Summary:Legacy Minerals launches 4,000m diamond drilling at the Emu copper-gold site within NSW’s Mt Carrington caldera, testing high-potential porphyry copper-gold targets for the first time in 50 years....
Legacy Minerals (ASX:LGM) has officially kicked off diamond drilling at its flagship Emu copper-gold site, marking the first modern exploration program on this historic prospect in nearly 50 years. Located within the resource-rich Mt Carrington caldera in northern New South Wales, the new 4,000m diamond drilling campaign targets two high-grade porphyry-epithermal zones identified via advanced airborne Mobile MT geophysical surveys. As copper demand surges for clean energy infrastructure, this drill program unlocks untapped copper-gold potential alongside the project’s existing 1.2Moz AuEq mineral resource, delivering major growth upside for Legacy Minerals’ regional mineral portfolio.
Project & Drilling Program Core Details
The Emu Prospect sits on the same mineralised caldera margin that hosts Mt Carrington’s established gold-silver deposits, but historical shallow exploration overlooked deep porphyry copper mineralisation at depth. After integrating 50 years of legacy geological data, AI target modelling and high-resolution geophysics, Legacy Minerals secured full NSW government approvals to launch the comprehensive drill campaign.
Table 1: Key Specifications for Emu Copper-Gold Drilling Programme
| Parameter | Official Project Data |
|---|---|
| Total drill footage | 4,000m diamond core drilling |
| Drill holes & pads | 8 drill holes across 5 dedicated drill pads |
| Maximum hole depth | 500m per borehole |
| Primary drill targets | Emu Porphyry Core, Emu Alteration Halo SE |
| Drill duration | 3 calendar months (June – September 2026) |
| Deposit model target | Porphyry-epithermal copper-gold system |
| Location | Mt Carrington Project, Northern NSW Lachlan Fold Belt |
[Table Placeholder: Table 1 – Emu copper-gold drilling campaign technical parameters]
The two priority drill targets represent a classic mineralised system architecture. The deep Emu Porphyry Core shows strong low-resistivity geophysical signatures pointing to intrusive mineralised bodies, while the shallow Emu Alteration Halo SE features wide silicified alteration zones linked to surface copper-gold geochemical anomalies. Diamond core drilling is selected for the program to retrieve intact rock samples, enabling precise grade analysis and structural mapping of deep subsurface mineralisation.
Geological Significance of the Emu Copper-Gold Target
The entire Mt Carrington region lies within the Lachlan Fold Belt, one of Australia’s most prolific copper-gold metallogenic provinces, home to tier-one deposits including Cadia and Northparkes mines. For decades, regional exploration focused primarily on silver and shallow gold at Mt Carrington, leaving large-scale porphyry copper potential underexplored at the Emu site.
Legacy Minerals’ airborne geophysical and AI targeting work confirmed coincident structural, geochemical and conductivity anomalies across the Emu trend, confirming it as a high-impact greenfield copper-gold discovery target. Unlike shallow historical sampling, the new deep drilling design will test the root feeder zones of the porphyry system, which globally host large-tonnage, long-life copper-gold deposits critical for EV and renewable energy supply chains.
Strategic Value for Legacy Minerals
Launching drilling at the Emu copper-gold site advances Legacy Minerals’ dual exploration strategy, balancing gold-silver resource expansion with new copper discovery to diversify its commodity exposure. If drilling intercepts significant copper-gold mineralisation, the Emu zone will materially expand the Mt Carrington resource base and strengthen the company’s appeal to mineral investors focused on critical transition metals.
The phased drill schedule minimises production disruption at adjacent operating prospects, with geochemical assay results scheduled for release in batches through Q3 2026. Upon positive intercepts, Legacy Minerals will immediately design follow-up resource definition drilling to delineate strike and depth extensions of mineralisation.
Conclusion
[Image Placeholder 2: Diamond drill rig in operation at Emu prospect site | Figure 2 – Core drilling equipment for porphyry copper-gold exploration]The commencement of drilling at Legacy Minerals’ Emu copper-gold site is a landmark exploration milestone for northern New South Wales’ Mt Carrington Project. This 4,000m diamond drill program delivers the first modern deep test of underexplored porphyry copper-gold targets after half a century of limited surface work. Backed by advanced geophysics and AI target modelling, the campaign has strong potential to unlock large new copper-gold resources, diversify Legacy Minerals’ mineral inventory and capitalise on global long-term copper demand driven by the energy transition. Industry stakeholders will closely monitor upcoming assay results to assess the district’s expanded mineral discovery potential.
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