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Identifying calcium-containing mineral species in the JEB Tailings Management Facility at McClean Lake, Saskatchewan

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dc.contributor.authorBlanchard, Peter
dc.contributor.authorGrosvenor, Andrew
dc.contributor.authorRowson, John
dc.contributor.authorHughes, Kebbi
dc.contributor.authorBrown, Caitlin
dc.date.accessioned2018-05-02T15:42:29Z
dc.date.available2018-05-02T15:42:29Z
dc.date.issued2016
dc.description.abstractThe JEB Tailings Management Facility (TMF) is central to reducing the environmental impact of the McClean Lake uranium mill facility that is operated by AREVA Resources Canada. This facility has been designed around the idea that elements of concern (e.g., U, As, Ni, Se, Mo) will be controlled through equilibrium with precipitants. Confirming the presence of calcium-containing carbonates in the JEB TMF is the first step in determining if gypsum (CaSO4$2H2O) controls the concentration of HCO 3 (aq), limiting the formation of soluble uranyl bicarbonate complexes. A combination of X-ray diffraction (XRD), X-ray absorption near-edge spectroscopy (XANES), and microprobe X-ray fluorescence (XRF) mapping was used to analyze a series of tailings samples from the JEB TMF. Calcium carbonate in the form of calcite (CaCO3), aragonite (CaCO3), and dolomite (CaMg(CO3)2) were identified by analysing Ca K-edge m-XANES spectra coupled with microprobe XRF mapping. This is the first observation of these phases in the JEB TMF. The combination of m-XANES and XRF mapping provided a greater sensitivity to low concentration calcium species compared to the other techniques used, which were only sensitive to the major species present (e.g., gypsum).en_US
dc.description.sponsorshipNSERCen_US
dc.identifier.citationApplied Geochemistry 73 (2016) 98-108en_US
dc.identifier.urihttp://hdl.handle.net/10388/8554
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectUranium miningen_US
dc.subjectCalciumen_US
dc.subjectTailingsen_US
dc.subjectSynchrotron radiationen_US
dc.subjectX-ray absorption spectroscopyen_US
dc.subjectX-ray microprobeen_US
dc.titleIdentifying calcium-containing mineral species in the JEB Tailings Management Facility at McClean Lake, Saskatchewanen_US
dc.typeArticleen_US

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