frictional d ...

Elsevier2015

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