Taking a conservative approach, I'm assuming they stopped...

Taking a conservative approach, I'm assuming they stopped relatively shallow because they weren't seeing any more mineralisation. On that basis I'm looking for a relatively shallow, possibly smaller scale but exploitable sulphide resource. I'd take something that was relatively cheap to get up and might fund the company for 5+ years.

But maybe they've got evidence that what they've hit is a direct pointer to a deeper, larger system? In which case maybe the geos thought better to conserve some drilling capital to get underneath with a well prepared campaign?