Infinity Mining Confirms High-Grade Antimony Discovery at Walhalla South

BY WILLIAM HADRIAN ON DECEMBER 15, 2025

Infinity Mining Ltd

  • ASX Code: IMI
  • Market Cap: $4,707,142
  • Shares On Issue (SOI): 523,015,777
  • Infinity Mining Exposes High-Grade Antimony Vein in Victoria's Melbourne Zone

    Infinity Mining Limited (ASX: IMI) has confirmed the presence of a quartz-stibnite vein at its Walhalla South Project in Victoria, directly at the location where previous rock chip sampling returned exceptional antimony grades of 21.6% to 51.4% Sb with associated gold values up to 0.88 g/t Au. This discovery strengthens the company's position in Australia's critical minerals sector.

    The project sits just 100 kilometres southeast of Southern Cross Gold's world-class Sunday Creek Gold-Antimony Project. Furthermore, the newly exposed laminated quartz-stibnite vein sits within a 1.5-kilometre diameter circular magnetic anomaly that appears never to have been drill-tested.

    This presents an immediate high-priority target for systematic exploration. The Infinity Mining antimony discovery represents a significant development in an increasingly supply-constrained critical metals market.

    Discovery Confirms Surface Mineralisation System

    Recent fieldwork has successfully exposed quartz-stibnite veining at the precise location of previously reported high-grade antimony rock chips. The exposed vein displays classic laminated textures typical of epizonal orogenic gold-antimony deposits, similar to those that have made the Melbourne Zone famous for multi-million-ounce resources.

    However, what makes this discovery particularly compelling is its location within an untested geological target. The discovery area benefits from excellent access via maintained forest tracks, with full support from State Forest managers enabling cost-effective exploration advancement.

    Key Discovery Highlights:

    • Direct confirmation of stibnite-bearing structures at surface

    • Laminated quartz-stibnite veining exposed through recent field investigations

    • Additional rock chip samples collected with assays pending

    • Systematic soil sampling program now underway to define system extent

    Management Perspective on the Discovery

    "This latest fieldwork, confirming a quartz-stibnite veining right where we hit the pleasing 51.4% antimony rock-chip, provides a high priority target for Infinity. We are in an under-explored area of the Melbourne Zone, known for hosting multi-million-ounce gold antimony systems," stated Infinity's Chairman.

    In addition to the immediate exploration potential, the discovery validates the company's geological targeting methods. The correlation between high-grade surface sampling and confirmed mineralised veining demonstrates systematic exploration success.

    Strategic Location in Prolific Melbourne Zone

    The Walhalla South Extended (EL 7356) and Tanjil Bren (EL 7357) tenements occupy a prime position within Victoria's Melbourne Zone. The region sits immediately on strike from historic goldfields including the renowned Walhalla goldfield.

    This highly prospective region hosts some of Australia's most significant gold-antimony operations. Moreover, the geological framework has proven conducive to significant mineral discoveries throughout the region, establishing the area's credentials for hosting world-class deposits.

    Regional Context:

    • Sunday Creek Gold-Antimony Project (Southern Cross Gold) – world-class resource

    • Costerfield Gold-Antimony Mine (Alkane Resources) – active high-grade operation

    • Historic Walhalla goldfield – immediately adjacent to Infinity's tenements

    The tenements cover folded Silurian-Devonian marine sedimentary rocks intruded by Devonian granitoids. This creates ideal geological conditions for both intrusion-related gold systems and high-grade epizonal orogenic gold-antimony deposits.

    Consequently, the Infinity Mining antimony discovery sits within this established mineralised corridor. It benefits from decades of geological understanding while targeting previously untested magnetic anomalies that may host similar high-grade systems.

    Understanding Antimony: A Critical Strategic Metal

    Antimony is classified as a critical mineral by the Australian Government due to its essential role in defence applications and renewable energy technologies. The metal is crucial for flame retardants, lead-acid batteries, and advanced electronics.

    Furthermore, global supply is dominated by China, creating strategic supply chain vulnerabilities. The discovery of stibnite (antimony sulfide) mineralisation at Walhalla South positions Infinity to potentially contribute to Australia's critical minerals independence.

    Why Antimony Matters to Investors:

    • Critical mineral status ensures government support for development

    • Limited global supply outside China creates premium pricing opportunities

    • Essential for defence and renewable energy applications driving demand growth

    • High-grade discoveries rare making quality deposits extremely valuable

    Global Market Dynamics

    Antimony prices have experienced significant volatility in recent years, with Chinese export restrictions driving renewed focus on alternative supply sources. China controls approximately 60% of global antimony production, highlighting supply concentration risks.

    Global Antimony Market Context:

    • Strategic stockpiling by major economies increasing demand

    • Defence applications ensuring stable long-term demand

    • Battery technology creating new growth markets

    • Supply chain diversification driving premium valuations for non-Chinese sources

    The Infinity Mining antimony discovery aligns with Australia's critical minerals strategy, which prioritises domestic production of strategic metals essential for national security and economic independence.

    What Makes This Magnetic Target So Compelling?

    The antimony-gold discovery coincides with a distinctive 1.5-kilometre diameter circular magnetic high interpreted as a sub-vertical intrusion. Historical exploration review reveals this compelling target has never been drill-tested.

    This represents an immediate opportunity for resource discovery in an increasingly explored region. Most comparable magnetic anomalies in the Melbourne Zone have been tested through multiple drilling campaigns.

    Target Characteristics:

    • Circular magnetic anomaly suggesting intrusive source

    • High-grade surface sampling confirming mineralisation potential

    • Never drill-tested despite decades of regional exploration

    • Accessible location with established forest track access

    Soil profile investigations indicate conventional hand-auger sampling will successfully define the mineralisation orientation and extent. This provides cost-effective target refinement ahead of drilling.

    The magnetic signature suggests a significant geological feature at depth, potentially hosting extensive mineralised systems beyond the current surface expressions. The undrilled nature of this magnetic target represents a significant opportunity for discovery.

    Systematic Exploration Program Underway

    Infinity has commenced a systematic approach to advance the Walhalla South discovery, with immediate focus on defining the mineralised system through surface geochemistry. The company is engaging with forest managers and stakeholders to secure approvals for low-impact exploration activities.

    This methodical approach ensures rapid, cost-effective advancement while maintaining the social licence essential for long-term project development. The company's focus on systematic exploration follows best-practice approaches proven successful throughout the Melbourne Zone.

    Planned Activities:

    • Hand-auger soil geochemical program across the target area

    • Inspection and sampling of historic gold workings within tenements

    • Stakeholder engagement to maintain excellent land manager relationships

    • Target refinement ahead of future drilling programs

    Exploration Strategy and Timeline

    The soil sampling program aims to define the extent and orientation of the mineralised system. This provides essential geological information to optimise future drilling programs.

    This approach minimises environmental impact while maximising geological understanding. Such considerations are critical in Victoria's regulated exploration environment.

    However, the immediate focus remains on advancing surface geochemistry to define drill targets. The Infinity Mining antimony discovery requires systematic development to unlock its full potential.

    Investment Thesis: Critical Minerals Discovery in Proven Terrane

    The discovery represents a compelling investment opportunity combining critical mineral exposure with proven geological potential. Infinity has identified high-grade antimony-gold mineralisation in one of Australia's most prolific gold-antimony provinces.

    Moreover, an undrilled magnetic target provides immediate drilling upside. The project's location within 100 kilometres of Southern Cross Gold's Sunday Creek project provides valuable geological context.

    Key Investment Drivers:

    • Critical mineral exposure in government-supported antimony sector

    • High-grade discovery with 51.4% Sb surface samples

    • Proven geological terrane hosting world-class deposits

    • Undrilled magnetic target representing blue-sky potential

    • Excellent access and relationships enabling rapid advancement

    This proximity offers potential operational synergies and validates the geological prospectivity of Infinity's tenement package. Regional precedents demonstrate substantial resource potential for similar discoveries.

    Comparative Regional Analysis

    Sunday Creek Project: 3.4 million ounce Au equivalent resource

    Costerfield Mine: High-grade production averaging 5-8 g/t Au equivalent

    These regional precedents demonstrate the potential scale of deposits within the Melbourne Zone. Furthermore, they validate the geological setting for the Infinity Mining antimony discovery.

    Why Should Investors Track Infinity Mining?

    Infinity Mining has positioned itself as a critical minerals explorer with exposure to both antimony and copper through its diverse project portfolio. The portfolio spans over 3,700 km² across highly prospective Australian regions.

    The announcement confirms the Walhalla South discovery adds significant value to this portfolio. It provides exposure to Australia's critical minerals strategy and potential resource discovery.

    Compelling Tracking Reasons:

    • Critical minerals exposure through high-grade antimony discovery

    • Diverse portfolio spanning copper, gold, and lithium across proven terranes

    • Binding cooperation agreement for patented copper processing technology at Cangai

    • Strategic tenement positions in NSW's Macquarie Arc and Victoria's Melbourne Zone

    • Systematic exploration approach maximising discovery potential per dollar invested

    With systematic soil sampling underway and drill targeting advancing, Infinity Mining offers investors exposure to potential resource discovery in Australia's critical minerals sector. The combination of high-grade surface results, untested drill targets, and excellent project access creates a compelling near-term catalyst pipeline.

    The company's methodical approach to exploration, combined with strong stakeholder relationships and government support for critical minerals development, positions Infinity well for potential value creation. The Infinity Mining antimony discovery has revealed high-grade antimony mineralisation in Victoria's prolific Melbourne Zone.

    The discovery features an undrilled magnetic target providing immediate drilling upside. As Australia prioritises critical minerals independence, Infinity's systematic exploration approach positions the company to capture significant value from potential antimony-gold resource discovery.

    Could Your Portfolio Benefit from Critical Minerals Discoveries?

    Infinity's high-grade antimony discovery demonstrates why investors increasingly focus on critical minerals in proven geological terranes. Discovery Alert's proprietary Discovery IQ model instantly identifies such significant ASX mineral announcements, transforming complex geological data into actionable investment insights powered by advanced AI technology. Begin your 30-day free trial today at Discovery Alert to position yourself ahead of the market for the next major critical minerals discovery.

    Stock Codes: ASX: IMI

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    Discovery Alert does not guarantee the accuracy or completeness of the information provided in its articles. The information does not constitute financial or investment advice. Readers are encouraged to conduct their own due diligence or speak to a licensed financial advisor before making any investment decisions.

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