Some of the PMT elements re concentrators I've put in the...

Some of the PMT elements re concentrators I've put in the separate thread.

Another reference point for UG costs being ~A$70-75/t comes from PMT's UG estimate of C$68.7/t. If the is the rate of UG mined ore then the deeper extensions of Burmeister are most likely going to be more profitably mined using UG mining than a deep open pit. I suspect a modest thickness, gently sloping seam is highly amenable to UG mining because the mining with would greatly exceed the true width. A true width 20m seam may start to act like a 50m-100m wide seam when horizontal slices are considered.

If the UG ore is 1.4% with 70% recovery rates then 5.6t of ore is needed for one ton of SC5.5. If Burmeister were to have UG mining costs of US$52.2/t then the mining cost for spod would be ~US$293/t. Mining costs are frequently the highest cost item in the cost structure for hard rock mines.