Géosciences Montpellier


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Sylvie Demouchy

Short CV and publications

Sylvie Demouchy
CNRS researcher (CR1)

Research positions and education

June 2014, HDR Univ. Montpellier 2, (French habilitation to direct scientific research)

Nov- 2007/ to present - CNRS scientific researcher (CR1) at Géosciences Montpellier, France.

2004/2007 - Research associate (post-doctoral fellowship) at the Lunar and Planetary Inst. USRA, Houston, visiting researcher at the University of Minnesota, Minneapolis.

2000/2004 - Ph.D in Earth Sciences (Dr. rer. nat.), Bayerisches Geoinstitut, University of Bayreuth, Germany.

Before : DEUG SVT, licence STU, Maitrise STU in Earth Sciences at Aix-Marseille I and III Universities, South of France. DEA-Dynamique de la lithosphère in Grenoble (ISTERRE, UJF).

Team manteau-interfaces. webpage

Petrophysics lab. webpage

Project PoEM. webpage ’Pasticity of Earth Mantle’ - IRG Marie-Curie - 2008-2012, PI : Sylvie Demouchy, coord. A. Tommasi. (Geosciences Montpellier, France).

JPEG - 5.5 ko

Project HyDEEP. webpage ’Hydrogen cycle within the Deep Earth’ - ANR JCJC 2012-2016 - PI : N.Bolfan-Casanova (LMV Clermont-Ferrand, France).

Project INDIGO. webpage ’Incorporation and diffusion of noble bases in grain boundaries’ - ANR Blanche - 2014-2019. - PI : P. Burnard (CRPG Nancy, France).

Research interests

  • Mineral physics and igneous petrology
  • Point defects in solids, diffusion and deformation processes.
  • Concentration, distribution and mobility of hydrogen in nominally anhydrous minerals
  • Peridotites (thoses losing hydrogen...), komatiites and other ultramafics.
  • Experimental apparatus (piston-cylinder, TZM vessel, multi-anvils, Paterson apparatus)



27. Mussi A. Cordier P., Demouchy S.. Characterization of dislocation interactions in olivine using electron tomography. Accepted manuscript, Phil. Mag. December 2014.

26. *Batiste, V., Vauchez, A., Tommasi, A., Demouchy S.. Rubnick, R. (2015) Deformation, hydration, and anisotropy of the lithospheric mantle in an active rift : constraints from mantle xenoliths from the North Tanzanian Divergence of the East African Rift. Accepted, Tectonophysics. doi : 10.1016/j.tecto.2014.11.011 2014.

25. Demouchy S., Ishikawa A., Tommasi A., Alard, O. and Keshav S. (2015) Characterisation of the hydration in the oceanic mantle lithosphere : peridotite xenoliths from Ontong Java Plateau as an example. Lithos. 212-215:189-201. doi : 10.1016/j.lithos.2014.11.005.

24. Thoraval C. & Demouchy S. (2014) Numerical models of ionic diffusion in one and three dimensions : Application to dehydration of mantle olivine. Phys. Chem. Minerals, 41:709–723. doi:10.1007/s00269-014-0685-x.

23. Demouchy S., Mussi, A, Barou, F., Tommasi A., Cordier P. (2014). Viscoplasticity of polycrystalline olivine at high pressure and 900°C. Tectonophysics, doi:10.1016/j.tecto.2014.03.022.

22. Mussi A. Cordier P., Demouchy S., Vanmansart C. (2014) Characterisation of the glide planes of the [001] screw dislocations in olivine using electron tomography. Phys. Chem. Minerals. DOI : 10.1007/s00269-014-0665-1.

New : Paterson’s press and EBSD of Montpellier in Nature !
INSU news in French : here
ScienceDaily in English : here
Les Scienze in Italian here

21. Cordier P., Demouchy S., Beausir B., Taupin V., Barou F. & Fressengeas C. (2014) Disclinations provide the missing mechanism for deforming olivine-rich rocks in the mantle. Nature. 507, 51-56. doi : 10.1038/nature13043.

20. *Soustelle V., Tommasi A., Demouchy S., Leander F. (2013) Melt-rock interactions, deformation, hydration, and seismic properties in the sub-arc lithospheric mantle inferred from xenoliths from seamounts near Lihir, Papua-New-Guinea. Tectonophysics, 608:330-345.

19. Demouchy S.., Tommasi A., Boffa-Ballaran T., Cordier, P. (2013) Low strength of Earth’s uppermost mantle inferred from tri-axial deformation experiments on dry olivine crystals. Phys. Earth Planet. Int. 220 : 37-49 (doi : 10.1016/j.pepi.2013.04.008).

18. *Denis C, Demouchy S., Shaw C.S.J., (2013) Evidence of dehydration in peridotites from Eifel Volcanic Field and estimates of magma ascent rates. J. Volcan. Geotherm. Res 258 : 85-99 (doi : 10.1016/j.jvolgeores.2013.04.010).

17. *Baptiste V., Tommasi A., Demouchy S., (2012) Deformation and hydration of the lithospheric mantle beneath the Kaapval craton. Lithos. Sp. Issue ’Formation, reactivation and destruction of cratons’, 149:31-50 (doi : 10.1016/j.lithos.2012.05.001).

16. Bolfan-Casanova N., Munoz M., McCammon C., Deloule E., Férot A., Demouchy S., France L., Andrault D., Pascarelli S.(2012) Ferric iron and water incorporation in wadsleyite under hydrous and oxidizing conditions : a XANES, Mössbauer and SIMS study Am. Min. 97:1483-1493.

15. Demouchy S., Tommasi A., Barou F., Mainprice D., Cordier P., (2012). Deformation of olivine in torsion under hydrous conditions. Phys. Earth Planet. Int. 202-203 : 56-70 (doi : 10.1016/j.pepi.2012.05.001).

14. Demouchy S., Mainprice, D., Tommasi, A., Couvy, H., Barou, F., Frost D J., Cordier, P., (2011) Forsterite to wadsleyite phase transformation under stress and consequences for the Earth’s mantle transition zone. Phys. Earth Planet. Int. 184, 91-104.

13. Demouchy S., (2010b) Hydrogen Diffusion in Spinel Grain Boundaries and consequences for chemical homogeneisation in Earth’s Mantle. Contrib. Mineral. Petrol. In press, 160:887-898, doi : 10.1007/s00410-010-0512-4.

12. Demouchy S., (2010a) Diffusion of Hydrogen in Olivine Grain Boundaries and Implications for the Survival of Water-rich Zones in the Earth’s Mantle. Earth Planet Sci. Lett. 295:305-313, doi :10.1016/j.epsl.2010.04.019

11. *Soustelle V., Tommasi A., Demouchy S., Ionov D. (2010) Deformation and fluid-rock interactions in supra-subduction mantle : Microstructures and water contents in peridotite xenoliths from the Avacha volcano, Kamchatka, J. Petrol, 51:363-394.

10. Demouchy S., Schneider S. E., Mackwell S. J., Zimmerman M. E., Kohlstedt D L. (2009) Experimental deformation of olivine single crystals at lithospheric temperatures, Geophys. Res Lett. 36 : L04304, doi:10.1029/2008GL036611.

9. Kamemetsky V, Kamenetsky M B, Sobolev A V, Golovin A V, Demouchy S., Faure K, Sharygin V V, Kuzmin D V.(2008) Olivine in the Udachnaya-East kimberlite : types, compositions and origins. J. Petrol. 49 : 823 - 839.

8. Demouchy S., Mackwell S.J., and Kohlstedt D. L. (2007) Influence of hydrogen on Mg-Fe interdiffusion in (Mg,Fe)O and implication for the Earth’s lower mantle. Contrib. Mineral. Petrol., 154:279-289.

7. Walker A.M, Demouchy S., and Wright K. (2006) Computer modelling of the energies and vibrational properties of hydroxyl groups in α- and β-Mg2SiO4. Eur. J. Mineral, 18 (5), 529-543.

6. Demouchy S., and Mackwell S. (2006) Mechanisms of hydrogen incorporation and diffusion in iron-bearing olivine. Phys. Chem. Minerals, 33, 347-355.

5. Demouchy S., Jacobsen S. D., Gaillard F. and Stern C. R. (2006) Rapid magma ascent recorded by water diffusion profiles in mantle olivine. Geology, 34, 429-432.

4. Demouchy S., Deloule E., Frost D. J. and Keppler H. (2005) Temperature and pressure dependence of water solubility in iron free-wadsleyite. Am. Mineral, 90, 1084-1091.

3. Jacobsen S. D, Demouchy S., Frost, D. J. Boffa Ballaran T. and Kung J. (2005) A systematic study of OH in hydrous wadsleyite from polarized FTIR spectroscopy and single-crystal X-ray diffraction : oxygen sites for hydrogen storage in the Earth’s interior. Am. Min., 90, 61-70.

2. Bureau H., Trocellier P., Shaw C., Khodjia H., Bolfan-Casanova N. and Demouchy S., (2003) Determination of the concentration of water dissolved in glasses and minerals using nuclear microprobe. Nuclear Instrument Methods. ICNMTA 2002. Special issue, B201, 449-454.

1. Demouchy S., Mackwell S. (2003). Water Diffusion in Synthetic Iron-Free Forsterite. Phys. Chem. Minerals. 30. 786-794.

Recent presentations at scientifc institutions and meetings

Demouchy S. (2014) Distribution of Hydrogen in the Mantle Lithosphere. 6th Lherzolite Conference, 4-15 May 2014, Marrakech, Morroco (Talk).

Demouchy S., Mussi A. Barou F., Tommasi A. and Cordier P,. (12/2013) Visco-plasticity of polycrystalline olivine at high pressure and 900°C : fresh outcomes from high resolution EBSD and electron tomography. Session T43. AGU Fall meeting 2013, December 2013. San Franscisco, USA (Talk).

Demouchy S., 19/06/2013, ‘Déformation en compression tri-axial de monocristaux d’olivine à basse température : Implication pour le rhéologie du manteau terrestre’. Laboratoire Magmas et Volcans, Université Blaise Pascal, Clermont-Ferrand., France. Invited seminar

Demouchy S.(26/04/2012)."Solubility and Diffusivity of Water in the Deep Earth : Lab & Fields, Consequences & Challenge. CRPG, Nancy, France. Invited seminar.

Other strong and invasive interests outside the lab

Books, Food, modern and street art, photography (perso selection visible here), english gardens and american landscapes, architecture, english poetry (especially e.e.cummings), european cinema, New York City by night and by day, japanese green tea, agedashi tofu, ishigodaifuku & kinkandaifuku, India, bondi ladoo, pakoras, silk sari, Istanbul the cosmopolite & Constantinople the historic.............. and of course to drink Chablis, to make capsule, to bother you.

CV in English, just there.........

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