Lomiko Metals unveils high-grade graphite discoveries at Ruisseau with extended La Roche zone and 2025 drill program

Lomiko Metals Inc. (TSX.V: LMR), the Canadian graphite exploration and development company, has announced a significant update from its spring 2025 exploration program at the Ruisseau Graphite Project in Quebec. The announcement includes newly confirmed high-grade mineralization in the La Roche zone and outlines a 2,500-metre drilling campaign slated to commence in November 2025. These developments have bolstered institutional sentiment around Lomiko Metals’ broader graphite portfolio as global demand for battery-grade graphite continues to climb.

How did Lomiko Metals expand the La Roche graphite zone in the spring 2025 exploration results?

The exploration activities at Ruisseau revealed a dramatic expansion of the La Roche graphite zone—from its previously delineated 1,480-metre strike length in 2024 to an approximate 3,850 metres in 2025. Lomiko’s use of Beep-Mat prospecting and targeted rock sampling along airborne time-domain electromagnetic (TDEM) trends yielded several moderate to high-grade results. Individual samples returned graphite carbon (Cg) concentrations of up to 27.5%, underscoring the mineral potential across the project.

Specifically, 23 samples were collected along La Roche, with over half returning Cg grades above 15%, and several exceeding the 20% threshold. In terms of scale, the Beep-Mat detected surface conductivity over widths of up to 50 metres. This consistency of conductivity and grade along a nearly 4-kilometre extension has increased institutional confidence in the property’s scale and potential.

What geophysical and sampling evidence supports Lomiko’s drilling targets at Rune and La Roche?

At the Rune zone—La Roche’s parallel neighbor roughly 450 metres west—Lomiko has now delineated graphite-bearing structures over a 1,450-metre strike. Beep-Mat prospecting in 2025 showed conductivity across surface widths of up to 25 metres, with graphite grades peaking at 27.5% Cg and additional high-grade results from outlying float samples. Structurally, Rune and La Roche appear to lie on opposite limbs of a synform trending north-northeast, each exhibiting moderate to shallow dips and supporting a robust geophysical model for subsurface continuity.

In total, the spring 2025 program yielded 36 validated samples, with nearly 90% returning more than 1.0% Cg. These included 12 high-grade samples exceeding 20.0% Cg, reinforcing the rationale for a maiden drill program. The spatial distribution, grade consistency, and correlation with TDEM trends have enabled Lomiko to identify primary and secondary drill targets across both zones.

What are Lomiko Metals’ detailed plans for the fall 2025 drill program at the Ruisseau project?

Lomiko Metals has proposed a 2,500-metre drill campaign aimed at verifying the most promising graphite anomalies at both Rune and La Roche. The company has designated five primary and four secondary targets at Rune, and six primary and four secondary targets at La Roche, selected based on multi-year geophysical and sampling datasets spanning 2022 through 2025.

Permitting for the drill program is currently underway, with the expectation of initiating drilling in November 2025. The campaign will be the first comprehensive subsurface evaluation of the Ruisseau graphite zones and is expected to provide clarity on mineral resource continuity, flake size distribution, and deposit geometry—all of which are critical factors for downstream battery-grade graphite processing.

What is the broader geological context of Lomiko’s graphite findings in the Laurentian region?

The Ruisseau property lies in Quebec’s Laurentian Region, part of the Grenville Geological Province within the Canadian Shield—an area known for hosting coarse-grained flake graphite deposits. The graphitic mineralization at Rune and La Roche is typically hosted in paragneiss, accompanied by biotite and minor sulphides. These bands of mineralization demonstrate widths averaging 5 to 10 metres and extend longitudinally up to 200 metres.

The favorable metamorphic conditions of the Grenville Province have contributed to the formation of high-purity, flake-type graphite—exactly the class of material in high demand by lithium-ion battery manufacturers. Lomiko’s mineralized zones also exhibit structural predictability and appear to conform to folded geological patterns that can be extrapolated for future exploration beyond current claim boundaries.

How do analysts interpret Lomiko Metals’ graphite strategy in light of global battery supply chain trends?

With governments and automakers globally securing domestic sources of critical battery materials, institutional investors view Lomiko Metals’ graphite portfolio as increasingly strategic. The strong assay results from Ruisseau and the company’s intention to initiate drilling represent tangible de-risking steps. Analysts believe that the delineation of high-grade, flake-rich graphite zones across a scalable land package positions Lomiko favorably for future partnerships or offtake agreements.

Furthermore, analysts anticipate that the fall drill program could facilitate an inaugural mineral resource estimate at Ruisseau by 2026. The company’s demonstrated ability to advance projects through systematic geophysics, geochemistry, and now drilling provides validation for its graphite-centric development model.

What other graphite assets and resource updates support Lomiko Metals’ growth strategy in Quebec?

In addition to Ruisseau, Lomiko Metals holds the flagship La Loutre graphite project in southern Quebec. As per its May 2023 Mineral Resource Estimate, La Loutre hosts 64.7 million tonnes of Indicated Resources grading 4.59% Cg, containing an estimated 3.0 million tonnes of graphite. This represented a 184% tonnage increase over the 2021 estimate due to the success of the 2022 drilling campaign.

Beyond La Loutre and Ruisseau, Lomiko’s broader graphite portfolio includes six other early-stage projects—Tremblant, Meloche, Boyd, Dieppe, North Low, and Carmin—covering 328 claims over 18,622 hectares. High-grade spot results from these areas include 27.9% Cg at Ruisseau, 13.3% Cg at Meloche, and 17.10% Cg at Boyd, further enhancing the regional prospectivity.

The company also holds a 49% stake in the Bourier lithium project, adjacent to key players like Nemaska Lithium, and a promising antimony-gold-silver property named Yellow Fox in Newfoundland, which hosts grab samples grading up to 59.43 g/t Au and 11.10% Sb.

What is the expected impact of Lomiko’s fall 2025 drilling campaign on future graphite resource development?

Industry observers expect that successful drilling at Ruisseau could fast-track Lomiko toward defining an NI 43-101-compliant resource. Given the high grades, lateral continuity, and parallel structural trends across Rune and La Roche, the fall 2025 campaign could result in a significant graphite inventory addition, complementing the company’s existing La Loutre resource base.

Should drill results mirror surface assay trends, the company may also consider advancing metallurgical testing and preliminary economic assessments as early as 2026. In turn, this could strengthen Lomiko’s position in the North American battery supply chain, particularly as graphite becomes subject to strategic resource designations under evolving U.S. and Canadian critical mineral frameworks.