Structural Controls of Uranium Mineralization in the Basement of the Athabasca Basin, Saskatchewan, Canada

Figure 20

Deformation patterns and textures observed in mineralized dilation jog zones. (a, b) Reopened foliation with disseminated mineralization in a graphite-rich shear zone ([email protected] m, 3800 cps; [email protected] m, 5500 cps, respectively). Reopened foliation is underlined by pale grey clay (a) and white clay-carbonate (b) sealed veins. (c) Mineralized vein (pink) with parallel white clay-carbonate and quartz veins (arrows) reopening foliation ([email protected] m, >10.000 cps). (d) Well-developed cataclastic corrosion/dissolution breccia (HK15-33@358 m). (e) Protocataclastic-corrosion/dissolution breccia still showing the initial microfractures from which fluids leaked into the host rock (HK15-33@357 m). (f) Protocataclastic corrosion/dissolution breccia from Midwest deposit (MW-855A, 500 cps). (g) Sketch of (f) showing the corrosion/dissolution pattern. (h) « Wormy » texture with mineralization from McClean Project (Caribou). Precise location unavailable (see [57]). Scale: diameter of the drill core of all pictures is 8.5 cm.