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Vision Lithium Reports High-Grade Cesium Discovery up to 1.94% Cs2O at Sirmac Property

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Val-d'Or, Québec--(Newsfile Corp. - December 2, 2024) - Vision Lithium Inc. (TSXV: VLI) (OTCQB: ABEPF) (FSE: 1AJ2) (the "Company" or "Vision Lithium") is very pleased to report the discovery of high-grade cesium mineralization from pegmatite outcrops on its Sirmac property located 40 km west of Sayona's Moblan lithium deposit and 160 km by road from Chibougamau, Québec.

Yves Rougerie, President & CEO comments: "The very high-grade cesium results suggest these dikes are highly fractionated LCT (lithium-cesium-tantalum) pegmatites with the potential of hosting economic cesium mineralization. Although not observed, the mineral pollucite, the principal mineral of cesium, is likely present. These cesium assay results are amongst the highest ever reported in the province of Québec. The provincial database of surface rock samples contains over 80,000 cesium assay results of which only one result is above 1% and less than ten are above 800ppm (ref SIGÉOM)."

Vision's Sirmac property is host to the #5 Dike pegmatite lithium deposit as well as the Clapier lithium occurrence 6 km to the ENE. A new area of mineralized pegmatites was discovered late in 2024 in the southern portion of the property, approximately 10 km SE of the #5 Dike. A single visit to the area led to the discovery of two pegmatite dikes in contact with basalts. The dikes outcrop minimally, and their size and extent are not currently known. However, spodumene was observed in both dikes and representative samples of pegmatite and the host rock basalt were taken from each site with the following results:

Table 1. Grab Sample Assay Results

Grab
Sample

Cesium
ppm

Cs2O*
%

Lithium
ppm

Li2O*
%

Tantalum
ppm

Rubidium
ppm

Pegmatite 1

13,150

1.39

3,230

0.695

201

6,010

Pegmatite 1

18,300

1.94

860

0.185

264

4,610

Basalt 1

179

0.02

410

0.088

1

99

Pegmatite 2

8,410

0.89

2,880

0.620

257

5,370

Basalt 2

1,320

0.14

1,290

0.278

1

961

Note: Cs2O% = (Cs ppm/10 000) *1.06; Li2O% = (Li ppm/10 000) *2.153

 

The dikes also exhibit highly anomalous values for lithium, tantalum and rubidium. These results are similar in many respects to values reported from the producing Tanco mine in Manitoba and the Case Lake exploration project in eastern Ontario, the two most significant cesium occurrences in Canada.

The highly anomalous values in the basalt samples for cesium and lithium indicate a strong alteration halo surrounding the pegmatite dikes. This suggests the dikes are potentially larger/wider at depth and/or along strike.

The exploration program was coordinated with Innovexplo of Val d'Or, Québec who contributed new interpretations of existing geological models for the property occurrences earlier in the year followed by field work that included outcrop visits and systematic structural measurements and a reinterpretation of pegmatite textures from drill core relogging (mainly from Dike #5). Proposals for new exploration concepts and targets resulted from this work. The new area discovery is also the result of this coordinated effort. Decades-old historical drilling for base metals in the southern area intersected pegmatite dikes which were not sampled at the time. Other dikes are likely present under overburden cover in the vicinity of the new dikes. A whole new corridor/swarm of LCT pegmatite dikes is possible in this area, fertile for both cesium and/or lithium-tantalum economic deposits. Future exploration will focus on this area for this obvious potential.