Alcoa's US$5.6 Billion South32 Deal Hands It Worsley's Coal Phase-Out by 2031
Alcoa will take over South32's controlling interest in the Worsley alumina refinery and the integrated Boddington bauxite mine in Western Australia under a global transaction worth up to US$5.6 billion (AU$8.1 billion), according to IEEFA.
The transfer reshapes Alcoa's position across the Australian supply chain. Subject to shareholder and regulator approval, its approximate share of Australian bauxite production rises from 30% to 50%, and its alumina share from 40% to 60%, together with control of all related interests in Western Australia, IEEFA reported.
With those assets comes an energy problem that South32 has been carrying. Coal supplies 40% of the energy mix at Worsley, a site that draws minimal grid electricity, according to IEEFA.
That fuel profile puts the refinery seventh on the emissions ranking under Australia's Safeguard Mechanism, which covers Scope 1 emissions only, at 3.2 million tonnes of CO2 equivalent a year, IEEFA said. The coal must be gone by 2031, matching Western Australia's revised coal exit date.
Compliance has already required paper offsets rather than physical abatement. South32 surrendered more than 130,000 combined offsets and credits to meet Worsley's FY2024-25 Safeguard baseline, according to IEEFA.
Industry analyst Wood Mackenzie said the transaction "removes a significant decarbonisation burden" for South32. The obligation does not disappear with the change of owner; it moves onto Alcoa's balance sheet, alongside the enlarged bauxite and alumina positions it is buying.
Source: ieefa.org (opens in a new tab)1 sourcePermalink