The Mantle Property is located in the emerging lithium district of Eeyou Istchee James Bay, Northern Québec. The project comprises 3,615 hectares across 68 mineral claims, situated approximately 5 km west of the Billy Diamond Highway and 45 km south of Camp 509. The area is considered highly prospective for lithium–cesium–tantalum (LCT) pegmatites based on regional geology and nearby discoveries.
The property is easily accessible by helicopter, with Camp 509 serving as the logistical base for the 2024 fieldwork. Its close proximity to the Billy Diamond Highway provides a potential transportation corridor for future development and exploration activities.
Mantle is underlain by a mix of tonalite, granodiorite, and metasedimentary rocks, all part of the La Grande Sub-province of the Archean Superior Craton. These geological units are known to host LCT pegmatites in the region. The property also includes several structurally favorable zones that may serve as conduits for pegmatite intrusion.
Prior to 2024, limited exploration had been conducted on the Mantle Property. The claims were originally staked based on strong regional lake sediment anomalies for lithium, cesium, and rubidium, as well as the property’s proximity to other high-grade lithium occurrences in the region.
The 2024 exploration program included:
Multiple pegmatite dykes were discovered, many featuring textures and minerals typical of LCT systems, such as quartz, feldspar, biotite, and muscovite. One coarse-grained outcrop showed feldspar crystals up to 10 cm in size.
A total of 49 samples were collected. Notable values include:
Several samples displayed K/Rb ratios <150 and Nb/Ta ratios <8, geochemical markers that indicate potential for evolved granitic systems associated with lithium pegmatites.
Although no spodumene was identified during the 2024 program, the combination of mapped pegmatite dykes and favorable geochemical indicators supports the potential for LCT-style mineralization. Areas in the north and east of the property remain underexplored and represent strong candidates for further work.
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