This is a great article that illustrates the risk involved with dealing with foreign countries in mining. Without going into details the company is seeking arbitration as it states the government illegally pushing to buy MCC 49% stake in the mine for $400 million.
With demand for copper being so high not only for China's One Belt One Road Initiative, as well as electric cars the loss of this stake would be incredible. The mins is one of the largest in the region and produces 530,000 tonnes of copper concentrate a year.
This highlights potential problems that arise when doing large international deals. It also hints at a reason producers are looking for projects in safe jurisdictions like Canada.