BBY estimates are 50-80 mts (open cut) valued at $39 mill
and 350-550 mts (underground) valued at $155 mill
N.B. this is for CWK's 42.5% equity so confirmation of this type of resource covers CWK's market cap. by about double (without South Vickery and Oaklands).
btw for longrunsthefox and verge - BBY value Oaklands at $25 mill. so Vickery is worth 6 X this, and Ferndale 8 X this !