Summary:
Beartrack
Gold mineralization at Beartrack exhibits many of the characteristics of the class of gold deposits known as mesothermal, orogenic, or shear zone-hosted deposits. In these deposits, gold is deposited at crustal levels at depths of 3 km to 20 km (1.9 mi to 12.4 mi) and at temperatures from 200°C to 400°C. Deposits may have a vertical extent of up to 2 km and lack pronounced zoning. Gold-bearing quartz veins and veinlets with minor sulphides crosscut a wide variety of host rocks and are localized along major regional faults and related splays (Robert, 2004; Goldfarb and Groves, 2015). The wall rock is typically altered to silica, pyrite, and muscovite within a broader carbonate alteration halo (Ash and Alldrick, 1996).
Mineralization at Beartrack consists of quartz-pyrite-arsenopyrite (gold-iron-arsenic-sulphur) veins and veinlets occurring in a broad halo of sericitic alteration related to the PCSZ. The PCSZ exhibits both brittle and ductile deformation and is interpreted to be a deep-seated regional structure that has been active for a protracted period of time. Mineralization does not exhibit any zonation over 750 m (2,460 ft) vertically. All these characteristics are typical of mesothermal gold deposits.
In the case of gold mineralization at Beartrack, the characteristics and controls of mineralization are reasonably well known. The primary control on mineralization is the regional, north-northeast trending PCSZ and an important secondary control is the Proterozoic Yellowjacket Formation, which appears to be a more favourable host rock than the Proterozoic intrusive rock. These factors, along with the known characteristics of orogenic gold mineralization, will guide future exploration activity at Beartrack.
Gold mineralization on the Beartrack property is associated with a major gold-arsenic-bearing hydrothermal system where shear, stockwork, vein, and breccia-hosted mineralization has been identified in four areas over more than 5 km of strike length. All mineralization is spatially related to, and primarily controlled by, the Panther Creek Shear Zone (PCSZ). Gold mineralization has been intersected over a vertical range of 750 m with no indication that mineralization stops, that grade diminishes or of mineral or metal zonation with depth. All areas drilled to date at Beartrack display similarities in style of mineralization and alteration with only slight variations in geochemistry. The primary difference between areas is host rock.
Mineralization at Beartrack is hosted by a Proterozoic rapakivi granite intrusion and Proterozoic metasedimentary rocks in proximity to the PCSZ, which is the primary control on mineralization. In the Yellowjacket Formation, stockwork veinlets are predominantly 0.2 cm to 1.0 cm thick, with larger veins ranging up to 5.0 cm. Individual veins are filled with massive to crystalline milky to light gray quartz, containing fine-grained pyrite and arsenopyrite, along with minor marcasite, as disseminations or concentrations along vein margins. In the rapakivi granite, vein zones 0.5 cm to 10.0 cm thick have been emplaced into pre-existing irregular joint and fractures sets. Individual veins are generally discontinuous along strike and may be offset by post-mineral shearing. Galena, sphalerite, chalcopyrite, tennantite-tetrahedrite are present locally (Economic Geology Consulting, 2013; Konyshev, 2015) and trace amounts of petzite, hessite and a silver - mercury amalgam have also been noted (SGS, 2018).
The primary control on mineralization at Beartrack is the north-northeast-trending PCSZ. Mineralization occurs within a broad zone of fracture-controlled sericite-pyrite alteration that can extend up to 150 m (500 ft) from the PCSZ. Mineralization occurs over a vertical range of more than 750 m (2,460 ft) and exhibits no apparent vertical zonation in metal content, mineralogy, or alteration with only slight variations in geochemistry along strike. Mineralization is open at depth and along strike.
South Deposit Mineralization
The South deposit at Beartrack is lens-shaped in plan, measuring approximately 1,300 m (4,250 ft) in length and reaching a maximum width of 140 m (450 ft) while decreasing to less than 10 m (30 ft) at each end. Oxidation extends from between 30 m (100 ft) to over 300 m (1,000 ft) in depth. Mineralization is open at depth and along strike to the south.
North Deposit Mineralization
The oxide body in the North deposit is 1,600 m (5,250 ft) in length, 10 m to 200 m (30 ft to 650 ft) wide and has been intersected by drilling to depths locally in excess of 250 m (820 ft). Gold mineralization occurs primarily as a network of oxidized quartz-pyrite-arsenopyrite stockwork and sheeted veins, which commonly overprint older mylonitized zones in the quartz monzonite near the PCSZ. In general, mineralization does not extend to the depths recorded in the South deposit or Ward’s Gulch and tends to be lower grade.
Arnett
Gold mineralization at Arnett is enigmatic, exhibiting some of the characteristics of intrusion-related gold deposits, but also exhibiting some of the characteristics of orogenic gold deposits. In intrusion-related deposits, gold is deposited at depths from less than 1 km to over 8 km (0.6 mi to 5 mi) with a typical range of 4 km to 6 km (2.5 mi to 3.7 mi). Given the substantial range of depths over which intrusion-related gold deposits may form, homogenization temperatures vary dramatically, but fluids tend to be of low salinity and high in CO2. A wide variety of deposit types can occur in intrusion-related gold systems. Intrusion and/or country rock hosted deposits may consist of skarns, replacements, disseminations, stockworks and veins. The most common occurrence is sheeted, gold-bearing quartz veins and veinlets with minor sulphides, often occurring in the cupola of the source intrusion.
In the case of gold mineralization at Arnett, many of the characteristics of mineralization are known but the controls of mineralization are poorly understood. Mineralization at Arnett consists of quartz-iron oxide (pyrite) veinlets (gold-iron-sulphur) occurring in a broad halo of potassic and sericitic alteration. Trace elements are not strongly anomalous; however, bismuth and tellurium have the strongest correlations with gold while iron, copper, mercury and molybdenum have much weaker correlations with gold. Alteration types and geochemical associations suggest high- temperature mineralization, that could be related to an intrusion. Airborne magnetics support the presence of a shallow intrusion below the Haidee and Haidee West targets. It is a reasonable conclusion that this intrusion may be genetically related to mineralization and the extensive potassic alteration and hypogene alteration of magnetite to specularite found in the area. These factors will guide future exploration activity at Arnett.
Gold mineralization on the Arnett property is associated with wide-spaced quartz-FeOx (pyrite)- Au veinlets hosted primarily by the Cambro-Ordovician Crowded Porphyry, although the Leucogranite is mineralized in the Italian mine and Thompson-Hibbs area. Gold is associated with wide-spread sericitic and potassic alteration, both of which are structurally controlled. Pyrite is coarse-grained and typically occurs along veinlet margins. Native gold is present locally in oxidized pyrite. Mineralization is not yet known to extend into the adjacent metasedimentary rocks.
There are several mineralized areas on the Arnett portion of the Property but only the Haidee area contains a Mineral Resource. It should be noted that historical gold resources were defined by AGR in five zones, the Haidee Main, Haidee West, Haidee East, Little Chief, and Little Chief Extension. Revival combined the Haidee Main, Haidee West, and Haidee East areas into one larger area simply called the Haidee area, and the Little Chief Extension has been renamed Haidee West.