CO2 partial pressure in clayrocks: A general model

Eric C. Gaucher, Arnaut Lassin, Catherine Lerouge, Christine Fléhoc, Nicolas C.M. Marty, Benoît Henry, Christophe Tournassat, Scott Altmann, Agnés Vinsot, Stéphane Buschaert, Jean-Michel Matray, Olivier X. Leupin, Mieke de Craen

Research outputpeer-review

1 Scopus citations


An initial geochemical characterization of clayrocks is needed in order to evaluate their feasibility for use as caprocks or host formations for greenhouse gas storage or nuclear waste disposal facilities, respectively. In this context, a method was developed for the measurement of CO2 partial pressure in clayrock pore water. The PCO2 was systematically acquired using core samples obtained from underground laboratories located at 4 locations in Europe. The isotope ratios (C, O) of the gas and of the carbonate minerals were also obtained. The stable isotope ratios limit the possible origins of the CO2 to a thermodynamic equilibrium between aqueous solution species and the diagenetic carbonate minerals (calcite, dolomite), and a Mg-aluminosilicate.

Original languageEnglish
Title of host publicationWater-Rock Interaction
Subtitle of host publicationProceeding of the 3th International Conference on Water-Rock Interaction, WRI-13
PublisherTaylor & Francis (CRC)
Number of pages4
ISBN (Electronic)9781439862995
ISBN (Print)9780415604260
StatePublished - 1 Jan 2010

ASJC Scopus subject areas

  • General Environmental Science
  • General Earth and Planetary Sciences

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