Phase 2 Initial Borehole Drilling and Testing, Ignace Area. Thin Section Petrography and Lithogeoche

Anhedral crystals of plagioclase (Photomicrograph 1a) prevail over the fine-grained flakes of biotite and the subordinate crystals of quartz in the groundmass. [...] The quartz phenocrystals are homogeneously dispersed within the groundmass, and in some cases, show embayment indicating the disequilibrium of the phenocrystals in the groundmass during the magma crystallization. [...] The fine-grained crystals of plagioclase dominate the composition of the groundmass and are intergrown with subordinate and fine-grained crystals of quartz. [...] The amount of alteration distinguishes the inequigranular crystals of plagioclase from the quartz and the alkali feldspar. [...] The distribution of the alkali feldspar can be observed in the image of the stained billet (please see the corresponding billet photo), in which the alkali feldspar is stained yellow.