Confirmed Extension of Mbe Sub-Surface Gold System

Oriole Resources PLC (AIM: ORR), the AIM quoted gold exploration company focused on West and Central Africa, is pleased to report further positive drilling results for its 90%[1] owned Mbe orogenic gold project ('Mbe' or the 'Project') in Cameroon.

Highlights

• Results from holes MBDD014 to MBDD017 have returned multiple gold ('Au') mineralised intersections from maiden ('Phase 1') drilling at the MB01-S target.
• Results include 1.10m at 9.35g/t Au, 2.20m at 2.47g/t Au and 3.00m at 1.59g/t Au (using a 0.20 g/t Au lower cut-off grade; see Figures 1 & 2 and Table 1 below).
• The strike length of sub-surface mineralisation has been increased to at least 300m, underpinning the maiden Exploration Target published earlier this month. The system remains open in all directions and at depth.
• Following a review of the Exploration Target geostatistical data, the fully-funded Phase 1 drilling programme at MB01-S has been expanded to 7,050m in 25 holes. A total of 5,580.50m has been drilled to date, with 18 holes (MBDD001-018) completed and a nineteenth hole (MBDD019) is nearing completion.
• Following completion of the maiden drilling programme, the Company anticipates publishing an independent consultant's maiden, pit-constrained Mineral Resource Estimate ('MRE') for MB01-S in Q4-2025.

Commenting, Chief Executive Officer of Oriole Resources, Martin Rosser, said: "The latest set of drilling results continues to support our expectation, based on the recently publish JORC exploration target, of defining a resource of considerable scale at MB01-S. We now have delineated a substantial gold system which, importantly, remains open in all directions and at depth and we look forward to reporting the maiden MRE in Q4-2025."

Figure 1. Interpretative cross section for fence line N872782 with gold assay results from holes MBDD014 - MBDD017. Hole MBDD019 is in progress.

A Phase 1 diamond drilling programme commenced at MB01-S in late November 2024. A total of 5,580.50m has been drilled to date, with 18 holes (MBDD001-018) completed and a nineteenth hole (MBDD019) nearing completion.

The Company today reports results for holes MBDD014 to MBDD017, all drilled towards the west (270˚) on fence line N872782 that is located 100m to the north of fence line N872682 (holes MBDD003-006). Results have delivered 58 further mineralised intersections, including 1.10m at 9.35g/t Au, 2.20m at 2.47g/t Au and 3.00m at 1.59g/t Au (Table 1, Figure 2), bringing the running total to over 250 gold bearing intersections which equates to a discovery rate of over one intersection per 19m. A review of the QAQC samples has confirmed that the data falls within acceptable limits of error except for one blank that returned very low levels of gold and remedial action for this blank sample is underway.

Figure 2. Updated plan for Phase 1 drilling at MB01-S with a selection of best results to date from MBDD001 to MBDD017, and the holes reported today in blue boxes. Green dots denote holes drilled/planned towards 090 degrees (from Grid North) and blue dots are those drilled towards 270 degrees. Drilling fence line numbers are in blue text.

Importantly, this drilling fence line was not covered by the 2024 trenching campaigns and so has provided greater data resolution over this part of system. The results have extended the strike length of sub-surface mineralisation at MB01-S to 300m, underpinning the recently published Exploration Target. Drilling results to date have also confirmed that the system at MB01-S is up to 400m wide and has a vertical depth of at least 290m; it remains open in all directions and at depth.

Table 1. Calculated intersections from Phase 1 holes MBDD014-017, using a 0.20g/t Au lower cut-off grade. Results greater than 1.00g/t Au are in bold and 'including' intervals are in bold italics.

* Intersections greater than 1.00m, calculated using a 0.20g/t Au lower cut-off grade and no more than 5.00m consecutive internal dilution or 35% total internal dilution. True widths are not currently known.

The lithologies encountered in these holes correlate well with those seen in previously reported holes, and the style of mineralisation is consistent with the rest of the Mbe deposit. Gold mainly occurs in steeply NE-dipping smoky quartz veins (bearing tellurides and pyrite) hosted by quartz feldspar porphyry (QFP) units.

A review of the Exploration Target variogram published earlier this month, has led to an expansion of the Phase 1 drilling programme at MB01-S to 7,050m in 25 holes. A number of the remaining holes have been relocated (new positions are shown in Fig. 2) to focus on identifying additional mineralised material that currently falls outside of the model, in particular to target the western soil 1,000ppb Au soil anomaly contour shown in Figure 2.

Following completion of the Phase 1 drilling programme, the Company anticipates publishing an independent consultant's maiden, pit-constrained MRE for MB01-S in Q4-2025 and believes that the Project could be mined by open pit methods.

Glossary and Abbreviations

After highly encouraging results from infill soil sampling, rock-chip sampling, and trench sampling, a fully funded maiden drilling programme commenced at the MB01-S target in late November 2024 and is planned for 7,050m in 25 holes. BCM International has acquired an initial 10% interest in Mbe and is earning up to a further 40% interest by spending up to US$4 million on exploration.

An Exploration Target[2] range of 33 to 44 million tonnes at 0.77 to 0.95g/t A for 0.82Moz to 1.34Moz contained Au was published in July 2025 based on diamond drilling results from holes MBDD001 to MBDD013 at MB01-S, as well as trenching data, and the interpretation of geophysical and geochemical anomaly maps from both MB01-N and MB01-S. The Exploration Target remains open in all directions and at depth and it is anticipated that it will be succeeded by a maiden MRE in Q4 2025, following completion of the Phase 1 drilling programme later this quarter.