RE: RE: Pala in GHK, NCU and MLI take that last post to mean GHK's property. Yes that was one of the reasons for the mine shutdown (harder rock and more difficult processing).
NCU has a high grade IOCG (IRON ORE COPPER GOLD) type of deposit. Much easier to mine than porphyry with a top grade of concentrate, excellent metallurgy. Partial underground mining with the open pit strip ratio around 2.5 / 1.
Check geology etc on website. Check IOCG deposits in Wikipedia.