Rio Tinto and its joint venture partner Hancock Prospecting will invest $US1.6 billion to develop the Hope Downs 4 iron ore project and link it with existing rail, power and port infrastructure in the Pilbara.

Rio Tinto and its joint venture partner Hancock Prospecting will invest $US1.6 billion to develop the Hope Downs 4 iron ore project and link it with existing rail, power and port infrastructure in the Pilbara.