Critical Resources has lodged an application to extend its Croesus gold-tungsten permit in New Zealand, targeting a broader tungsten system with historic grades up to 42.6% WO3. This move comes as tungsten prices surge over eightfold due to global supply constraints.
- Extension of Croesus permit over Barrytown Granite Pluton
- Historic tungsten grades up to 42.6% WO3 at Granite Creek
- Tungsten prices surged 8x amid Chinese export restrictions
- First-pass field program assay results expected June 2026
- Follow-up exploration planned including drilling and mapping
Permit Expansion Targets Full Tungsten System Footprint
Critical Resources Limited (ASX:CRR) has taken a strategic step by lodging an Extension of Land (EOL) application to expand its Croesus gold-tungsten prospecting permit in New Zealand. The extension aims to cover the western continuation of the Barrytown Granite Pluton, the host intrusion for the greisen-hosted tungsten mineralisation at Granite Creek. This move aligns the permit boundary with the full mapped extent of the intrusion, enabling a more coherent evaluation of what the company describes as a broader intrusion-related tungsten system.
Recent reconnaissance fieldwork confirmed greisen alteration and quartz veining at multiple locations within the Granite Creek catchment, reinforcing the interpretation of a larger tungsten system than previously delineated. These findings build on earlier work that documented historic grab samples with tungsten grades as high as 42.6% WO3, a remarkably high figure for selective float samples, though not necessarily representative of continuous bedrock mineralisation.
Historic High-Grade Samples and New Fieldwork
The Croesus project, situated on the southwestern flank of the prolific Reefton Goldfield, hosts two distinct mineral systems: a structurally controlled gold-antimony lode and the greisen-hosted tungsten system associated with the Barrytown Granite. Historical exploration dating back to the 1980s and 2000s recorded tungsten grades from quartz rubble and granite boulders reaching up to 42.6% WO3, alongside greisenised granites with lower but significant tungsten values.
While these historical results provide compelling targets, Critical Resources cautions that these are selective samples and new assay results from its first-pass field program, expected in early June 2026, are awaited to verify and quantify the mineralisation extent. The recent fieldwork, which confirmed greisen alteration beyond the previously sampled areas, is a key step in refining the exploration focus. The company plans follow-up mapping and drilling at Granite Creek, weather permitting, to build on this early reconnaissance phase.
Tungsten Market Dynamics Elevate Strategic Importance
The timing of this permit extension is underscored by dramatic shifts in the global tungsten market. Prices of ammonium paratungstate (APT), a key tungsten concentrate, have surged from around $335 per metric tonne unit (MTU) in January 2025 to between $2,900 and $3,200 per MTU as of April 2026. This more than eightfold increase reflects China's export restrictions imposed in February 2026, tightening supply to Western markets, alongside accelerating demand driven by defence, semiconductor, and energy sectors.
Tungsten’s critical mineral status is now formally recognised by the US, EU, UK, Japan, New Zealand, and Australia, highlighting supply vulnerabilities given China's dominance of global production. Critical Resources' New Zealand projects thus offer exposure to a strategically important metal in a pro-investment jurisdiction benefiting from recent FastTrack reforms. The company’s Managing Director Tim Wither emphasised the strategic significance of capturing a Western-aligned tungsten target of this scale at this point in the cycle.
Exploration across the New Zealand portfolio continues apace, with assay results expected soon from both the Croesus and Lammerlaw projects and ongoing planning for drilling programs at Cap Burn and Rock and Pillar. These activities follow the company's recent greisen-hosted tungsten confirmation and build on a broader multi-commodity exploration strategy that includes lithium targets in Canada, where Critical Resources recently began field work at Mavis Lake to expand its lithium resource pipeline.
Bottom Line?
Critical Resources’ permit extension and ongoing fieldwork position it to capitalise on a rare opportunity in a tightening tungsten market, but assay results and regulatory approvals remain key near-term milestones.
Questions in the middle?
- Will June assay results confirm the historical high-grade tungsten mineralisation?
- How quickly can Critical Resources progress from exploration to resource definition in New Zealand?
- What impact will sustained high tungsten prices have on the company’s development timelines?