FIG. 5. Illustration of the complicated distribution of various rock types in the southern Roby zone in the Mine Block intrusion after 1:60 scale mapping by Hinchey et al. (2003). Rocks are divided into early leucocratic, mineralized melanocratic, and late barren melanocratic rocks. The mineralized melanocratic rocks are commonly accompanied by pegmatitic veins and pods of various sizes from several centimeters to 50 cm. Only large pegmatites are shown in the map. Felsic and diabase dikes cut all rock types of the Lac des Iles intrusive complex. Numbers on the sides correspond to the mine grid.