Lac Mitaine
Location, Access, Description
The Lac Mitaine property is located in northeastern Quebec, about 95 km east of Reservoir Manicouagan and 170 km north of Sept-Îles (Qc). The property consists of 8 mining claims covering 427.2 Ha. Globex is 100% owner of the property which is not subject to any third-party interests.
Access is only by helicopter or float plane since no road nor any infrastructure actually exists in the area. Numerous commodities can be found in Sept-Îles regarding contractors, skilled labor, equipment rental, as well as sleep and food accommodation of remote workers.
Geology and Mineralization
The property is located in the Allochtone unit of the Grenville Province, made up of all the Grenville rocks lying south of the Parautochthonous (Rivers et al., 2012). The Allochtone is composed of metamorphosed detrital, pelitic and carbonate rocks of Paleoproterozoic to Mesoproterozoic age (1.6 to 0.985 Ga ; Rivers et al., 1989 ; Friedman and Martignole, 1995 ; Martignole and Calvert, 1996).
The area of Ste-Marguerite River was mapped by Gobeil in 1993 (MB93-45); rocks of the area are composed of paragneiss and other metasediments like quartzite, intermediate to ultramafic gneiss of the Manicouagan metamorphic Complex, and granitic to tonalitic orthogneiss of the Molson Lake Complex. Minor pegmatites are also observed.
The Lac Mitaine property is centered on circular-shaped gabbro and peridotite of the Toulnustouc Intrusive Suite, surrounded by gabbro, norite and porphyritic monzonite of the Manicouagan Complex. Metamorphism over the property reaches the granulite facies. The Ste-Marguerite regional fault strikes NNW about 1 km east of the property.
Metallogeny
The economic interest in the region stems from its potential for base metals such as copper, nickel, and cobalt, and for platinum group elements associated with mafic or ultramafic rocks (Gobeil, 1995). This potential was highlighted in the early 1960s during geological mapping by Kish and exploration work carried out by Hudson Bay Mining Ltd. in the late 1970s.
The Lac Mitaine property hosts the Lac Mitaine (Rivière Sainte-Marguerite) Ni-Cu-EGP (±Au ±Co) showing which was discovered by prospection in 1992. Mineralization consists of up to 10% sulphides (pyrrhotine, chalcopyrite, pentlandite and violarite) disseminated in an olivine-rich gabbro-norite horizon of the Manicouagan Complex. Some vein filling is also observed. Assays up to 0.22% Cu, 0.20% Ni, 1.45 g/t EGP, 0.43 g/t Au and 103 g/t Co were observed on historical grab samples (MB96-41). Weathering forms large rusty zones which are easily recognizable on surface outcrops.
History
Limited exploration was carried out throughout past decades in this area. Some geological mapping, airborne spectrometry and lake sediments geochemistry surveys were conducted during the 1970s. In 2007, Aeroquest Intl. conducted airborne magnetic (Mag) and electromagnetic (EM) survey (GM63143) which highlighted several EM anomalies on the Lac Mitaine property. Field verifications of the main EM anomalies in 2009 (GM64377) did not succeed in explaining their origin.
In 2022, Murchison Minerals Ltd. undertook a 4,337 line-km high-resolution helicopter-borne geophysical survey which covered part of Globex’s property and a 708 square-km LiDAR survey in the Lac Mitaine area (GM73578).
Resources and Potential
More exploration is required on the Lac Mitaine property due to favorable geologic context for Ni-Cu-EGP mineralization. No rock stripping nor DDH has ever been undertaken on the property. The mineralization style in presence is easily identifiable with geophysics. New ground surveys combining Mag, EM and induced polarization (IP) methods would definitely help defining detailed exploration targets.