Iltani Resources Strikes High-Grade Silver at Orient East in ORR164

Iltani Resources Strikes High-Grade Silver at Orient East, Highlighted by Standout Intercept in ORR164

Iltani Resources (ASX: ILT) has reported fresh assay results from its ongoing 110-hole reverse circulation drilling campaign at the Orient Silver-Indium Project in Herberton, North Queensland. The Iltani Resources high grade silver at Orient East drill results cover holes ORR160 to ORR164 and ORR166, indicating that high-grade silver-lead-zinc-indium mineralisation is continuous, wide, and in places exceptionally rich.

According to the announcement, the standout result comes from ORR164, which intercepted two separate zones of high-grade massive sulphide mineralisation, both shallow enough to be relevant to open-pit mining studies. The best single-metre interval returned 1 metre at 398 g/t silver, 59 g/t indium, 8.4% lead and 19.1% zinc (1,683 g/t silver equivalent) from 58 metres downhole.

With 81 of the planned 110 RC holes now completed, representing 15,485 metres drilled, and assay results pending from multiple additional holes, the company appears positioned for a sustained flow of drilling news over coming months.

Orient East Takes Centre Stage: What the Drill Holes Are Telling Investors

The four Orient East holes covered in this release — ORR160, ORR162, ORR164 and ORR166 — were drilled on 40 metre section spacings through the central portion of the existing Mineral Resource. The results, as reported by Iltani, confirm strike continuity across multiple sections and provide the basis for the company to consider resource category upgrades.

A summary of the key material intercepts from Orient East is set out below.

A 30 g/t Ag Eq. lower cut-off has been applied; intersection widths are downhole.

The breadth and grade of these intercepts — particularly the dual-zone structure in ORR164 and the massive sulphide cores in both ORR164 and ORR166 — provide a strong signal regarding the scale and continuity of the mineralised system at Orient East.

ORR164: The Drill Hole Drawing Investor Attention

ORR164 is the result likely to draw the most investor scrutiny from this release. Drilled on Orient East Section 308800E alongside ORR160 and ORR162, it intercepted two broad, high-grade zones of mineralisation separated by a gap at depth.

Upper Zone:

• A broad intercept of 28m at 95 g/t Ag, 7 g/t In, 2.1% Pb and 2.9% Zn (317 g/t Ag Eq.) from 38m
• Including 14m at 176 g/t Ag, 13 g/t In, 3.9% Pb and 5.3% Zn (588 g/t Ag Eq.) from 50m
• Containing a high-grade core of 4m at 323 g/t Ag, 28 g/t In, 7.1% Pb and 10.2% Zn (1,099 g/t Ag Eq.) from 56m
• With a best single-metre result of 1m at 398 g/t Ag, 59 g/t In, 8.4% Pb and 19.1% Zn (1,683 g/t Ag Eq.) from 58m

Lower Zone:

• 30m at 38 g/t Ag, 1 g/t In, 0.7% Pb and 1.1% Zn (117 g/t Ag Eq.) from 92m
• Including 4m at 131 g/t Ag, 3 g/t In, 2.4% Pb and 4.7% Zn (451 g/t Ag Eq.) from 96m
• With a high-grade core of 1m at 292 g/t Ag, 8 g/t In, 4.9% Pb and 10.7% Zn (1,006 g/t Ag Eq.) from 98m

According to the announcement, the mineralisation in ORR164 remains open down-dip, and the company has already planned a follow-up drill hole to test this extension target. This open-ended geometry suggests the full extent of the system has not yet been defined by drilling.

Managing Director Donald Garner commented: "The intercepts in ORR164 are particularly impressive, delivering two wide intercepts of high-grade silver-lead-zinc-indium mineralisation with exceptional high-grade massive sulphide mineralisation at the core. The mineralisation intersected in ORR164 remains open down-dip, and we have planned a drillhole to test this high-priority area."

Understanding Silver Equivalent (Ag Eq.): What This Metric Means for Investors

Throughout the announcement, Iltani reports grades in terms of silver equivalent (Ag Eq.), a standardised metric combining the value of all payable metals into a single comparable figure. This approach is particularly relevant at Orient, where the deposit contains four commercially significant metals: silver, lead, zinc and indium.

How Is It Calculated?

Ag Eq. = Ag + (Pb x 35.5) + (Zn x 50.2) + (In x 0.47)

This formula incorporates commodity prices and estimated metallurgical recoveries for each metal, as set out below.

Why Does It Matter to Investors?

The Ag Eq. metric allows for comparison between intercepts and projects with different metal mixes. It also means an intercept such as ORR164's best result — which may look modest on silver content alone — becomes substantially more significant once lead, zinc and indium contributions are included.

Indium is a critical mineral used in semiconductor manufacturing and display screens, and Orient is described by the company as hosting one of the more notable indium endowments identified in Australia.

Glossary of Key Terms

• RC drilling (Reverse Circulation): A drilling method where rock chips are returned to the surface through an inner tube within the drill rod. It is generally faster and more cost-effective than diamond drilling and is the primary method used in this program.
• Ag Eq. (silver equivalent): A normalised grade metric combining all payable metals into one figure for comparison purposes.
• Massive sulphide: A rock type with a high concentration of sulphide minerals, such as galena and sphalerite. At Orient, the massive sulphide cores represent the highest-grade intervals within each intercept.
• Open down-dip: Describes mineralisation that has not been closed off at depth, indicating further grade and width potential may exist in deeper drilling.
• JORC Code: The Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves, the industry standard for resource reporting in Australia.
• Infill drilling: Drilling additional holes between existing drill holes to tighten the resource model and support higher-confidence resource classifications.
• Ag Eq. cut-off grade: The minimum silver equivalent grade used to define mineralised material. Iltani applies a 30 g/t Ag Eq. cut-off.

Orient West Adds Width: ORR161 and ORR163 Hit Multiple Zones

While the Orient East results dominate this release, results from Orient West holes ORR161 and ORR163 also returned consistent multi-zone mineralisation. The holes were drilled on Orient West Section 30, targeting an area of shallow mineralisation northeast of the established high-grade core.

Grades here are lower than at Orient East but are consistent with the broader Orient West resource profile. Furthermore, according to the announcement, recent test work has indicated that ore sorting may be a viable option to upgrade lower-tenor mineralisation, potentially making these broad shallow zones commercially relevant as part of a future open-pit operation.

What Comes Next: A Busy Drilling Pipeline

The drilling program is continuing. With 29 holes still to be completed from the 110-hole program, and assay results pending from a large number of already-completed holes, the company is entering a period expected to generate substantial additional data.

Near-term drilling priorities and activities include:

1. Orient East eastern extent: continuing to test along-strike extensions of mineralisation to the east
2. Down-dip testing at ORR164: a follow-up drill hole targeting the open-ended mineralisation confirmed in both the Upper and Lower Zones
3. Infill and step-out drilling at Orient East southern extent: the track rig will complete deeper holes and step-out drilling through the central and southern sections
4. Filling the gap between Orient East and West: identified as a priority to improve resource confidence and potentially link the two zones
5. Regional targets: including Vein 1, Orient North and the northeastern extent of Orient West
6. Diamond drilling for metallurgical test work: a diamond rig has mobilised to produce larger-diameter PQ core for ore-sorting trials at TOMRA in Sydney, with core to be composited into low, medium and high sulphide-content samples

Assay results continue to be submitted to the laboratory every two to three days, with the company anticipating a steady flow of results over coming months.

The Bigger Picture: Orient's Scale and Resource Base

Orient is described by Iltani as Australia's largest known silver-indium deposit, located approximately 120km southwest of Cairns in the Herberton Mineral Field — an area with a mining history dating to tin discoveries in 1880.

The project's current JORC-compliant resource base is set out below.

Orient East and West each carry their own resource estimates.

Beyond the current Mineral Resource, the company has also reported an Exploration Target of 35.9 to 43.3 Mt at 63.6 to 78.1 g/t Ag Eq., which Iltani intends to convert to Mineral Resources through further drilling. The potential quantity and grade of this Exploration Target is conceptual in nature. There has been insufficient exploration to estimate a Mineral Resource, and it remains uncertain whether further exploration will result in the estimation of a Mineral Resource.

Why Investors Are Watching Orient

Several factors combine to make the Iltani Resources high grade silver at Orient East drill results relevant beyond the individual assay figures.

• Grade and width: ORR164's dual-zone structure, with 28m and 30m wide high-grade intercepts at shallow to moderate depths, is directly relevant to open-pit mining economics, where intercept width carries as much weight as grade in bulk-mining scenarios.

• Open-ended geometry: Mineralisation in ORR164 remains open down-dip, and assays from other sections remain pending, meaning the resource envelope has not yet been closed off.

• Resource upgrade pathway: The company is tightening its drill spacing to 40m section intervals through the central resource area — a systematic infill approach that typically precedes the upgrading of Inferred material to Indicated status, a classification that carries greater weight in scoping and feasibility studies.

• Four payable metals: The combination of silver, lead, zinc and indium means the effective grade reported by Iltani is considerably higher than would be suggested by silver content alone. Indium, used in electronics and clean energy applications, adds a further dimension to the deposit's metal mix.

• Ore-sorting potential: Test work referenced in the announcement suggests ore sorting may help upgrade lower-tenor mineralisation at Orient West, consequently extending the economic reach of the broader resource base.

Want to Know More About Iltani Resources and the Orient Silver-Indium Project?

With high-grade drill results continuing to emerge from Orient East, a 62.5 million tonne JORC resource already in place, and a substantial drilling pipeline still to be completed, Iltani Resources (ASX: ILT) is generating considerable momentum at one of Australia's most significant silver-indium projects. Investors looking to dig deeper into the company's progress, project fundamentals, and upcoming catalysts can find full details at iltaniresources.com.au.