Tertiary Minerals PLC has reported progress in its Phase 3 drilling at Target A1, part of the Mushima North project in Zambia, where it has so far completed four reverse circulation holes for a total of 481 metres.
Field activities were, however, paused earlier than expected amid heavy rains.
Tertiary told investors that preliminary pXRF work indicated broad copper intervals, including a best intercept of 95m at 0.41% copper from 10m downhole.
“Whilst the pause of the planned drill programme due to the onset of heavy rains earlier than anticipated is frustrating, the preliminary results from the first few holes are extremely encouraging, have extended the area of known mineralisation in the north and at depth, and support our current exploration model,” said managing director Richard Belcher.
He added that additional activities originally scheduled for 2026 would now be brought forward.
The company recorded visible secondary copper mineralisation and high indicative silver values of up to 246g/t, consistent with previous pXRF work. Belcher said these findings would underpin the next phase of technical studies, noting:
“These programmes include the JORC Exploration Target work, which will provide valuable guidance on the resource potential of Target A1 in terms of a range of tonnages and grades, as well as further mineralogical studies to better understand the mineralisation and deportment of the metals of interest.”
Fieldwork will resume after the rainy season, with a further drill campaign planned for the start of the dry period.
