RE:RE:RE:RE:Newbies know nothingJetstream, you have some facts but you are missing others. Yes, you can get 100 to one concentrations from ore and that's what makes low grade profitable. SEA, your next door neighbour, is getting roughly 100 to one concentration from their ore processing according to their PFS so they get a high value concentrate they can ship to a smelter thousands of miles away.
In TUD's Technical Report, the ore concentrates only 60% , creating a concentrate grading just 2.7 grams of gold per tonne which is not shippable. The degree of concentration is limited by the refractory nature of the material. SEA concentrate is more than 60 grams of gold per tonne as I recall so it works even though the ore grade is low. Their ore is not refractory.
The new high grade discovered by TUD may be easier to concentrate...it may not be refractory. We don't know yet. But the multi-million ounce resource estimate reported so far IS refractory based on TUD's own Technical Report. Also, as previously stated, to get a resource estimate of the higher grade material at depth will require a ton of additional drilling and that takes big bucks.
I understand this is not what you want to hear.