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Near-mine and Regional Exploration


The 2021 near-mine exploration program will focus on the new discovery at Hanging Glacier, which is easily accessible from the Brucejack Mine using existing exploration trails.

A 10,000-meter surface drill program is planned to delineate the high-grade gold corridors and test for higher-grade, epithermal-style veins higher up in the stratigraphy.   A high-resolution drone magnetic survey and an induced polarity (IP) survey are also being planned to further delineate the monzonitic porphyry intrusion and aid in targeting along the mineralized contacts.

Additional near-mine exploration efforts will focus on the four-kilometer trend of highly-altered rocks which outcrop from Hanging Glacier Zone northwest of the Brucejack Mine to Bridge Zone located southeast of the mine. Generative exploration work, including prospecting, soil sampling, and geophysical surveys, will be conducted to test the potential of these zones and develop new near-mine exploration targets. An additional 8,000 meters of surface drilling is planned to test these zones and expand upon the mineralization potential surrounding the Brucejack Mine.

hanging glacier zone

The Hanging Glacier Zone comprises two areas – North Hanging Glacier and South Hanging Glacier – defined by anomalous gold in soil samples that extend over 1.5 kilometers by 1.0 kilometer. In 2020, drilling at Hanging Glacier tested two high-grade gold in soil anomalies assaying up to 3.21 grams per tonne gold and followed up on mineralization intersected during the 2015 exploration program (see news release dated October 8, 2015).

At North Hanging Glacier, drilling intersected gold mineralization hosted in pyrite localized along a monzonitic porphyry intrusion. The 2020 discovery hole, BR-107, assayed 1.3 grams per tonne gold over 101.0 meters. A 100-meter northwest step out hole, BR-132, assayed 2.1 grams per tonne gold over 102.0 meters, including 9.55 grams per tonne gold over 13.0 meters, showing lateral continuity of the gold mineralization along the porphyry contact.

At South Hanging Glacier, drilling intersected broad intervals of low-grade gold hosted in disseminated pyrite. An epithermal-style, quartz-carbonate vein intersected in Hole BR-112 hosted native gold and pyrargyrite, assaying 8.97 grams per tonne gold and 5,150 grams per tonne silver over 1.0 meter. Drilling at South Hanging Glacier is located further from the porphyry contact, showing the potential size of the epithermal system.


The Bowser Regional Project area, approximately 20 kilometers south-east of the Valley of the Kings deposit, comprises approximately 1200 square kilometers. The 2015 grass-roots exploration program included airborne EM, magnetic and radiometric surveys over two thirds of the claims area, as well as prospecting. A 20,000-meter surface drill program targeted porphyry/epithermal-style mineralization to the east of the Brucejack Mine. The 2015 brownfields exploration program was successful in expanding the size of the hydrothermal system that includes the Valley of the Kings and confirming the potential for additional mineralized zones to the east. With the discovery of the Flow Dome Zone the program was successful in extending the strike length of the Valley of the Kings gold mineralization 1,000 meters to the east of the current Valley of the Kings Measured and Indicated Mineral Resource.

In 2016 the regional exploration program expanded to cover the remaining areas of the Bowser Property. To date, the comprehensive regional exploration program has included the collection of over 20,000 samples, regional mapping, prospecting, airborne geophysics, ground geophysics, hyperspectral mapping, and data compilation. The program has resulted in the identification of high-priority targets across the Bowser Property, including a volcanogenic massive sulphide (VMS) system in the A6 Zone, a structurally controlled intrusion-related gold system at the Koopa Zone, a porphyry copper-gold system in Haimila, and epithermal systems in the Tuck and American Creek Zones.


The A6 Zone is located approximately 14 kilometers northeast of the Brucejack Mine. A prospecting and mapping program in 2018 outlined an area with stratigraphy consistent with a paleo-rift environment, favorable to the formation of Eskay Creek-style VMS systems. Drilling in 2019 included 17 drill holes totaling 8,340 meters and identified a buried rhyolite dome capped by a mudstone unit locally anomalous in arsenic and mercury. The rhyolite dome is up to 200 meters thick, at least 500 meters wide and 2 kilometers long, and remains open to the north and south. The rhyolite is intensely sericite altered, hosts pyrite stringer zones, and locally hosts anomalous copper and silver values. In two drill holes peripheral to the rhyolite, narrow intersections of high-grade silver and copper mineralization were found.

Drilling in 2020 included 19 drill holes totaling 11,883 meters, and the results continued to define a large hydrothermal system within an altered rhyolite dome. In West A6, Hole BR-092 intersected a 0.10-meter interval of massive pyrite mineralization. The massive pyrite was not anomalous for precious or base metals, indicating that the current drilling is still distal from a productive hydrothermal vent, requiring additional geophysics.


The Koopa Zone is located approximately 30 kilometers east-southeast of the Brucejack Mine, hosts a structurally controlled quartz, pyrite and arsenopyrite vein system that cross-cuts sericite altered Iskut River Formation. The trace element geochemistry is indicative of an intrusion-related gold system. Drilling in 2019 included 13 drill holes totaling 5,771 meters, testing along strike to the northwest from the 2018 drilling. The results defined a 300 meter long deformation zone that hosts low-grade gold. The mineralized zone is northwest-southeast trending and is open to the northwest and at depth.

Drilling in 2020 tested deeper parts of the epithermal system. These holes continued to intersect strongly altered Iskut River Formation, and gold and silver mineralization is hosted in two generations of quartz veins. The 2020 drilling results show that veining density and the grade of mineralization continue consistently to depth. Hole BR-108 intersected 0.94 grams per tonne gold over 1.5 meters and 1675 grams per tonne silver, 2.72 percent lead and 7.23 percent zinc over 1.1 meters.


The Haimila Zone is located approximately 20 kilometers southeast of the Brucejack Mine where surface sampling over the previous two field seasons had identified numerous discontinuous quartz-sulphide veins with highly anomalous values of gold and copper. On the west side of the Haimila Glacier, these veins are associated with zones of strong propylitic and phyllic alteration, which are believed to be porphyry-related. In 2019, two drill holes totaling 531 meters tested the alteration zone. Both holes intersected up to 100 meters of phyllic alteration with anomalous values of gold and copper. Drilling in 2020 included 2 holes totaling 788 meters, testing a zone of porphyry-style propylitic alteration. One of these holes, BR-146, intersected narrow quartz and chalcopyrite veins.


Several gold and silver epithermal targets have been identified in the American Creek Zone, located approximately 25 kilometers southeast of the Brucejack Mine. The American Creek valley is dominated by kilometer-scale north-south structures and localized east-west stockworks, which host elevated gold values of up to 62.5 grams of gold per tonne in rocks of the Lower Hazelton Group, Unuk River Formation, the same formation that hosts the Brucejack Mine. In 2018, drilling intersected broad zones of low-grade mineralization at the north end of the American Creek Zone (Lillianne showing) and an upper expression of a polymetallic epithermal vein system near the center of the American Creek Zone (Virginia K showing). Follow-up drilling in 2019 intersected similar mineralization at Lillianne, but failed to intersect any significant mineralization at Virginia K.


The Tuck Zone is located 7 kilometers south of the Brucejack Mine. A bed of intensely quartz-sericite-pyrite altered andesitic volcanics of the Unuk River Formation hosts low grade gold in pyrite. The showing is part of a linear trend that includes Snowfield, Brucejack, and Bridge Zone along the eastern margin of the Brucejack Fault. Five drill holes completed in 2019 tested a 400-meter-long section of the zone, all of which intersected a flat lying bed of intensely altered volcanics that contained low grade gold associated with pyrite.


Source: 2020 regional grassroots exploration program results news release Dec16/20