Tertiary Minerals plc has announced a major silver–copper discovery at its Mushima North Project in Zambia, delivering the strongest results recorded at the project to date.
The standout drill intersection returned 97 metres at 85 g/t silver equivalent, including a high-grade interval of 13 metres at 1.46% copper, equivalent to 2.80% copper equivalent. This result significantly upgrades the scale and quality of mineralisation identified so far.
Mineralisation at Target A1 now defines a substantial footprint measuring approximately 450 metres by 400 metres and remains open to the northwest, south/southeast and at depth. Importantly, the mineralisation extends from near surface down to 103 metres, supporting the potential for both open-pit and underground development scenarios.
The company is currently finalising a JORC-compliant Exploration Target, with the objective of delivering a Maiden Mineral Resource Estimate by the end of 2026. These results materially strengthen the case for Mushima North as a significant emerging silver–copper system within Zambia’s well-established mining belt.
Richard Belcher, Managing Director of Tertiary Minerals plc, commented:
“We are delighted to report these results from the four holes of our Phase 3 drilling programme conducted at the start of the rainy season late last year. These results include our best intersection of silver-copper mineralisation to date on this project, with 97m at 85 g/t silver equivalent (1.42% copper equivalent) from only 6m depth. In addition, this also includes our best higher-grade copper intersection to date: 13m at 77 g/t silver and 1.46% copper (2.80% copper equivalent) from 84m downhole. These results have also further tested the depth extension of mineralisation, with our longest silver mineralisation intersect to date from 6m below surface to 103m depth (vertically).
“These results further support our bulk tonnage, open pit silver exploration model and the target area remains open to the northwest, south/southwest and at depth. These results will now be incorporated into the on-going JORC Exploration Target work to provide an estimation of the range of tonnages and grades for Target A1.
“The Exploration Target is planned to be released in the coming weeks and will form the basis of future planned programmes to commence at the start of the dry season this year and will support our aim of producing a Maiden Mineral Resource Estimate by the end of 2026.
“I look forward to updating shareholders on the Exploration Target in due course as well as providing updates on our wider exploration portfolio in Zambia and elsewhere.”
