General tectonic setting of the Athabasca Uranium deposits along the Wollaston-Mudjatik Zone (Saskatchewan, Canada). (a) Geological map showing location of mining areas along the Wollaston-Mudjatik zone and mainly below the Athabaska basin (After Annesley et al., 2005). (b) Schematic cross-section showing typical occurrences of uranium deposits along major basement major mylonitic shear zones and at basement-basin interface above them (Illustration from courtesy of AREVA).