Frank,
going by those comments from GBG that you just posted; GBG are virtually confirming they have at least a 3.5-4b t resource.-
"in excess of 40 years" x 35 mtpa IO product = at least 3.5 -4 b t of iron ore.
They know pretty much what's in Lodestone and under Karara. So do we, we're just waiting on them to say so!