2021-07-14_REVISION - M2012032 (4)

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MiSMIDTH Table 3: Modal Mineralogy by QEMSCAN Analyses Mass % in Fraction Size Fraction (micons) Combined +106 -106/+53 -53/+20 -20 Mineral wt. % 33.7 28.43 16.03 21.84 Chalcopyrite 0.56 0.39 0.47 0.71 0.84 Tetrahedrite 0.67 0.51 0.67 0.99 0.67 Other(Cu) 0.03 0.04 0.03 0.02 0.02 Galena 9.32 2.96 12.08 14.97 11.41 Sphalerite 3.11 2.46 3.66 3.89 2.84 Pyrite 2.93 2.31 3.41 3.63 2.74 Arsenopyrite 0.46 0.26 0.58 0.47 0.60 Polybasite 0.04 0.02 0.03 0.07 0.07 Quartz 46.25 54.56 48.61 42.06 33.42 K Feldspar 9.20 11.08 8.29 8.43 8.04 Plagioclase 4.60 3.87 3.08 3.41 8.58 Muscovite 7.90 8.00 6.95 7.57 9.22 Chlorite 3.72 3.71 2.82 3.44 5.10 Smectite/Kaolinite 0.71 0.62 0.50 0.55 1.27 Amphibole/Pyroxene 0.02 0.031 0.01 0.01 0.01 Calcite/Carbonates 4.03 3.85 3.45 3.93 5.13 Rhodochrosite 2.69 2.60 2.25 2.55 3.52 Siderite 0.57 0.27 0.26 0.33 1.62 Iron Oxide 0.94 0.99 0.85 0.80 1.07 Rutile/llmenite 0.18 0.16 0.14 0.19 0.24 Apatite 0.14 0.11 0.07 0.09 0.32 Epidote 0.03 0.03 0.03 0.03 0.02 Rhodonite 0.18 0.25 0.17 0.14 0.10 Barite 1.29 0.621 1.25 1.34 2.35 Other 0.44 0.321 0.34 0.36 0.81 Liberation of Key Sulphides The liberation of galena, chalcopyrite, sphalerite and tetrahedrite for the Master Composite are presented in Table 4. Galena and sphalerite are well liberated. Chalcopyrite and tetrahedrite show higher amounts of middlings. Chalcopyrite middlings are associated with tetrahedrite, sphalerite, pyrite, arsenopyrite and gangue. Sphalerite middlings are associated with galena, pyrite, and gangue. Tables 5 through 8 present the liberation of the main sulfides by size fraction. The image grids presenting the particle maps sorted by their degree of liberation (liberated/middling/locked/complex/barren) and by size fraction are presented in Figure Al. Page 4 of 15