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Tharisa has secured a major commercial milestone for its Karo Platinum project in Zimbabwe, with Karo Platinum Private Limited signing a binding concentrate purchase agreement with a subsidiary of Valterra Platinum for the offtake of PGM and base metal concentrate. The five-year purchase of concentrate agreement provides Karo Platinum with offtake certainty as the project advances towards first production on Zimbabwe’s Great Dyke.

The agreement follows closely after Karo Platinum secured a Special Mining Lease Agreement with the Zimbabwean government, providing the project with long-term security of tenure and fiscal certainty. Together, the two agreements remove key uncertainties around Karo’s development and strengthen the project’s pathway towards production and financing.

Valterra adds downstream processing partnership

Under the binding term sheet, Valterra will purchase PGM and base metal concentrate produced by Karo under customary industry terms for an initial five-year period. For Tharisa, securing a downstream processing partner represents an important step in demonstrating the commercial viability and bankability of Karo Platinum, one of the largest undeveloped PGM assets on the Great Dyke.

Tharisa CEO Phoevos Pouroulis described Valterra’s downstream processing footprint and industry standing as a strong fit for the project. “Securing a concentrate purchase agreement with a partner of Valterra's standing and high-quality downstream processing footprint is a significant milestone for Karo Platinum,” Pouroulis said. He added that the agreement provides offtake certainty, reflects the quality of the Karo asset and reinforces the partnership-led approach that has underpinned Tharisa’s development.

Valterra CEO Craig Miller said the agreement reflected the company’s confidence in the fundamentals of the PGM market and Tharisa’s ability to develop Karo within Zimbabwe’s highly mineralised Great Dyke. The deal will also contribute to Valterra’s third-party processing portfolio, he said.

Karo targets long-life PGM production

Karo Platinum is 85%-owned by Karo Mining Holdings, with the Government of Zimbabwe holding a 15% unencumbered free-carried interest through Generation Minerals. Tharisa owns 78.81% of Karo Mining Holdings.

The project has an open-pit Mineral Reserve of 2.1 Moz of PGMs on a four-element (4E) basis, alongside a Mineral Resource of 11.2 Moz. Potential underground mining could extend Karo’s operating life beyond 50 years, positioning the project as a potential long-term contributor to Zimbabwe’s PGM industry. The project is being developed in phases, with Phase 1 designed to produce 226 000 oz/y of PGMs and employ more than 1 000 people.

Partnership becomes central to Karo’s development

The Valterra agreement comes at a pivotal point in Karo’s development. The Special Mining Lease signed with Zimbabwe earlier this week secured an initial 25-year tenure covering 23 903 ha and established the fiscal and operational framework for the project.

More than $240 million has already been invested in Karo Platinum, with the latest offtake agreement adding another important component to the project's development framework. The combination of secure tenure, fiscal certainty and a committed downstream processing relationship provides Karo with greater visibility as Tharisa works towards first production.

For Tharisa, the agreement also demonstrates the increasingly partnership-driven nature of its growth strategy, linking Zimbabwean mineral resources with established downstream processing capacity. As Karo moves towards production, the Valterra relationship could become an important part of the project's operating model - connecting one of Africa’s major undeveloped PGM resources with established processing infrastructure and global markets.

Vox Markets’ analysis describes the agreement as an “important piece of the Karo development puzzle”, highlighting that having an established PGM processor as a committed downstream partner should strengthen the project's financing proposition. Africa Business Insight notes that Valterra operates the Unki operation in Zimbabwe, including a smelter, and that Unki is about 200 km from Karo. That gives the agreement a potentially significant logistical advantage because Karo's concentrate has an established downstream processing destination relatively close to the mine.