Ann: Quarterly Report - June 2010 , page-9

From reading the merger booklet I understand that the problem with Roseby is that it is a large but low-margin deposit that stands a roughly 30% chance of making a loss.

Kylylahti on the other hand is a much smaller but higher-margin deposit which was at the mercy of its large capex. Now that capex has dropped significantly (by over $100M) I think the revised DFS will be very positive.

As long as the copper price holds up long-term though, they should both be pretty profitable mines.