South32 Gemco Manganese Exports Resume After Cyclone Megan Recovery

South32

South32 Gemco manganese exports restarted as the Australian metal producer shipped its first ore cargo since early 2024 from the Northern Territory mine. The South32 Gemco manganese exports resumption follows extensive recovery operations after Cyclone Megan damaged the export wharf and flooded mine areas in March 2024, forcing a four-month suspension that disrupted global manganese supply chains and affected key customers including GFG Alliance's Tasmania ferromanganese plant.

Production Recovery Targets Pre-Cyclone Output Levels

South32 Gemco manganese exports began with the loading of 56,606 tonnes aboard the Singapore-flagged Stenia Colossus on May 19th, bound for Tianjin, China according to marine analytics firm Kpler. A second shipment of 54,078 tonnes will depart on the Panamanian-flagged Loch Crinan on May 28th, demonstrating operational momentum recovery. These initial shipments mark the end of a 15-month export hiatus that severely impacted Australian manganese supply to Asian steel markets.

Meanwhile, South32 plans production ramping at Gemco's 6 million tonne annual nameplate capacity facility throughout the 2025-26 financial year. The company achieved 5.9 million tonnes production in 2022-23, the last complete year before Cyclone Megan disrupted operations. Northern Territory government projections indicate 5 million tonnes expected production over the coming year, though South32 has not released official 2025-26 guidance.

Customer Supply Chain Disruptions Highlight Market Dependencies

However, the extended Gemco shutdown created severe supply chain disruptions for downstream customers dependent on Australian manganese ore. GFG Alliance's Liberty Bell Bay ferromanganese plant in Tasmania moved to limited operations on May 19th due to manganese ore supply shortages. This operational reduction demonstrates the critical importance of Gemco's production for regional ferromanganese manufacturing capabilities.

Therefore, the export resumption addresses urgent supply needs across Asia-Pacific steel and ferroalloy markets that experienced significant manganese ore shortages during Gemco's closure. Chinese steel mills particularly depend on Australian manganese imports for steel production, making Gemco's recovery essential for regional supply chain stability. The mine's strategic location in Northern Territory provides efficient shipping access to major Asian industrial centers.

Infrastructure Recovery Enables Full Operational Restart

Furthermore, South32 completed extensive infrastructure repairs including export wharf reconstruction and comprehensive mine dewatering operations during January-March 2025. These recovery investments ensure sustainable long-term operations while improving resilience against future extreme weather events. The company's commitment to full production restoration demonstrates confidence in manganese market fundamentals and customer demand recovery.

As a result, Gemco's operational restart strengthens Australia's position as a critical manganese supplier to global steel industries while reducing supply chain vulnerabilities exposed during the extended shutdown. The successful recovery operations establish operational precedents for managing extreme weather impacts on mining infrastructure. Market participants welcome the supply restoration as global steel production continues recovering from pandemic-related disruptions.

The Metalnomist Commentary

The resumption of South32's Gemco manganese exports illustrates both the vulnerability of critical mineral supply chains to extreme weather events and the interconnected nature of global steel production networks. The 15-month disruption's impact on downstream ferromanganese producers like Liberty Bell Bay demonstrates how single-mine shutdowns can cascade through entire industrial sectors, highlighting the need for greater supply chain diversification and resilience planning in critical minerals markets.