Only thing that is wrong with this,is the part about donner getting 50% in the end.Yes they will spend enough to exercise their option,but Xstrata met its obligation with the feasability study to earn back the 15% again.
http://www.aheadoftheherd.com/Newsletter/2010/DONNER%20XSTRATA%20MINE%20SHOWS%20INCREASED%20UPSIDE.htm