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Highest Grade Ag-Cu at Target A1, Mushima North
Tertiary Minerals plc has announced significant silver-copper mineralisation at its Mushima North Project in Zambia, with the highest grade intersection to date of 97m at 85 g/t silver equivalent, including 13m at 1.46% copper (2.80% copper equivalent). The mineralisation footprint at Target A1 spans 450m by 400m and remains open to the northwest, south/southeast, and at depth, with mineralisation extending from near surface to 103m. The company is finalising a JORC Exploration Target and aims to produce a Maiden Mineral Resource Estimate by the end of 2026. Disclaimer*
About this update from Tertiary Minerals Plc
[{"type":"text","content":"\n\n\n \n4 February 2026\nTertiary Minerals plc\n (\"Tertiary\" or the \"Company\")\n \nHighest grade silver-copper intersection to date at Target A1, Mushima North Project, Zambia: 97m at 85 g/t silver equivalent\nTertiary Minerals plc (AIM: TYM) is pleased to announce laboratory results for the four holes completed during the Phase 3 drilling programme at Target A1 at its Mushima North Project in Zambia (\"Mushima North\" or the \"Project\") prior to the programme being curtailed by the early start to the wet season. Preliminary results from portable X-Ray Fluorescence (\"pXRF\") analysis of drill samples were notified on 13 November 2025.\nThe laboratory analytical results indicate further high-grade silver and copper mineralisation in the north of Target A1, which has a mineralisation footprint of 450m by up to 400m wide area, and remains open to the northwest, south/southeast and at depth.\nMushima North is located in the prospective Iron-Oxide-Copper-Gold region of Zambia. Target A1 is a polymetallic, silver-copper-zinc prospect located 28km to the east of the historic Kalengwa copper-silver mine which is currently under redevelopment and is one of several targets to be evaluated at the Project.\n\n \n\n \nHighlights:\n \nØ Drill intersections include (downhole widths, true widths unknown):\no 97m at 56 g/t Ag, 0.43% Cu and 0.19% Zn (85 g/t Ag equivalent or 1.42% Cu equivalent) from 6m downhole (hole 25TMNRC-043). Including:\n§ 42m at 81 g/t Ag, 0.70% Cu and 0.24% Zn from 55m downhole, and\n§ 27m at 98 g/t Ag, 0.91% Cu and 0.25% Zn from 70m downhole, and\n§ 13m at 77 g/t Ag, 1.46% Cu and 0.23% Zn (168 g/t Ag equivalent or 2.80% Cu equivalent) from 84m downhole.\no 11m at 18 g/t Ag, 0.18% Cu and 0.20% Zn (32 g/t Ag equivalent or 0.54% Cu equivalent) from 20m downhole (hole 25TMNRC-044).\no 17m at 14 g/t Ag, 0.25% Cu and 0.41% Zn (36 g/t Ag equivalent or 0.60% Cu equivalent) from 51m downhole (hole 25TMNRC-044).\nØ Best copper drill intersection to date: 13m at 1.46% Cu (2.80% Cu equivalent) from 84m, with individual metre samples of up to 3.17% Cu (hole 25TMNRC-043).\nØ Silver mineralisation occurs over a 450m by 400m surface area and depth of mineralisation extended from 84m to 103m.\nØ Mineralisation footprint remains open to the northwest, south/southeast and at depth ...