My guess is that the 1000m hole was as much about seeing what the entire CORE showed rather than just the gold intercepts.
We know that they believe that the BG area is a combination of several geological events that are somehow intermingled amongst each other. knowing where they intersect and how could give them much better idea of how the gold got there and from whence it came.
Brian Maher talks about interpreting the results before publishing. Iam certain that there's much more to this than reporting a 1-5 m gold intercept or 2.
Plus as I've said before ... too much info too early might just be detrimental to our wealth.