The miner launched a multi-billion dollar project aimed at reducing sulphur dioxide emissions by 45% in Norilsk.

Revenue for the major global copper producer during the July-to-September period rose 17%.

Once submitted, the revised application will tack on around 12 months to the overall regulatory process.

The Quebrada Blanca 2 project would now cost between $8.6 billion and $8.8 billion, compared with an earlier estimate of $8 billion to $8.2 billion.

The world's biggest platinum miner by value produced 909,700 ounces of refined PGMs in the three months to Sept. 30.

Anglo expects to produce between 830,000 and 870,000 metric tons of copper this year, lowering a previous forecast of 840,000 to 930,000.

The extension comes despite recent concerns in Malaysia about radiation levels from raw material processing.