If they came over 50 m and drilled straight down they would be in the orebody all the way down and could drill for several hundred m and it would tell them nothing  about size. If they are over a hundred m and drilling back into orebody that will comfirm width. Both of these scenarios would be possible if they were infilling to calculate tonnages but not practical at this point. The only one that makes sense to me is that they are over a 100m trying to prove continuity or, as has been said, to find the orebody that it sheared off of.

K