The G1 occurrence is located is located east of Eagle Creek and approximately 2 kilometres south of the eastern end of Spout Lake.
The Spout Lake area is underlain by andesites, basalts, calcareous tuffs and argillites of the Late Triassic Nicola Group. Nicola Group rocks are intruded by the Late Triassic to Early Jurassic Spout Lake Intrusive complex, an alkalic intrusive suite ranging in composition from pyroxenite through monzonite to syenite, and from batholithic size to small intrusive plugs, dikes and breccia bodies. Granodioritic rocks of the Triassic to Jurassic Takomkane Batholith intrude Nicola rocks east of the property. Outliers of alkaline plateau basalts of the Miocene to Pleistocene Chilcotin Group are present in the general area.
The Spout Lake area is underlain by a generally moderate to steeply northeast dipping sequence of Upper Triassic Nicola Group volcanic flows and volcaniclastic sedimentary rocks. A predominant set of north to northeast trending faults and a subordinate east to west trending fault set slightly complicates the geology. The Nicola volcanic flows comprise augite porphyry andesite, plagioclase porphyry andesite and fine-grained andesite. The volcaniclastic sediments include limestone breccia, limy andesite breccia, polymictic volcanic breccia and conglomerate. Intrusive rocks consist of microdiorite and porphyritic monzonite dikes.
Locally, as identified by drilling in 2017, stratiform mineralization occurs within sub-horizontal, limey (calcitic), volcaniclastic rocks (siltstones, grits and conglomerates) as carbonate replacement by early magnetite and subsequent chalcopyrite, similar to the nearby Spout (MINFILE 092P 120) occurrence. The true vertical thickness of the zone, as indicated by drilling, appears largest along a crudely central axis with intersects of up to 44 metres.
In 2017, a vertical drill hole (G16-01) intersected a true width of 26.6 metres grading 1.76 per cent copper, 10.29 grams per tonne silver, 0.27 gram per tonne gold and 35.8 per cent iron, while subsequent holes yielded intercepts of up to 1.31 per cent copper, 0.20 gram per tonne gold, 4.06 grams per tonne silver and 31.14 per cent iron over 43.45 metres in hole G17-16 (Kirkham, G. (2018-03-05): NI 43-101 Technical Report Mineral Resource Estimate for the Aurizon South Deposit, Lac La Hache Project).
In 2018, drillhole GP18-42 yielded 0.47 per cent copper over 58.5 metres, and other step-out drill holes successfully expanded the mineralized zone to the southeast (SRK Consulting (Canada), Inc. [2021-05-11]: Independent Technical Report for the Lac La Hache Project, Canada).
Further drilling, in 2020, further expanded the mineralized zone to the northeast and southeast, yielding intercepts including 0.93 and 0.25 per cent copper with 0.10 and 0.04 gram per tonne gold over 38.60 and 215.00 metres, respectively, in holes G20-47 and G20-49 (SRK Consulting (Canada), Inc. [2021-05-11]: Independent Technical Report for the Lac La Hache Project, Canada).
Work History
The area has been explored in conjunction with the nearby Spout Lake (MINFILE 092P 120) occurrence and a completed property exploration history can be found there.
In 2017, EnGold Mines Ltd. completed a 641 line-kilometre airborne high-resolution gravimetric and magnetic gradient survey on the area. This work identified eight anomalous zones, including the G1 zone which was subsequently drilled. An additional ground gravity survey was completed on the G1 zone later in 2017. By March 2018, 30 drill holes had been completed on the G1 occurrence over an area of approximately 250 by 150 metres.
During 2018 through 2020, EnGold Mines Ltd. completed programs of prospecting, soil sampling, diamond drilling and a geophysical survey on the area as part of the Lac La Hache property.
In March of 2021, an updated mineral resource was reported for the combined openpit and underground Spout Lake deposit and the G1 underground deposit of 6 500 000 million tonnes indicated grading 0.33 per cent copper, 1.34 grams per tonne silver, 0.05 gram per tonne gold and 11.62 per cent magnetite with an additional 9 760 000 million tonnes inferred grading 0.47 per cent copper, 2.01 grams per tonne silver, 0.07 gram per tonne gold and 13.29 per cent magnetite using an openpit cut-off grade of 0.20 per cent copper equivalent and an underground cut-off grade of 0.70 per cent copper equivalent (SRK Consulting (Canada), Inc. [2021-05-11]: Independent Technical Report for the Lac La Hache Project, Canada). The G1 occurrence alone was reported at 1 710 000 tonnes inferred grading 1.25 per cent copper, 6.45 grams per tonne silver, 0.19 gram per tonne gold and 30.94 per cent magnetite (SRK Consulting (Canada), Inc. [2021-05-11]: Independent Technical Report for the Lac La Hache Project, Canada).
