This link was just provided by Gunshow on TS, page 22 shows how IHAD8, just grazed the margin of the gravity feature, current hole is going right into the core of the anomaly which generally produces significantly better results!!!
http://www.argoexploration.com.au/pdf/26_11_2010/ARGO%20AGM%202010%20PPT.pdf
Copper is economical at .6%, these grades are much higher!