Red Sea disruption threatens global mining supply chains

A prolonged disruption to maritime traffic around the Bab el-Mandeb Strait poses a significant risk to global mining supply chains, extending well beyond the energy sector. According to GEM Mining Consulting, such instability could raise costs and delay the delivery of critical industrial inputs, including sulfuric acid, explosives feedstock and battery materials. The Chile-based consultancy warns that the consequences for the resources sector may be more far-reaching than initially anticipated, as shipping disruptions propagate through freight rates, insurance premiums and inventory levels.

The assessment highlights that a 90-day interruption could impact between 38.9 million and 77.8 million tonnes of modelled commodity and input flows, with a central estimate of 61.1 million tonnes. Mine production potentially exposed to input delays ranges from 0.8 million to 13.8 million tonnes, while delayed demand is estimated between 12.6 million and 33.7 million tonnes. In terms of financial impact, the value-weighted price-pressure range is projected at 1.2% to 10.5%, with a central scenario of 3.4%. Associated cost premiums are estimated to range from $480 million to $2.48 billion, with the central case at $1.37 billion.

These estimates come as Yemen’s Iran-backed Houthi militants expand their control around the Bab al-Mandeb Strait, one of the world’s most critical maritime chokepoints. The group has recently seized the Greater and Lesser Hanish islands in the Red Sea, strengthening its position after earlier capturing the port of Mokha and strategic Perim Island. These advances have heightened concerns over the group’s capacity to disrupt maritime traffic, adding urgency to questions regarding how prolonged shipping issues could spread from energy markets into mining and other industrial supply chains.

Bab al-Mandeb serves as the southern gateway to the Red Sea, separating the Arabian Peninsula from Africa. It is a critical link between Asian, Middle Eastern and European markets, with roughly 10% of global maritime trade passing through the strait. The route has become even more significant for energy markets during the current Middle East conflict, as Saudi Arabia has redirected crude oil through the Red Sea amid disruptions at the Strait of Hormuz. While Houthi advances have already contributed to concerns over an oil supply crunch, GEM’s analysis suggests the impact on the resources sector will be driven by higher delivered costs, longer transit times and increased working-capital requirements rather than a broad global shortage of minerals.

GEM’s preliminary assessment covers 15 commodity and input families, identifying sulfur and sulfuric acid, ammonia and nitrates, phosphate and potash fertilizers, graphite and battery-material intermediates, petroleum products and LNG as particularly exposed markets. Their vulnerability reflects a combination of route dependence, limited short-term substitution options and their importance to industrial processes. For instance, sulfuric acid is an essential processing input for some mining operations, while ammonia and nitrates are key components in explosives supply chains. The effect of any disruption would not be uniform; an input representing a small share of global trade could still disrupt operations if it is continuously consumed, difficult to replace or held in limited inventories.

While ships can divert around southern Africa when the passage becomes unreliable, doing so extends voyages and vessel cycles, affecting insurance costs and the availability of containers and specialized vessels. GEM’s exposure heat map assesses commodity families across six factors, including route share, difficulty switching suppliers and inventory risk. Petroleum products, LNG, sulfuric acid, ammonia, reagents, graphite, battery intermediates, rare earths and equipment spares rank among the more vulnerable categories. In contrast, large bulk markets such as iron ore, metallurgical coal, bauxite and alumina appear less exposed in the initial screening, as alternative routes and deeper markets could absorb more of the disruption, although freight costs may still rise.

The consultancy notes that these estimates are scenario bands rather than forecasts, describing its P10, P50 and P90 figures as communication proxies that should not be interpreted as statistical quantiles until further assumptions are calibrated. The analysis suggests that mining companies may need to treat maritime chokepoints as an operating risk rather than simply a geopolitical issue. Companies are advised to map shipping routes for critical supplies, stress-test inventory coverage and determine which facilities would encounter constraints first under disruptions lasting 30, 90 or 180 days. Backup suppliers and logistics options could become particularly important for inputs with few substitutes. Governments could similarly incorporate strategic maritime routes into mineral-security planning through improved trade-flow transparency, customs and vessel-tracking data, and international maritime-security coordination. Separately, lower prices have encouraged some physical buying in China, with demand showing signs of recovery, according to traders.