I have looked for the KSM recovery rates this in the past, and asked for help finding them, but no luck. The numbers in the early PEAs were in the sub 75% range. However, at some point SEA stopped publishing them, at least in an easy to way to determine.
The best I can work out is: that KSM wil produce 36 million oz gold from 47.3 million P&P reserves over 33 years. This back-of-the-enevelope calcuation is 76% of reserves. Please point to the official recovery numbers if youi know where they are published.
If KSM can be economic with such low recovery rates, low grades, and tunnel costs, Goldstorm is likely to have far superior economics. As a comparison, remember, with a 1.0 g/t cutoff, Goldstorm produces an indicated resource of over 15 million AuEq with an average grade of 1.48 g/t. And since the Goldstorm is still expanding to the N/NE with better grades, these numbers are likely to improve with this year's drilling.
It will be interesting to see the maiden PEA after this year's drilling on Goldstorm.