About the
Technical Meeting
THE 43rd TECHNICAL MEETING
An event to present and discuss
about the state of research
The Mont Terri Project is an international research project for the hydrogeological, geochemical and geotechnical characterisation of a clay formation (Opalinus Clay). Every year, the scientists involved in the project meet at the Technical Meeting to exchange ideas and review the status of the research.
With 22 partners from 10 countries, more than 150 people gather each year in Porrentruy, in the magnificent former Jesuit church of the Cantonal Lycée, for this key event in the life of the rock laboratory. Research in clay formations is of interest to many countries, both for the storage of radioactive waste and for the geological storage of CO2.
The year 2026 marks the 30th anniversary of the underground laboratory. It seems appropriate to take this opportunity to summarize and publish the research, asking all responsible scientists and the principal investigators of currently active and recently concluded experiments to prepare a scientific paper for the conference on 29 and 30 April 2026 in Porrentruy. The contributions will be compiled in a booklet with a DOI.
A hub for international research on geological storage since 1996
A Hub for International Research
on Geological Storage
The Mont Terri rock laboratory (St-Ursanne, Jura, Switzerland) is operated by the Swiss Geological Survey at swisstopo and known since 1996 for its international research on deep geological storage of radioactive waste. The rock laboratory also holds a central position in research on the geological storage of CO2, specifically on caprock integrity. In this context, nearly 200 experiments classified into four main categories have been or are being conducted: characterisation of Opalinus Clay, development and methodology, demonstration, and CO2.