Trek Metals Targets ~30km Kuro Manganese Basin at Christmas Creek

Trek Metals Expands Kuro Drilling as Geophysics Outlines a ~30km Manganese Basin at Christmas Creek

Trek Metals Limited (ASX: TKM) has outlined the next phase of exploration at its 100%-owned Christmas Creek Project in Western Australia, with a ~2,500m Reverse Circulation (RC) drilling program set to commence shortly at the Kuro manganese discovery. According to the ASX announcement dated 19 August 2026, the new program will target multiple high-priority anomalies identified from an expanded Induced Polarisation (IP) survey, while also testing the broader scale potential of a basin now interpreted to extend for ~30km.

For investors, the update matters because it shifts Kuro from a single discovery area toward a wider basin-scale exploration campaign. The company is not only following up the original mineralised zone, but also using geophysical data to identify additional targets within the same interpreted host basin.

What Does the Latest Christmas Creek Update Show?

In the announcement, Trek reported that it has completed an extended IP survey over the greater Kuro region, pushing geophysical coverage beyond the original discovery footprint. The company said the survey results, combined with conductivity and gravity datasets, have outlined numerous new target areas that warrant drill testing.

Earthworks have already been completed over the selected Phase 2 drill areas, with access and drill pads prepared under the supervision of Traditional Owners. Trek said drilling is expected to start shortly and will focus on anomalies interpreted as potential extensions to the known manganese system.

The current update includes several key takeaways:

• ~2,500m of Phase 2 RC drilling planned at Kuro
• 123.775 line-km of Gradient Array Induced Polarisation data now acquired across the prospect
• Multiple new chargeability and conductivity anomalies identified
• A ~30km interpreted prospective basin defined from merged residual gravity data
• A GAIP survey completed at Leviathan, an additional manganese target within the same basin

This is still an early-stage exploration story. Trek stated that no Mineral Resource has been estimated for Kuro, and further drilling and evaluation are required.

"The recent acquisition and interpretation of geophysical data over the region surrounding the initial Kuro manganese discovery has provided the Company with a substantial number of anomalous target areas that warrant drill testing," said Trek Metals CEO Derek Marshall.

"Encouragingly, many of these new chargeability and conductivity anomalies occur in a similar orientation to those that host the high-grade manganese defined to date at Kuro."

Why Does the IP Survey Matter at Kuro?

The technical basis for this phase of drilling is important. According to Trek, the company is using the geophysical response of the main Kuro mineralised zone as an analogue for target generation elsewhere across the basin.

That approach has some support from Phase 1 drilling. In Trek's 23 July 2026 announcement, the company reported that visual manganese mineralisation was observed in 43 of 51 holes drilled against IP chargeability anomalies. While visual estimates are not a substitute for laboratory assays, the reported hit rate suggests the IP method may be helping direct drilling toward concealed manganese zones.

The first batch of laboratory assay results from Kuro was reported on 6 August 2026, with additional Phase 1 assay batches expected in the near term. Trek said the second batch is expected within 1 to 2 weeks, and the final batch within 2 to 3 weeks from the date of the current announcement.

From an investor perspective, this matters because early-stage explorers often rely on geophysics to improve drill targeting efficiency. If the method continues to correlate with manganese mineralisation, the company may be able to test a larger search space with better focus.

Understanding Induced Polarisation in Simple Terms

IP surveying is a ground-based geophysical method used to detect buried rocks that respond to electrical current. In simple terms, a small electrical current is passed into the ground and the survey measures how different rock types store and release that charge.

Two important measurements are used:

• Chargeability: how strongly the ground holds electric charge after the current is turned off
• Conductivity: how easily electric current moves through the rocks

Some mineralised zones can stand out because they produce stronger chargeability or conductivity responses than surrounding rocks. At Kuro, Trek said the correlation between chargeability, conductivity and gravity response matches areas where manganese was visually observed or assayed in Phase 1 drilling.

Gravity data adds another layer. It helps identify differences in rock density below surface. Trek's gravity interpretation points to a low-density basin that may host the Kuro mineralisation and extends for roughly 30km.

For non-specialist investors, the practical takeaway is straightforward. Geophysics does not confirm an orebody, but it can help an explorer rank targets and place drill holes more effectively across a large area.

Glossary of Key Terms

The Scale Case Emerges with a ~30km Interpreted Basin

Perhaps the most important part of the update is not just the next drilling program, but the growing regional search space. Trek said the Kuro discovery is now interpreted to sit within a ~30km long prospective basin, based on preliminary merged residual gravity imagery.

That interpretation gives context to the company's recent work at Leviathan, where the IP crew has completed a GAIP grid targeting additional manganese mineralisation. Leviathan sits to the east of the existing Kuro drill area, within the same broader basin interpretation.

This does not confirm continuous mineralisation across the basin. However, it does expand the conceptual footprint of the target area well beyond the original discovery zone. Furthermore, for junior explorers, a widening search space can be material because it may increase the number of drill-ready targets and extend potential news flow.

"The under-explored nature of the greater Christmas Creek Project provides plenty of scope to build on the positive results we've seen to date, particularly as we continue to assess the potential for further manganese mineralisation within the now 30km long interpreted prospective basin," Marshall said.

Trek also described Kuro as a structurally controlled hydrothermal manganese system hosted in possible Neoproterozoic basin sediments over older basement rocks. In more accessible terms, the company believes mineral-rich fluids may have moved through structures in the basin and deposited manganese in favourable rock units.

Christmas Creek Is Advancing on Several Fronts

Although Kuro is the main focus of the latest update, the announcement also outlined activity across several other targets within the Christmas Creek Project. This broadens the company's near-term exploration agenda beyond manganese alone.

Martin Gold Prospect

A Sub-Audio Magnetics (SAM) survey is underway at the Martin gold prospect. Trek said this work is co-funded under the WA Government's Exploration Incentive Scheme and is designed to identify key mineralised structures for future drill targeting.

Historical drilling by Newmont at Martin returned results that include:

• 7m at 4.9g/t Au, including 1m at 29.6g/t Au
• 2m at 9.65g/t Au

These are historical exploration results referred to in Trek's project background and provide context for the prospect's existing gold potential.

Coogan Copper-Gold Prospect

Drilling is currently in progress at the Coogan copper-gold prospect, targeting a recently identified IP chargeability anomaly beneath historical sulphide-bearing drilling.

Historical Newmont results at Coogan cited in Trek's project background include:

• 34m at 0.18g/t Au
• 38m at 0.16g/t Au
• 30m at 0.15g/t Au

The grades are modest, but the widths suggest Trek is testing a broad mineralised system rather than a narrow high-grade target.

Regional Drilling and Surveys

Trek also reported that 17 regional holes for 1,894m have been completed, testing early-stage rare earth, gold and copper-gold soil anomalies. In addition, a fixed-wing magnetic and radiometric survey is scheduled to start in the coming weeks, and additional mapping and soil sampling are about to commence.

For investors, the benefit of this portfolio approach is clear. Christmas Creek is generating several streams of exploration news across different commodities, all within a project held 100% by Trek.

What Might Investors Watch Next?

The announcement provides a relatively clear sequence of near-term catalysts. Several of these could shape market interest over the coming weeks.

Key items to watch include:

1. Start of Phase 2 Kuro drilling, targeting immediate extensions and new anomalies
2. Remaining Phase 1 Kuro assay results, due progressively
3. Results from Coogan drilling, which is already underway
4. Completion of the fixed-wing magnetic and radiometric survey
5. Martin SAM survey interpretation, which may define future gold drill targets
6. Regional mapping and soil sampling, which could generate further targets

The main investment relevance is the concentration of potential news flow. Explorers can attract attention when they move from isolated results to a structured pipeline of drilling, assays and target generation.

Why Does This Update Stand Out for Trek Metals?

This announcement points to a company trying to build scale around an early manganese discovery while keeping several other exploration fronts active. The geophysical program at Kuro appears to have expanded the target inventory materially, and the interpreted ~30km basin gives Phase 2 drilling a larger regional context.

At the same time, caution remains warranted. Kuro is still at the exploration stage, true widths are not yet known, and no Mineral Resource has been estimated. Visual mineralisation observations are useful field indicators, but laboratory assays remain the key test.

Even so, according to the announcement, Trek enters the next phase with several supportive factors:

• IP targeting that previously correlated with visual manganese in 43 of 51 holes
• A broader interpreted basin that may host additional manganese targets
• Immediate drilling activity at Kuro
• Pending assays from Phase 1
• Active exploration at Martin and Coogan
• Full ownership of the Christmas Creek Project

For investors following ASX manganese stocks, Western Australian mineral exploration, or emerging Christmas Creek manganese developments, Trek Metals has set up a period of active exploration reporting. The next set of assay and drilling updates should provide a clearer indication of whether Kuro develops from an encouraging discovery into a larger manganese system.

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