Solis Minerals Mobilises for Drill-Ready Lithium Targets in Brazil

Solis Minerals Advances Lithium Exploration in Brazil

Solis Minerals (ASX:SLM) has mobilised its exploration team to the Mandacaru and Campo Grande lithium prospects in Minas Gerais, Brazil, signalling a significant step toward drilling in one of the world’s most promising hard-rock lithium belts. Both targets, acquired from Rio Tinto, come with robust geochemical and geological datasets that position them as high-priority, drill-ready sites within the Araçuaí–Salinas Lithium Valley.

Mandacaru stands out with soil lithium anomalies peaking at 362 ppm and auger drilling confirming consistent mineralisation below 2 metres depth, supported by elevated rubidium, tin, and tantalum, key pathfinders for spodumene-bearing LCT pegmatites. Campo Grande similarly exhibits strong lithium anomalies up to 294 ppm with broad mineralised intervals, and structural trends consistent with productive pegmatite systems nearby. Both prospects show geochemical signatures comparable to those that preceded the Colina lithium discovery, now held by PLS (ASX:PLS), enhancing their exploration appeal.

Drilling Plans and Strategic Advantages

Subject to land access agreements and rig availability, Solis Minerals aims to commence initial diamond drilling in June 2026. The program will focus on testing the core of the strongest geochemical anomalies, confirming pegmatite presence and thickness, and providing vectoring data for follow-up drilling. The proximity of Mandacaru and Campo Grande, just 18 kilometres apart, allows for parallel surface work and efficient field operations.

The company benefits from the involvement of a former senior Rio Tinto geologist who supported the discovery of these targets, alongside executives with prior success in the district, including Chris Gale, Tony Greenaway, and CEO Mitch Thomas. This local expertise and familiarity with the region’s geology and permitting landscape are expected to expedite exploration progress.

Expanding Regional Exploration Pipeline

Beyond the immediate targets, Solis Minerals is launching a regional exploration program across its 93,000-hectare Brazil Lithium Project tenure. This initiative will employ reconnaissance mapping, targeted soil and rock-chip sampling, and structural interpretation to identify additional drill-ready prospects. The approach mirrors the successful targeting strategy used at Colina, prioritising coherent lithium anomalies supported by LCT pathfinder elements rather than isolated high values.

This broader program aims to build a pipeline of lithium targets to complement drilling at Mandacaru and Campo Grande, potentially accelerating discovery timelines in a district where lithium prices have surged above US$2,500 per tonne. The extensive prior work by Rio Tinto, including 1,814 soil samples and 18 auger holes, provides a solid foundation for this next phase of exploration.

Capital and Operational Context

Solis Minerals’ recent acquisition and exploration ramp-up follow a capital raise and strategic expansion in South America, including copper projects in Peru. The company’s broader portfolio and funding position support an active 2026 drilling calendar. The current phase in Brazil is a critical test of the project’s potential to deliver a near-term lithium discovery in a globally significant region.

Early assay results from drilling, expected from July 2026 onwards, will be key indicators of the project’s promise. Meanwhile, land access and rig logistics remain variables that could influence the schedule. The company’s methodical approach to exploration and its leverage of historical data set a clear pathway for advancing these assets.

Investors tracking Solis Minerals will find the unfolding activity in Brazil a compelling development, especially given the strategic adjacency to PLS’s Colina project and the company’s strong technical pedigree in the region. The coming months will reveal whether these well-defined, drill-ready targets can translate into a significant lithium resource.

These developments build on the company’s earlier announcement of the acquisition and drilling plans, reflecting a consistent strategy to grow its South American battery materials portfolio amid rising global demand for lithium and copper. The interplay between the Brazil and Peru projects highlights Solis Minerals’ diversified approach to resource exploration in the region, as outlined in its recent June drilling planned update and broader capital strategy detailed in the $5.9M raise and Cucho acquisition earlier this year.