New Assays Validate Large-Scale Copper-Zinc-Lead-Silver Discovery in South Australia
Lincoln Minerals Limited (ASX: LML) has confirmed the presence of a continuous, multi-metal sulphide system extending over 7 kilometres at its Minbrie Project in South Australia. Recent laboratory assay results from previously unsampled historic drill core have validated a coherent copper-zinc-lead-silver mineralisation system that remains open in multiple directions.
The systematic re-assaying program has revealed significant mineralisation within key stratigraphic horizons, strengthening the company's geological model and confirming the project's potential to host a large-scale base metals discovery.
"These results confirm that Minbrie hosts a continuous, multi-metal sulphide system stretching over 7km, which remains open in multiple directions," said Lincoln Minerals' CEO Jonathon Trewartha. "By re-assaying the historic core, we've unlocked significant copper, zinc, lead, and silver potential at minimal cost and in rapid time."
Key Findings Reveal Multiple Mineralised Zones
The latest assay results build on previously reported intercepts and have identified several significant zones of mineralisation, including:
- 0.3m at 0.18% copper, 2% zinc, 4.6g/t silver from 451-451.3m (BUDD100)
- 0.7m at 3.1% zinc, 0.46% lead from 201.3-202m (BUDD179)
These new results complement the previously announced discovery hole intercept from BUDD192:
- 29.5m at 0.8% copper, 7.5% lead, 1.9% zinc, 9g/t silver from 131.1m, including:
- 12m at 1.4% copper, 12.4% lead, 2.1% zinc, and 13g/t silver from 139m
- 1m at 4.8% copper, 31% lead, 3.1% zinc, and 36g/t silver from 145m
- 3m at 1.7% copper, 19.4% lead, 2.0% zinc, and 17g/t silver from 156m
The mineralisation occurs within favourable stratigraphic horizons—specifically, calcsilicate/dolomite units and key structural fluid pathways such as the Upper Katunga Transitional Zone and Mylonite Shear Zone—reinforcing the interpretation of a robust, multi-phase sulphide system.
Understanding Volcanogenic Massive Sulphide (VMS) Deposits
The mineralisation style at the Lincoln Minerals Minbrie Project aligns with characteristics of Archean VMS (volcanogenic massive sulphide) and/or SedEx deposits. VMS deposits form through hydrothermal processes on or near the seafloor, where metal-rich fluids precipitate sulphide minerals.
These deposits typically contain copper, zinc, lead, gold, and silver in varying concentrations and are often found in clusters or "camps," making them valuable exploration targets. The presence of multiple sulphide zones within key stratigraphic horizons at Minbrie is consistent with this deposit type.
VMS deposits are particularly valuable because they often contain high-grade mineralisation and multiple metals that can be extracted simultaneously, improving project economics. The association with deep-tapping faults and intrusive rocks at Minbrie further supports this interpretation.
Strategic Location With Infrastructure Advantages
The Lincoln Minerals Minbrie Project benefits from an exceptional location in South Australia's highly-regarded mining jurisdiction, situated just 25km from key regional infrastructure and approximately 265km from the Port Pirie Smelter.
South Australia consistently ranks among the top global mining investment destinations due to its stable permitting environment and supportive regulatory framework. The project's location on the Eyre Peninsula in the Gawler Craton—a region known for hosting world-class deposits including Olympic Dam, Prominent Hill, and Carrapateena—adds to its prospectivity.
Lincoln Minerals holds 100% ownership of all metals rights excluding iron at the project, providing clear development pathways should exploration continue to yield positive results.
Imminent High-Impact Exploration Program
Lincoln Minerals has outlined plans for a high-impact exploration program in Q4 2025, focusing on target refinement based on the improved geological understanding gained from the recent assay results.
The company's deliberate, data-driven approach has resulted in the definition of multiple high-priority drill targets across the northern area of the project. The upcoming program will focus on areas with the greatest potential for thicker, higher-grade accumulations along strike and at depth.
"This positions Minbrie as a potential large-scale multi-metal discovery in an underexplored district, giving us a clear runway to target thicker, higher-grade zones as we move into our high-impact drilling program next quarter," Trewartha added.
Why Investors Should Monitor Lincoln Minerals
The Minbrie Project represents a compelling investment opportunity in the base metals space for several key reasons:
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Scale potential: The confirmation of a continuous 7km mineralised system indicates the potential for a significant resource base.
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Multi-metal exposure: The copper-zinc-lead-silver mineralisation provides exposure to multiple in-demand metals, potentially enhancing project economics.
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Strategic location: Proximity to established infrastructure in a tier-one mining jurisdiction significantly reduces development risks and potential capital requirements.
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Systematic exploration approach: Lincoln's methodical re-evaluation of historical data has rapidly advanced the project at minimal cost, demonstrating effective capital allocation.
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Near-term catalysts: With drilling planned for Q4 2025, investors can anticipate a steady flow of news as the company advances its exploration program.
As global demand for copper and other base metals continues to grow driven by electrification and decarbonisation trends, the Lincoln Minerals Minbrie Project offers investors exposure to a potential large-scale discovery at an early stage. The company's broader portfolio, which includes graphite, magnetite, and uranium assets, provides additional optionality across multiple critical minerals markets.
With drilling results expected in the coming months and the project's scale continuing to expand, Lincoln Minerals represents an opportunity to gain exposure to a potentially significant base metals system in one of Australia's premier mining jurisdictions. Furthermore, the company has joined other exploration firms like HTM Mt Fisher that are actively building their mineral portfolios in strategic Australian locations.
Similar to how Lucapa secured a majority stake in its diamond project, Lincoln's 100% ownership of metals rights at Minbrie provides shareholders with maximum exposure to potential discoveries. The systematic approach at Minbrie resembles Metal Bank's success in increasing resource estimates through methodical exploration.
Recent exploration success at the Lincoln Minerals Minbrie Project echoes promising results seen at Sunshine Metals' Tigertown project, where targeted drilling has yielded significant mineralisation. Additionally, investors watching the base metals space should note that companies like S2 Resources are also launching major drilling campaigns across Australia, highlighting the current exploration momentum in the sector.
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