Solstice Minerals confirms deep Nanadie copper-gold zones as ASX:SLS jumps 29%

Solstice Minerals Limited (ASX: SLS) has reported multiple wide copper-gold intersections from its first diamond drill tail at the Nanadie Copper-Gold Project in Western Australia, including 30.7 metres grading 1.41% copper and 0.34 grams per tonne of gold from 461.5 metres. Hole NANRCD004 reached a final depth of 629.1 metres and extended mineralisation more than 300 metres below the boundary of Nanadie’s existing Mineral Resource Estimate. Other intersections included 37.8 metres at 0.87% copper and 0.25 grams per tonne of gold, 33 metres at 0.66% copper and 15 metres at 0.78% copper. The results reinforce the possibility that the current 40.4-million-tonne resource represents only a partially tested portion of the wider system, although substantial drilling and technical work remain before the deeper zones can be incorporated into an economic development case. ASX:SLS closed at A$2.02 on June 26, rising 29.07% and approaching its intraday 52-week high of A$2.08.

Why do Solstice Minerals’ first Nanadie diamond assays matter beyond the 629.1-metre headline?

The most important feature of NANRCD004 is not that the hole reached 629.1 metres. It is that the diamond tail confirmed several separate zones of meaningful copper-gold mineralisation beneath and beyond the limits of the existing resource model.

The strongest intersection returned 30.7 metres at 1.41% copper and 0.34 grams per tonne of gold from 461.5 metres, including 15 metres at 2.12% copper and 0.47 grams per tonne of gold. This is a material grade improvement over Nanadie’s current Inferred Mineral Resource Estimate of 40.4 million tonnes at 0.4% copper and 0.1 grams per tonne of gold.

A second deeper zone returned 37.8 metres at 0.87% copper and 0.25 grams per tonne of gold from 547 metres, including 22.5 metres at 1.10% copper and 0.31 grams per tonne of gold. Additional intersections included 33 metres at 0.66% copper from 341 metres, 37 metres at 0.44% copper from 380.1 metres and 15 metres at 0.78% copper from 428.4 metres.

These results suggest that the mineralised system does not simply become weaker or disappear beneath the existing resource. Instead, the drilling indicates that copper-gold mineralisation continues through multiple alteration and deformation zones along the eastern margin of the host gabbro.

That distinction matters for future resource modelling. A large low-grade mineralised envelope may support scale, but higher-grade internal zones can materially improve average head grade, early mining economics and the flexibility available when designing a potential open pit or underground operation.

The results also validate the use of diamond tails to extend earlier reverse circulation holes. NANRCD004 continued an existing hole that had previously intersected 62 metres at 1.55% copper and 0.66 grams per tonne of gold before the diamond drilling tested the deeper continuation.

For Solstice Minerals, the result provides geological confirmation that the earlier reverse circulation drilling was not merely identifying isolated shallow zones. The company now has evidence of mineralisation extending from near surface to depths well beyond the current resource boundary.

Why should investors treat the 629.1-metre combined result differently from a continuous ore intercept?

Solstice Minerals also reported a combined interval of 629.1 metres at 0.50% copper and 0.17 grams per tonne of gold from surface to the end of the hole. That figure is visually impressive and helps illustrate the broad mineralised nature of the system, but it should not be interpreted as 629.1 metres of uninterrupted economic ore.

The calculation includes both the original reverse circulation section and the later diamond tail. It also includes unmineralised intervals, oxide material and internal waste zones between the higher-grade copper-gold intersections.

The combined average therefore provides information about the overall metal tenor of the entire drill column rather than defining a mineable interval. Any future resource or mine design would need to separate mineralised material from waste based on geological domains, grade cut-offs, mining selectivity and economic assumptions.

This does not make the combined result meaningless. Maintaining an average of 0.50% copper and 0.17 grams per tonne of gold across the full hole, including unmineralised sections, indicates that copper occurs throughout a substantial vertical extent.

However, development economics will depend more heavily on the location, continuity and geometry of the discrete higher-grade zones. The 30.7-metre and 37.8-metre intersections are therefore more relevant to potential mine planning than the headline whole-hole average.

True widths are also not yet confirmed. Reported intervals are downhole lengths, and further drilling is required to determine how the mineralised structures are oriented relative to the drill hole.

A single exceptional hole can change the exploration thesis, but it cannot define an orebody. Solstice Minerals must now demonstrate that the deeper zones continue across neighbouring sections rather than narrowing, weakening or changing orientation away from NANRCD004.

How could the deeper high-grade zones change Nanadie’s future resource and development profile?

Nanadie currently contains an Inferred Mineral Resource Estimate of 40.4 million tonnes at 0.4% copper and 0.1 grams per tonne of gold. That resource contains approximately 162,000 tonnes of copper and 130,000 ounces of gold, together with silver by-product potential.

Approximately 90% of the existing resource consists of fresh rock mineralisation below 40 metres. The primary copper occurs mainly as chalcopyrite hosted within a mafic intrusive body, with higher grades appearing where sulphide vein density and alteration increase.

The latest drilling extends the mineralised system more than 300 metres below the present resource boundary. If surrounding holes confirm comparable widths and grades, Solstice Minerals could add substantial tonnes beneath the existing model.

Resource growth alone would not guarantee stronger economics. A larger deposit with the same average grade can require additional stripping, processing capacity and capital. The more strategically valuable outcome would be a larger resource that also contains enough higher-grade zones to improve the production schedule.

Higher-grade material can potentially support stronger cash generation during the early years of a mine, when construction debt and capital recovery pressures are greatest. It may also allow lower-grade sections to remain outside the initial mine plan until copper prices or operating conditions justify their inclusion.

The broad dimensions of the Nanadie system could create several development pathways. Near-surface mineralisation may be suitable for open-pit evaluation, while deeper extensions could eventually require underground mining if they demonstrate sufficient grade and continuity.

No decision between these approaches can be made from the current drilling. Geotechnical studies, resource classification, metallurgical recovery, mining dilution, processing costs and infrastructure requirements will determine which parts of the deposit have reasonable prospects for economic extraction.

The latest results nevertheless increase the possibility that Nanadie is not merely a modest, shallow resource. The project may contain a vertically extensive system with multiple internal zones capable of supporting a more substantial development concept.

Could Solstice Minerals’ low-cost Nanadie acquisition become a transformative ASX transaction?

Solstice Minerals acquired the Nanadie Copper-Gold Project from Cyprium Metals Limited in March 2025. The upfront consideration comprised A$1 million in cash and three million Solstice Minerals shares.

An additional three million shares become payable if Solstice Minerals announces a resource containing more than 250,000 tonnes of copper within four years of completing the acquisition, using a cut-off grade of at least 0.20% copper.

The existing resource contains approximately 162,000 tonnes of copper. On a simple contained-metal comparison, Nanadie would need to add another 88,000 tonnes, representing growth of roughly 54%, to cross the deferred consideration threshold. The eventual calculation may differ because the current resource and performance condition use different minimum cut-off criteria.

The latest drilling improves the possibility of reaching that threshold, but one deep hole cannot provide the necessary resource growth. Solstice Minerals must define continuity across the deeper zones and extend mineralisation along strike before additional tonnes can be included in an updated estimate.

Even after accounting for the deferred shares, the acquisition cost appears modest compared with Solstice Minerals’ current market capitalisation of approximately A$348 million. Much of that valuation has emerged because the market now assigns significantly greater potential to Nanadie than was visible when the transaction was completed.

That creates both opportunity and pressure. Acquiring an underexplored resource cheaply can generate exceptional shareholder value when subsequent drilling expands its scale. Yet a share price re-rating can begin pricing in success long before engineering studies determine whether the project is economically viable.

The transaction also demonstrates the value of counter-cyclical asset selection. Solstice Minerals acquired Nanadie when its own cash position and gold-focused portfolio allowed it to pursue a copper opportunity without competing against the valuations normally attached to advanced development assets.

The next stage is more difficult. Exploration success has already increased expectations, and management must now convert geological upside into a modern resource estimate, metallurgical understanding and credible development pathway.

Does Solstice Minerals have enough funding to accelerate Nanadie without immediate dilution?

Solstice Minerals entered the current drilling phase with a stronger balance sheet than many junior explorers. The company reported approximately A$16.5 million in cash at March 31, 2026 and subsequently completed an A$32.6 million institutional placement priced at A$1.00 per share.

The placement was designed to accelerate exploration at Nanadie, including reverse circulation drilling, diamond tails, resource delineation and technical studies. The capital also gives Solstice Minerals room to continue work across its Western Australian gold portfolio without forcing the company to choose immediately between copper and gold exploration.

The A$1.00 placement price has become an important market reference. ASX:SLS closed June 26 at A$2.02, meaning placement investors were sitting on a substantial paper gain less than three months after the raising.

This reduces immediate financing pressure but does not eliminate future capital requirements. Exploration and resource definition are relatively inexpensive compared with feasibility studies, environmental approvals, processing test work and mine construction.

If Nanadie advances into development, Solstice Minerals may eventually need strategic partners, additional equity, project debt or an asset-level transaction. The company’s negotiating position should improve if drilling establishes a larger, higher-grade resource, but financing conditions will also depend on copper prices and the wider availability of mining capital.

The recent share-price appreciation creates optionality. A higher valuation can reduce dilution if the company raises additional equity, although management must avoid raising capital simply because the market is receptive when the existing programme is already well funded.

Capital discipline will now become as important as exploration speed. The company has sufficient funding to gather the technical evidence required for the next major decisions. Investors should expect that money to be directed towards resource growth, metallurgy and project definition rather than rapid expansion into unrelated assets.

What work remains before Nanadie can support a development decision or economic study?

Nanadie remains an exploration and resource-definition project. The latest drilling materially strengthens the geological case, but the project does not yet have a completed scoping study, feasibility study or Ore Reserve.

The current resource estimate dates from 2022 and is classified entirely in the Inferred category. Inferred resources carry lower geological confidence and cannot form the sole basis of detailed mine planning or reserve estimation.

Solstice Minerals must complete sufficient infill drilling to convert appropriate areas into Indicated status. This work will test whether the grades and widths observed in current holes continue consistently between drill sections.

Metallurgical testing is another critical requirement. The presence of chalcopyrite and absence of obvious deleterious sulphide species may support conventional flotation, but laboratory tests must confirm recovery rates, concentrate grades and the behaviour of gold and silver by-products.

The company must also determine whether the oxide and transitional material require a separate processing route. Different mineralisation styles can complicate flowsheet design if they cannot be processed efficiently through the same plant.

Geotechnical drilling will be needed to understand rock strength, structural conditions and appropriate pit or underground design parameters. Environmental baseline studies, water supply, power, transport and waste-storage requirements must also be assessed.

Nanadie benefits from being located on a granted mining lease in relatively flat Western Australian terrain. That reduces some tenure and land-access uncertainty, but a granted lease does not mean a new mine is automatically approved or economically justified.

The next resource update will be an important milestone, but investors should judge it on more than headline tonnes. Changes in contained copper, average grade, resource classification and the proportion of higher-grade material will provide a better indication of whether the drilling has improved development quality.

What does ASX:SLS’s 29% rally and 52-week high reveal about investor expectations?

Solstice Minerals closed at A$2.02 on June 26, up 29.07% from the previous close of A$1.565. The shares traded as high as A$2.08 during the session, establishing a new 52-week peak.

Across the five trading sessions from June 19, ASX:SLS gained approximately 23.2%. The stock was up around 34.7% over one month and stood more than 800% above its 52-week low of approximately A$0.215.

Trading volume rose to around 1.4 million shares, well above the company’s recent daily average. The strong close near the session high indicates that buying interest was sustained rather than confined to an early speculative spike.

The market reaction reflects several factors. The latest assays confirmed that previously reported visible chalcopyrite corresponded with strong copper grades, reduced the risk that the deep drilling would disappoint and demonstrated that higher-grade mineralisation continues below the current resource.

Investors are also pricing in the remaining exploration pipeline. Assays are pending from another 12 completed diamond holes, while a reverse circulation rig is undertaking an expanded 13,000-metre Phase 2 programme involving step-outs, resource delineation and precollars for additional diamond tails.

The valuation now includes substantial expectations of future resource growth. A market capitalisation near A$350 million is materially higher than the value normally assigned to an early-stage explorer with an entirely Inferred resource and no economic study.

That does not make the valuation automatically excessive. The market may be anticipating a much larger copper system, stronger internal grades and the strategic scarcity of advanced copper assets in Western Australia.

However, the share price leaves less room for average results. Future assays must increasingly support continuity rather than simply produce another isolated high-grade intersection. The higher the valuation climbs, the more the market will demand a resource-scale answer.

Which upcoming Nanadie assays and technical milestones could drive the next ASX:SLS re-rating?

Assays from the remaining 12 completed diamond tails represent the most immediate catalysts. These holes test different parts of the system and should provide a better indication of whether NANRCD004 is representative or exceptional.

NANRCD005 may be particularly important because it was drilled near NANRCD004 and reached a final depth of approximately 840 metres. Results from that hole could test whether the deeper high-grade zones continue and whether mineralisation persists below the first reported diamond tail.

The ongoing 13,000-metre reverse circulation programme will also influence the scale of the next resource model. Drilling is targeting northern and southern extensions, internal grade zones and areas associated with induced-polarisation chargeability features.

Metallurgical results will determine whether the geological grades can be translated into saleable copper and gold recoveries. Strong recovery performance could support a relatively conventional processing concept, while complex mineral behaviour would increase technical risk.

An updated Mineral Resource Estimate is likely to become the central valuation event once enough assays have been received and incorporated. Investors will focus on whether contained copper moves towards or beyond the 250,000-tonne deferred consideration threshold.

After that, the company must decide when the project has enough geological definition to justify a formal economic study. Beginning too early could produce unreliable assumptions, while waiting too long risks allowing exploration spending to expand without a clear commercial framework.

Solstice Minerals has already demonstrated that Nanadie is deeper and more mineralised than the existing model suggests. The next challenge is proving that the emerging scale can support economics rather than merely a larger collection of impressive drill results.

Key takeaways from Solstice Minerals’ Nanadie copper-gold results and ASX:SLS rally

• Solstice Minerals’ first Nanadie diamond assays confirmed multiple wide copper-gold zones more than 300 metres below the current resource boundary.
• The strongest result was 30.7 metres at 1.41% copper and 0.34 grams per tonne of gold, including 15 metres at 2.12% copper.
• A second deep zone returned 37.8 metres at 0.87% copper, including 22.5 metres at 1.10% copper.
• The 629.1-metre combined result includes unmineralised intervals and should not be interpreted as a continuous mineable intersection.
• Nanadie currently contains 40.4 million tonnes at 0.4% copper and 0.1 grams per tonne of gold, holding 162,000 tonnes of copper.
• Resource growth beyond 250,000 tonnes of contained copper would trigger three million deferred consideration shares for the project vendor.
• Solstice Minerals reported A$16.5 million in cash at March 31 and subsequently completed a A$32.6 million placement at A$1.00 per share.
• ASX:SLS jumped 29.07% to A$2.02 and traded at a new 52-week high of A$2.08, lifting its market value to around A$348 million.
• Assays remain pending from 12 completed diamond holes, while a 13,000-metre reverse circulation campaign continues.
• The next major valuation tests are continuity of the deep zones, an updated resource, metallurgical performance and the timing of an economic study.