BUENOS AIRES, July 17 (Reuters) - Miner Vicuña Corp, a joint venture of Australia's BHP BHP.AS and Canada's Lundin Mining LUN.TO, on Thursday said it was extending the useful life of its Josemaria copper, gold and silver project in Argentina to 25 years from a prior level of 19 years.
It attributed the longer useful life to higher levels of exploitable resources.