I've noticed Tony Locantro seems to give a back-of-envelope valuation of $40m per moz (undeveloped) for goldies.
So if you used that as a rough guide, the market is currently assuming a resource of around 2 to 2.5 moz, which sounds about right for what they might reasonably have at this stage (ignoring the 'floating in space' intercepts which require much more work).
