Carbon isotope compositions of organic matter in fine-grained siliciclastic units deposited above and below glacial diamictite at the base of the ca. 2.45–2.22 Ga Huronian Supergroup in Ontario, Canada were studied to constrain relationships between profound fluctuations in the exogenic carbon cycle and dramatic climate changes at the beginning of the Proterozoic Eon. In both drill core and out...

The argillite extracted from Bure site (France) is proposed, after being crushed and com-pacted, as a possible sealing and backfill material in the geological high-level radioactive waste disposal. In this study, the effects of the grain size distribution and the microstruc-ture on the hydro-mechanical behaviour of the compacted crushed argillite have been investigated. The volume change proper...

Stable isotope characterization of porewater, and dissolved species, in mudrocks and argillaceous rocks is notoriously difficult. Techniques based on physical or chemical extraction of porewater may generate significant analytical artefacts. We report a novel, simple approach to determine the δ 18 O of porewater and δ 13 C of dissolved carbon in argillites. The method uses core samples placed i...

The effect of high temperature on engineering properties rocks has recently become an important topic for geotechnical applications due to the development in geothermal energy extraction, underground coal gasification, disposal nuclear waste and deep mining applications. This study aims investigate four heated at temperatures identify corresponding mineralogical changes. Two types sandstone (Be...

1 INSTRODUCTION In the concept of geological radioactive waste disposal, argillite is being considered as a possible host rock in various countries such as France and Switzerland. This material is chosen thanks to its extremely low permeability that is required to limit the transfer of radioactive elements from the waste package towards the environment. During the construction and exploitation ...