Siren Gold Limited has secured the Queen Charlotte exploration permit, encompassing the historic Endeavour antimony mine, New Zealand’s largest producer in the 19th century, positioning the company to expand its critical minerals footprint.
- Queen Charlotte exploration permit granted, including historic Endeavour mine
- Endeavour mine produced over 3,000t of high-grade antimony ore in late 1800s
- Metallurgical tests show 63% antimony concentrate with 90% recovery
- Significant vertical (400m) and strike (1.2km+) mineralisation extent identified
- Siren advancing exploration alongside existing Sams Creek and Langdons projects
Historic Permit Acquisition
Siren Gold Limited (ASX:SNG) has taken a significant step in its New Zealand exploration strategy by securing the Queen Charlotte exploration permit. This permit includes the historic Endeavour antimony mine in Marlborough, a site that was New Zealand’s largest antimony producer during the late 19th century. The mine historically yielded over 3,000 tonnes of stibnite ore, which was directly shipped to England, underscoring the site's past economic importance.
Geological and Metallurgical Insights
The Endeavour mine's mineralisation extends along a 1,200-metre strike and plunges vertically over 400 metres, a scale that impresses when compared to similar regional deposits. Notably, metallurgical testwork from 1977 demonstrated that a two-stage flotation process could produce a stibnite concentrate grading 63% antimony with a 90% recovery rate. This bodes well for potential future processing efficiencies. Additionally, the mineralised system contains gold at approximately 2 grams per tonne, a byproduct not recovered historically but now of interest given rising gold prices.
Strategic Expansion in Critical Minerals
The Queen Charlotte permit complements Siren’s existing portfolio, which includes the Sams Creek gold project and the Langdons antimony-gold project near Reefton. The company’s chairman and interim managing director, Brian Rodan, highlighted the strategic importance of antimony, classified as a critical and strategic mineral by multiple countries due to its geopolitical value. With antimony prices recently surpassing US$50,000 per tonne and supply constraints emerging, exacerbated by China’s export restrictions, Siren is well positioned to capitalise on this market dynamic.
Next Steps and Exploration Outlook
Siren plans to advance the Queen Charlotte project through detailed field mapping, soil and rock chip sampling, and channel sampling to define drill targets. The company is also pursuing a Minimum Impact Activity permit from New Zealand’s Department of Conservation to facilitate exploration activities. These steps will be critical to unlocking the full potential of the mineralised shear zones, which may extend up to 5-6 kilometres when considering adjacent occurrences.
Context Within New Zealand’s Mineral Landscape
The Endeavour mineralisation shares geological similarities with the Auld Creek deposit near Reefton, which hosts an inferred resource of 105,000 ounces of gold and 14,500 tonnes of antimony. Siren’s ability to explore a vertical extent nearly three times greater than that tested at Auld Creek suggests substantial upside potential. Meanwhile, the company is progressing its Sams Creek project towards mining permit approval, signaling a transition from exploration to development.
Bottom Line?
Siren Gold’s acquisition of the Queen Charlotte permit marks a pivotal expansion into a high-grade, strategically critical mineral asset, setting the stage for a potentially transformative exploration campaign.
Questions in the middle?
- How will Siren’s upcoming drilling programs refine the resource potential at Endeavour?
- What are the timelines and challenges for obtaining the Minimum Impact Activity permit from the Department of Conservation?
- Can Siren leverage rising antimony prices and geopolitical demand to accelerate project development?