Fieldwork

In 2009, a diamond drilling program was carried out. Seven diamond drill holes totalling 864 metres tested a portion of the 400 metre swarm of lithium pegmatites that extends to a minimum of 650 metres in strike length. All of the seven drill holes intersected the main zone of pegmatitic lithium dykes, varying from 30 to 50 metres in thickness; the zone is open both laterally and at depth. The pegmatites, found in mafic volcanic rocks, generally vary between one to three metres in thickness but can also reach 9, 11 and 13.5 metres in thickness. The pegmatites are mineralized in spodumene whereas many of the volcanic rocks contained holmquistite, another lithium mineral.

In 2010, Sirios released assays results for other metals, rubidium, beryllium, tantalum and cesium. Grades of up to 4,980 ppm (g/t) over 1.8 m of rubidium (Rb), 484 ppm over 3 m in beryllium (Be), 204 ppm over 4 m in tantalum and 480 ppm over 2 m of cesium were obtained in the lithium pegmatites (ppm : parts-per-million, 10,000 ppm = 1%). Although low, when taken separately, these grades of these different elements show a possibility to obtain eventually some by-products most probably tantalum, niobium and possibly cesium in case of a spodumene mining production for transformation into lithium carbonate. However a detailed mineralogy study (using microscope and chemical analysis) is needed on order to identify the minerals containing these different metals and consequently confirm or not the potential recovery of these by-products.