The South African gold producer HARMONY GOLD is to launch a takeover bid worth 8.1 billion dollars for its compatriot GOLD FIELDS, which will give rise to the world number one in the sector, with annual production of around 7.5 million ounces. The Russian NORISLK NICKEL, the largest shareholder in GOLD FIELDS, has announced its "irrevocable commitment" to accept the offer for its stake, some 20.02% of the capital of GOLD FIELDS.