Tertiary Minerals plc recorded the highest silver and copper grades to date, and extended mineralisation by 100 metres, at Mushima North in the iron-oxide-copper-gold region of Zambia.
UNKNOWN ZONE
“Thick near surface” mineralisation now reaches over an area measuring 450m long and up to 400m wide, while remaining open to the north-northwest, south-southeast and at depth.
The results are from a further three holes in phase II follow-up drilling at target A1, a large polymetallic, silver-copper-zinc prospect.
Assays include 58m at 49 g/t silver, 0.26% copper and 0.16% zinc from eight metres downhole.
The results include 20m at 86 g/t silver, 0.44% copper and 0.24% zinc from 46m downhole, with the same hole ending in mineralisation.
Tertiary said that the returns suggested “the presence of a previously unknown zone of high-grade copper mineralisation, which is open to the north”.
Phase II drilling comprised 1,116m of combined air core and reverse circulation which, along with phase I, takes the overall footprint drilled to 1,680m by 550m.
Managing director Richard Belcher added: “These results further support our bulk tonnage, open pit silver exploration model as well as the additional potential for copper and adds further credence to the significance of this discovery for the company.”
Target A1 lies 28km east of the historic Kalengwa copper-silver mine currently being redeveloped.