The deal, involves the sale of minority stakes in some of Rioâ??s mining assets and the issue of convertible bonds. It marks the biggest ever investment by China in a foreign company.
Chinalco will buy $7.2bn in convertible bonds, which will convert into Rio shares at a later date. That would increase its stake in Rio from 9 per cent to 18 per cent. The rest of the capital injection comes from the sale of minority stakes. The Chinese group will also set up a $1bn joint venture to develop other projects with Rio, with each committing $500m.
The deal comes less than a week after Jim Leng abruptly quit as chairman-designate of Rio following a disagreement with Tom Albanese, chief executive, over a deal with Chinalco.
Rio said it had reduced net debt by $6.5bn to $38.7bn at the end of last year. The companyâ??s need to pay down debts has driven the partnership with the Chinese state-owned company.
Mr Leng favoured a large rights issue as the solution to Rioâ??s debt problems.