xmas bells are ringing, page-10

GS, I think you're right about the overburden holding a reasonable amount of Fe. In order for it to be cost neutral, its price needs to be high enough for it to cover the mining, processing and transportation to port costs. The only cost that has been calculated is the mining, so they obviously have estimated something per tonne for processing and transportation. Whatever they get for it, it will need to be well above the ~$7 per tonne mining cost, which I guess means it needs a reasonable level of Fe.