
17.89% Zn, 6.41% Pb and 57 g/t Ag over 5.0 metres, including 32.1% Zn, 11.8% Pb and 105 g/t Ag over 1.9 metres
Minco Exploration PLC is pleased to announce further significant drilling results from its 100%-owned Rapla Project in County Laois. The Project is located within the Rathdowney Trend, which is host to the Lisheen and Galmoy Mines and the Ballywire Project. Results are reported for drilling completed since the announcement of the Rapla discovery on 19 December 2025 (drillhole 3312-82: 16.5m grading 10.99% Zn, 3.07% Pb, 1.39% Cu and 294 g/t Ag).
2026 Drilling Programme Extends High-Grade Mineralization at the Main, Aghmacart and Eastern Extension Zones
Main Zone
Aghmacart Zone
Eastern Extension Zone
Approximately 18,000m drilled since August 2025 – 28 holes completed and four in progress, with four rigs operating and permits in place for a further 38 holes.
“Seven months ago we reported one of the highest-grade drill holes seen in Ireland in decades. The drilling since then has demonstrated that hole 3312-82 was not an isolated result – every hole drilled in the Main Zone has intersected mineralization, with grades of up to 32% zinc in step-out drilling,” stated John Kearney, Chairman.
“With the Aghmacart Zone upgraded, a second mineralized horizon in the Lisduff Oolite, and sulphides now intersected more than a kilometre to the east, Rapla is emerging as a mineral system of significant scale,” stated John Clifford, Director – Exploration. “The programme for the second half of 2026 is designed to build on the results to date, test for a connection between the Main and Aghmacart zone and continue to test a growing mineralized footprint. We now have four rigs turning and permitting in place for more than 38 holes, with ten new Prospecting Licences granted along the Rathdowney Trend. Momentum at Rapla continues to build.”
A Proven Zinc District
The Rapla Project is situated within the mineral endowed Rathdowney Trend 15km northeast of the historically mined Lisheen deposit (22.2M tonnes grading 11.5% Zn, 1.9% Pb). The anticipated reopening of Galmoy mine (10.9M tonnes grading 12.4% Zn and 1.6% Pb), occurs 5km to the southwest of Rapla, and is being brought back into production by Shanoon Resources Limited. At Ballywire, 70km to the southwest along the Trend, Group Eleven Resources Corp. (TSXV:ZNG) is drilling a new discovery yielding high-grade massive sulphides over significant widths within a 6km by 2km prospective corridor.

Drilling Programme Update
Following the December 2025 discovery, Minco has continued systematic drilling of the 3.6km mineralized corridor, with four drill rigs currently operating. Since the programme commenced in August 2025, approximately 18,000m have been drilled in 32 holes (27 completed, one abandoned and four in progress). Drilling has focused on three areas: the Main Zone, which includes discovery hole 3312-82; the Aghmacart Zone, circa 200m to the north; and the Eastern Extension Zone, testing the mineralized system 1.0 to 1.25km east of the Main Zone.
Concurrent structural and stratigraphic studies have confirmed that the mineralization is spatially associated with a major fault system with displacements of 400-450m downthrowing to the north and have identified a sub-parallel structure (the “Northern Fault”), interpreted circa 800m to the north of the Main Zone, on which mineralized intercepts are located at its eastern and western extents and represents circa 2.5km of untested strike length. Compilation of historic analytical data further suggests that the footprint of the mineralizing system may extend significantly further east than previously interpreted, and the system remains open.

Also refer to table of 2025-2026 Rapla drill intersections, below.
Main Zone
Step-out drilling around discovery hole 3312-82 has intersected mineralization in every hole drilled to date in the Main Zone:
Drillhole 3312-100, 150m north-east of 3312-82, intersected narrow fracture- and vein-hosted mineralized intervals interpreted to reflect the eastern margin of the Main Zone.
Aghmacart Zone
A second mineralized area, the Aghmacart Zone, has been established circa 200m north of the Main Zone, where all four holes drilled to date have intersected zinc-lead mineralization:
The presence of copper with anomalous nickel and antimony in hole 3312-102 (including 0.4m grading 1.65% Cu) is interpreted to suggest proximity to a feeder structure that has yet to be identified. Drilling is commencing from a platform midway between the Main and Aghmacart zones to test for mineralization between the two zones.
Eastern Extension Zone
Wide-spaced drilling is on-going to confirm results from historic drilling along the interpreted eastern extension of the mineralized system, 1.0 to 1.25km east of the Main Zone.

Second Mineralized Horizon – Lisduff Oolite
Drillhole 3312-89 was extended to test the Lisduff Oolite, a second prospective horizon circa 200 metres below the base of the Waulsortian Limestone, and intersected 3.0m grading 6.65% Zn and 1.88% Pb. This intersection supports the geological interpretation that a second prospective horizon is present within the Rapla area.
Mineralogy and Critical Raw Materials
Mineralogical studies confirm that the upper part of the 3312-82 drillhole intersection is representative of classic stratabound Irish-type mineralization, closely resembling Lisheen- and Galmoy-style mineralization. The lower copper-silver intercept records a multi-stage hydrothermal system with a distinctive antimony-rich, silver-bearing tetrahedrite overprint. Research in collaboration with the Critical Minerals Challenge Centre (Camborne School of Mines / University of Exeter) is examining the gallium, germanium and indium contents of the mineralization and the amenability of the tetrahedrite to recovery by flotation. Copper, antimony, nickel, cobalt, arsenic, gallium and germanium are included on the European Union’s list of Critical Raw Materials as critical and/or strategic metals.

Photo of part of sulphide intercept in 3312-104 showing banded sphalerite. Part of an assay interval of 1.90m grading 32.08% Zn, 11.84% Pb, 105g/t Ag.
| Summary of Intersections – 2025-2026 Drilling Programme | ||||||||||||
| Hole ID | From (m) | To (m) | Length (m) | Zn % | Pb % | Cu % | Ag g/t | As % | Sb % | Co % | Ni % | |
| 3312-82 Main Zone |
576.50 | 593.00 | 16.50 | 10.99 | 3.07 | 1.39 | 295.6 | 0.74 | 0.56 | 0.05 | 0.12 | |
| incl | 576.50 | 581.00 | 4.50 | 8.99 | 1.49 | 0.00 | 10.5 | 0.22 | 0.00 | 0.00 | 0.00 | |
| incl | 577.00 | 580.00 | 3.00 | 12.56 | 1.95 | 0.00 | 14.5 | 0.30 | 0.00 | 0.01 | 0.00 | |
| incl | 583.50 | 593.00 | 9.50 | 14.68 | 4.61 | 2.41 | 508.4 | 1.18 | 0.98 | 0.09 | 0.21 | |
| incl | 584.00 | 592.00 | 8.00 | 17.03 | 5.47 | 2.80 | 595.1 | 1.37 | 1.14 | 0.10 | 0.25 | |
| incl | 588.00 | 592.50 | 4.50 | 19.45 | 8.18 | 5.05 | 1028.4 | 2.19 | 2.05 | 0.17 | 0.41 | |
| 600.00 | 611.00 | 11.00 | 2.20 | 0.64 | 0.16 | 18.8 | 0.07 | 0.02 | 0.00 | 0.01 | ||
| 3312-89 Main Zone |
603.00 | 625.00 | 22.00 | 1.89 | 0.21 | 0.14 | 6.2 | 0.09 | 0.03 | 0.00 | 0.00 | |
| incl | 605.00 | 611.00 | 6.00 | 3.01 | 0.53 | 0.02 | 3.0 | 0.10 | 0.01 | 0.01 | 0.01 | |
| incl | 619.50 | 621.50 | 2.00 | 2.61 | 0.03 | 0.01 | 0.9 | 0.05 | 0.00 | 0.00 | 0.00 | |
| incl | 622.50 | 624.50 | 2.00 | 4.05 | 0.30 | 1.08 | 50.9 | 0.33 | 0.28 | 0.01 | 0.01 | |
| incl | 623.50 | 624.50 | 1.00 | 5.36 | 0.31 | 2.15 | 100.5 | 0.63 | 0.55 | 0.01 | 0.02 | |
| 827.00 | 830.00 | 3.00 | 6.65 | 1.88 | 0.03 | 14.2 | 0.13 | 0.03 | 0.00 | 0.00 | ||
| 3312-91 Aghmacart Zone |
576.78 | 579.53 | 2.75 | 9.60 | 4.44 | 0.02 | 38.3 | 0.14 | 0.00 | 0.01 | 0.02 | |
| incl | 577.42 | 579.53 | 2.11 | 12.10 | 5.56 | 0.02 | 49.7 | 0.18 | 0.00 | 0.01 | 0.03 | |
| 3312-94 Aghmacart Zone |
589.25 | 593.25 | 4.00 | 4.74 | 3.41 | 0.03 | 18.1 | 0.14 | 0.00 | 0.01 | 0.01 | |
| 3312-95 Main Zone |
575.60 | 587.50 | 11.90 | 4.98 | 0.67 | 0.00 | 1.3 | 0.15 | 0.00 | 0.01 | 0.01 | |
| incl | 577.80 | 581.50 | 3.70 | 7.11 | 0.72 | 0.00 | 2.3 | 0.26 | 0.00 | 0.01 | 0.01 | |
| incl | 585.00 | 587.00 | 2.00 | 9.00 | 1.81 | 0.01 | 0.8 | 0.14 | 0.00 | 0.01 | 0.02 | |
| 3312-97 Eastern Extension |
529.00 | 529.50 | 0.50 | 1.26 | 0.15 | 0.00 | 0.5 | 0.01 | 0.00 | 0.00 | 0.00 | |
| 535.00 | 535.50 | 0.50 | 1.46 | 0.17 | 0.00 | 0.5 | 0.01 | 0.00 | 0.00 | 0.00 | ||
| 572.50 | 573.00 | 0.50 | 1.17 | 0.15 | 0.00 | 0.5 | 0.01 | 0.00 | 0.00 | 0.00 | ||
| 574.50 | 575.05 | 0.55 | 3.50 | 0.43 | 0.00 | 0.5 | 0.05 | 0.00 | 0.00 | 0.00 | ||
| 609.50 | 610.00 | 0.50 | 1.15 | 0.01 | 0.00 | 0.5 | 0.02 | 0.00 | 0.00 | 0.00 | ||
| 622.50 | 623.00 | 0.50 | 1.71 | 0.45 | 0.00 | 1.0 | 0.01 | 0.00 | 0.00 | 0.00 | ||
| 640.50 | 641.00 | 0.50 | 1.51 | 0.11 | 0.00 | 0.5 | 0.02 | 0.00 | 0.00 | 0.00 | ||
| 3312-98 Aghmacart Zone |
584.00 | 589.50 | 5.50 | 2.24 | 0.17 | 0.00 | 0.9 | 0.04 | 0.00 | 0.00 | 0.00 | |
| incl | 586.00 | 586.50 | 0.50 | 9.66 | 0.84 | 0.01 | 0.5 | 0.01 | 0.00 | 0.00 | 0.00 | |
| 590.50 | 591.00 | 0.50 | 1.05 | 0.13 | 0.00 | 0.5 | 0.04 | 0.00 | 0.00 | 0.00 | ||
| 597.00 | 603.00 | 6.00 | 3.18 | 2.10 | 0.01 | 6.5 | 0.05 | 0.00 | 0.00 | 0.00 | ||
| incl | 599.50 | 602.50 | 3.00 | 5.19 | 4.18 | 0.02 | 12.3 | 0.07 | 0.01 | 0.00 | 0.01 | |
| incl | 601.00 | 602.00 | 1.00 | 6.43 | 11.22 | 0.04 | 30.0 | 0.10 | 0.01 | 0.00 | 0.00 | |
| 3312-99 Main Zone |
580.60 | 585.50 | 4.90 | 5.43 | 0.99 | 0.00 | 0.9 | 0.12 | 0.00 | 0.01 | 0.00 | |
| incl | 581.10 | 582.00 | 0.90 | 14.67 | 3.36 | 0.01 | 2.4 | 0.28 | 0.00 | 0.01 | 0.00 | |
| incl | 583.50 | 584.40 | 0.90 | 11.32 | 1.67 | 0.00 | 0.7 | 0.31 | 0.00 | 0.02 | 0.01 | |
| 587.50 | 588.50 | 1.00 | 0.82 | 0.06 | 0.00 | 0.5 | 0.03 | 0.00 | 0.00 | 0.01 | ||
| 589.50 | 590.00 | 0.50 | 1.50 | 0.03 | 0.00 | 0.5 | 0.03 | 0.00 | 0.00 | 0.02 | ||
| 608.00 | 609.00 | 1.00 | 1.04 | 0.00 | 0.00 | 0.5 | 0.00 | 0.00 | 0.00 | 0.00 | ||
| 609.50 | 610.00 | 0.50 | 1.91 | 0.06 | 0.00 | 3.0 | 0.00 | 0.00 | 0.00 | 0.00 | ||
| 614.50 | 615.00 | 0.50 | 2.13 | 0.68 | 0.01 | 4.0 | 0.01 | 0.00 | 0.00 | 0.00 | ||
| 3312-100 Main Zone |
607.50 | 609.50 | 2.00 | 1.29 | 0.13 | 0.00 | 0.5 | 0.01 | 0.00 | 0.00 | 0.00 | |
| 612.10 | 613.10 | 1.00 | 1.06 | 0.13 | 0.01 | 0.5 | 0.01 | 0.00 | 0.00 | 0.00 | ||
| 615.60 | 617.60 | 2.00 | 1.02 | 0.03 | 0.01 | 0.5 | 0.04 | 0.00 | 0.00 | 0.00 | ||
| 624.60 | 625.10 | 0.50 | 1.29 | 0.02 | 0.00 | 0.5 | 0.03 | 0.00 | 0.00 | 0.00 | ||
| 626.10 | 626.60 | 0.50 | 1.23 | 0.00 | 0.00 | 0.5 | 0.02 | 0.00 | 0.00 | 0.01 | ||
| 630.60 | 631.20 | 0.60 | 1.72 | 0.01 | 0.00 | 0.5 | 0.06 | 0.00 | 0.01 | 0.01 | ||
| 797.60 | 798.60 | 1.00 | 1.54 | 1.84 | 0.03 | 19.5 | 0.40 | 0.05 | 0.00 | 0.00 | ||
| 3312-102 Aghmacart Zone |
593.95 | 603.50 | 9.55 | 5.06 | 0.58 | 0.00 | 4.1 | 0.06 | 0.00 | 0.00 | 0.00 | |
| incl | 594.40 | 602.00 | 7.60 | 6.18 | 0.69 | 0.00 | 4.7 | 0.08 | 0.00 | 0.00 | 0.00 | |
| incl | 594.40 | 596.50 | 2.10 | 13.14 | 1.75 | 0.00 | 10.4 | 0.22 | 0.00 | 0.00 | 0.00 | |
| 607.00 | 613.00 | 6.00 | 5.45 | 2.58 | 0.15 | 27.8 | 0.11 | 0.03 | 0.01 | 0.02 | ||
| incl | 609.40 | 612.55 | 3.15 | 9.85 | 4.87 | 0.24 | 49.5 | 0.19 | 0.05 | 0.01 | 0.04 | |
| incl | 609.80 | 610.20 | 0.40 | 8.43 | 2.21 | 1.65 | 91.0 | 1.00 | 0.35 | 0.03 | 0.19 | |
| incl | 611.00 | 611.65 | 0.65 | 24.80 | 18.25 | 0.05 | 122.0 | 0.04 | 0.01 | 0.00 | 0.01 | |
| 3312-103 Main Zone |
568.50 | 569.50 | 1.00 | 1.17 | 0.12 | 0.00 | 0.5 | 0.01 | 0.01 | 0.00 | 0.00 | |
| 571.00 | 571.50 | 0.50 | 1.05 | 1.12 | 0.00 | 2.0 | 0.00 | 0.00 | 0.00 | 0.00 | ||
| 578.50 | 580.50 | 2.00 | 1.62 | 0.55 | 0.01 | 6.4 | 0.04 | 0.00 | 0.00 | 0.01 | ||
| 588.00 | 589.00 | 1.00 | 2.87 | 2.24 | 0.04 | 37.5 | 0.05 | 0.00 | 0.00 | 0.00 | ||
| 594.50 | 601.85 | 7.35 | 3.51 | 1.26 | 0.02 | 75.7 | 0.19 | 0.00 | 0.00 | 0.00 | ||
| incl | 598.00 | 601.05 | 3.05 | 6.25 | 1.58 | 0.03 | 84.0 | 0.28 | 0.00 | 0.00 | 0.00 | |
| incl | 599.85 | 600.35 | 0.50 | 12.55 | 3.08 | 0.05 | 168.0 | 0.60 | 0.00 | 0.01 | 0.00 | |
| 3312-104 Main Zone |
595.90 | 600.90 | 5.00 | 17.89 | 6.41 | 0.01 | 57.0 | 0.21 | 0.01 | 0.02 | 0.03 | |
| incl | 596.40 | 597.40 | 1.00 | 17.18 | 3.05 | 0.00 | 31.5 | 0.35 | 0.00 | 0.03 | 0.05 | |
| incl | 598.70 | 600.60 | 1.90 | 32.08 | 11.84 | 0.01 | 105.3 | 0.21 | 0.01 | 0.02 | 0.05 | |
| 3312-105 Eastern Extension |
588.00 | 590.00 | 2.00 | 2.40 | 0.29 | 0.00 | 1.3 | 0.01 | 0.00 | 0.00 | 0.00 | |
| 3312-106 Main Zone |
599.00 | 619.50 | 20.50 | 5.12 | 2.35 | 0.05 | 20.8 | 0.13 | 0.01 | 0.01 | 0.01 | |
| incl | 599.50 | 602.00 | 2.50 | 6.13 | 1.75 | 0.00 | 17.6 | 0.14 | 0.00 | 0.00 | 0.00 | |
| incl | 603.00 | 605.00 | 2.00 | 3.24 | 0.60 | 0.00 | 35.0 | 0.25 | 0.00 | 0.00 | 0.00 | |
| incl | 607.00 | 611.50 | 4.50 | 8.27 | 2.08 | 0.21 | 22.1 | 0.26 | 0.03 | 0.01 | 0.02 | |
| incl | 608.50 | 610.00 | 1.50 | 14.37 | 3.67 | 0.56 | 41.3 | 0.46 | 0.08 | 0.02 | 0.04 | |
| incl | 615.00 | 616.50 | 1.50 | 10.82 | 9.68 | 0.02 | 57.0 | 0.06 | 0.01 | 0.00 | 0.01 | |
| 3312-107 Main Zone |
586.50 | 603.50 | 17.00 | 8.34 | 2.48 | 0.82 | 113.90 | 0.47 | 0.18 | 0.02 | 0.07 | |
| incl | 588.00 | 589.50 | 1.50 | 15.13 | 3.46 | 0.00 | 8.67 | 0.14 | 0.00 | 0.00 | 0.00 | |
| incl | 591.50 | 598.50 | 7.00 | 14.98 | 4.54 | 1.47 | 237.50 | 0.86 | 0.29 | 0.04 | 0.13 | |
| incl | 596.50 | 598.50 | 2.00 | 22.60 | 11.30 | 5.12 | 593.75 | 2.06 | 0.99 | 0.08 | 0.38 | |
| incl | 598.00 | 598.50 | 0.50 | 8.95 | 9.15 | 10.85 | 852.00 | 5.49 | 1.81 | 0.19 | 1.24 | |
| 3312-108 Eastern Extension |
589.00 | 590.50 | 1.50 | 4.58 | 0.38 | 0.00 | 5.0 | 0.22 | 0.00 | 0.02 | 0.03 | |
Notes: Intervals are downhole lengths; true widths have not been determined. Further assays are awaited for holes 3312-107 and 3312-108. “incl” = including. Bolded intersections correspond to the results highlighted elsewhere in this release; shading distinguishes each drill hole; a horizontal rule marks the start of a separate intersection within the same hole.
Future Exploration
The current programme is continuing with four drill rigs operating and 38 drill holes permitted across the mineralized corridor. The programme for the second half of 2026 is being designed to include infill drilling between the Main and Aghmacart zones, together with “brownfield” drill testing of the Eastern Extension and other targets within the interpreted footprint of the mineralizing system.
In addition, ten new Prospecting Licences along the Rathdowney Trend to the south-west of Lisheen have been issued to Minco’s wholly-owned subsidiary, Westland Exploration Limited, and will be operated as part of the Rapla Project.
Historical Exploration
Rapla was discovered in the 1990s and has been previously explored by a series of operators.
The exploration programmes over four decades included soil geochemical sampling, ground and airborne geophysics and drilling of 83 holes (36,200m). The Prospecting Licences were surrendered by a previous operator in 2023.
The historical drilling across the area is widely spaced (170-700m, nominal 400 × 400m grid).
Significant intersections from the historical drilling were tabulated in the Company’s news release of 19 December 2025, which is available on the Company’s website.
Competent Person
Technical information in this news release has been approved by EurGeol John A Clifford PGeo, Director – Exploration of Minco Exploration PLC, and “Competent Person” as defined under the 2021 Pan-European Reporting Standard.
Sampling, Analytical Methods and QA/QC
All core drilled at Rapla is NQ (47.6mm) and is cut using a rock saw. Sampling is generally completed in 0.50 m intervals. The half-core samples are bagged, labelled and sealed at Minco’s core store facility in Kilclonagh, Co. Tipperary. Transport is via an accredited courier service and/or by BRG Limited staff to ALS Laboratories in Loughrea Co. Galway, Ireland.
Sample preparation at the ALS facility comprises fine crushing 70% < 2mm, riffle splitter, pulverise up to 250g 85% < 75um.
The primary analytical procedure adopted is ALS Protocol ME-ICPORE. This applies a strong oxidising digestion utilising HNO3 , KClO3, and HBr with aqua regia and ICP-AES finish.
Values reporting >1,500ppm Ag were re-analysed with 30gm sample subjected to fire assay and gravimetric finish as per the ALS Ag-GRA21 analytical protocol.
Trace multi-element analysis by sodium peroxide fusion and ICP-MS was also completed on selected mineralized samples from drill hole 3312-82 using the ALS ME-MS89 protocol. With this method, a prepared sample (0.2gm) is added to sodium peroxide flux, mixed well and then fused at 670°C. The resulting melt is cooled and then dissolved in 30% hydrochloric acid. This solution is analysed by inductively coupled plasma-mass spectrometry (ICP-MS), with results corrected for spectral or isotopic interference.
Other than paying for a professional analytical service, Minco has no relationship with ALS.
Quality Assurance/Quality Control (QA/QC) Information
Minco inserts certified reference materials (“CRMs” or “Standards”) as well as blank material, to its sample stream as part of its industry-standard QA/QC programme. The QC results have been reviewed by the Competent Person, who is satisfied that all the results are within acceptable parameters. The Competent Person has validated the sampling and chain of custody protocols used by Minco.
ABOUT MINCO EXPLORATION PLC
Minco Exploration PLC is a mineral exploration company that holds interests in Prospecting Licences in Ireland considered highly prospective for the discovery of zinc-lead mineralisation. Minco has interests in four projects located within the Irish Midlands Orefield that are operated by Minco or in joint venture with Boliden Tara Mines.
Minco’s primary focus is its 100% owned Rapla Project, which is located approximately 5 km and 15 km northeast of the past producing Galmoy Mine (10.9Mt @ 12.4% Zn, 1.6% Pb) and Lisheen Mine (22 Mt @ 11.5% Zn, 1.9% Pb), respectively, and lies within the Rathdowney Trend, a highly prospective corridor of mineralization which contains the Lisheen and Galmoy deposits and the Ballywire project.
Minco also holds (i) a 100% interest in the Slieve Dart prospecting licence block in County Galway; (ii) a 20% joint venture interest with Boliden (80%) on Licence 1440R (Tatestown), which lies immediately adjacent to Boliden’s large 130M tonne Tara zinc-lead mine at Navan; and (iii) a joint venture interest with Boliden on Licence 3373 (Kells), contiguous to the west of Licence 1440R, where Minco can earn up to a 75% interest.
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