Legacy Minerals Targets Major Gold-Copper Systems at Thomson Project
Legacy Minerals (ASX: LGM) has resumed its high-impact drilling program at the Thomson Project in NSW, focusing on large-scale gold-copper targets with world-class discovery potential across its 5,500km² belt-scale project.
Drilling Campaign Targets Significant Anomalies with Promising Early Results
Legacy Minerals has recommenced drilling at its Thomson Project after regional flooding, with the company now targeting the Cut-B Anomaly following the successful testing of the F4 Anomaly. The project features multiple coincident magnetic and gravity anomalies that share geological similarities with major intrusion-related gold-copper (IRG-Cu) discoveries in Australia.
CEO Christopher Byrne highlighted the significance of the current campaign:
"We are pleased to recommence our high-impact drilling at the Thomson Project following recent regional flooding. After the successful test of the F4 gravity and magnetic anomaly, our current focus is the Cut-B target; one of many discovery opportunities within the 5,500km² tenement at Thomson. Since 2011, the understanding of intrusion-related gold and copper systems has advanced significantly, with major discoveries in the past decade, including Hemi, Havieron, and Winu, proving their world-class potential."
Historical drilling at Cut-B, which only targeted the magnetic anomaly and missed the gravity anomaly, encountered significant alteration and promising mineralisation, including:
- 1m at 6.73g/t Au from 370m
- 1m at 497g/t Ag and 0.13% Nb from 392m
- 0.7m at 0.5% Cu, 112g/t Ag, 4.2% Zn and 0.4% Sn from 411m
The current drilling program represents the first test of the gravity anomaly at Cut-B, which can indicate increased sulphide abundance associated with an intrusive system – a key indicator of potential gold-copper deposits.
Emerging Thomson Project Demonstrates Significant Scale
Recent assay results from the Cut-A Anomaly have returned broad mineralised zones including:
- 377m at 0.1g/t Au from 225m including:
- 11m at 0.8g/t Au from 287m
- 41m at 0.4g/t Au from 420m with higher-grade sections of:
- 8m at 0.5g/t Au from 420m
- 15m at 0.65g/t Au from 446m
The Cut-A anomaly extends over a strike length of approximately 1,000m, featuring coincident magnetic and gravity anomalies. Previous drilling encountered approximately 480m of silica-carbonate altered meta-siltstone with quartz veins containing pyrite and pyrrhotite.
These mineralised zones display geochemical signatures consistent with reduced intrusion-related gold systems, including correlations between gold and bismuth/tellurium in quartz veins, along with elevated arsenic, tin, and tungsten.
Understanding Intrusion-Related Gold and Copper Systems
Intrusion-related gold-copper systems represent some of the most significant mineral discoveries in recent years. These systems form when mineral-rich fluids from cooling magmatic intrusions penetrate surrounding rocks, depositing metals along fractures and in favourable host rocks.
Key indicators of these systems include:
- Coincident geophysical anomalies – Magnetic features often indicate the presence of magnetic minerals like pyrrhotite, while gravity anomalies can suggest dense mineral concentrations such as sulphides
- Extensive alteration zones – Wide halos of silica, albite, tourmaline, and biotite alteration surrounding mineralisation
- Distinctive geochemical signatures – Associations of gold with bismuth, tellurium, and sometimes copper, silver, tungsten, and tin
The Thomson Project displays all these characteristics, suggesting potential for large-scale gold-copper mineralisation similar to recent major Australian discoveries like Winu (2.8Mt Cu, 8Moz Au, 51Moz Ag) and Havieron (7Moz Au, 0.3Mt Cu).
Strategic Position in an Underexplored Mineral Belt
The Thomson Project is strategically located in the Thomson Orogen near the interpreted contact with the Lachlan Fold Belt and Delamerian Orogen. Despite sedimentary cover ranging up to 280m thick, the basement geology is interpreted to be similar to the highly endowed Lachlan Orogen, which hosts more than 80Moz gold and 13Mt copper.
The potential of this area has been further validated by Red Hill Minerals (ASX: RHI), led by Joshua Pitt, which recently acquired a historical royalty over part of the Thomson Project.
Upcoming Catalysts and Timeline
The current drilling program represents a significant step in testing Legacy Minerals' large-scale targets. With drilling at the F4 Anomaly now completed and core processing underway, results are expected within 6-8 weeks.
Additionally, the company has announced plans for further sampling of previously unsampled sections at Cut-A, which could provide additional insight into the extent of mineralisation.
Why Investors Should Take Notice
Legacy Minerals presents a compelling investment opportunity in the mineral exploration sector for several key reasons:
- Scale of opportunity – The 5,500km² Thomson Project contains multiple large-scale "bullseye" magnetic and gravity anomalies that remain largely untested
- Geological similarities to major discoveries – The project shares characteristics with other major IRG-Cu districts, such as the Paterson Province in WA, home to Winu and Havieron
- Early indicators of success – Initial drilling has already encountered extensive alteration and anomalous gold-copper values consistent with large intrusive systems
- Strategic land position – The company has secured a belt-scale position in an underexplored region with major discovery potential
- Validation from industry peers – Red Hill Minerals' acquisition of a royalty over part of the project provides third-party validation of its potential
Legacy Minerals has positioned itself at the forefront of exploration in an emerging mineral province, applying modern exploration techniques and geological models to targets that have historically been overlooked due to sedimentary cover. With multiple high-impact drilling campaigns underway and a pipeline of additional targets, the company offers significant upside potential as it pursues a major gold-copper discovery.
Are You Ready to Explore Legacy Minerals' Gold-Copper Potential?
Discover why Legacy Minerals is targeting multiple high-potential gold-copper systems across its 5,500km² Thomson Project. With promising drill results already indicating mineralised zones consistent with intrusion-related gold systems and geological similarities to major Australian discoveries like Havieron and Winu, now is the time to consider this emerging opportunity. For comprehensive information about Legacy Minerals' projects, strategy and investment potential, visit www.legacyminerals.com.au today.
