Redcastle Resources Advances Queen Alexandra with Strong Drilling and Expanded Grade Control

Queen Alexandra Drilling Confirms Robust Mineralisation Beyond Current Pit

Redcastle Resources (ASX:RC1) has reinforced Queen Alexandra’s role as a cornerstone asset in its Eastern Goldfields portfolio with new infill drilling results that extend mineralisation beyond and below the 2025 conceptual pit. Notably, drillhole BMRC410 intersected 4 metres grading 12.3 g/t gold from 32 metres, including a standout 1 metre at 29.4 g/t Au. Another key intercept, BMRC425, returned 7 metres at 2.08 g/t Au from 49 metres, confirming deeper continuity and supporting flexibility in early mine sequencing.

The results are part of a 25-hole, approximately 2,800-metre infill program targeting geological confidence within and around the current pit envelope. With assays received for 16 holes covering 1,120 metres, these outcomes bolster confidence in Queen Alexandra’s near-term development potential while highlighting scope for resource expansion.

Expanding Grade Control Drilling to Sharpen Mine Planning

Building on these encouraging infill results, Redcastle plans a significant grade control drilling campaign exceeding 8,000 metres, comprising roughly 260 holes. This program aims to enhance ore-waste delineation within the starter pit area, underpinning more precise mine planning and operational scheduling. The expanded drilling is poised to commence shortly, subject to final approvals.

Such a capital-disciplined approach aligns with Redcastle’s broader strategy to advance production through toll treatment under the Redcastle–BML Joint Venture, optimising infrastructure and managing upfront costs.

Corridor-Scale Potential Highlighted by Morgan’s Castle East Assays

The Queen Alexandra deposit sits within a roughly 1.7-kilometre east-west mineralised corridor that includes Redcastle Reef and Morgan’s Castle East (MCE). Recent 1-metre split assays at MCE have identified higher-grade zones within a broader low-grade envelope, including a remarkable 1 metre at 15.1 g/t Au from 14 metres. These findings support earlier indications of a broad gold system at MCE and refine geological understanding of the corridor’s eastern extent.

This corridor-scale opportunity offers potential for integrated regional development, with shared infrastructure and staged mining concepts providing avenues for mine life extension and operational efficiencies. The proximity of MCE to planned mining at Redcastle Reef, just 450 metres away, underscores its strategic relevance.

These developments build on prior drilling successes such as the high-grade gold extending Redcastle Reef westward that revealed a 300-metre strike extension, further supporting the concept of a coherent mineralised corridor.

Technical Rigor and Ongoing Geological Modelling

Redcastle’s drilling employs industry-standard reverse circulation techniques with rigorous QA/QC protocols, including certified reference materials and blanks, ensuring assay reliability. While the gold mineralisation exhibits a nuggety style typical of Archaean greenstone-hosted deposits, the data collected supports ongoing geological modelling and development evaluation.

Notably, true widths of mineralisation remain to be precisely determined, and further drilling and modelling will refine understanding of the deposit geometry and grade distribution.

The company emphasizes that no production decisions have been made yet, with outcomes dependent on forthcoming feasibility studies and detailed mine planning.