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Chinalco seen taking part in Rio rights issue-source

SYDNEY, July 1 (Reuters) - China's state-owned Chinalco is expected to participate in global miner Rio Tinto Ltd's RIO.AX $15.2 billion rights offer, a source briefed on the matter told Reuters on Wednesday.

Last month Rio walked away from a $19.5 billion cash injection from Chinalco and instead launched a rights offer and formed an iron ore joint venture with bigger rival BHP Billiton Ltd BHP.AX.

A Chinalco spokesman based in Australia declined comment.

The offer closes on Wednesday. ($1=A$1.25) (Reporting by Denny Thomas)

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