"The geological model is based on two geological domains. The first is Archean basement granite on gneisses — a highly metamorphic context. The second is Proterozoic metasediments. Most mineralized zones are related to regional-scale pegmatitic dyke swarms. There are deep-seated crustal-scale faults that are Proterozoic, and control several mineralized zones, so the faults are exploration targets, too.
There is a 70 km-long unconformity between Archean rocks and Proterozoic metasediment. This contact has been tectonized by a subsequent orogenic event. Proterozoic sediments were deposited above Archean granitic and gneissic rock formations (basement).
“This is a fantastic environment to look for uranium,” Lulin says. Most of the mineralized zones are located along the tectonized unconformity, in particular the Jonas zone (700 metres long), Puqila zone (6 km long), Cirrus zone (2.4 km long) and Amittujaq zone (3.5 km long).
There is a strong uranium background in the lake-bottom sediments (from 50 to 1,800 parts per million uranium oxide) in the region, especially in the sectors corresponding to the Archean basement and along the Archean-Proterozoic geological contact.
The exploration model is Archean-Proterozoic contact. Mineralization will be explored along late-stage crustal scale faults, and marbles will also be explored. It is possible that most mineralization could be found in pegmatites in host sediments. Pegmatitic dykes are continuous at a regional scale. They can be 5 to 80 metres wide, and individual dykes can be 2 to 3 km long. Lulin will be looking for mineralization starting at surface that could be mined by open pit. "