The world's largest listed miner said iron ore production from mines it operates in Western Australia on a 100% basis was 68.1 million tonnes during the three months ended March 31.
The final rule lowers the permissible exposure limit of respirable crystalline silica to 50 micrograms per cubic meter of air for a full-shift exposure.
The company has an arrangement with Eight Capital, on behalf of a syndicate of underwriters, who have collectively agreed to purchase approximately 21.1 million common shares.