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Géosciences Rennes
UMR 6118
Université de Rennes1
Campus de Beaulieu
35042 Rennes Cedex

02 23 23 60 76


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Research activities

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Géothermie Soultz Crédit Ecole Mines Paris


Applied Research The beginning of my research activities in BRGM have been devoted to the development of an applied technique of chemical monitoring of drilling fluids. This technique has been used in the oil industry, french nuclear waste disposal investigations and scientific drilling exploration.

In Rennes, we have adapted groundwater dissolved gases analyses with T. Labasque. We have developed the first french laboratory for groundwater dating. V. Vergnaud, PhD in our lab, has then created her own private lab (LADES) which has now become an internal laboratory of the University (Plate-forme CONDATE-Eau).

. [The CONDATE-Eau web site >http://osur.univ-rennes1.fr/page.php?96]



Fundamental Research I have carried out investigations about fluid circulations in the upper continental crust (0-5 km) and water-rock interaction at low temperatures. I have shown potential migration of sedimentary fluids in the continental crust, potential leaching mechanisms, and the relation between fluid circulation and geodynamic events.

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Prélèvement d’une source karstique

During the last years in BRGM, I have managed a project about karstic systems. Chemical and isotopic monitoring have demonstrated the part of the upper weathered part of the karst (epikarst) in the hydrochemical functioning and the water-rock interaction processes in carbonate formations. We are currently working on karstic systems including groundwater ages measurements.

I have developed in Rennes a project focussed on the hydrobiochemical functioning of hard rock aquifers. Three points have been investigated : (1) hydrobiochemical mechanisms of recharge processes, (2) solute and water transfer in fractured hard rock, (3) the influence of groundwater discharge on wetland hydrochemical functioning.


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Analyse des gaz dissous

The method used tries to couple the physical parameters of the transport and the chemical reactivity associated to heterogeneous systems such as fractured medium. I have developed chemical and isotopic tracers of water-rock interactions such as denitrification processes and adapted residence time measurements. My lab in Rennes has developed during the last two years dissolved gases measurements (major, trace and noble gases as well as pollutants such as CFC, SF6, CCl4...).


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Expérimentations sur colonnes de tourbe

During the last two years, I have developed collaborations with microbial ecologists and we are currently investigating the interaction between physical transfer parameters and biological activities. We are currently investigating biodiversity in relation to hydrological fluxes through field measurements and lab experiments.



During the 15 years in Rennes as a full professor, I have directed and co-directed 12 PhD thesis and 15 master thesis.

Liste des thèses :

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Review activities

Associate Editor of Applied Geochemistry (IP 2.0)

About 10 reviews / yr Science (IP>20) ; Geochimica et Cosmochimica Acta (IP : 4.2) ; Chemical Geology (IP : 4.0) ; Environ. Sci & Technology (IP : 5.2) ; J. of Hydrology (IP : 3.3) ; Hydrol. Processes (IP : 2.5) ; Advances in Water resources (IP : 1.4) ...

Numerous reviews for ANR (national Agency for Research), CNRS, French ministery for Education and Research, Canadian Research fund, Israelian Research fund...


Congres organization

. 2015 Co-chairman session « Geological Ressources  » AGU Montreal


2012-2013 Member of the organization committee Water Rock Interaction-14, june 2013 Avignon (350 à600 participants). Salinization session organizer.


2012-2014 Organizator of the international congress Groundwater Dating GDAT-2012 in Rennes in October. This meeting included all the laboratories (more than 30) using groundwater dating methods. An intercalibration experiment was carried out and the meeting also allowed to join geochemists and modellers.

[The G-DAT Meeting web site >http://osur.univ-rennes1.fr/GDAT201...]

The meeting provided a special issue of Applied Geochemistry "Dissolved gases in groundwater and groundwater dating meethods : how useful for hydrogeological modeling" (Nov. 2014) that I edited with D. Goody and J.R. de Dreuzy.


2009-2012 Member of the organization committee of a meeting of the Research Group TRASSE (Oct. 2009). The TRASSE research provided a special issue of Applied Geochemistry "25 years after the Tchernobyl power plant explosion : Management of nuclear wastes and radionuclide transfer in the Environement" (July 2012) that I edited with J.M. Matray and J. Lancelot.


Collaborations and projects

European projects : .

2000-2015 SALTRANS project, IMVUL Marie Curie team, INTERREG CLimawat and 3C projects. .

Geothermal projects in BRGM prior to 2000 .

National scientific projects

2003-2015 : .

4 CNRS EC2CO projects (project manager or member)(unsaturated zone, Hard rock hydrogeology and microbial diversity) .

4 National Research Agency (ANR) projects (Karst and hard-rock aquifer functioning) .

2000-2002 National margin project (Lyon gulf)

1993-1998 Soultz geothermal project (CNRS)

1992-1996 Deep Geology of France programme (Ardèche project) .

From 2002 : National research environmental observatories (Agrhys, P. Mérot and H+, P. Davy). .

Regional research programmes (project manager).

Interaction of groundwater fluxes and wetland in northwest Normandy, regional project 2003-2011 (550 k€)

Residence time and chemical reactivity, regional britanny project (2003-2005) (400 k€) collaboration with BRGM, Universitary Sea Institute (Brest), Climate laboratory (Paris) and Surface Geochemical Center (Strasbourg)

Karstic hydrosystems, regional Languedoc-Roussillon (southern France) region (300 k€).