Shipping data indicates a vessel carrying bauxite from Rio Tinto's Amrun mine in Australia has altered its course toward China, becoming entangled in the supply chain disruption caused by the Strait of Hormuz blockage. This development coincides with aluminium futures reaching their highest level in four years, underscoring mounting concerns over raw material availability for global metal production.
Supply Chain Disruption Widens
The maritime obstruction is now impacting shipments of key industrial inputs, not just finished metal exports. The Middle East accounts for approximately 9% of global aluminium output, but the region relies heavily on imported bauxite and alumina. Any interruption to shipping lanes can therefore rapidly constrict supply for these critical smelting operations.
According to data from Kpler, the vessel Alisios, laden with 79,000 tons of bauxite from the Amrun operation, was last tracked east of the Philippines after turning north toward China. Rio Tinto completed construction of the Amrun mine in 2018, positioning it as a long-term supplier for its Weipa operations. The company reported in January that Amrun had exceeded its nameplate capacity after a year of record production.
Gulf Smelters Halt Operations
The crisis is escalating swiftly. Aluminium Bahrain has suspended shipments and invoked force majeure, a contractual clause used during unforeseen events. Simultaneously, Norsk Hydro announced that the Qatalum facility in Qatar is shutting down, with a warning that a full restart could take six to twelve months.
Analyst Ben Ayre at Kpler noted that Gulf Cooperation Council smelters import roughly 680,000 tons of alumina monthly. However, current inventories within the Gulf stand at a mere 61,000 tons, offering minimal buffer if the shipping passage remains closed.
Market Reaction and Broader Context
Aluminium futures climbed to $3,544 per ton on Monday, marking the highest price since March 2022. Marex analyst Ed Meir highlighted particular concern in Europe, where the Gulf production stoppage coincides with the planned idling of the Mozal smelter in Mozambique by South32 from mid-March.
Rio Tinto is actively pursuing expansion in the Cape York region. The Kangwinan study, detailed last year, could potentially increase output from the Weipa Southern area by up to 20 million tonnes annually. Armando Torres, head of Pacific Operations Aluminium, previously described the project as a step toward securing supply for the company's Australian refineries and customers.
The direct financial impact on Rio Tinto remains uncertain. Ownership of the diverted vessels is unclear, and rather than being cancelled, many cargoes appear to be redirected to Asian markets. This shift suggests a potential realignment of global trade flows, with sales patterns adjusting before any significant volume loss occurs.
Rio Tinto operates an integrated aluminium supply chain, from bauxite mining at Weipa to alumina refining in Gladstone and smelters across Australia and New Zealand. The company is considering boosting output at Amrun. A prolonged closure of the Strait of Hormuz would severely test the group's ability to reroute sales across this extensive network.
