Have a look at Atlas' existing north Pilbara resources if you...

Have a look at Atlas' existing north Pilbara resources if you want an analogue. That will give you a good guidance for expectations. I'd suggest Abydos is the most similar, although Corunna could be better because the initial results are very deep. Weigh that up against the extra haulage distance and you'll have a good 'helicopter view' of the possible economics.

Forget your 2Bt target. If it was bigger than Roy Hill BHP would have pegged it 40 years ago.