The Neogene-Paleogene glauconite sands are investigated in the framework of Belgian radioactive waste disposal as material for an additional sorption sink. Glauconite is Fe-rich phyllosilicate that mainly present 125–250 ?m sized pellets sand. Recent studies have shown a surprisingly strong radiocaesium (137Cs) on these sands, despite coarse pellet structure. This study was set up to characteri...

Abstract Reference materials (RMs) with well-characterised composition are necessary for reliable quantification and quality control of isotopic analyses geological samples. For in situ Rb-Sr analysis silicate minerals via laser ablation inductively coupled plasma tandem mass spectrometry (LA-ICP-MS/MS) a collision/reaction cell, there is general lack mineral-specific matrix-matched RMs, which ...

Late Jurassic sandstones of the shallow-marine Sundance Formation contain authigenic chlorite minerals that occur as rosette-like pore fillings of interstratified berthierine/chamosite (B-C) and honeycomb-like pore linings of corrensite and discrete chlorite. B-C is nearly ubiquitous in Sundance sandstones, but is absent near the top of the formation, whereas corrensite and discrete chlorite we...

Recent studies have focused on the formation of authigenic clays in an alkaline soil system surrounding lakes of the Nhecolândia region, Pantanal wetland. The presence of trioctahedral Mg-smectites (stevensite and saponite types), which requires low Al and Fe contents in the soil solution for its formation, contrasts with the neoformation of dioctahedral Fe-mica (glauconite, and Fe-illite), whi...