Above: Map of southeast Manitoba showing the Donner and Falcon West lithium/cesium projects.
DONNER LITHIUM/CESIUM PROJECT
The Donner Lithium Property is a 75% Grid / 25% Li Equities Investments LP, formerly Lithium Royalty Corp. (LRC) joint venture. Terms of the joint venture transaction can be found in the press release dated January 14, 2022 (HERE). Tanco and LRC each have a 2% royalty interest on the Donner project. The Donner project contains a NI 43-101 compliant lithium resource of 6.81 million tonnes (“MMt”) (Inferred) grading 1.39% Li2O (see press release dated July 18, 2023 (HERE)).
In additional to lithium, the project contains the extremely rare cesium mineral, pollucite, at the High-Grade (“HG”) Dyke. The dyke has seen limited exploration with drilling completed in the 1980’s for tantalum. Pollucite is only formed in the most fractionated LCT-type pegmatite bodies and is only known from a very small number of localities, globally. A select composite surface grab sample from the High-Grade Dyke taken in 2024 returned 17.5% Cs2O associated with coarse-grained pollucite. By nature, pollucite mineralization is discontinuous, and the Company plans close spaced drilling over a ~200 m strike length to test for any continuity of pollucite to a vertical extent of 30-50 m. The mineral pollucite contains up to 30% Cs2O. The subject of multiple academic studies by world-renowned pegmatite researchers, the High-Grade Dyke represents a potential small-footprint and high-value future mining project for Grid Metals.
The High-Grade Dyke is situated within the area of Grid’s Advanced Exploration Permit (“AEP”) that allows Grid to complete a 10,000-tonne bulk sample, subject to the posting of a reclamation bond.
Above: Map of the Donner project with location of HG Dyke and proposed drill holes.
Cesium Agreement with Tantalum Mining Corporation of Canada Limited (Tanco)
Grid announced a cesium supply agreement (the “Agreement”) with Tanco at the Donner project on February 18, 2025 (see press release HERE). The Agreement provides funding for drilling and project development up to CAD$1.2 million with the objective of Grid toll milling cesium ore at the operating Tanco Cesium plant at Bernic Lake. Initial drilling will focus on the cesium-enriched High-Grade Dyke (“HG”) at Grid’s Donner lithium/cesium project, located 35km from the Tanco Mine Site.
Terms of the Agreement
- Initial CAD$300,000 for first phase drilling at HG Dyke
- Follow up CAD$900,000 for project development/permitting
- In exchange, Tanco will have the right to purchase 10,000 tonnes of cesium-bearing material grading at least 5% Cs2O for a price of US$300/t per 1% Cs2O with deductions applied for transport.
- The advance payments received will be deducted from the proceeds of cesium sales to Tanco.
FALCON WEST LITHIUM/CESIUM PROJECT
Falcon West covers the next prospective greenstone belt south of the world-class Tanco mine which operates North America’s only cesium chemical plant. The project is 100%-owned by Grid.
The project boosts high-grade cesium at the Lucy pegmatite (within the ArtDon-Lucy target). Highlight intercepts include 3.2 m at 1.85% Li2O and 4.56% Cs2O (ADL24-09) and 3.28 m at 10.3% Cs2O (LU-12-02). In addition, there is a historical non-compliant resource for the Lucy Pegmatite of 226,000 tonnes grading 1.75% Li2O* with the cesium grade undefined (*Grid Metals is not able to verify the accuracy of the estimate and does not consider it a current resource).
Available exploration data indicate that the Lucy pegmatite is a relatively flat-lying and outcropping body that is at least 1 km long and 200 metres wide. Cesium mineralization is concentrated at the upper contact of the Lucy pegmatite that is locally exposed at surface.
Above: Falcon West Lithium Property regional map. The property covers the favourable geological contact between the Winnipeg and Wabigoon subprovinces. Several lithium bearing pegmatites (ArtDon and Lucy) have previous drilling and high-grade lithium/cesium.
Above: Lucy pegmatite plan view with historical drill results and proposed drill holes.
