Infinity Mining Doubles Gold Footprint to 1km With Second High-Grade Target Emerging
Key Takeaways
- New soil sampling has doubled the gold anomaly strike length at Tanjil Dome to approximately 1km, with the gold distribution broadly overlapping the previously defined antimony-arsenic geochemical system — a spatial relationship the joint venture considers indicative of a larger hydrothermal system.
- A second standalone target, Good Hope Prospect, has been defined 3km east of Tanjil Dome, returning a surface grab sample of 12.91 g/t Au from a historical shaft mullock dump and an anomalous geochemical corridor extending at least 1.5km.
- Trench mapping and sampling at both prospects is planned to commence by October 2026, with the programme of works already approved and the environmental bond paid, reducing near-term regulatory risk.
- Exploration is being conducted in Joint Venture with Mining One Consultants within Victoria's Melbourne Zone — the same geological address as Sunday Creek (SX2) and the Costerfield gold-antimony mine (ALK).
- Anomalous gold responses identified north and northwest of the main Tanjil Dome grid suggest the mineralising system may extend beyond the currently defined 1km footprint, with extensional soil sampling lines included in the planned work sequence.
Gold-antimony footprint doubles to 1km at Tanjil Dome as Good Hope emerges as second major target
New soil sampling results have doubled the gold anomaly strike length at the Tanjil Dome project in Victoria to approximately 1km, marking a significant step forward in the district-scale story developing at Infinity Mining (ASX: IMI). A second standalone target, the Good Hope Prospect located ~3km east, has simultaneously been defined, returning a surface grab sample of 12.91 g/t Au and an anomalous geochemical corridor extending at least 1.5km. Exploration at both prospects is being conducted in Joint Venture with Mining One Consultants, within Victoria’s Melbourne Zone, the same geological address as the Sunday Creek project (Southern Cross Gold, ASX: SX2) and the Costerfield gold-antimony mine (Alkane Resources, ASX: ALK).
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Q1 exploration results build a district-scale picture
Tanjil Dome — 1km gold anomaly confirmed
The latest gold-in-soil results have extended and confirmed a coherent gold footprint across approximately 1km at Tanjil Dome. Critically, this gold distribution broadly corresponds with the previously defined antimony-arsenic geochemical anomaly, a spatial relationship the joint venture considers geologically significant because it points to a larger hydrothermal system rather than an isolated stibnite occurrence.
Recent surface sampling also returned a result of 3.70 g/t Au from a float quartz breccia sample at Tanjil Dome (sample AP010826_GRAB-001, confirmed in Appendix 3). This adds to the previously reported high-grade surface rock results of up to 48.7% Sb and 1.35 g/t Au, announced on 27 July 2026, and provides further evidence that significant gold grades occur at surface across multiple locations within the system.
The Walhalla South antimony discovery confirmed the initial high-grade surface signal that set the broader Victorian exploration programme in motion, providing the foundation on which the Tanjil Dome and Good Hope targets are now being advanced.
Additional anomalous gold responses have also been identified to the north and northwest of the main target area, suggesting the broader mineralising system may extend well beyond the currently defined grid.
The central Tanjil Dome area hosts a convergence of geological features that underpin the exploration case:
- Massive stibnite veins
- Quartz-stibnite veining
- Laminated gold-bearing quartz veins
- Stibnite-bearing breccias
- Altered dyke material
Good Hope Prospect — high-grade gold and historical workings 3km east
Good Hope has been defined as a newly identified, standalone exploration target approximately 3km east of Tanjil Dome. Systematic surface sampling has outlined an anomalous geochemical corridor extending at least ~1.5km, and a surface grab sample from a shaft mullock dump returned 12.91 g/t Au (sample 25001, Appendix 3, Gecko Laboratory 50g fire assay method, quartz veining description confirmed).
The association with historical hard-rock workings is a meaningful geological signal. It indicates that historical miners recognised mineralisation along this trend, yet the area has received little to no systematic modern exploration, creating a clear opportunity for follow-up work.
Five converging factors make Good Hope a high-priority standalone target:
- High-grade gold at surface (12.91 g/t Au)
- An anomalous trend extending at least ~1.5km
- Historical hard-rock workings confirming early recognition of mineralisation
- Favourable structural setting
- Minimal modern systematic exploration
Cameron Petricevic, Executive Chairman
“What initially began with the discovery of high-grade antimony at surface has progressively developed into a much broader gold-antimony exploration story.”
“The emergence of multiple targets across the project substantially increases the exploration opportunity and gives the Joint Venture a growing pipeline of targets for systematic follow-up.”
Understanding gold-antimony systems — why geological coincidence matters
A hydrothermal gold-antimony system forms when hot, mineral-rich fluids circulate through rock fractures, depositing metals as they cool. Gold and antimony commonly travel together in these fluids, so finding both elements spatially overlapping at surface is a meaningful signal rather than coincidence. It suggests a single, larger mineralising event rather than two unrelated occurrences.
Soil geochemical anomalies are surface indicators created by weathering of underlying mineralisation. When rock breaks down, trace metals disperse into the soil above. Detecting elevated gold or antimony values in systematic soil sampling suggests potential mineralisation exists at depth, though it is important to note that an anomaly is not a deposit. Tanjil Dome and Good Hope remain at an early exploration stage: the scale of the geochemical response is encouraging, but continuity of mineralisation at depth has not yet been demonstrated.
Victoria’s Melbourne Zone is an established gold-antimony province. Sunday Creek (SX2) and Costerfield (ALK) are real-world examples of structurally controlled gold-antimony systems operating in this same geological setting. These projects provide geological context for the style of mineralisation Infinity Mining is targeting, without implying any equivalence to IMI’s current early-stage results.
The joint venture is also using arsenic measured by portable X-ray fluorescence (pXRF, a handheld device that analyses elemental chemistry on-site) as a proxy targeting tool for gold. Gold shows a strong correlation with arsenic in soils in this style of mineralisation, meaning elevated arsenic readings help geologists identify priority areas to focus further work. The pXRF arsenic dataset has confirmed strong anomalies over both the Tanjil Dome prospect and the Good Hope target.
Stuart Hutchin, Geology Manager, Mining One
“The gold anomaly is not occurring independently of the previously defined antimony and arsenic system.”
“The 1km gold footprint indicates that the hydrothermal system is considerably larger than the original surface stibnite occurrence.”
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What comes next — trenching, drilling programs and an expanding target pipeline
Work programs are being accelerated based on these results, with trench mapping and sampling at both Tanjil Dome and Good Hope planned to commence by October 2026. The programme of works is already approved and the environmental bond has been paid, reducing near-term regulatory risk.
The planned work sequence is:
- Trench mapping and sampling at Tanjil Dome and Good Hope
- Continued extensional soil sampling lines
- Commencement of baseline environmental sampling
- Development of an initial Exploration Target at Tanjil Dome
- Planning of initial drilling programmes at both prospects
Trenching results will inform vein orientations and structural continuity, feeding directly into drill programme design. The next catalysts for investors are clearly defined: trench mapping and sampling planned to commence by October 2026, followed by drill target definition at both prospects.
Separately, Infinity Mining received $171,000 in cash from a recent sale of EG1-ASX shares, a minor liquidity addition noted in the announcement.
| Prospect | Anomaly Strike | Peak Surface Grade | Next Step |
|---|---|---|---|
| Tanjil Dome | ~1km | 3.70 g/t Au (float quartz breccia) | Trench mapping and sampling, planned to commence by October 2026 |
| Good Hope | ~1.5km | 12.91 g/t Au (shaft mullock, quartz veining) | Trench mapping and sampling, planned to commence by October 2026 |
The identification of Good Hope as a second major target materially changes the scale of the Tanjil Project. Infinity Mining is no longer working a single isolated stibnite occurrence. It is building out a district-scale gold-antimony exploration portfolio with multiple prospective centres, a clear programme of work to advance both targets, and defined milestones that will determine the path to initial drilling.
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