Low strength of Earth's uppermost mantle inferred from tri-axial deformation experiments on dry olivine crystals

S Demouchy, A Tommasi, TB Ballaran… - Physics of the Earth and …, 2013 - Elsevier
We have performed tri-axial compression experiments on single crystals of San Carlos
olivine with various orientations at temperatures relevant for the uppermost mantle, between …

Viscoplasticity of polycrystalline olivine experimentally deformed at high pressure and 900 C

S Demouchy, A Mussi, F Barou, A Tommasi, P Cordier - Tectonophysics, 2014 - Elsevier
We have performed tri-axial compression experiments on olivine aggregates at 900° C and
at a confining pressure of 300 MPa in a high-resolution gas-medium mechanical testing …

Hydrolytic weakening of olivine at mantle pressure: Evidence of [1 0 0](0 1 0) slip system softening from single-crystal deformation experiments

J Girard, J Chen, P Raterron, CW Holyoke - Physics of the Earth and …, 2013 - Elsevier
To date, most of the experiments performed to quantify the hydrolytic weakening of olivine
single crystals have been performed at low confining pressure (and low water fugacities). In …

Axial temperature gradient and stress measurements in the deformation-DIA cell using alumina pistons

P Raterron, S Merkel, CW Holyoke - Review of Scientific Instruments, 2013 - pubs.aip.org
The deformation-DIA apparatus (D-DIA) coupled with synchrotron X-rays allows
investigating materials elastic and plastic properties at high pressure. Most D-DIA …

Pressure effect on forsterite dislocation slip systems: Implications for upper-mantle LPO and low viscosity zone

P Raterron, J Chen, T Geenen, J Girard - Physics of the Earth and …, 2011 - Elsevier
In order to better constrained the effect of pressure (P) on olivine dislocation slip-system
activities, deformation experiments were carried out in a Deformation-DIA apparatus (D-DIA) …

Activities of olivine slip systems in the upper mantle

P Raterron, J Girard, J Chen - Physics of the Earth and Planetary Interiors, 2012 - Elsevier
We investigated the effect of pressure (P) on olivine [100](001) and [001](100) dislocation
slip systems by carrying out deformation experiments in the Deformation-DIA apparatus (D …

Deformation of periclase single crystals at high pressure and temperature: Quantification of the effect of pressure on slip-system activities

J Girard, J Chen, P Raterron - Journal of Applied Physics, 2012 - pubs.aip.org
In order to investigate the effect of pressure on periclase (MgO) dislocation slip-system
activities, creep experiments have been carried out on MgO single crystals, at T and P …

Microstructures and rheology of the Earth's upper mantle inferred from a multiscale approach

O Castelnau, P Cordier, RA Lebensohn… - Comptes Rendus …, 2010 - Elsevier
The strongly anisotropic rheology of olivine polycrystals, associated to their microstructure,
constitutes a key feature affecting the dynamics of the Earth's upper mantle. High pressure …

In situ quantitative analysis of stress and texture development in forsterite aggregates deformed at 6 GPa and 1373 K

C Bollinger, S Merkel, P Raterron - Journal of Applied …, 2012 - journals.iucr.org
The investigation of materials plastic properties at high pressure is a fast-growing field,
owing to the coupling of high-pressure deformation apparatuses with X-ray synchrotron …

Elastic plastic self-consistent (EPSC) modeling of plastic deformation in fayalite olivine

PC Burnley - American Mineralogist, 2015 - pubs.geoscienceworld.org
Elastic plastic self-consistent (EPSC) simulations are used to model synchrotron X-ray
diffraction observations from deformation experiments on fayalite olivine using the …