Mining giant Rio Tinto has agreed to invest up to $60 million on exploration in junior miner Antipa Minerals' Citadel gold and copper project in Western Australia.
Under the farm-in agreement between the two companies, Rio will progressively increase its stake in the joint venture up to 75 per cent interest.
The Citadel project is located 75 kilometres north of gold miner Newcrest Mining's Telfer mine in WA's Paterson province.
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