GreenTech hits high-grade copper at Whundo Copper Project —Will this undervalued ASX stock soar?

How is GreenTech Metals advancing copper exploration at Whundo in Western Australia?

GreenTech Metals Limited (ASX: GRE) has delivered promising new exploration results from its Whundo Copper Project in the mineral-rich Pilbara region of Western Australia. The company intersected significant high-grade copper mineralisation in newly identified zones at the Shelby and Austin targets, deepening confidence in the project’s scalability and long-term potential. As global copper prices remain elevated, the discovery of deeper, conductive ore shoots aligns well with GreenTech’s ambitions to expand its resource base and fast-track future production.

The drilling program—comprising two diamond core holes totalling 1,187 metres—tested previously unmined ore zones using electromagnetic (EM) conductor targets. The program not only confirmed the presence of high-grade copper mineralisation down plunge but also revealed the continuation of strongly conductive plates at depth, indicating room for substantial resource expansion. With copper trading near US$9,500 per tonne, the results support preliminary mine planning activities and further drilling aimed at establishing commercial viability.

What do the new assay results at Shelby and Austin reveal about mineral potential?

The Shelby and Austin zones delivered multiple high-grade copper and zinc intervals, reinforcing GreenTech’s geological model of vertically plunging volcanogenic massive sulphide (VMS) systems. At Austin, drill hole 25GTDD002 intersected 7.14 metres at 1.46% copper and 1.23% zinc, including a high-grade section of 3.45 metres at 2.42% copper and 2.41% zinc. At Shelby, drill hole 25GTDD001 recorded 9.94 metres at 1.32% copper, including a peak interval of 2.5 metres at 2.21% copper.

These findings validate GreenTech’s targeting strategy using downhole time-domain EM (DHTEM) surveys, which pinpointed the zones of greatest conductivity. The Shelby DHTEM model alone extends over 400 metres and shows conductance above 20,000 siemens, suggesting the mineral system remains open at depth. The results confirm that both Shelby and Austin host vertically extensive mineralisation and may be linked within a broader mineral shoot.

How is the stock market responding to GreenTech Metals’ drilling update?

GreenTech Metals’ share price reacted positively to the 16 April 2025 announcement, trading up 7.8% intraday to AUD 0.31 before settling slightly lower. Over the past three months, the stock has rebounded by more than 25%, supported by stronger copper fundamentals and renewed interest in junior critical minerals explorers. Trading volumes spiked significantly following the news, reflecting growing investor confidence in the company’s exploration narrative.

Sentiment around GreenTech Metals is currently bullish, driven by the dual impact of strong copper assay grades and a high-conviction exploration model. Analyst sentiment, though limited for a micro-cap company, reflects cautious optimism, especially as the company advances toward a possible near-term production scenario. Given the low current valuation, modest resource base, and proximity to processing facilities, GRE may appeal to speculative investors seeking exposure to copper development stories.

From a technical analysis standpoint, the stock is hovering near its 200-day moving average and could break out on confirmation of further drilling success or positive metallurgical results. A buy rating is warranted for risk-tolerant investors looking for critical minerals exposure, while long-term holders may view current levels as a solid entry point. Hold is recommended for those already positioned, with the potential for a re-rating pending additional results.

Why is GreenTech’s Whundo project strategically important for the copper supply chain?

The Whundo Copper Project is well-positioned within Australia’s Pilbara region, a historically underexplored area for copper compared to its global peers. Situated on a granted mining lease and with a history of small-scale production, Whundo benefits from both brownfield potential and nearby infrastructure. Previous operators including Fox Resources and Whim Creek Consolidated NL produced high-grade copper concentrate from the West and East Whundo deposits, respectively.

This legacy data gives GreenTech a head start in designing its Stage 2 exploration program and potential development pathway. The broader Pilbara region is undergoing a re-evaluation as a critical minerals province, with several ASX-listed explorers targeting copper, lithium, and battery metal deposits in proximity. Whundo’s strategic location, combined with its polymetallic character—including copper, zinc, gold, and possible gallium—strengthens its long-term commercial prospects.

How are electromagnetic surveys helping GreenTech unlock deeper copper zones?

The use of downhole time-domain electromagnetic (DHTEM) and SQUID fixed-loop EM (FLTEM) technologies has enabled GreenTech to detect highly conductive zones that lie beyond the reach of previous surface surveys. In both Shelby and Austin, recent DHTEM surveys confirmed that high-conductance anomalies correspond closely to the sulphide-rich mineral intercepts, proving the reliability of EM methods in VMS targeting.

At Shelby, the new EM model indicates a target with over 400 metres of depth extent, while at Austin, conductance in the 15,000–40,000 siemens range points to significant mineral continuity. Notably, geophysical consultants have suggested that Shelby and Austin may be part of a larger, unified mineral system, given their shared stratigraphy and plunge alignment. These findings justify broader step-out drilling and targeted follow-up to trace the ore body along strike and at depth.

What are GreenTech’s next steps in expanding Whundo’s copper resource?

GreenTech Metals has already outlined a forward program focused on resource definition and potential development. Upcoming drilling will concentrate on the lateral and vertical extents of the Shelby and Austin zones, as well as additional exploration at the Ayshia and Yannery deposits. The company also plans to drill a metallurgical core hole at Whundo to support conceptual mine design and ore processing analysis.

With the current copper resource base standing at 6.19 million tonnes grading 1.12% copper and 1.04% zinc, GreenTech aims to significantly upgrade the resource through this phase. The company is also initiating a conceptual mine study that will evaluate the feasibility of near-term production scenarios, leveraging nearby processing infrastructure at Radio Hill and Whim Creek.

In parallel, elevated gallium levels—up to 114 ppm Ga₂O₃ in drill assays—are being further investigated, as the presence of this critical semiconductor metal could enhance project economics. GreenTech is also assessing the potential for co-product recovery of zinc and gold, further supporting the case for mine development.

How does the broader market outlook support GreenTech’s copper exploration strategy?

Global copper demand is set to rise steadily over the next decade, fueled by the energy transition, growing electric vehicle production, and grid-scale renewable infrastructure buildouts. At the same time, supply constraints, project delays, and geopolitical risks are constraining new copper output, leading to persistent supply deficits projected from 2026 onwards.

In this context, junior explorers like GreenTech Metals play a vital role in the upstream pipeline. The company’s focus on underexplored VMS systems, use of advanced geophysics, and access to legacy processing infrastructure enhance its competitiveness. Furthermore, as Australia ramps up efforts to develop secure, domestic supplies of critical minerals, projects like Whundo may gain increased government and institutional support.