Okay, let's be optimistic:Area of the undrilled non-magnetic,...

Okay, let's be optimistic:

Area of the undrilled non-magnetic, gravity high = 700 x 400 metres (MGD 55 grades are sub-economic at those depths)
Thickness of mineralised zone = 50 metres
Average density of IOCG deposit mineralisation in the Gawler craton = 3.3
Total tonnage = 46 Mt

Depth to top is 800 metres
Deposit morphology (based on presented drill section) = flat-lying
Mine type = ?room and pillar (high cost)

My guess is that they will likely need an average grade of >2.5% Cu to make this economic

Any mention of whether they are getting high cps readings from a portable scintillometer?