BUENOS AIRES, July 17 (Reuters) - Miner Vicuña Corp, a
joint venture of Australia's BHP and Canada's Lundin
Mining ( LUNMF ), 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.