we're missing something methinks

Why does Heron want in here. It can't be Copper Hill surely. This is shown to be uneconomic with current prices and grades. Is this a subtle "move over darlin" because they like the look of some other tenements outside the peripheral view?. Heron may have cash in hand, but sensible companies don't throw money around for nothing. They want a share of something here. What exactly is it? jwt