Infinity Mining Reports High-Grade Copper-Silver Results at Hillside Pilbara

Infinity Mining Strikes High-Grade Copper-Silver at Hillside With 9km Pilbara Trend Moving Toward Drill Testing

Infinity Mining Limited (ASX: IMI) has reported high-grade first-pass rock chip results from its Hillside Project in Western Australia's East Pilbara, including assays of up to 9.4% copper, 163g/t silver, 0.7g/t gold and 0.7% zinc from samples collected across a 9km corridor. According to the ASX announcement released on 7 July 2026, the results came from exposed gossans that the company considers consistent with volcanogenic massive sulphide (VMS) style mineralisation.

The update matters because Hillside remains largely untested. Infinity stated that only three of the 10 identified gossans have seen prior drilling, and its review indicates those historical holes were poorly oriented relative to the interpreted dip of the mineralised zones. That leaves seven gossans undrilled and gives the company a clearer basis for planning a maiden modern drilling campaign.

What Do the Hillside Assays Show?

In the announcement, Infinity said it collected 47 reconnaissance rock chip samples during late May and early June 2026, with 36 samples specifically targeting gossanous horizons along the 9km trend. Of those 36 gossan samples, 23 returned anomalous values for base metals, silver and gold, while 18 were identified as strongly anomalous.

The strongest reported assays are set out below.

These are surface rock chip assays, not drilling intercepts, so they do not define width, continuity or tonnage. Even so, the concentration of elevated copper, silver, gold and zinc values across multiple gossans over a long strike length provides a useful geochemical signal for target generation.

Infinity also reported mapped surface expressions ranging from 20m to more than 100m in strike length, with structural widths of up to 30m. Furthermore, structural mapping indicates the zones dip steeply to the west at approximately -70° to sub-vertical, a geometry that will influence hole orientation in any drill programme.

"These are compelling results which show Hillside has significant potential mineralisation. In light of these assays, Infinity considers Hillside has a high-conviction exploration potential and we are moving quickly to secure approvals for a drilling campaign."

— Cameron Petricevic, Executive Chairman, Infinity Mining Limited

Why Does the VMS Interpretation Matter?

Infinity's announcement frames Hillside as a target with features consistent with a VMS system. For investors, this deposit style is worth understanding because it helps explain why surface gossans and alteration patterns can be important early indicators.

A VMS deposit forms when hot, metal-bearing fluids move through volcanic rocks and deposit sulphide minerals, often close to the ancient seafloor. These deposits can contain copper, zinc, lead, silver and sometimes gold in relatively dense mineralised bodies.

At Hillside, Infinity described several field features that support this interpretation:

• Silicified cap — rock hardened and altered by silica-rich fluids
• Oxidised sulphide lenses — seen at surface as gossans, which are iron-rich weathered outcrops
• Footwall stringer zones — networks of mineralised veins below the main sulphide position

In simple terms, gossans can act as a surface indicator of sulphide mineralisation below. High copper and silver values in these weathered rocks may suggest that the original sulphide material was metal-rich before oxidation.

However, the key question remains unresolved. Are these high-grade surface expressions linked to sizeable and continuous mineralisation at depth? According to the update, only drilling can answer that.

Key Terms Explained

Gossan: A rust-coloured outcrop formed when sulphide minerals near surface break down through weathering. It can point to buried sulphide mineralisation.

VMS: Short for volcanogenic massive sulphide, a deposit type typically associated with copper, zinc, silver and gold in volcanic rock settings.

Strike length: The distance a geological feature can be traced across the surface.

Footwall stringer zone: A zone of mineralised veins beneath a main sulphide body that may represent the fluid pathways feeding the system.

Silicified cap: Rock altered by silica-rich fluids, commonly associated with hydrothermal systems.

Geological Setting Adds Useful Context

The Hillside Project sits in the Archaean Coongan Greenstone Belt in the East Pilbara, a region that Infinity says is prospective for both structurally controlled gold systems and VMS base-metal deposits. The announcement notes that the belt shares similar stratigraphic units and structural features with the neighbouring Panorama greenstone belt.

This matters because Panorama hosts known VMS deposits, including Develop Global's Sulphur Springs and Kangaroo Caves projects. Infinity said Hillside is located about 50km south-west of Sulphur Springs.

The company referenced Sulphur Springs at 17.4Mt @ 1.0% Cu, 0.3% Pb, 5.8% Zn and 21.8g/t Ag in the key points section of the announcement. The main point for investors is geological comparison, not direct grade comparison.

Surface rock chip grades should not be compared directly with resource grades. Rock chips are selective by nature and are used primarily as an exploration tool rather than a basis for estimating contained metal.

Historical Drilling Leaves Material Gaps

One of the more important parts of the announcement is Infinity's review of earlier exploration work. The company said historical activity was completed by Great Southern Mining in 1984, Barcome Limited in 1993, and Haoma Mining in 2010.

According to Infinity, only three of the 10 mapped gossans were previously drill tested. More importantly, when the historical collar positions and drill directions were reviewed against new structural measurements, the company concluded that the earlier holes were poorly oriented.

In practical terms, a poorly oriented hole may pass near a steep mineralised zone without crossing it effectively. For a target interpreted to dip steeply westward, drill direction becomes critical. If Infinity's structural interpretation is correct, the prior programmes may have left the main target zones inadequately tested.

That is why the historical review is relevant to the investment case. Hillside is not a new area in the sense of first discovery, but it may still be underexplored in a meaningful technical sense.

Next Steps Toward Drilling

Infinity stated that it will now seek the approvals required to drill Hillside. The announcement outlined four immediate workstreams:

1. Drill target refinement and matrix design — The company plans to finalise target selection and prepare the drilling footprint using new mapping and structural observations.
2. Heritage survey engagement — Infinity intends to submit the proposed drilling footprint to the relevant Traditional Owner corporation to facilitate heritage clearance surveys.
3. Regulatory compliance review — The field programme is expected to be sequenced in line with existing approved Department of Energy, Mines, Industry Regulation and Safety (DEMIRS) Programme of Work conditions.
4. Contractor procurement and mobilisation — The company plans to complete contractor selection and secure a mobilisation schedule.

Infinity also said a further reconnaissance sampling programme is planned for Q3 or Q4 2026, with broader geochemical work under evaluation, including possible adjustments to sample spacing and density.

For investors, the near-term milestones are therefore clear: heritage clearance progress, regulatory compliance steps, contractor appointment and confirmation of a drilling timetable.

Why Does Hillside Matter for IMI Investors?

The Hillside update is relevant to Infinity shareholders for several reasons. First, the company has reported high-grade copper and silver values at surface across multiple sample locations rather than from a single isolated occurrence. That improves confidence that the trend merits drill testing, while still falling short of proving scale.

Second, the mapped system covers a 9km corridor with 10 gossans, pointing to a sizeable target search area. In VMS exploration, scale at surface does not guarantee a deposit, but extended alteration and repeated gossan occurrences can indicate a fertile mineral system.

Third, the company now has modern structural data that may improve targeting accuracy. In early-stage exploration, the difference between a well-oriented first drill programme and a poorly oriented one can materially affect the quality of results.

Fourth, and importantly, the project appears to have a large proportion of undrilled targets. Seven undrilled gossans leave scope for first-pass testing across multiple target positions. Hillside also sits within Infinity's broader portfolio of more than 3,700km² across the East Pilbara, NSW's Macquarie Arc and Victoria's Melbourne Zone.

Keeping the Update in Perspective

The ASX report presents a strong early-stage exploration signal, but it does not establish a mineral resource or economic deposit. The current data consists of reconnaissance rock chip sampling, surface mapping and historical data review.

That distinction matters. Rock chip assays can help identify prospective zones, but they do not demonstrate continuity, thickness or mineability. Those factors depend on drill results, and Hillside has not yet reached that stage.

Nevertheless, the report suggests a logical progression point. Infinity has identified high-grade surface samples, mapped multiple gossans, improved its understanding of the structural setting and concluded that much of the target corridor remains inadequately tested by historical drilling.

For the market, the next material re-rating event is likely to be drilling rather than additional rock chip sampling. Until then, the Hillside Project stands as an early-stage copper-silver-gold target with encouraging surface results in a known Pilbara VMS setting.

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