Germanium, vanadium, gallium and antimony—four of the most strategically important technology metals in the world—are now emerging as the defining elements of Namibia’s Otavi Mountain Land.
Once known primarily for its copper-lead-zinc mines, the belt is being reinterpreted as a modern critical-minerals district where high-grade vanadates, semiconductor-grade germanium, gallium-rich oxide zones and exceptionally enriched antimony bodies occur together in a single geological province.
Golden Deeps now controls 440 square kilometres of this terrain, positioning the company at the centre of a revival driven not by base metals, but by the high-value elements that underpin global electronics, batteries and advanced manufacturing.
These four metals are all sold into specialised global markets characterised by extremely tight supply chains and premium pricing.
Germanium and gallium are typically sold as highly refined oxides or metal ingots to semiconductor manufacturers, fibre-optics producers and defence-technology suppliers under long-term offtake arrangements.
Vanadium is generally sold either as vanadium pentoxide (V₂O₅) flake to steelmakers for high-strength alloys or as refined electrolyte for vanadium redox-flow batteries.
Antimony, depending on grade and form, is marketed as antimony trioxide or antimony metal and serves flame-retardant manufacturers, battery producers, and speciality chemical processors. Because these metals trade in thin markets, high-grade concentrate streams—such as those emerging from Otavi—can command strong demand from refineries in Asia, Europe and North America.
Eight critical minerals have now been confirmed across the Otavi Mountain Land, placing the belt among Africa’s richest and most diverse technology-metals terrains. But among them, four stand out for their strategic global importance—and for the extraordinary grades recorded within Golden Deeps’ licences.
Germanium, vanadium, gallium and antimony are now defining the belt’s new identity, emerging from decades of under-exploration to position Otavi as one of the world’s most interesting critical-metals provinces.
Germanium and gallium, two of the rarest and highest-value technology metals on earth, are being discovered at levels unmatched in most African districts. The historic Tsumeb mine was once one of the world’s primary sources of both metals, supplying Western electronics industries throughout the 20th century. Golden Deeps is now recording similarly robust signatures at both Nosib and the Graceland Prospect.
At Nosib, drilling has logged gallium grades of up to 197 g/t Ga₂O₃ in oxide zones, as well as elevated germanium in deeper sulphide horizons.
At Graceland, the germanium results are even more dramatic, with surface samples above 200 g/t germanium and channel samples up to 201 g/t, confirming the presence of hot, metal-rich fluids feeding into carbonate traps—precisely the geological conditions that produced Tsumeb’s remarkable mineral systems.
In Africa, germanium is otherwise found mainly at the DRC’s Kipushi Mine, while gallium is strongest in Guinea’s bauxite fields and Morocco’s polymetallic belts. Otavi now joins this elite tier.
Vanadium has become one of the belt’s most commercially advanced critical minerals, anchored by Golden Deeps’ Abenab and Nosib deposits.
Abenab hosts a majority-Indicated Resource of 2.30 million tonnes at 1.11 per cent vanadium pentoxide equivalent, with metallurgical testwork demonstrating exceptionally high recovery rates—a rare and valuable advantage for vanadium projects.
Nosib adds further vanadium through its oxide zones, with intersections above 1% V₂O₅ confirming that high-grade vanadates extend across multiple horizons.
Across Africa, primary vanadium production is dominated by South Africa’s Bushveld Complex, with additional occurrences in Madagascar and Morocco. Otavi’s vanadium systems are unusual for their carbonate-hosted setting and their association with gallium, germanium and antimony.
Antimony completes the region’s four-metal signature and is emerging as one of its most consistent critical-mineral markers.
At Nosib, oxide zones have returned more than 480 g/t antimony. At Graceland, channel samples have delivered values exceeding 1,200 g/t—grades seldom found outside the historic high-grade antimony camps of South Africa’s Murchison Greenstone Belt.
This metal’s presence across multiple targets is significant: antimony is globally scarce, with demand rising due to its use in semiconductors, flame retardants and defence supply chains.
Otavi now ranks among the few African districts showing both grade and scale potential.
Golden Deeps has advanced several of these four-metal-bearing deposits to the resource or near-resource stage. Nosib carries a maiden resource exceeding 700,000 tonnes across Measured, Indicated and Inferred categories.
Abenab holds more than 2.30 million tonnes, mainly in the Indicated category.
Khusib Springs, while historically known for copper and silver, also contributes germanium and antimony within its sulphide systems, and has been remodelled to nearly 500,000 tonnes.
The Graceland Prospect remains Golden Deeps’ most exciting Tsumeb-type target, with drilling planned following an induced-polarisation survey designed to identify sulphide bodies beneath exceptionally enriched gossans.
Taken together, these deposits reinforce the Otavi Mountain Land as a modern critical-minerals district of global relevance.
Germanium, vanadium, gallium and antimony occur in high-grade, structurally and stratigraphically controlled systems that mirror the conditions which once made Tsumeb a world-leading supplier of strategic metals.
With multiple defined resources, discoveries underway, and a district-scale pipeline spanning oxide, sulphide, and carbonate-replacement systems, Golden Deeps is positioning Otavi at the forefront of Africa’s next technology-metals frontier.
