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WARSAW, Oct 7 (Reuters) - Polish miner KGHM is analysing two new copper deposits at its Sierra Gorda mine in Chile which could extend the mine's life by another 20 years, Poland's PAP news agency quoted the firm's Chief Executive Herbert Wirth as saying on Tuesday.
KGHM estimates the mine currently has enough reserves to last 23 years.
Sierra Gorda began operating on July 30. KGHM said the final cost of launching production at the new site reached $4.16 billion, over a third more than initially estimated.
Reporting by Wiktor Szary; Editing by Pravin Char