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Murray Ward
In a shrewd play to grab more exploration ground in New Zealand, Critical Resources has lodged an application to expand its Croesus gold and tungsten project across the mineral-rich Barrytown granite pluton. The move comes as tungsten prices continue to rocket amid tightening Chinese export controls and growing Western demand for critical minerals.
The company says the application is aimed at extending its existing permit over a western extension of the Barrytown granite pluton. The pluton is heavily associated with high-grade tungsten mineralisation at the company’s Granite Creek prospect.
The new application area covers 270 hectares of highly prospective ground directly adjacent to Critical’s existing tenure.
The decision to bolster its landholding has come hot on the heels of first-pass reconnaissance fieldwork at Croesus, which has confirmed extensive greisen alteration and outcropping quartz veining at multiple hotspots within the Granite Creek catchment area.
‘APT prices having risen more than 8x since January 2025, capturing a tungsten target of this scale is strategically significant.’
Critical Resources managing director Tim Wither
Management says these physical field observations strongly support its current geological interpretation of a much broader, intrusion-related tungsten system across the wider Barrytown granite pluton.
Notably, the pluton has been witness to exceptional historical tungsten mineralisation, with past sampling at the company’s Croesus project delivering spectacular grades of up to 42.6 per cent tungsten trioxide from intrusion-related systems associated with greisen alteration.
Critical Resources managing director Tim Wither said: “The tungsten mineralisation documented at Granite Creek is highly encouraging — including the historic 42.6% WO₃ result. Extending the permit to capture the full mapped extent of the intrusion gives us a coherent footprint over the system we’re targeting.”
Nearby, historic float samples from granite boulders at Critical’s Little Granite Creek prospect also yielded exceptional results grading 26.6 per cent and 19.9 per cent tungsten trioxide, pointing to an extensive mineralised footprint.
The company’s exploration push could hardly be better timed, landing as the global tungsten market undergoes a major structural shift. Ammonium paratungstate (APT) – the key intermediate product used as the global pricing benchmark for tungsten – has undergone a powerful re-rating, heavily driven by Chinese export restrictions, accelerated Western industrial demand and escalating supply security concerns.
Prices have skyrocketed from US$335 (A$462) per metric tonne unit (MTU) in January last year, with one MTU equal to 10 kilograms, to as high as US$3200 (A$4414) per MTU today.
The company’s wider New Zealand exploration pipeline spans two further highly prospective mineral belts, offering low-cost, large-scale exposure to major regional gold and critical minerals systems. This footprint is strongly backed by the New Zealand government’s pro-investment Fast-Track Approvals Act, which is a regulatory “one-stop shop”, dramatically accelerating development timelines by cutting through historic permitting and bureaucratic delays.
Critical also holds the Lammerlaw project alongside its Cap Burn gold project in Central Otago. Beyond New Zealand, the company has quietly assembled a broader international growth portfolio, headlined by the advanced Mavis Lake lithium project in Ontario, Canada and the high-grade Halls Peak base metals project in New South Wales.
An active period of near-term news flow looks to be on the horizon for the junior explorer. Initial laboratory assay results from the Lammerlaw project are due shortly, with the first-pass field program assays from Croesus expected to hit the market in early June.
Additionally, field crews are crunching the numbers from soil-geochemistry mapping and pulling together plans for a follow-up reverse circulation drilling campaign to test down-plunge extensions at the Cap Burn gold target. Desktop reviews are also moving forward across the Silver Peaks and Tokomairiro permit areas within the Otago region.
With global tungsten markets starved for alternative Western supply, Critical appears to be hunting the right metal at the perfect time in the cycle.
If upcoming laboratory assays back up the visual greisen alteration seen in the field, this fast-moving explorer could be onto something very big in the land of the long white cloud.
Is your ASX-listed company doing something interesting? Contact: mattbirney@bullsnbears.com.au
