Iltani Resources Confirms Mineralisation Across Three Zones at Orient
Key Takeaways
- ORR182 at Orient East returned 71m @ 81 g/t Ag Eq. from 133m, including 3m @ 435 g/t Ag Eq., with total silver equivalent exceeding 1,000 g/t Ag Eq. across the hole — confirming both grade and width continuity in the core zone.
- All four Orient West extension holes intersected multiple mineralised zones across a northeast strike corridor with over 700m of largely untested extent, making it the designated focus of the next drilling round.
- Vein 1 returned 24m @ 68 g/t Ag Eq. from 106m — significantly wider than the prior 2m–4m intersections — demonstrating the system can host greater tonnages than previously modelled.
- The 110-hole drilling program is 99 holes complete, with program finish expected within 2–3 weeks and an updated Mineral Resource Estimate targeted for Q4 2026, feeding into a Scoping Study in early 2027.
- Orient's existing resource stands at 62.5 Mt @ 81.5 g/t Ag Eq., containing 725 tonnes of indium — a critical mineral increasingly in demand for AI data centre optical transceivers.
Drilling delivers broad mineralisation across three zones at Orient
Iltani Resources (ASX: ILT) has received assay results from nine reverse circulation (RC) drill holes at the Orient Silver-Indium Project in North Queensland, described as Australia’s largest and highest grade known silver-indium project. The results confirm mineralisation extending across three distinct zones, each contributing to a growing resource picture.
The headline result comes from ORR182, which delivered an intercept exceeding >1,000 gm/t Ag and >1,000 gm/t Ag Eq., including a standout 71m @ 81 g/t Ag Eq. from 133m, including 3m @ 435 g/t Ag Eq. from 152m. Results of this scale confirm both the grade and width continuity that management says supports the potential for open pit mining.
The drilling campaign spans Orient East (infill and resource upgrade), Orient West (northeast strike extension), and Vein 1 (a target outside the existing resource boundary). With hole ORR239 underway, representing the 99th of 110 planned holes, the program is expected to complete in September 2026. An updated Mineral Resource Estimate (MRE) is expected in Q4 2026, feeding into a Scoping Study anticipated in early 2027.
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What the assay results show across Orient East, West, and Vein 1
Orient East — grade and width continuity confirmed
Four holes (ORR181, ORR182, ORR184, and ORR186) were completed at Orient East as part of an infill program designed to upgrade the core zone of mineralisation to Indicated Resource category. According to the announcement, results from these holes are “of similar or better magnitude than adjacent sections” and demonstrate dip and strike continuity at consistent grade and width.
ORR182 is the standout. The full intercept chain reads:
- 71m @ 81 g/t Ag Eq. from 133m, including 34m @ 129 g/t Ag Eq. from 134m, including 3m @ 435 g/t Ag Eq. from 152m
Additional Orient East intercepts from this program include:
- ORR181: 9m @ 150 g/t Ag Eq. from 128m, inc. 6m @ 196 g/t Ag Eq. from 129m
- ORR184: 6m @ 255 g/t Ag Eq. from 143m, inc. 2m @ 506 g/t Ag Eq. from 147m
- ORR186: 16m @ 146 g/t Ag Eq. from 88m, inc. 4m @ 348 g/t Ag Eq. from 89m
Once Orient East resource drilling is complete, the zone will have been drilled at 40m spacing over 520m strike and 450m down dip.
Orient West — strike extension returns mineralisation across all four holes
Four holes (ORR169, ORR171, ORR183, and ORR185) targeted the northeast extension of the current Orient West MRE, an area with over 700m of largely untested strike extent. All four holes intersected multiple mineralised zones, validating the NE extension thesis.
Results include:
- ORR169: 11m @ 101 g/t Ag Eq. from 45m and 23m @ 55 g/t Ag Eq. from 85m
- ORR171: 37m @ 51 g/t Ag Eq. from 140m
- ORR183: 15m @ 94 g/t Ag Eq. from 29m, inc. 2m @ 380 g/t Ag Eq. from 32m
- ORR185: 48m @ 69 g/t Ag Eq. from 16m, inc. 6m @ 108 g/t Ag Eq. from 36m
Given confirmed economic mineralisation continuing to the northeast, Orient West is the designated focus of the next round of drilling at Orient.
Vein 1 — wider intercept than expected adds resource growth potential
Vein 1 is a vein system striking approximately east-west over 750m, located less than 150m north of Orient East, with multiple historical workings along its length. The prior best result stood at 4m @ 584 g/t Ag Eq. from 219m in ORR119.
ORR188, the first hole reported from the current program at Vein 1, returned 24m @ 68 g/t Ag Eq. from 106m, significantly wider than previous intersections which generally ran 2m to 4m. The announcement states this demonstrates that Vein 1 can host greater tonnages than previously anticipated. The company plans to complete six shallow drill holes into Vein 1.
Donald Garner, Managing Director, Iltani Resources
“We are advancing toward completion of the current drilling program this month, and once all assays are received, updated Mineral Resource Estimates for Orient East and West will be completed in Q4 2026, feeding into the 2027 Scoping Study. Additional drilling is planned before the wet season to follow up mineralisation outside the existing resource areas.”
Understanding silver-indium mineralisation and why it matters
Silver equivalent (Ag Eq.) is a standard reporting metric that combines multiple metals into a single comparable unit. For Orient, the formula is: Ag Eq. = Ag + (Pb x 35.5) + (Zn x 50.2) + (In x 0.47), applied using the metal recoveries and commodity prices disclosed in the announcement (Ag: 87%, Pb: 90%, Zn: 85%, In: 85%). It allows investors to compare intercepts across different metals on a like-for-like basis.
Indium is the element that makes Orient strategically distinctive. Classified as a critical mineral, indium is most widely known as a component of indium tin oxide (ITO), used in touch screens. Its growing relevance lies in indium phosphide (InP), which is required to manufacture the laser chips powering high-speed optical transceivers in AI data centres, where it is replacing slower copper wiring for data transmission.
Orient’s existing resource — 62.5 Mt @ 81.5 g/t Ag Eq. (23 g/t Ag, 12 g/t In, 0.6% Pb and 0.7% Zn) — contains 725 tonnes of indium. The JORC Resource Estimate breakdown is as follows:
| Category | Tonnes (Mt) | Ag Eq. g/t | Ag (Moz) | In (tonnes) | Ag Eq. (Moz) |
|---|---|---|---|---|---|
| Indicated | 38.8 | 81.7 | 28.9 | 420 | 101.9 |
| Inferred | 23.7 | 81.2 | 17.0 | 306 | 61.9 |
| Total | 62.5 | 81.5 | 45.9 | 725 | 163.8 |
The current drilling is designed to expand and upgrade this resource, with Indicated Resource confidence targeted across the core Orient East zone ahead of the Scoping Study.
The maiden JORC resource estimate for Orient East established the geological foundation that subsequent infill drilling is now working to upgrade, with the current campaign targeting a reclassification of core mineralisation from Inferred to Indicated Resource category.
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Milestones ahead as Orient moves toward a resource update and Scoping Study
The drill rig is currently on hole ORR239, the 99th of 110 planned holes, with program completion expected within 2 to 3 weeks of the announcement date. Samples are submitted to Intertek’s Townsville laboratory every 2 to 3 days, with current assay turnaround running approximately 1 to 2 months.
The upcoming catalyst sequence, as outlined in the announcement, is:
- Completion of the initial 110-hole drilling program — September 2026
- Additional pre-wet-season drilling to follow up mineralisation outside the current resource areas
- Updated Orient Mineral Resource Estimates for East and West — expected Q4 2026
- Updated MRE feeds into the Orient Scoping Study — expected early 2027
- Future feasibility studies targeting an open pittable resource
The updated MRE is intended to upgrade the core mineralisation at Orient East to Indicated Resource category, providing greater confidence for the Scoping Study. The announcement does not disclose production timelines or project economics beyond the milestones listed above.
For investors exploring the capital structure supporting this program, our detailed coverage of the QIC funding round outlines the terms and strategic rationale behind the institutional backing that has helped fund the 110-hole drilling campaign now approaching completion.
Ready to Explore the Orient Silver-Indium Project in More Detail?
Iltani Resources is advancing Australia’s largest and highest grade known silver-indium project toward a major resource update, with three mineralised zones now confirmed and a Scoping Study targeted for early 2027.
For a closer look at the company’s drilling progress, resource potential, and critical mineral credentials, explore Iltani Resources on Discovery Alert to stay across upcoming milestones as the updated MRE approaches.