10 times is probably being a tad over-optimistic sailorlion, I hope I am wrong but I reckon the tonnage may go up by a factor of two or three and the grade may improve 10-20%; so at best I would expect not much more than a four fold increase in TREE. Which is certainly more than ample to start planning a mine life of 10+ years; and don't forget this deposit is still open on at least two sides and at depth.
On a different tack, has anybody heard of, or seen Magnetic spirals ?