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Home News Copper

Windhoek sits on copper and a bit of gold

by Editor
October 8, 2025
in Copper
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The greater Windhoek copper belt hosts more than ten known copper deposits and prospects containing a combined total of over 140 million tonnes of ore and approximately 700,000 tonnes of contained copper metal, ranking it among Namibia’s most mineralised inland regions.

The principal deposits include Matchless, Otjihase, Omitiomire, Hope, and Gorob, supported by more minor but geologically related prospects such as Klein Aub, Seeis–Groot Aub, Kaanjoo, Esser Hook, Gocheganas–Dordabis, and Rehoboth–Aris.

The first discovery in the belt was made in 1850, when prospectors identified copper-bearing outcrops at Matchless, about 30 kilometres southwest of Windhoek. The deposit was mined intermittently for more than a century, with early production smelted on site and later railed to the coast for export.

Records from the Geological Survey of Namibia show that Matchless produced an estimated 30,000 tonnes of copper metal before operations ceased.

The mine’s sulphide ore contained mainly chalcopyrite and pyrrhotite hosted in amphibolite, characteristic of the Damara Orogenic Belt.

By the 1960s, attention shifted eastward toward Otjihase, near Seeis, where Tsumeb Corporation Limited (TCL) developed an underground mine accessed by declines and sublevels.

Ore production began in the mid-1970s and continued intermittently until the early 1980s, yielding several thousand tonnes of copper concentrate annually.

The mine was later reopened by Weatherly International plc, which operated Otjihase and Matchless as a single unit until 2015, when operations were suspended due to underground flooding and a decline in copper prices.

The two mines were subsequently acquired by Consolidated Copper Corp (CCC), which holds the assets under a restart study for modern mechanised operations.

Farther south near Rehoboth, the Hope and Gorob deposits mark the southern continuation of the same geological system.

Originally delineated by Gold Fields Namibia in the 1970s, they are now controlled by Bezant Resources through Hope and Gorob Mining (Pty) Ltd.

The deposits contain a combined 10.2 million tonnes grading 1.9% copper and 0.3 g/t gold, representing roughly 194,000 tonnes of contained copper.

The mineralisation is hosted in volcanic and sedimentary rocks of the Matchless Amphibolite Belt and exhibits volcanogenic massive sulphide (VMS) characteristics similar to those at Matchless and Otjihase.

To the northeast, the Omitiomire copper deposit, managed by Craton Mining and Exploration (Pty) Ltd, a subsidiary of Omico Mining Corp, forms the most significant single copper reserve in the central Namibian region.

The project’s 2024 Bankable Feasibility Study defined 102 million tonnes grading 0.51% copper, equivalent to 516,000 tonnes of contained copper metal, with potential for expansion through deeper exploration.

Omitiomire is planned as a large-scale open-pit operation employing heap leaching and solvent extraction–electrowinning (SX-EW) to produce refined copper cathode.

Smaller historical mines and prospects complete the Windhoek copper picture. The Klein Aub Mine, located approximately 90 kilometres south of the city, produced approximately 55,000 tonnes of copper between 1966 and 1987 from high-grade underground workings that averaged 2–3% Cu.

Other known occurrences include Seeis–Groot Aub, Kaanjoo, Esser Hook, Gocheganas–Dordabis, and Rehoboth–Aris, where surface sampling and shallow trenching have recorded grades ranging between 0.3 and 1.0% copper in schist and quartz–carbonate veins.

Collectively, when combining historical production with defined reserves and resources, the Windhoek copper belt has yielded and delineated over 700,000 tonnes of contained copper metal.

Cumulative ore inventories across the district now exceed 140 million tonnes, establishing the area as a significant inland copper province within the Damara Supergroup.

The mineralisation is predominantly sulphide-hosted in schist and amphibolite, with secondary enrichment in weathered zones forming visible malachite and azurite.

Infrastructure advantages have long favoured the district. The Windhoek basin is crossed by Namibia’s central east–west railway line, linking Gobabis and Walvis Bay, supplemented by paved highways, a grid power system, and water supply infrastructure.

This proximity to logistics centres allows exploration and mining companies to operate within short distances of processing and export routes.

Active exploration continues across the region. CCC is undertaking mine restart assessments at Matchless and Otjihase, Omico Mining is advancing feasibility work at Omitiomire, and Bezant is preparing development plans for Hope and Gorob.

Meanwhile, Namibian prospectors and junior licence holders continue surface work around Seeis, Kaanjoo, and Dordabis.

The Geological Survey of Namibia classifies the belt as one of the country’s most prospective zones for additional volcanogenic and shear-hosted copper deposits.

From the early workings of Matchless in the 19th century to modern feasibility studies at Omitiomire and Hope, the Khomas region’s geological record shows a consistent trend: copper mineralisation extends across more than 200 kilometres surrounding the capital.

The combined tonnages and grades confirm that Windhoek sits atop one of southern Africa’s oldest and most enduring copper provinces.

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