2021-07-14_REVISION - M2012032 (4)

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MiSMIDTH Table 2: Elemental Analyses by ICP Size Fraction (µm) Measured Head Calculated Head +106 -106/+53 -53/+20 -20 Weight Distribution (%) 100 100 33.70 28.43 16.03 21.84 Al wt%l 3.63 3.49 3.08 2.62 2.90 5.70 Ba wt% 0.55 0.51 0.36 0.55 0.69 0.58 Ca wt% 1.68 1.66 1.65 1.46 1.65 1.95 Cu wt% 0.38 0.36 0.24 0.41 0.50 0.39 Fe wt% 3.59 4.20 3.62 4.02 4.45 5.13 K wt%1 1.71 1.52 1.38 1.14 1.26 2.41 Mg wt% 0.51 0.55 0.52 0.41 0.47 0.85 Mn wt% 1.09 1.12 1.23 1.00 1.03 1.18 Mo wt% nd 0.007 0.004 0.005 0.007 0.015 N a wt% 0.50 0.59 0.66 0.45 0.62 0.66 P wt% 0.07 0.08 0.08 0.05 0.08 0.14 Pb wt% 7.53 8.13 2.60 10.10 13.95 9.81 S wt% 4.27 4.28 2.87 5.21 5.93 4.04 Si wt% 25.40 26.42 29.60 26.90 24.10 22.60 Ti wt% 0.22 0.22 0.21 0.18 0.21 0.29 W wt% 0.00 0.01 0.00 0.01 0.01 0.01 Zn wt% 1.97 2.01 1.60 2.47 2.45 1.74 Zr wt% 0.02 0.01 0.01 0.01 0.02 0.00 Ag ppm 1040 1064 579 1180 1610 1260 As ppm 1840 1725 1470 1890 2205 1550 Cd ppm 133 143 124 165 179 119 Co PPMl 40 9 17 1 6 11 S b PPM1 13901 15071 9381 17901 2210 1500 Sr PPM1 2771 2841 2541 2781 3291 304 The minerals detected and their concentrations in each size fraction are presented in Table 3. The bulk mineralogy by XRD/CEC, as well as the reconciliation between the QEMSCAN calculated element assay and the measured ICP value are presented in Appendix A. It is noted that the swelling clay concentrations determined by CEC are higher than those determined by QEMSCAN. The CEC method will be more reliable to detect differences in swelling clay content. The FW-231 Stope sample exhibited the sticky behavior of a sample with higher swelling clay during preparation, indicating that the swelling clay determined by QEMSCAN is most likely low. The galena and sphalerite concentrations are higher than the Virginius Master Composite, Hanging Wall Variability Composite and Yellow Rose Blend Variability Composite analyzed previously. The mica and clay contents are lower in this Master Composite compared to the previous samples. Page 3 of 15