Redcastle Reef Drilling Confirms High-Grade Gold Continuity
Redcastle Resources has received final assay results from its extensive grade control drilling at Redcastle Reef, confirming multiple thick, high-grade gold intercepts and reinforcing the deposit's geological model.
- Completion of 327 RC grade control drill holes totaling 13,539 metres
- Multiple high-grade gold intercepts including 4m at 100.5 g/t Au and 1m at 397 g/t Au
- Assay results support continuity of mineralisation and geological model
- Ongoing integration of data with geotechnical and structural information
- Potential update to Mineral Resource Estimate under evaluation
Final Assays Confirm High-Grade Gold at Redcastle Reef
Redcastle Resources Ltd (ASX:RC1) has announced the receipt and validation of the final assay results from its comprehensive grade control (GC) drilling program at the Redcastle Reef gold deposit in Western Australia. The extensive drilling campaign, comprising 327 reverse circulation holes and totaling over 13,500 metres, has delivered multiple thick, high-grade gold intercepts that reinforce the existing geological model and demonstrate strong continuity of mineralisation.
Among the standout results are intercepts such as 4 metres at 100.5 grams per tonne (g/t) gold from 50 metres depth, including a remarkable 1 metre at 397 g/t gold, as well as other significant hits like 10 metres at 15.19 g/t and 6 metres at 17.97 g/t. These assays, reported as uncut values, reflect the nuggety nature of the gold mineralisation at Redcastle Reef, a characteristic that requires careful consideration in resource estimation.
Supporting Geological Interpretation and Resource Confidence
The drilling program included twin holes designed to assess local grade continuity and sampling reproducibility, with results broadly consistent with previous drilling. This approach has provided additional confidence in the geological model, particularly in understanding the spatial distribution and structural controls of the mineralised lodes.
Redcastle is now integrating the full GC dataset with geotechnical and structural data, including Optical Televiewer surveys, to refine geological interpretations. This work is foundational for detailed mine planning and evaluation of potential mining activities, subject to necessary approvals and commercial decisions.
Towards an Updated Mineral Resource Estimate
The company is assessing the comprehensive assay dataset to determine whether an update to the Redcastle Reef Mineral Resource Estimate (MRE) is warranted. Given the high-grade intercepts and improved definition of mineralised shoots within the deposit, an updated MRE could enhance the project's valuation and support future development plans.
Quality assurance and verification processes remain ongoing, including selective re-assaying and checks at alternative laboratories to ensure data integrity. The results to date align well with the 2025 MRE and support the continuity required for near-term mine planning.
Strategic Positioning in a Proven Gold Province
Redcastle Reef is situated approximately 60 kilometres east-southeast of the Gwalia Gold Mine, within the highly prospective Leonora-Laverton greenstone belt of Western Australia’s Eastern Goldfields. The deposit forms part of Redcastle’s broader portfolio, which includes the Queen Alexandra project and the underexplored TBone Belt, positioning the company well for growth through resource delineation and potential mining operations.
Chairman Ray Shaw highlighted that the completed grade control program significantly improves confidence in the deposit’s geological framework and the presence of coherent higher-grade shoots. This positions Redcastle Resources to advance detailed geological interpretation and mine planning, pending regulatory approvals and commercial considerations.
Bottom Line?
With high-grade continuity confirmed, Redcastle Reef is poised for a potential resource upgrade and next steps towards mining feasibility.
Questions in the middle?
- How will the nuggety nature of gold at Redcastle Reef impact future resource modeling and mine planning?
- What timeline and approvals are anticipated before mining operations can commence?
- Will the updated Mineral Resource Estimate materially increase the project's scale or grade profile?
