By Ian Walker

LONDON--Rio Tinto PLC (RIO.LN) said Tuesday it has appointed Alfredo Barrios as chief executive of its aluminum business, replacing Jacynthe Cote who is leaving for personal reasons to pursue other interests.

The international miner said Mr. Barrios, a 22-year veteran of BP PLC (BP), will join the firm on June 1.

Mr. Barrios' most recent role was executive director and executive vice president downstream at the joint venture TNK-BP, where he was responsible for the refining, trading, supply, logistics, and marketing businesses. He joined BP in 1992 and has held senior leadership roles in the U.K., U.S., Russia and continental Europe.

Mr. Barrios will be based in Montreal, subject to obtaining all necessary immigration approvals from the Canadian authorities.

Jacynthe Cote will continue in an advisory role until Sept. 1, to ensure a smooth transition, Rio Tinto said.

At 1310 GMT shares in London had fallen 19 pence, or 0.57%, at 3239 pence in a higher FTSE 100 Index--up 0.47%.

-Write to Ian Walker at ian.walker@wsj.com

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