Within the inferred class, there are 35,000 tonnes grading 0.65 g/t gold appropriate for open pit mining (0.65 g/t cut-off) and 375,000 tonnes at 4.33 g/t gold for underground restoration (1.75 g/t cut-off). The overall inferred useful resource is 410,000 tonnes averaging 4.12 g/t gold for 55,000 contained ounces.
The earlier useful resource estimate was made in 2016 when a cut-off of 5 g/t gold was utilized. This 12 months’s replace with the decrease cut-offs resulted in decrease estimated grades in each the indicated and inferred classes. Nonetheless, the 2021 up to date elevated the estimated tonnages by 186% within the inferred portion and 593.4% within the indicated portion. The estimated in situ gold ounces additionally rose – 23.9% within the inferred portion and 290.1% within the indicated class.
The sources estimated within the Greywacke North deposit can be added to the up to date numbers for the North Lake deposit, an estimate for which is at present being compiled. When the North Lake useful resource estimate was made in 2020 utilizing a cut-off grade of 0.4 g/t, it contained 14.1 inferred tonnes grading 0.92 g/t gold for 417,000 contained ounces.
MAS has plans to construct a centralized mill to deal with North Lake ore blended with larger grade materials from the corporate’s different La Ronge gold belt deposits.
(This text first appeared within the Canadian Mining Journal)