1215 Table 3 – Chemical results for samples collected from basaltic rocks at the N4E mine bench 4.2 Mineralogical Characterization Among the 37 samples analyzed, just one (SSDFD00962AE016) reached 30 wt%, exceeding the equivalent maximum quartz content permitted for soil remineralizer applications of 25 vol% (Figure 3). Overall, the samples show high modal abundances of biotite, chlorite, and K-feldspar, reflecting hydrothermal alteration of variable intensity with a predominantly potassic signature consistent with descriptions reported from the CMP literature. In several samples, biotite plus K-feldspar together account for more than 60% of the mode, underscoring the dominance of K bearing mineral phases. Figure 3 – Modal mineralogy of samples collected from the N3, N4, N5, and S11 mines in wt%,
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