South32 Downgrades Manganese Production Following Cyclone Disruptions and Geopolitical Volatility

Diversified miner South32 cuts Australia manganese forecasts by 6% following Tropical Cyclone Narelle and warns of rising costs from Middle East conflict.

By: AXL Media

Published: Apr 22, 2026, 11:01 AM EDT

Source: The Northern Miner

Operational Impact of Tropical Cyclone Narelle

The primary driver for the production downgrade was the landfall of Tropical Cyclone Narelle in March. The extreme weather forced a temporary suspension of operations at the Gemco manganese mine in Australia’s Northern Territory. To ensure safety, South32 evacuated non-essential personnel from the site as heavy rainfall saturated the region. While the March quarter saw production of 589,000 wmt an improvement over the zero-output period a year ago when a primary concentrator was offline the cyclone-induced delays have fundamentally altered the volume expectations for the 2026 fiscal year.

Middle East Conflict and Global Supply Chain Risks

South32’s latest report highlights the growing connectivity between regional conflicts and mining overheads. The ongoing conflict in the Middle East has led to a surge in global freight rates, complicating the logistics of transporting bulk commodities. Furthermore, the firm noted an uptick in the price of essential raw material inputs. To combat these risks, South32 has implemented mitigation measures to shield its supply chains. While the company currently reports no immediate diesel fuel shortages, it remains on high alert, monitoring the situation to prevent operational stalls at its major hubs.

Cost Inflation at Alumina and Brazil Projects

The inflationary pressures stemming from the Middle East are expected to have a ripple effect across South32’s diverse portfolio. Specifically, the company flagged potential rises in operating unit costs at the Worsley Alumina project in Australia and its various alumina interests in Brazil. These operations are particularly sensitive to energy and logistics pricing. If the current geopolitical instability persists, the resulting cost inflation could compress margins, forcing the company to lean more heavily on its mitigation strategies to maintain profitability in the aluminum and bauxite sectors.