Critical Resources Ltd
A Western-Aligned Tungsten Discovery Takes Shape at the Right Moment
Critical Resources Limited (ASX: CRR) has completed first-pass field programmes at both its Lammerlaw Gold Project and Croesus Gold-Tungsten Project in New Zealand, delivering a result that has materially shifted the company's near-term exploration priorities. Critical Resources confirms greisen tungsten system at Granite Creek in New Zealand, with the field team identifying greisen alteration and outcropping quartz vein structures at multiple locations — extending beyond the footprint of historical sampling conducted in 1988.
That confirmation elevates Granite Creek as a priority tungsten target, arriving at a moment when the tungsten market has undergone one of its most dramatic price re-ratings in recent memory.
Ammonium paratungstate (APT) prices have risen from approximately $335/MTU in January 2025 to $2,900–$3,200/MTU as of 24 April 2026 — an increase of more than 8x in just 16 months. The driver is structural: China's February 2026 export licensing restrictions have materially constrained supply availability in Western markets, while demand from defence, semiconductor, and energy sectors continues to accelerate. Non-Chinese tungsten supply takes years to develop, meaning any new Western-aligned discovery carries elevated strategic relevance.
"The standout was Granite Creek. The team confirmed greisen alteration and outcropping quartz vein structures across multiple locations, including at the historical rock sampling sites that returned up to 42.6% WO₃, elevating Granite Creek as a priority."
— Tim Wither, Managing Director, Critical Resources
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What Was Found in the Field — and What It Means
Croesus: Tungsten Target Confirmed on the Ground
The Croesus prospecting permit covers approximately 183 km² in the Reefton Goldfields on New Zealand's South Island West Coast — a Tier-1 orogenic gold province with over 2 Moz of historical gold production. The permit hosts two mineralised systems operating in close spatial association.
Target 1 — Gold-Antimony Lode System (Croesus-Minerva Trend)
- Structurally controlled mineralisation hosted within sheared and quartz-veined Greenland Group metasedimentary rocks
- Historical hard rock workings at Croesus, Garden Gully, Taffy, and Minerva produced over 4,500 oz of gold at grades up to 17 g/t Au
- Previously reported rock chip results include up to 28.9 g/t Au at Blackball Creek and combined values of 10.4 g/t Au and 7.4% Sb at Croesus Ridge
- A mineralised corridor is interpreted to extend over more than 5 km along strike
Target 2 — Greisen-Hosted Tungsten System (Granite Creek)
This is the target that moved to top priority following fieldwork. Historical exploration by Mineral Resources NZ Ltd documented exceptionally high-grade tungsten mineralisation, with the most notable results including:
| Sample Type | Location | Grade |
|---|---|---|
| Scheelite-rich quartz rubble | Granite Creek | 42.6% WO₃ (337,642 ppm W) |
| Granite boulder — parallel quartz veinlets | Little Granite Creek | 26.6% WO₃ (210,985 ppm W) |
| Granite boulder — float sample | Little Granite Creek | 19.9% WO₃ |
| Greisenised granite with quartz veinlets | Granite Creek | Up to 0.90% WO₃ (potential bedrock source) |
| Arsenic anomalism | Associated halo | Up to 1,320 ppm As |
These are historical results from systematic programmes conducted between 1971 and 2006. The highest grades reflect selective grab samples of vein rubble and transported float — they are not representative of average or continuous bedrock mineralisation. However, the bedrock-source indicator at 0.90% WO₃ and the arsenic anomalies consistent with polymetallic alteration halos are the data points that make the system geologically coherent.
Critically, the field team's work in May 2026 confirmed that greisen alteration — the key geological indicator of this tungsten system — extends beyond the area sampled in 1988. That broader footprint is the exploration-stage signal that supports Granite Creek's elevation as a near-term priority. Furthermore, assay results from the Croesus programme are expected in early June 2026.
Lammerlaw: First Pass Complete, Assays Incoming
The Lammerlaw Gold Project covers approximately 410 km² located around 50 km south-southwest of Critical Resources' Cap Burn Gold Project in the Central Otago Goldfield. The Central Otago Antiform hosts OceanaGold's Macraes operation — a +10 Moz gold system — on its northeastern margin, with Lammerlaw situated on the southwestern limb of the same broad structure.
Two priority areas were systematically sampled during the first-pass programme:
OPQ Trend (Devils Creek)
- Geological and structural mapping along the inferred mineralised lode
- Targeted rock chip and soil sampling
- Ground-truthing of LiDAR-identified historical workings
- Historical data includes rock chip grades of 2.72 g/t Au and 2.58 g/t Au, and stream sediment tungsten anomalies of up to 340 ppm W
Stony Creek Trend
- Ground-truthing of a coherent electromagnetic geophysical anomaly coincident with historical gold and antimony workings
- Historical workings include reported test shipments grading 47% Sb
- Water geochemistry samples collected for dissolved chemical constituent analysis with ultra-low detection limits — designed to vector toward sulphide sources
Soil, water geochemistry, and rock chip samples have been dispatched. In addition, initial assay results from Lammerlaw are expected in mid-May 2026.
Understanding Greisen-Hosted Tungsten Systems — Why Does This Geology Matter?
What Is a Greisen?
A greisen is a type of hydrothermally altered granite, where hot mineralising fluids have transformed the original rock by replacing feldspars and micas with quartz, topaz, muscovite, and fluorite. These fluids also transport metals — particularly tungsten (as scheelite, WO₃) and tin. The result is a distinctive bleached, altered rock type often associated with the margins or apexes of granite intrusions.
Why Does It Matter for Tungsten Exploration?
Greisen-hosted systems are one of the primary geological settings for economic tungsten deposits globally — the same model that has produced significant tungsten mines in Portugal (Panasqueira), China, and elsewhere. When high-grade tungsten mineralisation occurs in transported vein rubble and boulders (as at Granite Creek), the geologist's task is to trace that material back to its bedrock source.
The confirmation of greisen alteration outcropping at multiple locations — and the 0.90% WO₃ in greisenised granite — suggests the system has a discoverable bedrock source, not merely surface float.
Glossary of Key Terms
| Term | Definition |
|---|---|
| WO₃ | Tungsten trioxide — the standard measure of tungsten grade in ore |
| APT | Ammonium paratungstate — the primary traded form of processed tungsten |
| MTU | Metric tonne unit — equal to 10 kg of WO₃; the standard trading unit for tungsten |
| Scheelite | Calcium tungstate mineral (CaWOâ‚„); the most common ore mineral of tungsten |
| Greisen | Hydrothermally altered granite associated with tungsten and tin mineralisation |
| Orogenic gold | Gold deposits formed during tectonic mountain-building events; often high-grade |
| g/t Au | Grams of gold per tonne of rock |
| Sb | Chemical symbol for antimony |
The Tungsten Market Context: A Structural Shift, Not a Spike
The timing of Critical Resources' field confirmation at Granite Creek is notable given what has happened in global tungsten markets. The price movement in APT is not a short-term trading event — it reflects a fundamental reconfiguration of supply availability.
Key Market Dynamics
- China accounts for approximately 80–85% of global mine supply of tungsten (USGS Mineral Commodity Summaries, 2025), with no viable near-term replacement for that volume from non-Chinese sources
- China's export licensing restrictions implemented in February 2026 have directly constrained APT and concentrate availability in Western markets
- APT prices have risen from approximately $335/MTU (January 2025) to $2,900–$3,200/MTU (CIF Rotterdam, April 2026)
- Tungsten has been formally designated a strategic critical mineral by the United States, European Union, United Kingdom, Japan, New Zealand, and Australia
- Demand is growing from defence munitions and armour, aerospace alloys, semiconductor fabrication, and high-performance industrial tooling — applications for which there are no viable substitutes
- New non-Chinese supply takes years to develop from exploration through to production
| Metric | Data Point |
|---|---|
| APT price — January 2025 | ~$335/MTU |
| APT price — April 2026 | ~$2,900–$3,200/MTU |
| Price increase | >8x in 16 months |
| China's share of global W mine supply | ~80–85% |
| Jurisdictions designating W as critical | US, EU, UK, Japan, NZ, Australia |
In this context, a confirmed greisen-hosted tungsten system in a Western-aligned, mining-friendly jurisdiction — with historical sample grades of up to 42.6% WO₃ — is the type of asset that commands attention from investors and strategic buyers alike.
What's Next: A Catalysts-Rich Second Quarter
Critical Resources has laid out a clear near-term pipeline of activity across its New Zealand portfolio, with multiple results expected over the coming weeks.
| Milestone | Expected Timing |
|---|---|
| Lammerlaw (OPQ Trend & Stony Creek) — initial assay results | Mid-May 2026 |
| Granite Creek — follow-up field mapping of broader greisen system | May 2026 |
| Croesus (Gold-Antimony & Tungsten targets) — assay results | Early June 2026 |
| Cap Burn — follow-up RC drilling (down-plunge extension below TZ4/TZ3) | Ongoing planning |
| Rock and Pillar — first-pass soil geochemistry mapping; desktop gold/antimony targeting | Ongoing |
| Silver Peaks / Tokomairiro — desktop review and land access discussions | Ongoing |
The company holds a 1,694 km² land package across two of New Zealand's most prospective gold and critical minerals regions. That scale provides a broad platform from which multiple target areas can be advanced simultaneously — a meaningful advantage for an early-stage explorer managing discovery risk across a portfolio.
The Investment Case: Discovery Scale Meets Market Timing
Several factors converge to make Critical Resources' New Zealand programme worth monitoring closely.
1. Verification at the Right Geological Setting
The Granite Creek confirmation is not simply a historical data point being recycled — it is new, independent field evidence that the greisen system documented in 1988 is real, mappable, and larger in spatial extent than previously understood. The extension of greisen alteration beyond the 1988 sample sites is the most material observation from this programme.
2. Multi-Commodity Optionality Across a Single Portfolio
The New Zealand projects expose investors to gold, tungsten, and antimony within a single land package. The Croesus permit alone hosts both a structurally controlled gold-antimony system (5+ km strike) and a greisen-hosted tungsten system. Lammerlaw, furthermore, adds gold-tungsten-antimony exposure in a structural setting analogous to the Macraes district.
3. Near-Term Catalysts Are Imminent
Assay results from Lammerlaw are expected in mid-May 2026 and from Croesus in early June 2026. These represent the first systematic laboratory confirmation of the field programmes — and will either validate or redirect the exploration thesis within weeks.
4. A Portfolio Positioned for Scale
At 1,694 km², the New Zealand land holding is large-scale by any measure. The Cap Burn Gold Project — already advancing toward follow-up RC drilling — provides a more advanced anchor asset while Lammerlaw and Croesus are in early-stage discovery mode.
5. The Tungsten Market Has Changed
For early-stage tungsten exploration, the market environment of 2026 is categorically different from 2024. The combination of restricted Chinese supply, Western government stockpiling intent, and formal critical mineral designations across six major jurisdictions has created a demand signal for new supply development that did not exist at this intensity before. Critical Resources is one of the few ASX-listed companies with a confirmed Western-aligned greisen tungsten target being actively advanced.
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Why This Company Warrants Continued Attention
Critical Resources is executing its New Zealand exploration programmes at a pace that reflects the company's stated commitment — receiving permit approval and deploying field teams within days, completing both first-pass programmes safely in challenging weather conditions, and generating a near-term assay pipeline that spans multiple target types and projects.
The field team's confirmation of greisen alteration at Granite Creek — extending the known system beyond 1988 boundaries — is the kind of observation that validates the geological thesis and justifies the exploration investment.
For investors focused on critical minerals exposure in Western-aligned jurisdictions, the combination of a confirmed tungsten system, a structurally supported gold-antimony corridor, and multiple near-term assay catalysts makes Critical Resources' New Zealand portfolio one of the more compelling early-stage programmes on the ASX right now.
Key Takeaway:
Critical Resources (ASX: CRR) has delivered a field confirmation that matters — greisen alteration extending beyond historical boundaries at Granite Creek — at precisely the moment when tungsten's strategic value is at its highest in living memory. With Lammerlaw assay results due mid-May and Croesus results in early June, the next six weeks represent a significant de-risking window for the investment case. The 1,694 km² New Zealand portfolio, multi-commodity exposure, and an 8x APT price backdrop make this a company worth watching closely.
Ready to Learn More About Critical Resources' New Zealand Discovery?
Critical Resources Limited (ASX: CRR) is advancing a confirmed greisen-hosted tungsten system at Granite Creek, alongside gold and antimony targets across a 1,694 km² New Zealand land package — all with multiple assay results expected within weeks. With APT tungsten prices up more than 8x in 16 months and China's export restrictions reshaping Western supply chains, the timing of this discovery could hardly be more significant. To explore the full investment case, review the company's projects, and stay across upcoming catalysts, visit the Critical Resources website at criticalresources.com.au.
