Copper-gold-silver-molybdenum porphyry mineralization at the Camp Creek Target has been the focus of drilling by Brixton Metals since 2011. The target area is approximately 1.5km by 2km, and covers several different mineralized zones, including Oban, Talisker and Glenfiddich.
The porphyry is blind and it wasn’t until 2019 that drilling was deep enough to connect with the veining system, starting at approximately 300m depth. Through the 2020 and 2022 exploration season, drill testing has pushed holes beyond 1,000m depths and Camp Creek is now encountering Cu-Au-Ag-Mo porphyry mineralization over 100’s of meters, including 967.71m of 0.25% Cu, 0.09g/t Au, 2.39 g/t Ag and 186 ppm Mo (0.38% CuEq*) in THN22-201, and 821.25m of 0.24% Cu, 0.10 g/t Au, 2.44 g/t Ag and 174 ppm Mo (0.38% CuEq*) in THN21-184. Brixton continues to test the extents of this porphyry system, at depth and towards the northwest, northeast and southeast.
Geology at Trapper is predominantly volcanic and volcaniclastic rocks of the Upper Triassic Stuhini group, which are intruded by Cretaceous quartz diorites, interpreted as part of the Thorn Magmatic Suite. The quartz diorite is associated with high-grade gold mineralization at Trapper, including a broad low-grade gold zoning that extends into the Stuhini volcanic rocks.
Gold mineralization is observed within structurally controlled quartz-carbonate veins and stockworks that host sulphides (pyrite, galena, sphalerite, minor chalcopyrite), and rare occurrences of visible gold. At surface, soil and rock geochemistry outline a 4 kilometer north-northwest gold trend, including a 2022 grab sample assaying 152 g/t Au, 187 g/t Ag, 6.11% Pb, 3.09% Zn and 0.21% Cu that has not yet been drill tested.
To date, 98 holes have been drilled at the Trapper target, including over 30 holes where visible gold has been observed. High-grade intercepts include 276 g/t Au over 0.46m and 160 g/t Au over 0.50m in THN21-186, part of a broader low-grade interval of 1.6 g/t Au over 187.51m. In 2022, drill hole THN22-205 intersected 249 g/t Au over 0.25m, within a 64m interval of 5.74 g/t Au. The 2021 and 2022 drill programs have outlined a consistent gold mineralized zone over 500m strike length, which remains open at depth and along strike. Drilling in 2023 will continue to test the extents of mineralization, in addition to targeting new structures and geochemical and geophysical anomalies.
Metla is a large 7 km x 6km copper-gold porphyry anomaly within the Thorn Project, 20 km southeast of Camp Creek. The target area claims were acquired in 2020.
Major rock units at Metla include sedimentary and mafic- to ultramafic-intrusive rocks of the Stikine assemblage, volcanic and volcaniclastic rocks of the Stuhini Group, Late Cretaceous to Paleocene felsic intrusive rocks, and hydrothermal breccia dykes that crosscut all of the previous units. Recent age dating indicates that the Au-Cu bearing granodiorite is Triassic in age, 220 +/- 3.1 Ma. The mineralization is distinct from other part of the Thorn Property with massive pyrite, chalcopyrite and sphalerite hosted in hydrothermal breccias and granodiorites, locally associated with bornite, chalcocite, and rare visible gold.
Glacier retreat within the last few years has exposed several new mineralized outcrops. Prospecting in 2022 identified new copper and gold-rich occurrences, one of which had assays up to 32.8% Cu and 59.8 g/t Au and warranted drill testing with drill holes THN22-232 to THN22-236. Drill holes THN22-228 to THN22-230 tested a new copper exposure with grab samples assaying 27.2% Cu, 23.6% Cu and 19.25% Cu. Drilling intersected variable amounts of potassium feldspar, epidote and hematite alteration with local disseminated pyrite and trace chalcopyrite and bornite. Later in the season a new Au-Ag-Cu showing was found at surface with one sample assaying 34.9 g/t Au, 1110 g/t Ag and 16.65% Cu, with surrounding samples assaying 33.2 g/t Au and 25.1 g/t Au. Surface sampling and mapping will continue to evaluate the Metla Target in 2023.
The Outlaw Zone is composed of sediment-hosted (siltstone-greywacke-argillite-carbonates) Au-Ag related to pyrite and pyrrhotite veins, and stratiform disseminated to semi-massive pyrite and pyrrhotite.
Mineralized horizons may be related to the Jurassic-aged felsic dykes, suggesting the mineralization is intrusion-related. The gold-in-soil anomaly is over 4 kilometers long. Drill testing has shown that this gold horizon occurs at depth through the central part of the Outlaw Target, over a 600m strike length. Hole THN14-128, drilled in the Central Outlaw area, returned 59.65m of 1.15 g/t Au. Surface rocks samples have returned up to 22.9 g/t Au from East Outlaw and 68.8 g/t Au from West Outlaw.
The West target is primarily a copper target, located 5km west-southwest of the Camp Creek Target. Geology at the West Target is comprised of Triassic volcanic rocks of the Stuhini Group, and Jurassic argillite and conglomerate of the Laberge Group. These Mesozoic volcanic and sedimentary rocks are cut by an Eocene granodiorite (54.2 +/- 0.8Ma) and alkali feldspar granite batholith of the Sloko-Hyder Plutonic suite, some of which has been locally metamorphosed and migmatites are observed. Mineralization is vein-hosted and disseminated, with porphyry-style quartz-pyrite-chalcopyrite veins in the Eocene intrusive and Stuhini volcanic rocks. A float sample collected in 2020 assayed 4.27% Cu.
The North Target covers the region 6 to 12 km north of Brixton’s Thorn Camp, northwest of the Sutlahine River. The area is underlain by Jurassic aged volcanic and sedimentary rocks of the Labegre Group, intruded by Cretaceous and Eocene quartz feldspar porphyry dykes and sills. Anomalous Au-Ag-Cu-Pb-Zn has been sampled across this large area, associated with skarn, porphyry, polymetallic veining and sedimentary-hosted mineralization settings. A 20cm chip sample collected in 2004 assayed 13.35 g/t Au and 324 g/t Ag. The North target area has not yet been drill tested.
Val is a copper exploration target that was identified and explored in the 80’s, two kilometers south of the Triassic-Jurassic Red Line, 28 km east of the Trapper Target. This prospect is underlain by Triassic granodiorite, intruded by felsic Sloko Group dykes. Only two small rock and soil sampling programs have been conducted at this location, and prior to Brixton’s acquisition in 2022 no work had been documented since 1987. Rock sampling in 1980 identified a bornite-chalcocite bearing 20cm quartz vein, assaying 35% Cu and 228 g/t Ag. Follow-up sampling by Brixton in 2022 confirmed the presence of the vein with assays up to 40.7% Cu, and a confirmed strike length of over 250 meters. Two copper-bearing, sub-parallel veins were also identified 50m and 100m northwest of the main vein with values of >50% Cu and 45.4% Cu respectively.
The Tat Au-Cu Target is 4km east of Trapper Lake, 11km east-southeast of the Trapper Target. Triassic Stuhini Group volcanic rocks are unconformably overlain by Jurassic Laberge Group sedimentary rocks. Quartz monzonites are also observed but of unknown age. The Tat Target was first worked in 1991 following the anomalous gold results reported from the BC Regional Geochemical Survey. Prospecting in the last 10 years have outlined a handful of chalcopyrite-pyrite showings with one sample assaying 4.24% Cu, 0.54 g/t Au and 35.1 g/t Ag. Other anomalous grab samples include 3.03% Cu, 1.02 g/t Au and 41.6 g/t Ag, and another at 2.09% Cu, 1.8 g/t Au and 164 g/t Ag. A small diamond drill program was completed in 2018-2019 targeting porphyritic alteration, although no significant mineralization was intersected.
The Central Target is located 7km southwest of Metla. Similarly, the Central Target geology is dominated by plutonic rocks, with Middle to Late Triassic quartz-diorite intruded by granitic intrusive rocks of the Sloko-Hyder Plutonic Suite. At surface there are stockwork quartz-molybdenite-pyrite veins, as well as several historic drillholes. East-west trending sheeted veins, up to 1.5m thick, contain molybdenite, which is locally massive and contain grades up to 1.45% Mo.
The Plum Target is located 8 km east of the Metla Target, immediately west of Tatsamenie Lake. The geology is dominated by Mississippian volcanic rocks of the Stikine assemblage, with local Lower Permian limestone. The aforementioned rocks are intruded by Triassic and Jurassic diorites and Eocene mafic dykes. Copper mineralization is vein-hosted with chalcopyrite and pyrite, including local chalcocite. This mineralization is found within broader zones of silica and pyrite alteration. Grab samples collected in 2020 found multiple occurrences with greater than 1% Cu, including one assay of 3.32% Cu.
Terr is located along the western slopes of the Sheslay River, 30 km east of the Trapper Target. The area is mapped as predominantly Jurassic sedimentary rocks with Triassic and Cretaceous intrusions. There have only been two small-scale exploration programs reported at Terr, focused on mapping and prospecting. Mapping outlined widespread alteration within the sedimentary and intrusive rocks, associated with mineralized quartz vein samples and assays up to 11 g/t Au.
The South Target is located approximately 35 km south of the Trapper Target. Geology includes greenstones of the Whitewater Metamorphic Complex, coarse clastic sedimentary rocks of the Stikine Assemblage and Late Triassic quartz diorite intrusive rocks. Known mineralization includes vein-hosted chalcopyrite and disseminated pyrite and chalcopyrite, although only reconnaissance geochemistry surveys have been completed in the target area to date. The target includes one of the highest-grade gold samples in silts from the BC Regional Geochemical Survey, with 990.7 ppb Au and elevated Cu-Ag-As. The area around this sample has not yet been tested and geochemical surveys, prospecting and mapping are planned.