Duluth Metals Announces An Updated Mineral Resource Estimate Confirming Large Increases To Twin Metals Contained Metal, Grade And Indicated Tonnage
Tables of the updated resource tons and grades for various cut-offs are shown below for each deposit. The base case (0.3% Cu cut-off) is highlighted. The remaining cases are included to show the sensitivity of the estimates to changes in cut-off grades:
Table 4 - MATURI DEPOSIT INDICATED AND INFERRED MINERAL RESOURCES
Maturi Deposit[3]
Indicated Mineral Resource[4]
Cu % Million Cu Ni Pt Pd Au TPM[5]
cut-off Tons % % ppm Ppm ppm ppm
0.2 1137 0.57 0.18 0.15 0.34 0.08 0.58
0.3 1065 0.59 0.19 0.16 0.36 0.09 0.60
0.4 936 0.63 0.20 0.17 0.38 0.09 0.64
0.5 739 0.67 0.21 0.19 0.42 0.10 0.70
0.6 538 0.72 0.23 0.20 0.45 0.11 0.76
Inferred Mineral Resource
Cu % Million Cu Ni Pt Pd Au TPM
cut-off Tons % % ppm Ppm ppm ppm
0.2 782 0.43 0.14 0.12 0.27 0.06 0.44
0.3 542 0.51 0.17 0.14 0.32 0.07 0.53
0.4 383 0.57 0.19 0.16 0.38 0.08 0.62
0.5 256 0.63 0.20 0.20 0.44 0.10 0.74
0.6 141 0.70 0.22 0.24 0.53 0.12 0.88
Table 5 - BIRCH LAKE DEPOSIT INDICATED AND INFERRED MINERAL RESOURCES
Birch Lake Deposit
Indicated Mineral Resource
Cu % Million Cu Ni Pt Pd Au TPM
cut-off Tons % % ppm Ppm ppm ppm
0.2 111.9 0.49 0.15 0.22 0.48 0.11 0.80
0.3 99.7 0.52 0.16 0.23 0.51 0.11 0.86
0.4 85.4 0.55 0.17 0.25 0.54 0.12 0.91
0.5 54.9 0.60 0.18 0.27 0.59 0.13 0.99
0.6 22.8 0.67 0.21 0.29 0.63 0.14 1.06
Inferred Mineral Resource
Cu % Million Cu Ni Pt Pd Au TPM
cut-off Tons % % ppm Ppm ppm ppm
0.2 313.1 0.41 0.13 0.16 0.32 0.08 0.55
0.3 239.2 0.46 0.15 0.18 0.37 0.09 0.64
0.4 158.4 0.51 0.16 0.20 0.42 0.10 0.72
0.5 76.8 0.58 0.18 0.23 0.48 0.11 0.82
0.6 23.5 0.66 0.20 0.27 0.57 0.13 0.97
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