Barrick Gold sells four US mines for $720 million

[caption id="attachment_838416" align="aligncenter" width="600"] The Bald Mountain open-pit gold mine is just one of the assets Barrick is unloading. (Image courtesy of Barrick Gold)[/caption] Canada’s Barrick Gold (TSX, NYSE:ABX), the world's biggest gold producer, is unloading four of its non-core Nevada...