Rio Tinto closes $4.4 billion financing deal for Oyu Tolgoi mine

[caption id="attachment_840789" align="aligncenter" width="600"] Oyu Tolgoi, a copper-gold mine in the South Gobi region of Mongolia, approximately 550 km south of the capital Ulaanbaatar, holds one of the largest undeveloped high-grade copper deposits in the world. (Image courtesy of Oyu...