Canadian copper miner Turquoise Hill Resources Ltd. is invoking force majeure related to its Chinese contracts for metal shipments from its Mongolian mine, amid COVID-19 border restrictions, and ...

Rio Tinto said that it has entered into a binding agreement with Turquoise Hill Resources for an updated funding plan for the completion of the Oyu Tolgoi underground copper project in Mongolia.

Global miner Rio Tinto , on Wednesday sweetened its takeover proposal for the 49% of Canada's Turquoise Hill Resources it does not already own by $400 million to an all-cash $3.1 billion.

Canadian copper miner Turquoise Hill Resources Ltd. TRQ-T has reached a tentative agreement to sell itself to mega-miner Rio Tinto International Holdings Ltd. RIO-N, but a prominent minority ...