A US district judge is poised to approve Rio Tinto's $138.75m settlement related to its Oyu Tolgoi mine expansion in Mongolia. The lawsuit alleged that the Anglo-Australian mining company misled investors by hiding issues related to its $7bn underground expansion project, reported Reuters. In June, a preliminary settlement was reached with the shareholders of Montreal-based Turquoise Hill Resources, awaiting approval from US district judge Lewis Liman in Manhattan. At a recent hearing, Liman expressed h ...