The Sognidoro occurrence is located at an elevation of approximately 630 metres on a southwest-facing slope, northeast of Rheinhart Creek and approximately 1.2 kilometres southeast of the south end of Rheinhart Lake.

Regionally, the area is underlain by chert, siliceous argillite and siliciclastic rocks of the Mississippian to Pennsylvanian Fourth Lake Formation (Buttle Lake Group) and volcaniclastic rocks of the Middle to Upper Devonian Mclaughlin Ridge Formation (Sicker Group). These rocks are intruded by granodiorite and quartz diorite of the Early to Middle Jurassic Island Plutonic Suite and gabbroic to dioritic rocks of the Triassic Mount Hall Gabbro. Undivided sedimentary rocks of the Upper Cretaceous Nanaimo Group locally overlay the previous units.

Mineralization comprises pyrite, chalcopyrite, galena, bornite, molybdenite, azurite, malachite and chalcanthite hosted within quartz veins. Pyrite, chalcopyrite, hematite and magnetite also occur within jasper horizons. Galena was observed in a quartz vein cutting a diabasic outcrop within the south-flowing creek on the western side of the claim. Base and precious metal values are locally associated with this mineralization.

The main vein is the McDougall vein, striking 320 degrees and dipping 70 degrees east, which has been traced for approximately 265 metres along strike. The vein is reported to pinch and swell along strike with an average with of approximately 0.6 metre in the north half and 1.8 to 2.4 metres in the south half. Mineralization apparently increases in quantity toward the northern end of the vein and comprises primarily chalcopyrite and pyrite with minor sphalerite and galena. The vein is hosted in, and conformable with, chloritic schists. The McDougall vein may be truncated by faults at both ends with a suggested right-lateral displacement of 200 metres at the northern extent.

In 1984, four previously collected samples (C1 to C4) from pit B on the main quartz vein were reported to have yielded from 3.28 to 37.4 grams per tonne gold and 3.4 to 22.2 grams per tonne silver, and re-analysis (ICP) of the samples is reported to have assayed up to 182.00 grams per tonne gold and 86.5 grams per tonne silver (Assessment Report 13568). Later that year, two further samples (1 and 2) from the hangingwall of the vein yielded 27.9 and 20.2 grams per tonne gold with 12.3 and 11.3 grams per tonne silver, respectively (Assessment Report 13568).

In 1987, a grab sample (17815) from near the centre of the vein exposure assayed 3.26 grams per tonne gold (Assessment Report 16802).

In 2011, a rock sample (2.2) from the McDougall vein area assayed 1.30 grams per tonne gold (Assessment Report 32279). Later that year, select grab samples of quartz-jasper hosting chalcopyrite and bornite from the vein area assayed up to 9.35 per cent copper, 28.9 grams per tonne silver and 3.4 grams per tonne gold (Samples 18070 and18704; Assessment Report 32850). Also at this time, a select sample (18075) of oxidized jasper-quartz hosting bornite and chalcopyrite, taken approximately 350 metres to the east-southeast of the main vein and at an elevation of approximately 800 metres, assayed 5.69 per cent copper and 16.1 grams per tonne silver (Assessment Report 32850).

In 2022, a grab sample (907438) from the main vein area assayed 0.12 gram per tonne gold and 0.75 per cent copper (Assessment Report 42049).

Two jasper horizons are exposed at elevations of approximately 760 and 850 metres and approximately 400 to 600 metres to the northeast of the McDougall vein. These are also hosted in and conformable with the chloritic schists. The horizons are exposed over 30 and 25 metre widths and along strike for 200 metres and 50 metres respectively. The jasper appears to occur in lenses but it could be part of a continuous horizon displaced by right-lateral faulting. The jasper, brick to scarlet red with metallic grey patches, is cut by numerous quartz veinlets (up to 0.5 centimetre). Iron oxides and malachite staining occurs locally. Pyrite and chalcopyrite occur primarily in the veinlets. Finely disseminated and massive magnetite occurs within the jasper ‘lenses’.

In 1987, six grab samples from the upper jasper horizon yielded values of up to 1.00 gram per tonne gold, 2.9 grams per tonne silver, 0.51 per cent copper and 0.013 per cent molybdenum (Samples 17827 and 17840; Assessment Report 16802).

A minor chalcopyrite-sphalerite–bearing showing in schist is reported on the west side of upper Rheinhart Creek, approximately 200 metres west-southwest of the Sognidoro (McDougall vein) occurrence. A gossanous area is also reported 200 metres further west and uphill from the sulphide showing.

In 1984, a previously collected sample from the mineralized schist was reported to have assayed 0.17 gram per tonne gold, 3.4 grams per tonne silver, 0.11 per cent copper and 1.18 per cent zinc, and samples collected at this time yielded up to 0.20 per cent copper and 0.40 per cent zinc (Assessment Report 13568).

Work History

An approximately 91.5-metre long adit is reported on the nearby Trek claims to the east of the Sognidoro occurrence, possibly dating to as early as 1918. The adit was driven into a schist-jasper outcrop reported to carry gold values.

In 1983 and 1984, Canamin Resources Ltd. conducted programs of prospecting and geochemical (rock and soil) sampling on the area as the Sognidoro claims. In 1987, Canamin Resources completed a further program of prospecting, geological mapping, trenching, geochemical sampling (rock, silt, soil, heavy mineral) sampling and ground electromagnetic and magnetic surveys on the Sognidoro claims.

Also during 1982 through 1988, Imperial Metals Corp. conducted programs of geological mapping, geochemical (rock and soil) sampling and ground and airborne electromagnetic and magnetic surveys on the area immediately northeast as the Imperial H claim and Imp group of claims.

During 2009 through 2011, Rock-Con Exploration completed programs of spectral analysis, prospecting and geochemical (rock and soil) sampling on the Sognidoro property.

In 2021, Crest Resources Inc. conducted a program of prospecting and geochemical (rock, silt and soil) sampling on the Sognidoro property. In 2022, Reverend Mining Corp. completed a further program of prospecting and geochemical (rock, silt and soil) sampling on the Sognidoro property.