The property geology is dominated by rocks of the Early Jurassic Texas Creek Intrusive Suite which are interpreted as coeval intrusive equivalents to extrusive Hazelton Group volcanic rocks found to host significant mineral occurrences to the east in British Columbia. This synvolcanic intrusive is possibly related to the feeder intrusive to the proximal Premier and Big Missouri epithermal deposits. Multiple phases of this intrusive suite were identified on the Property during 2021 reconnaissance mapping, including the ‘Premier Porphyry’, a distinct megacrystic Orthoclase-rich intermediate porphyritic unit strongly associated with gold mineralization in the area.
Polymetallic quartz-sphalerite-galena-tetrahedrite-pyrrhotite-pyrite veins located on the property have historically been analyzed using lead isotope studies and interpreted as being Jurassic in age, suggesting a relationship between mineralization and the host Texas Creek Intrusive stock. Localized shearing and hydrothermal alteration have been documented at the property which are likely related to gold-silver and base metal mineralization. Local exposures are present with strongly altered intrusive hosting high-grade gold-silver mineralization, often with significant copper, molybdenum, barium, lead, and zinc. The geological target and exploration concept of the property is similar to the large intrusive-related and porphyry copper and gold deposits in the region such as Snowfield, Treaty, Kerr, and Mitchell, located adjacent to the high-grade Brucejack Gold Mine to the north.
Figure 1: Satellite imagery (FatMap 2021) overlain with upper and lower vein projections, 2021 exploration area, and notable historic assays
Two prominent vein systems (see Figure 1) have been historically described and were sampled by United States Government geologists in the 1990s who collected a total of 19 samples, six of which assayed over 1.0 g/t gold. The upper ‘100 foot wide’ gold-rich quartz vein returned assays including 27.74 g/t Au and 13.54 g/t Ag. This vein was observed in outcrop by Blackwolf geologists during 2021 helicopter reconnaissance as well as in float at the base of the cliffs (See Figure 2). A lower silver-rich vein was also described historically, with individual assay results including 18.48 g/t Au, 1206 g/t Ag, and 2.48% Cu; 9.24 g/t Au, 1173 g/t Ag, and 1.98% Cu. Abundant vein material from this structure was observed and sampled by Blackwolf geologists in scree at the base of the cliffs (See Figure 3, 4).
Figure 3: Massive quartz-sulphide vein material with copper mineralization observed in boulder in scree
Figure 4: Massive quartz-sulphide vein material with copper mineralization in boulder in scree
Mapping of the regional geology in the vicinity of Cantoo Mountain has been relatively sparse, with current property-scale interpretation being derived from mapping released by James Smith in 1977 and projection of British Columbia Geological Survey regional mapping due to the property’s proximity to the Canadian border. Two days were spent by Blackwolf field crews on the property during the 2021 reconnaissance field program, during which 41 soil samples along with 28 rock samples were collected, with all assay results pending (see Figure 5).
Figure 5: Cantoo Property Map showing 2021 sample locations, upper and lower vein projections, and notable historic assay results