Corunna Downs is the complete opposite of high quality. The Reserve is 57%Fe with SiO2 6.0% and P 0.10%. Definitely low quality. McPhee Creek is only a margin better at 57.1%Fe.
Between them the additional 50Mt does not warrant a massive re-rate based on even the current US$70/t. The additional distance to port and capital expenditure required to bring these projects on line would not deliver anything like the returns your expecting. Expect them to be discounted well below that AGO currently gets from its standard fines.
AGO Price at posting:
2.3¢ Sentiment: None Disclosure: Not Held