Australia’s Fortescue Metals Group has unveiled plans for a vast wind, solar and battery storage plant to decarbonise some of the nation’s largest mining operations.

Fortescue submitted proposals for a 5.4GW renewables plant and battery storage as large as 9.1GWh to supply clean power serving its Pilbara iron ore mining facilities in Western Australia.

It reckons 1.5 million tonnes of CO2 emissions would be avoided annually as a result of the project, which local reports said would cost about A$10bn ($7.2bn).