The Pyramid Property is in the northwest of British Columbia, approximately 50 kilometres north of Dease Lake. The property lies within the northern part of the Late Triassic to Early Jurassic Quesnel Terrane.
The property is underlain by volcanic and meta-sedimentary rocks of the Jurassic Shonektaw Formation. These rocks have been intruded by Triassic-Jurassic intrusives including hornblende diorites, quartz diorites, and granodiorites. The project has experienced regional greenschist facies metamorphism. The dominant foliation is to the northwest.
Early stage (phase) epidote-quartz veins are steeply dipping with various strike orientations and are mapped throughout the West zone and in northern extents of the East zone. The veins are related to a propylitic halo about the West zone that measures 4.5 kilometres along the long axis. Within this region, vein mineralogy is predominantly quartz with lesser epidote, chlorite, calcite and pyrite. Veins typically measure less than 1 centimetre and have alteration halos of quartz-chlorite-epidote. Inboard and contiguous with the propylitic alteration is the inner propylitic alteration domain that hosts veins of the same mineralogy but with increased percentages of quartz and pyrite in veins with chalcopyrite and actinolite, especially in halos to veins. Epidote-bearing quartz veins are cut by main stage and late-stage quartz veins throughout the West zone. Epidote-bearing quartz veins are cut by main stage and late-stage quartz veins throughout the West zone.
Main stage veins composed of predominantly quartz are abundant in the West zone mineralized area and range from 1 to 5 per cent by volume within the altered rocks. The veins are distributed inboard of the propylitic alteration domains and are related to pervasive silicification, sericitic alteration and disseminated chalcopyrite. In addition to quartz, common vein minerals include pyrite, chalcopyrite and chlorite. In phyllic altered domains the veins can contain minor calcite, anhydrite and sericite. Textures are notably finer grained than feldspar-bearing veins and can be aphanitic, blocky, banded and rarely coxcomb. Vein boundaries are sharp to diffuse, and halos range from 1 to 20 centimetres and are characterized by silica, chlorite, pyrite and chalcopyrite. Many orientations of veins are documented in the stockwork-style veins
Telescoped over early and main stage porphyry veins in the West zone are Late-stage epithermal milky white quartz veins, stockwork and breccias. The veins are found throughout the West zone at various strike orientations and subvertical dips. The veins range in width from 1 to 100 centimetres wide, have sharp margins, coarse-grained blocky, banded and coxcomb textures and lack alteration halos. Mineralogy includes milky quartz, white calcite, deep green chlorite, black to beige sphalerite, galena, pyrite, chalcopyrite, tetrahedrite and stibnite. In general, these late veins comprise very few of the hydrothermal veins in the West zone but are associated with elevated copper and gold. In the northwestern extent of the West zone are the most abundant shallow level veins where stockwork, siliceous breccias and veins cut volcano-sedimentary strata of the same mineralogy but with increased percentages of quartz and pyrite in veins with chalcopyrite and actinolite, especially in halos to veins.
The 2016 sampling program was designed to increase information in preparation for Reverse Circulation drilling. Most of the sampling was carried out on epithermal veins to determine if there were any metal zonation patterns. No specific zonation patterns were noted but elevated lead and zinc were found to occur in later epithermal style veins.
A total of 5 short holes (663.97 metres) were completed on the West Zone in 2016. The target depth of 200 metres for each hole was not met due mainly due to the presence of groundwater in many of the holes. Drilling encountered anomalous mineralization in all the holes. Although no ore grade intercepts were encountered, drilling did confirm the presence of widespread hydrothermal porphyry style alteration. Hole PY-16-1 (108.21 metres) targeting a narrow chargeability high on the edge of a larger high. Narrow intervals of megacrystic diorite porphyry, primarily feldspar hornblende porphyry from 18.29 metres to 22.86 metres (4.57 metres) graded 0.02 gram per tonne gold, 0.14 gram per tonne silver, and 0.12 per cent copper (Assessment Report 36779). Further downhole an intercept from 48.77 to 50.29 metres (1.52 metres) contained quartz veining grading 2.5 grams per tonne gold and 40.3 grams per tonne silver (Assessment Report 36779). Moderate to strong quartz-sericite-pyrite alteration decreases with depth.
In 2017, OK2 Minerals reported that diamond drill holes PD-17-02 and PD-17-03 were drilled 800 metres apart on the West Zone, testing shallow to deep IP chargeability anomalies coincident with anomalous gold-copper soil and rock geochemistry. Drill hole PD-17-02 (485 metres) assayed 481.5 metres of 0.16 gram per tonne gold, 0.12 gram per tonne silver and 0.02 per cent copper, equaling 0.19 gram per tonne gold equivalent (Press Release, OK2 Minerals Ltd., December 18, 2017).
WORK HISTORY
Gold Jubilee Capital Corp. staked the Pyramid property in 2013 and conducted a field program which consisted of collecting 1059 soil, 93 stream sediment, and 19 rock samples, reconnaissance scale (1:10,000) geological mapping, and a 408 line-kilometre airborne geophysical survey (Assessment Report 34719).
In 2014 the company conducted a program that consisted of 695 soil, 33 rock, and 3 silt samples and a 32.3 line-kilometre Volterra 3D induced-polarization survey. The best hand sample assayed 11.5 grams per tonne gold, 7.0 grams per tonne silver and 0.08 per cent copper (Exploration and Mining in British Columbia 2014, page 109). The 32.6-line kilometre 3D IP survey was carried out over the MT and Central Zones at reconnaissance spacing (400 metre). This resulted in promising chargeability and resistivity anomalies at both the Central and MT Zones. Soil sampling was focused on infill sampling of the Central Zone and extension and infill sampling of the MT Zone. Both areas yielded very anomalous results, but the MT zone stood out given its significant size.
In 2015, the MT Zone was renamed the West Zone. A total of 236 rock samples, 983 soil samples were collected. A 34.1 kilometres Induced Polarization (IP) survey was completed. The bulk of the 2015 program was focused on defining drill targets on the West Zone. Infill 3D IP was completed on the West Zone bringing the line spacing from 400 metres to 200 metres. 2D IP was completed over the East Zone. Both surveys delineated significant chargeability anomalies that were coincident with geochemical anomalies. Additional infill soil sampling was completed bringing line spacing to 100 metres on the West Zone and 200 metres at the Central Zone. Geological mapping was completed on the West Zone along with more detailed rock sampling there and on the East Zone.
In 2016 Gold Jubilee Capital Corp changed the company’s name to “OK2 Minerals Ltd.” Exploration in 2016 consisted of 663.9 metres in 5 Reverse Circulation holes on the West Zone. A total of 162 rock samples, 23 soil samples and 2 stream sediment samples were also collected.
The 2017 exploration program at the Pyramid gold-copper project consisted of 11 RC drill holes and three diamond drill holes totalling 1366 metres at the West zone and Central zone. No significant intercepts were reported for the Central zone.
