Thermochemical sulfate reduction (TSR) commonly occurred in the dolostone reservoirs of Upper Permian Changxing Formation (P3c) Yuanba (YB) gas field, Sichuan Basin, yet controversy remains regarding source required for TSR. To trace sulfate, sulfur and strontium isotopic compositions were measured three diagenetic celestite (SrSO4) samples found P3c YB field. In addition, Carbonate-associated ...

A pluridisciplinary approach was used to define iodine immobilization mechanisms by biocarbonates in a natural marine carbonate-bearing clayey formation. For this purpose, different techniques of observation (optical microscope, scanning electron microscope (SEM), cathodoluminescence (CL)) and of analyses (infrared spectrometry (IR), electron microprobe (EPMA), spatially resolved synchrotron-ba...

The accumulation of stable strontium and its chemical analogue calcium by four species of earthworm, representing three distinct ecophysiological groups inhabiting celestite (SrSO4)-rich natural soils, was investigated. An increase in soil strontium concentration over a four-orders-of-magnitude range was accompanied by an increase in earthworm tissue strontium concentration. In contrast, no rel...

Barite (Ba[SO4]) is one of the promising candidates for sequestration radioactive waste. can incorporate radium (Ra) and form ideal solid solutions, i.e., (Ba,Ra)[SO4]. Together with isostructural celestite (Sr[SO4]), ternary (Ba,Sr,Ra)[SO4], may exist in natural conditions. Our fundamental understanding dissolution kinetics sulfates critically important a better risk assessment nuclear waste r...

The characterisation of porewater chemistry in nanoporous clayrocks is a difficult task. Appropriate extraction methods that have been developed fairly recently and the Mont Terri Rock Laboratory (Switzerland) played pioneer role this regard. During last 25 years high-quality data from Opalinus Clay acquired. Notably, since early synthesis Pearson et al. (2003) considerable number newer borehol...

Strontium carbonate (SrCO3) is one of the most important strontium compounds that have been used in a variety of technological and industrial applications. In the present investigation, nano-structured strontium carbonate was synthesized by mechano-chemical reaction of celestite ore (SrSO4) collected from Dasht-e kavir, Iran and sodium carbonate during high energy mechanical milling.The milling...