Tertiary Minerals (LSE:TYM) has reported initial certified laboratory results from five reverse circulation drill holes completed as part of its Phase 4 programme at the Discovery Zone, Target A1, within the Mushima North Project in Zambia.

According to the company, the drilling confirmed thick, near-surface silver-copper-zinc mineralisation across the northern part of the target and provided further evidence of continuity within the mineralised zone.

The results are consistent with the company’s previously stated exploration target of between 15 million and 30 million tonnes.

Drilling identifies higher-grade zone at depth

The programme also identified a higher-grade silver-copper zone at depth.

Tertiary reported elevated concentrations of several other metals, including bismuth, cobalt and antimony. The potential economic contribution of these metals would depend on factors including their recoverability, which has not yet been established in the supplied information.

Additional assay results from the drilling programme remain pending.

Metallurgical testing underway ahead of resource work

Tertiary has submitted samples for metallurgical testing as it continues technical work at Mushima North.

The company is progressing towards preparation of a maiden mineral resource estimate for the project, with the outstanding assay results and metallurgical work expected to provide additional information for its evaluation.

Tertiary Minerals plc is a UK-based mineral exploration company focused on polymetallic deposits, including silver, copper and zinc.

Its Mushima North Project in Zambia is located within an Iron-Oxide-Copper-Gold belt and is being explored for near-surface polymetallic mineralisation.