LTR - cost per Tonne to produce, page-28

Deleterious elements are not just about Fe. You may want to revisit my own posts on this thread around the types of deleterious elements, gangue, variability of ore etc and given the ore in the open pit sections is unlikely to be homogenous (given the width of each vien in the octopus tentacles and potential differences in cooling) the METs testing ore at different layers are critical IMO to ensure the process flowsheet works as planned and can achieve the stated DFS cost projections. Certainly in the underground sections, given width and compactness likely to be homogenous down there IMO but that is a guess.

Obviously, if producing most of your product from DMS/HMS (without not a significant reliance on floatation to achieve a 80% recovery rate, definitely can say minimal issues with the ore and METs. The more reliance on floatation that opens up questions on I) the coarseness of the ore and/or I.) potential to liberate the spodumene from the ore and hence need for ball milling to do so and/or iii.) deleterious elements need to be dealt with further down the process flowsheet.

There are a number of factors when looking at ore, which without repeating myself are provided in my posts on another thread, but might write something a little more detailed here later on.

All IMO