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Rio Tinto's think-small test at Winu

Is small the new tier one in copper? That’s a question being asked by investors as Rio Tinto edges closer to a decision on whether to develop its smallest mine in decades, the Winu project in the remote Paterson Province of north-west Australia.

Rio Tinto's think-small test at Winu Rio Tinto's think-small test at Winu Rio Tinto's think-small test at Winu Rio Tinto's think-small test at Winu Rio Tinto's think-small test at Winu

Drilling at Winu in Western Australia's north-west

With an expected start-up output of 37,000 tonnes of copper a year and 51,000 ounces of gold, Winu will barely make a dent in the global metals market.