Orbminco is set to begin a 2,500m drilling program at Majestic North aimed at upgrading inferred resources, testing structural controls on high-grade gold, and probing for primary mineralisation beneath the deposit.
- 27-hole, 2,500m reverse circulation drilling program
- Targeting upgrade from inferred to indicated resources
- Testing four structural junctions controlling high-grade gold
- First direct test of primary basement mineralisation
- Results to inform updated resource and mining studies
Drilling Program Targets Resource Upgrade and Structural Controls
Orbminco Limited (ASX:OB1) is poised to kick off a 27-hole reverse circulation (RC) drilling program at its wholly owned Majestic North Gold Project in Western Australia’s Eastern Goldfields, scheduled for late May 2026. The campaign, spanning approximately 2,500 metres, aims to upgrade the existing inferred mineral resource to an indicated category within the shallow optimised pit shell, a move that could enhance both grade confidence and contained ounces ahead of development planning.
The program divides into two complementary streams: a 10-hole vertical infill targeting inferred resources for classification upgrade, and a 17-hole angled program designed to test four structural junctions interpreted as key controls on the higher-grade 2.4 g/t gold domain. This structural targeting represents a strategic pivot, as previous drilling has largely been vertical and has not directly intersected the steeply dipping east-west structures believed to channel gold-bearing fluids. The angled holes, drilled at 050 degrees azimuth and minus 60 degrees dip, mark the first direct test of these corridors, potentially extending the known high-grade domain along strike.
These efforts build on the company’s March 2026 resource update, which reported a total JORC (2012) Mineral Resource of 1.38 million tonnes at 1.14 g/t gold for roughly 50,400 contained ounces, including a higher-grade subset of 249,000 tonnes at 2.42 g/t gold for about 19,300 ounces. The structural model underpinning the program identifies four intersecting north-south and east-west corridors as permeability zones focusing mineralisation, a concept that, if validated, could materially inform future exploration and resource expansion strategies. The significance of this approach is underscored by the recent resource boost by 127 percent reported by Orbminco, highlighting the potential for further resource growth through targeted drilling.
Probing the Primary Gold Source Beneath Supergene Enrichment
Beyond resource infill and structural testing, the program includes a pivotal deeper hole (MNPRC017) designed to penetrate the Archean basement beneath the supergene-enriched horizons. To date, mineralisation at Majestic North is interpreted as predominantly supergene, with the current resource largely reflecting secondary enrichment processes. The deeper test aims to directly assess the presence of a primary mineralised source, a critical unknown that could dramatically alter the project's exploration upside if confirmed.
Drill samples will undergo a comprehensive 45-element geochemical analysis to identify pathfinder elements such as arsenic, antimony, and rare earth elements typically associated with primary gold systems. This geochemical fingerprinting will provide crucial context for understanding the basement geology and guiding subsequent exploration phases.
Budget, Timeline, and Forward-Looking Implications
Orbminco has budgeted approximately A$280,000 for the program, with drilling and rig support accounting for about A$200,000 and assaying plus onsite management the remainder. The campaign is expected to span roughly two weeks from rig mobilisation, with assay results anticipated from late July 2026. These results will feed into an updated Mineral Resource Estimate targeted for the second half of 2026 and support Stage 1 mining studies outlined in the company’s May development update.
The drilling program’s success in upgrading resource classification and validating structural controls could pave the way for accelerated project development. Moreover, any positive intersections from the basement test hole would mark a significant milestone, potentially unlocking a deeper primary gold source and informing future exploration targeting beneath the supergene system. This strategic step aligns with Orbminco’s broader ambition to bring Majestic North into production along the most direct pathway, complementing recent capital raises and resource enhancements documented in prior announcements such as the development update in May 2026.
Bottom Line?
The upcoming drilling at Majestic North could redefine resource confidence and reveal deeper gold sources, setting a crucial precedent for the project’s next growth phase.
Questions in the middle?
- Will the structural junction tests confirm extensions of the high-grade gold domain?
- Could the deeper basement hole reveal a primary mineralised source beneath the supergene enrichment?
- How will upgraded resource classifications impact the timing and economics of mining studies?