Turquoise Hill Resources Ltd (acquired by Rio Tinto 2022 USD 3.3 billion takeprivate), Canadian/Mongolian Oyu Tolgoi coppergold operator, has faced sustained Mongolian Mineral Resources and Petroleum Authority enforcement scrutiny including the contested historic 2022 MongolianRio TintoTurquoise Hill USD 7+ billion Underground Block Cave dispute resolution and the contested takeprivate affecting Canadian institutional minority shareholders.