NorthIsle announces the positive results from a Preliminary Economic Assessment

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Reserves & Resources

North Island Mineral Resource

Mineral Resources:

Tonnes, ‘000 Grade  Contained Metal
Cu,
%
Au,
g/t
Mo,
%
Re,
ppm
Cu Eq,
%
Cu,
mm lb
Au,
koz 
Mo,
mm lb
Re,
Kg x 1000
Cu Eq,
mm lb
Au Eq,
koz
Red Dog
Indicated 54,490 0.22 0.31 0.004 0.46 264.3 543.1 4.8 554.8 1,092.8
Inferred 2,979 0.17 0.25 0.002 0.36 11.2 23.9 0.1 23.7 46.7
Hushamu
Indicated 472,854 0.20 0.23 0.008 0.35 0.40 2,084.9 3,496.7 83.4 165.5 4,180.7 8,234.7
Inferred 414,293 0.15 0.18 0.006 0.29 0.31 1,370.0 2,397.6 54.8 120.1 2,802.3 5,519.7
Total
Indicated 527,344 0.20 0.24 0.008 0.31 0.41 2,349.2 4,039.7 88.2 165.5 4,735.5 9,327.5
Inferred 417,272 0.15 0.18 0.006 0.29 0.31 1,381.2 2,421.6 54.9 120.1 2,826.0 5,566.5

Resources based on a 0.1% Cu cut-off grade. For Cu and Au eq., the commodity prices used are as follows: US$ 3.25/lb Cu, US$1,650/oz Au, US$10.00/lb Mo, US$1,256/kg Re. Assumed 100% recovery. Amounts may not total due to rounding.

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