The Grizzly occurrence is located on a south-southeast–trending ridge northwest of Bluewater Creek in the headwaters of Clearwater Creek, a tributary of Blackwater Creek, approximately 2.3 kilometres south-southeast of Felucca Mountain.
Regionally, the area is underlain by thin-bedded, grey and grey-brown limestone and argillaceous limestone correlated with the Middle Cambrian Chancellor Group. The area has apparently undergone intense deformation with the development of overturned isoclinal folds and thrust faults as well as a strong fracture cleavage at approximately 130 degrees.
Mineralization consists of tetrahedrite, galena and pyrite as small blebs and lenses within quartz-carbonate veins, trending northwest and roughly parallel to bedding. The veins are hosted in argillaceous silty limestone associated with a northwest-trending shear zone. Tetrahedrite appears to be more common within quartz, and galena within carbonate. There are three to seven veins in the area that have strikes parallel to the regional trend. They range from 0.3 to 1 metre in width. There is very little wallrock alteration associated with the veins. One vein examined in detail appears to be emplaced in a zone of extensional fracturing along the nose of an anticline. Mineralization has been intermittently exposed in outcrop, opencuts/trenches and adits over a strike length of approximately 450 metres.
In 1981, a galena-bearing sample (3632) from a trench assayed 0.25 gram per tonne gold and 269 grams per tonne silver, whereas an undescribed (select?) sample (No.1) yielded 31.6 grams per tonne gold, 7170 grams per tonne silver, 19.4 per cent lead and 18.7 per cent copper (Assessment Report 09745).
In 1982, a sample from a 40-centimetre-wide mineralized vein located west of the adit portal yielded 1.89 per cent copper, 647 grams per tonne silver and 4.44 grams per tonne gold over 0.3 metre (Assessment Report 10954).
In 1983, bulk sampling of historical trenches, totalling 267.7 kilograms, yielded an average of 1.04 per cent copper, 10.74 per cent lead, 0.046 per cent tungsten tri-oxide, 700 grams per tonne silver and 2.13 grams per tonne gold (Assessment Report 11908).
In 1984, diamond drilling yielded intercepts of up to 16.90 per cent copper, 8.95 per cent lead, 6860 grams per tonne silver with 53.8 grams per tonne gold over 4.04 metres in hole A; 11.2 per cent copper, 14.8 per cent lead, 6240 grams per tonne silver with 27.9 grams per tonne gold over 4.75 metres in hole B; 6.14 per cent copper, 12.8 per cent lead, 3490 grams per tonne silver with 17.1 grams per tonne gold over 4.2 metres in hole D and 8.91 per cent copper, 9.12 per cent lead, 3560 grams per tonne silver with 22.3 grams per tonne gold over 3.05 metres in hole E (Assessment Report 12482).
In 1988, a picked sample (100347) of vein material from an adit dump yielded 0.71 per cent copper, 0.54 per cent lead, 315 grams per tonne silver and 0.95 gram per tonne gold (Assessment Report 18053).
In 2020, a grab sample (148580) of mineralized quartz vein from historical trenches yielded 2.14 grams per tonne gold, 1840 grams per tonne silver, 48.9 per cent lead and 10.2 per cent zinc, whereas a float grab sample (148543) from a mineralized boulder located near the mouth of the adit yielded 7.44 grams per tonne gold, 6670 grams per tonne silver, 31.6 per cent lead and 5.72 per cent copper (Assessment Report 39435).
In 2021, a subcrop sample (151637) from a pod of massive galena from the area of historical trenching assayed 0.99 gram per tonne gold, 2260 grams per tonne silver, 51.0 per cent lead and 4.6 per cent zinc, whereas an undescribed outcrop sample (151659), taken several hundred metres to the northwest and on strike of the historical adit, yielded 2.34 grams per tonne gold, 76 grams per tonne silver and greater than 1.0 per cent copper (Assessment Report 40486).
Work History
The occurrence is thought to have been originally discovered in the late 1800s or early 1900s, with a minor amount of high-grade ore being produced from a short, approximately 4.5-metre long, adit and a number of opencuts dating to the 1920s or 1930s.
In 1981, E&B Explorations Ltd. completed a program of prospecting and trenching on the area as the Grizzly and Sheep claims. The following year, Alred R. Allen prospected and sampled the claims. In 1983, Heron Resources Ltd. completed a program of soil and rock sampling of historical trenches and opencuts on the area as the Sheep, Grizzly and Liza claims of the Ram Group. In 1984, E.H. Parr completed eight short diamond drill holes, totalling 128.4 metres, on the Liza group of claims. In 1987, the area was prospected by Searchlight Resources Inc. as the Liza, Sheep and Grizzly claims. The following year, a program of geological mapping and geochemical (rock and soil) sampling was completed.
In 2020 and 2021, Pegasus Resources Inc. conducted programs of prospecting, geological mapping and rock sampling on the area as the Gold Mountain property.
