Pelagic deep-sea siliceous successions in accretionary complexes preserve precious records of a vast deep seafloor that is now lost due to plate subduction. Microfossils are the key means age assignment these successions, but poor preservation tectonic deformation and metamorphism at subduction zone hamper biostratigraphic records. X-ray computed microtomography, while not widely used studies u...

Abstract The small stalactites found on the ceiling at level I near Sutoris shaft in thirteenth-century historic salt mine Bochnia, Poland, are mainly composed of mirabilite (Na 2 SO 4 ·10H O) followed by blödite Mg(SO ) ·4H O). unique presence these two minerals only one location this old underground is attributed to contemporary precipitation from percolating solutions. This can be caused a c...

Within the context of deep geological radioactive waste disposal, French National Radioactive Waste Management Agency (Andra) is conducting a research program including in-situ experiments at Meuse/Haute-Marne Underground Research Laboratory (MHM URL), which aims to demonstrate feasibility constructing and operating High Level (HLW) disposal facility in Callovo-Oxfordian (COx) claystone formati...

Abstract The landslide occurred in Sumampir of Purbalingga Regency has reached 120 m length and 50 width. This is suspected to be a retrogressive landslide, which was manned by associated with the cliffs Brangkal River. interpreted as progressive development river bank failures, continues enlarge dimensions measured currently. main active steep scarp along 60 height up 8 m, several transverse t...

The transport of gas in clay-based materials is dominated by diffusion. SCK CEN has studied and recorded an extensive data set diffusion coefficients gases various saturated clays (Boom Clay, Opalinus Callovo-Oxfordian claystone bentonites) used Europe as host formations or engineered barrier systems the context deep geological disposal high intermediate level nuclear wastes. However, partially...

In France, a deep geological disposal for high level radioactive waste (HLW) and intermediate-level long-lived (ILW-LL) called Cigéo is planned to be constructed in Callovo-Oxfordian claystone (COx) formation. The heat released from the HLW packages leads temperature increase host rock, which causes pore pressure essentially due difference between thermal expansion of water solid skeleton. low ...

Abstract Seismic anisotropy and attenuation make claystone formations difficult to characterize. On the other hand, in many geotechnical environments, precise knowledge of structure elastic properties clay is needed. In crystalline rock salt underground structures, high-resolution seismic tomography reflection imaging have proven a useful tool for structural mechanical characterization at scale...

Bentonite is a claystone formed by complex mineralogical mixture, composed of montmorillonite, illite, and accessory minerals like quartz, cristobalite, feldspars, carbonates, minor amounts iron oxy-hydroxides. presents complexity at various scales: (1): single mineral may present different chemical composition within the same quarry (e.g., feldspars solid solutions); (2): montmorillonite varia...

Abstract The present work is based mainly on core rock samples investigation of CSS-38 well, northwest Gulf Suez, Egypt. cores cover the whole South Gharib Formation (upper Miocene). stratigraphic succession Suez includes three mega units, recorded from old to young as pre-rift, syn-rift, and post-rift sediments. syn-rift sediments are Nukhul, Rudies, Kareem, Belayim Equivalent, Gharib, Zeit. r...