The high grade zone is confined to a sub vertical pipe like...

The high grade zone is confined to a sub vertical pipe like shape surrounded by low grade copper.

What these recent holes have done is to hit the lower grade mineralisation and have missed the higher grade core.

The earlier resource estimtae would have filled in these previously undrilled zones and potentially expanded the attractive higher grade zone.

The lower grade results would now better define the higher grade zone as being smaller, thus a rerun now of the resource may reduce the resource grade as the shape is smaller. The high grade zone is restricted - that's always been know.

It will put pressure on further holes now as the high grade zone could be much smaller than it's expectations.