Redcastle Resources Unlocks Queen Alexandra Pit Expansion With New Mining Lease Grant
Key Takeaways
- Mining Lease M39/1171, granted by the Western Australian Department of Mines effective 1 September 2026, removes the southern boundary constraint that had previously capped the Queen Alexandra pit footprint.
- The BML Pit V2 (QA Big Pit) concept can now extend southward across the former boundary, enabling a materially larger optimised pit design pending MDCP amendment approval from DMPE.
- The lease grant follows the recently secured Native Title and Mining Agreement with WTAC, meaning two separate regulatory tracks — landholder consent and tenement approval — converged within the same period.
- Three concrete next steps are underway: MDCP amendment submission, a grade-control drilling review within the southern QA deposit, and a reassessment of exploration and development priorities across the Northern Exploration Corridor and TBone Belt.
- Management is actively evaluating alternative milling options against capacity, cost, and timing criteria, with the processing solution representing a key variable on the path to resumed production.
Mining lease grant unlocks Queen Alexandra pit expansion
Redcastle Resources (ASX: RC1) has received the grant of Mining Lease M39/1171 from the Western Australian Department of Mines, Petroleum and Exploration, effective 1 September 2026. The new tenement sits immediately south of the company’s existing Mining Lease M39/318 and directly addresses the boundary constraint that had previously limited the Queen Alexandra (QA) pit footprint.
When big ASX news breaks, our subscribers know first
What the Queen Alexandra pit expansion means
Removing the boundary constraint
Prior to this grant, the QA pit design was required to maintain a safe standoff distance from the southern boundary of M39/318, artificially capping how far the pit could extend. With M39/1171 now granted, the BML Pit V2 (QA Big Pit) concept can be extended southward across that boundary, as illustrated in the company’s tenement plan and cross-section drawings. This expanded pit design is subject to approval of an amended Mining Development and Closure Proposal (MDCP) being amended for submission to the Department of Mines, Petroleum and Exploration (DMPE).
Understanding mining leases and why tenure matters
A mining lease grants the holder the legal right to extract minerals within a defined area of ground. For open-pit operations, contiguous tenure matters because pit shells cannot be optimally engineered around artificial administrative boundaries — once those boundaries are resolved through granted leases, the pit design can follow the geology rather than the paperwork. The next formal step before any expanded pit work can commence is MDCP amendment approval from DMPE. For investors, a lease grant like this is a tangible de-risking event: it converts a regulatory constraint into a solved problem, clearing the path for a materially larger pit design.
Next steps and the broader Northern Exploration Corridor
Three concrete next steps follow from the M39/1171 grant:
- BML, as operator of the RB JV, is amending the currently approved MDCP for submission to DMPE as soon as possible.
- The RB JV will review a plan for additional grade-control drilling within the southern QA deposit to confirm local grade distribution and support detailed mine planning.
- Redcastle will assess possible changes in exploration and development priorities across the broader Northern Exploration Corridor and in the TBone Belt following the grant.
It is also worth noting that the M39/1171 grant follows the recently announced Native Title and Mining Agreement with WTAC. Together, these two developments indicate the project’s regulatory pathway is advancing on multiple fronts simultaneously, though no specific timeline has been disclosed.
The Native Title and Mining Agreement with WTAC, secured shortly before this lease grant, cleared the landholder consent pathway that is a prerequisite for tenement approvals in Western Australia, meaning both regulatory tracks converged within the same period.
Dr. Ray Shaw, Chairman
“We are pleased to add another granted mining tenement to our portfolio which provides long term tenure which contains what we believe is a significant exploration corridor for gold mineralisation. The recently announced Native Title and Mining Agreement with WTAC combined with the granting of M39/1171, sets Redcastle on a course to fully optimise its Redcastle Gold Project upon resumption of mining operations. Our Joint Venture Team continues to complete tasks to move the Company forward by reprioritising exploration plans across the portfolio and evaluating potential alternative milling options seeking the right combination of capacity, cost and timing to secure an appropriate processing solution.”
The next major ASX story will hit our subscribers first
Tenure secured, pit design unconstrained
The most immediate investor takeaway is that tenure risk on the southern QA extension is now resolved. The grant of M39/1171 removes the administrative obstacle that had constrained the pit boundary, and the path to an optimised, enlarged QA pit design — merging the previously constrained pit within M39/318 with the BML Pit V2 concept that extends into M39/1171 — is now open, pending MDCP amendment approval from DMPE.
Beyond the pit itself, management is actively evaluating alternative milling options, weighing capacity, cost, and timing to identify an appropriate processing solution. The announcement frames this as an ongoing workstream, not a stalled one.
Alternative milling options are being evaluated against three criteria: capacity, cost, and timing, with the processing question representing one of the more consequential variables in the project’s path to resumed production.
No financial figures or production metrics are disclosed in this announcement.
Ready to Learn More About the Queen Alexandra Pit Expansion?
The grant of Mining Lease M39/1171 removes the boundary constraint that had previously limited the Queen Alexandra pit footprint, opening the path to a materially larger optimised pit design at Redcastle’s gold project in Western Australia. Combined with the recently secured Native Title and Mining Agreement, the project’s regulatory pathway is advancing on multiple fronts simultaneously.
For a deeper look at the company’s exploration strategy and development priorities across the Northern Exploration Corridor, explore Redcastle Resources (ASX: RC1) on Discovery Alert to stay across the latest milestones as the MDCP amendment progresses.