I read the article too and there are (unfornately) a few points that are quite credible. A production decision is unlikely in this climate imo.

Look at how Teck is doing, Teck still has a forward P/E of 20 for 2014 (at USD 15,50) considering they would earn about CAD0,83 cents per share this year. In the most hopeful scenario, Teck would earn CAD1.88 in 2016! Thats less than half compared to 2011 (4.18 eps). Metal prices going up is absolutely essential to make this business more profitable. Currently it hardly is.

All we can do is ride out this climate. The negative NPV I cant verify, however I know the low copper price does not help. The most important thing as far as I am concerned is that management spends as less money as possible, an emission would disastrous at these levels. So money management is key and we might be ok in the long run. I rather not see any more acquisitions at the moment. I am actually quite curious what our NPV would be at these levels, anyone an idea?