Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8081805 | Journal of Environmental Radioactivity | 2016 | 12 Pages |
Abstract
The natural U-isotopes concentrations were strongly correlated with dissolution of sulphate evaporites (mainly gypsum). 226Ra had a more complex behaviour, showing a strong correlation with water salinity, which was particularly evident in locations where thermal anomalies were detected. The most saline samples showed the lowest 234U/238U activity ratios, probably due to fast uniform bulk mineral dissolution, which would minimize the impact of solubility-controlled fractionation processes. Furthermore, the high bulk dissolution rates promoted greater groundwater 226Ra/234U ratios because the Ra has a comparatively much greater mobility than U in saline conditions.
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Authors
José Luis Guerrero, Ángela Vallejos, Juan Carlos Cerón, Francisco Sánchez-Martos, Antonio Pulido-Bosch, Juan Pedro BolÃvar,