Hi Woody51,
I suppose the 'mapping' could be also described as planning a 'treasure hunt'.
Just one other point to 'keep in mind' is that HGD already have 205Koz of JORC compliant gold resource at the southern end of Karangahake and in the Talisman mine.
They only need to double this level to provide an attractive option for mining production or an interested party to 'want a buy in'.
If you research the permit areas that HGD hold, I think you will agree that this seems to be a quite reasonable possibility.
Cheers
BP:)