Golden Bear Group
The Garrison Project is located in Garrison Township, Larder Lake Mining Division, approximately 40 km north of Kirkland Lake and 100 km east of Timmins, Ontario (Figures 1). The Garrison Project belongs to the Golden Bear Properties which are made up of 16 non-contiguous claim groups (Figure 2).
The Golden Bear Group of properties, situated in the Abitibi Greenstone Belt (AGB), are underlain by Neoarchean supracrustal rocks of the Abitibi Subprovince of the Canadian Shield. Gold deposits in the area are structurally controlled and are widely distributed within the AGB, but all the large deposits occur within 2 kilometres of the Porcupine-Destor Fault Zone, the Pipestone Fault Zone or the Cadillac-Larder Lake Shear Zone.
The Garrison Project is underlain by rocks of the Kidd-Munro and Timiskaming Assemblages and about 4 km of the regionally significant Destor-Porcupine Fault Zone and a major splay, the Munro Fault Zone (Figure 3).
The Kidd-Munro Assemblage is comprised of massive to pillowed, mafic (high magnesium and iron tholeiites) and ultramafic (komatiite) metavolcanic rocks. The metavolcanic flows strike in a general east-west direction and dip steeply to the south. The Timiskaming Assemblage is composed of clastic metasedimentary rocks, consisting of conglomerate, wacke-sandstone, siltstone, argillite and schist, and is closely associated with the Porcupine Destor deformation zone from the Quebec border to Hislop Township, a distance of approximately 65 km (Berger, 2002). Banded magnetite-hematite iron formation is complexly interbedded and structurally interleaved with clastic metasedimentary rocks. The Timiskaming Assemblage is younger than the Kidd-Munro Assemblage, and in the absence of faults, the contact between the assemblages is an angular unconformity. On the property, the Timiskaming Assemblage is fault-bounded on the north side by the Munro fault and on the south side by the Porcupine-Destor fault.
The most significant gold mineralization defined to date is currently known in 3 main zones; Garrcon Deposit, Jonpol Deposit, and 903 Zone.
The Garrcon Deposit, comprises a broad zone of low-grade gold mineralization that includes local higher-grade areas. It occurs within the Timiskaming Assemblage adjacent and to the north of the Porcupine-Destor fault and to the east of the north-south trending Garrison fault. It is a zone of brecciated, silicified metasediments with stockwork type quartz-carbonate veins and veinlets and minor disseminated sulphides cut by narrow variably altered lamprophyre and syenite dikes. Gold occurs primarily as native gold within the stockwork veins with minor dissemination into the vein walls
The Jonpol Deposit, was the primary exploration target on the property in the 1980s and 1990s and is defined by a zone of gold mineralization hosted in structurally controlled alteration zones within mafic and ultramafic rocks along with the north contact of the Munro Fault, which crosses the north-central part of the property. Jonpol gold mineralization is generally associated with pervasive carbonate alteration with late-stage silicification, sulphidization (pyrite and arsenopyrite) and sericitization, giving the altered rock a pale beige to pale purple-grey hue.
Extensive drilling by Osisko Mining Inc. in 2016 to 2018 has helped classify the mineralization style at the 903 Zone as a traditional “syenite associated deposit”. The syenites are typically hosted by deformed ultramafic rocks, although they less commonly occur within the mafic volcanics. Although no geochronology has been conducted, the syenites are likely associated with the Timiskaming magmatic event, recognized along the Abitibi, with alkaline characteristics, which occurred approximately between 2,680 and 2,672 Ma (Corfu et al, 2001). Host rocks consist of albite-sericite-chlorite altered ultramafic to mafic volcanics. Alteration primarily consists of albite-hematite-specularite.