Turgeon Lake

The property is located in the North Volcanic Zone (NVZ) of the Abitibi Subprovince. The Abitibi Subprovince is an Archean greenstone belt which hosts some of the richest mineral deposits of the Superior Province.

Rocks of the Turgeon lake area are essentially composed of mafic and felsic volcanics of the Clermont-Disson Formation and the Normétal Volcanic Complex. The felsic Val-St-Gilles pluton  is the largest intermediate intrusive mass of the area. According to geochronological data, it is part of the large synvolcanic plutons of the NVZ that were emplaced around 2,722 Ma to 2,714 Ma (Chown et al., 1992). All Archean units were verticalized during the Kenorean Orogenesis, and structured in bands cut by regional E-W shear zones. Late intrusions and NW-SE dextral faults and NE-SW senestrial faults terminate the structural organization of the region (Guemache, 2020 – RG2018-01).

A thick sequence of clay covers the area so that very few outcrops are available on the Turgeon Lake property; geology is essentially deduced from historical drilling data (DDH). The Turgeon Lake property is occupied by the Val-St-Gilles Pluton (Figure 3) which consists of more or less foliated biotite-trondhjemite and biotite-tonalite (Beausoleil, 2000a-b, 2005; Beausoleil and Doucet, 1998, 2002a-c; Chabot et al., 2003; Deschênes, 2012; Deschênes et al., 2015), as well as tonalite with rhyolite enclaves and granophyric tonalite (Guemache, 2020).

Two (2) Proterozoic diabase dykes cross the property in a NE-orientation (Abitibi Swarm).

The Turgeon Lake property is located in the Neoarchean Burntbush-Normétal volcanic belt which includes a wide range of compositions from basalt through andesite to rhyolite and their subvolcanic equivalents. These rocks are favourable for volcanic massive sulphides (VMS – eg: Normétal mine and Normétmar satellite) and for gold development (eg: Amex Exploration – Perron project).

Three (3) types of mineralization are observed in this area : 1) Exhalative stratiform with massive and disseminated sulfides (pyrite, pyrrhotite, chalcopyrite, sphalerite, silver and gold), 2) Disseminated pyrite, pyrrhotite, chalcopyrite and bornite in Normetal volcanics, and 3) Cu-Mo porphyry with chalcopyrite, pyrite and molybdenum in veins and fractures affecting the Val-St-Gilles pluton. Alterations associated with mineralization include chlorite, silica and sericite.

The felsic intrusive rocks of the Val-Saint-Gilles pluton is host for two (2) occurrences of vein type gold mineralization, namely Rollmac (Val St-Gilles) and Lac Turgeon-Rive Ouest, which are emplaced along diabase dikes. The Lac Turgeon-Rive Ouest gold showing is hosted in the Lac Turgeon Est property border; it is described by historical work as multiples disseminated gold bearing quartz veins, sometimes associated with traces of pyrite and pyrrhotite system hosted in the Val-St-Gilles granodiorite. Grab samples from 1992-1993 (GM52490) returned several high-grade contents like 168.3 g/t Au, 30.2 g/t Au and 23.7 g/t Au. Up to 18,7 g/t Au over 3.09 m, including 68.9 g/t Au over 0.4 m, returned from historical DDH (GM54287) with strong nugget effect reported. Gold can be disseminated in the host rock, associated with pyritic fractures, or naturally occurring in quartz veins. The alterations noted in association with the Lac Turgeon showing show many characteristics of those associated with porphyry-type gold deposits (GM54287).

The Normétal fault, associated with several gold and base metals showings and deposits including the Normétal former mine (historical production 1937-1975 : 10,084,300 t @ 5.41% Zn, 2.24% Cu, 0.526 g/t Au and 44.45 g/t Ag) is located about 6.5 km south of the Lac Turgeon Est property.