Critical Resources Limited has validated a high-grade tungsten system at its Granite Creek target in New Zealand, with channel sampling returning 16.63% WO₃ true width. The results underpin a clear path to drilling amid tightening global tungsten supply.
- Channel sample returns 16.63% WO₃ over 0.41 m true width
- Multiple high-grade samples across 600 m target area
- Historical data validated, supporting advanced drill targeting
- Tungsten supply constrained by China export controls
- Exploration permit application and drilling planned for late 2026
High-Grade Tungsten Confirmed at Granite Creek
Critical Resources Limited (ASX:CRR) has reported standout tungsten assay results from its Granite Creek target within the Croesus Project on New Zealand’s West Coast. A channel sample taken perpendicular to an in-situ quartz-scheelite vein returned 0.41 metres grading 16.63% WO₃, representing a true width result rather than a selective high-grade chip. This is among nine samples from the 25 collected that showed high-grade tungsten mineralisation, with six above 1% WO₃ and three exceeding 2% WO₃.
The sampling campaign identified multiple mineralised bedrock and float occurrences spanning at least 600 metres, indicating a broader quartz-vein and greisen-hosted tungsten system rather than an isolated pocket. Additional in-situ results included grades of 2.21%, 1.61%, 0.90%, and 0.67% WO₃ from quartz veins and granite selvage, while float samples showed tungsten up to 8.01% WO₃. Elevated tungsten was also detected in altered footwall granite adjacent to the main vein, suggesting mineralisation extends beyond visible quartz veins.
Validation of Historical Exploration Enhances Targeting
The modern sampling program has partially validated detailed historical datasets, including selective samples from 1988 that reported grades as high as 42.6% WO₃. These historical results, while selective and not representative of average grades or continuity, provide a robust framework for exploration. The combined datasets substantially reduce the need for broad first-pass exploration, allowing Critical Resources to focus on confirming vein geometry and continuity ahead of drilling.
High-grade scheelite-bearing float has been found on both sides of the Barrytown Granite ridge, including at Little Granite Creek where historical assays reached 26.6% WO₃. The distribution of float in separate catchments supports the interpretation of a mineralised system extending well beyond the immediate Granite Creek target.
Strategic Importance Amid Global Tungsten Supply Constraints
Tungsten is a critical metal with few substitutes, essential for cutting tools, defence applications, aerospace alloys, and electronics. China dominates around 80% of global tungsten mine production and processing and has tightened export controls since 2023, including recent restrictions on ammonium paratungstate (APT) exports. This has sharply tightened Western market supply, pushing APT prices to roughly US$3,000–3,200 per metric tonne unit, about ten times the long-run average.
High-grade tungsten deposits in stable Western jurisdictions like New Zealand are rare. Market analysts forecast a 47% increase in tungsten demand by 2035, underpinning expectations of a structural supply deficit. Critical Resources’ Granite Creek project, located in a politically stable region with established mining infrastructure, offers a strategically valuable new source of tungsten.
Pathway to Drilling and Further Exploration
Critical Resources plans to integrate historical and modern data to finalise priority drill targets. Upcoming work includes detailed geological and structural mapping of quartz-scheelite veins and greisen zones, additional channel sampling to confirm grade distribution and vein geometry, and consolidation of datasets into a geological model. The company targets lodging an exploration permit application in the second half of 2026, with maiden drilling to follow subject to permit grant and environmental approvals.
The company emphasises that broad first-pass regional exploration is unnecessary due to the extensive validated dataset, enabling a more focused approach to drill testing.
Alignment with New Zealand’s Critical Minerals Strategy
The Granite Creek tungsten system aligns with New Zealand’s Critical Minerals List and government strategy to develop domestic mineral resources and resilient supply chains. Located within the established West Coast mining province, the Croesus Project benefits from proximity to other mineral projects, existing infrastructure, and community support for responsible development. This regional context supports a smoother pathway to exploration approvals and potential mine development.
Critical Resources also continues to advance its broader New Zealand portfolio, including gold targets at Cap Burn and Rock and Pillar, indicating a diversified approach to critical and precious metals exploration in the region.
Bottom Line?
Granite Creek’s high-grade tungsten results position Critical Resources to capitalise on tightening global supply, but the leap from surface sampling to economic resource hinges on successful permitting and drill outcomes in the coming year.
Questions in the middle?
- Will metallurgical testing confirm the amenability of Granite Creek’s scheelite to conventional processing?
- How quickly can Critical Resources secure exploration permits and environmental approvals to maintain momentum?
- To what extent will ongoing Chinese export restrictions sustain elevated tungsten prices and support project economics?