What Tali Resources' (ASX:TR2) Aircore Drilling Reveals About West Arunta Copper Potential

Sonal Goyal

03 November 2026 10:24 PM AEDT

What Tali Resources' (ASX:TR2) Aircore Drilling Reveals About West Arunta Copper Potential

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Key Highlights

Gibson West returned 5m at 894ppm Cu including 1m at 1,500ppm Cu, indicating sediment-hosted copper prospectivity
Chilka West alteration zone identified as prospective for orogenic gold with follow-up planned for 2027
Chilka East returned enriched platinum group elements in mafic and ultramafic lithologies
Hutt returned anomalous silver, lead and zinc with 8m at 0.4 g/t Ag, 917ppm Pb and 1,080ppm Zn

Shallow Drilling Opens Multiple Commodity Threads

Tali Resources Ltd (ASX:TR2) has returned composite assay results from a 72-hole, 3,961-metre aircore drilling program across its West Arunta Project in Western Australia, with results spanning copper, gold, platinum group elements and base metals. Announced on 28 October 2026, the program covered five targets — Caspian East, Chilka, Gibson West, Hutt and Lonar East — and delivered geological signals that are reshaping the company's 2027 exploration priorities.

The headline result came from Gibson West, where aircore drilling intercepted highly anomalous copper in sedimentary host rocks. Hole 26WAAC0030 returned 5 metres at 894ppm copper, including 1 metre at 1,500ppm copper. The result points toward a sediment-hosted copper system — the same style of deposit that hosts some of the world's most significant copper accumulations in Central Africa's Copper Belt — and has been flagged as the priority follow-up target for 2027 drilling at the project.

Chilka West and Gold System Potential

At Chilka West, the two most southerly holes intersected strongly altered dioritic intrusives bearing calcite, chlorite, epidote and oxidised pyrite. The alteration assemblage is consistent with hydrothermal fluid pathways associated with orogenic gold systems, the predominant gold deposit style found in Western Australia's major gold camps. Tali's management has identified this structure as a 2027 exploration priority, with further work planned to test the potential for gold mineralisation around the altered intrusive body.

At Chilka East, geochemical anomalism in platinum group elements was encountered in mafic and ultramafic lithologies, opening a separate line of inquiry into magmatic nickel-copper-PGE mineralisation — a commodity theme increasingly relevant to battery Supply chains.

Hutt Base Metals Signal

The Hutt prospect delivered anomalous base metals, with hole 26WAAC0063 returning 8 metres at 0.4 g/t silver, 917ppm lead and 1,080ppm zinc. Follow-up drilling at Hutt is planned for the current quarter as the company aims to test whether the geochemical anomalism reflects a coherent base metal system at depth.

Managing Director Rhys Bradley noted that collective results have "improved our geological understanding" and will inform the 2027 program across the West Arunta Project. He specifically highlighted the sediment-hosted copper potential at Gibson West as a priority, while flagging that the Chilka alteration observations and Hutt geochemistry also Warrant systematic follow-up.

Regional Setting and Geological Framework

The West Arunta Project sits in a part of Western Australia that has seen limited systematic modern exploration. Tali's drilling program was designed to test large-scale geophysical anomalies proximal to the Central Australian Suture, a major crustal structure, and second-order splays off it. The presence of anomalous copper in sedimentary sequences near structural corridors is consistent with models for sediment-hosted copper mineralisation, while the altered intrusives at Chilka are spatially associated with a splay off the main structure — a geological setting that commonly localises orogenic gold mineralisation.

Airborne gravity and magnetics data recently acquired over the project area is expected to further refine targeting ahead of the 2027 program.

Risks

All results are from shallow aircore drilling and represent geochemical anomalism rather than confirmed mineralisation at economic grades. Significant further drilling will be required to test whether any of the identified targets host substantial mineral deposits. The project is at an early exploration stage, and most targets remain open and untested at depth. Assay results from the current recommenced aircore drilling program are pending, which means the geological picture across several targets remains incomplete.

What to Watch Next

Near-term catalysts include assay results from the current recommenced aircore drilling program. The 2027 exploration plan, expected to be refined over coming months alongside historical data compilation and interpretation of the recent airborne geophysics, will also be closely watched. Priority follow-up drilling at Gibson West, targeting the sediment-hosted copper potential to the north and south of existing holes, represents the most material near-term value driver.

Sector Context

Sediment-hosted copper and orogenic gold are two of the most sought-after deposit styles in the current exploration cycle. Copper Demand projections tied to electrification have drawn renewed Capital into early-stage copper exploration globally, while Australia's established gold Mining infrastructure makes orogenic gold targets in Western Australia particularly attractive for development pathways. The West Arunta region remains relatively underexplored compared to the eastern goldfields and Pilbara, offering genuine discovery potential for companies with the geological patience to work through early-stage programs systematically.

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