The Opus Property is an early-stage lithium exploration project located in the Eeyou Istchee James Bay region of Northern Québec. Covering 4,861 hectares across 91 mineral claims, the property lies approximately 6.5 km southeast of the Billy Diamond Highway and 62 km south of Camp 509. It is situated in a geologically favorable area that is seeing increasing lithium exploration activity.
The property is accessible via helicopter from Camp 509, which supported the 2024 field operations. Its location near the Billy Diamond Highway makes future access and logistical support straightforward.
The Opus Property is part of the La Grande Sub-province, and is underlain by tonalite, granodiorite, quartz diorite, and metasedimentary units. These lithologies are known hosts of LCT (lithium–cesium–tantalum) pegmatites in the broader James Bay region.
Prior to 2024, the property had seen limited exploration. The claims were selected based on regional lake sediment anomalies in lithium, cesium, and rubidium, which are typical geochemical indicators of LCT pegmatite potential.
The 2024 exploration program consisted of:
Multiple pegmatite dykes were mapped, typically consisting of quartz, feldspar, muscovite, and biotite. Coarse-grained textures and the presence of garnet suggest evolved pegmatite systems in several areas.
A total of 56 rock samples were collected. Key highlights include:
Numerous samples returned K/Rb ratios below 150 and Nb/Ta ratios below 8, indicative of fractionated pegmatites with potential for hosting lithium-bearing minerals.
Although no spodumene was identified during the 2024 field program, the geological setting, pegmatite occurrences, and geochemical signatures suggest the Opus Property is a prospective target for LCT-type lithium mineralization. Several areas remain underexplored and are recommended for follow-up work.
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