HomeNewsBusinessChina’s massive African mine threatens to upend iron ore market

China’s massive African mine threatens to upend iron ore market

The scale of Simandou is staggering. It’s the world’s largest untapped iron ore deposit, with estimated reserves of at least 3 billion tons

November 03, 2025 / 11:53 IST
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China, China news, China latest news, Iron ore
The size and richness of the deposit means the start up at Simandou threatens to further tilt the power dynamics in a market already facing an uncertain demand future, and at a time when the top buyer, China, is pushing for greater influence over the world’s most-traded commodity after oi

In April 1998, a young geologist and his team set out from the village of Moribadou and trekked for six hours through the Guinea Highlands, a densely forested plateau that spreads across four countries in West Africa. “It was extremely difficult,” said Sidiki Koné. “In front was forest. It was forest to the left and forest to the right. Behind it was the same thing. And I said ‘how is this work possible?’”

Koné was mapping and drilling for his employer Rio Tinto Group, one of the largest mining companies. It had recently confirmed the presence of vast quantities of iron ore — the raw material for manufacturing steel. The Simandou deposit, buried below one of the world’s most biologically rich ecosystems, was first explored in the 1950s when Guinea was still a French colony. It would turn out to be one of the biggest on the planet.

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The remoteness of the iron-rich mountains that daunted Koné — combined with military coups, corruption scandals and corporate intrigue — helped keep Simandou’s valuable trove in the ground for almost three decades. Yet, a brand-new railway last month began carrying ore to a purpose-built port, from where it will be dispatched to China’s steelmaking furnaces some time before the end of this year.

The scale of Simandou is staggering. It’s the world’s largest untapped iron ore deposit, with estimated reserves of at least 3 billion tons. Rio’s plan involves blasting ore — with an iron content among the highest on Earth — from an 8-kilometer (5-mile) long sliver of mountain ridge, before moving to a second site once the first is depleted. At $23 billion, it’s Africa’s biggest ever mining project and could make Guinea the continent’s No. 2 exporter of minerals and metals by value.