The Mike 4 occurrence is located at an elevation of approximately 780 metres on a northeast-facing slope, south of the Chemainus River and approximately 10.5 kilometres north-northwest of the community of Lake Cowichan.

Regionally, the area is underlain by chert, siliceous argillite and siliciclastic rocks of the Mississippian to Pennsylvanian Fourth Lake Formation (Buttle Lake Group), calc-alkaline volcanic rocks of the Middle to Upper Devonian Nitinat Formation (Sicker 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. The sediments and pyroclastics are silicified and hornfelsed near the intrusive contact. Undivided sedimentary rocks of the Upper Cretaceous Nanaimo Group locally overlay the previous units.

The Sicker Group in the is comprised of cherty tuffs to agglomerates of the Upper Devonian McLaughlin Ridge Formation. The Buttle Lake Group comprises chert, argillite, siltstone, sandstone, conglomerate and minor limestone with pyroclastic flows of the Mississippian to Pennsylvanian Fourth Lake Formation, and limestone, marble with minor chert, argillite and sandstone of the Upper Pennsylvanian to Lower Permian Mount Mark Formation. The contacts between these formations appear to be fault related. The rocks are weakly regionally metamorphosed, probably to lower greenschist facies, and are folded along a northwest-trending fold axis.

Mineralization occurs in east-trending shears and quartz veins hosted in the Mississippian to Pennsylvanian Fourth Lake Formation fine-grained sediments associated with Triassic gabbro dikes. Quartz veins, up to 1.0 metre wide, contain pyrite, pyrrhotite, chalcopyrite, minor arsenopyrite and anomalous gold values (up to 60.0 grams per tonne gold).

The main showing consists of five east-trending quartz veins (No.1 to 5) exposed over a length of approximately 250 metres in a northeast direction. The uppermost vein (No. 5) is comprised of vuggy, bluish-grey quartz within a shear zone up to 2.0 metres in width striking 098 degrees and dipping 83 degrees southwest. A feldspar porphyry dike subparallels the quartz vein several metres to the south.

In 1986, sampling across 0.1 metre, along a strike length of 14 metres, averaged 18.62 grams per tonne gold, with the highest sample yielding 60.0 grams per tonne gold over 0.07 metre (Assessment Report 15578). Sampling of the four other quartz veins (1 to 4) yielded 27.09, 22.29, 1.13 and 12.00 grams per tonne gold over widths of 0.10, 0.05, 0.10 and 0.02 metre, respectively (Assessment Report 15578).

Also at this time, diamond drilling on the main upper vein (No. 5) yielded intercepts including: 1.43 grams per tonne gold over 0.26 metre in hole M86-1 and 5.49, 2.74, 0.69 and 3.43 grams per tonne gold over 0.08, 0.21, 0.41 and 0.11 metre, respectively, in hole M86-2, and a diamond drill hole (M87-1) on the lower northeast veins (No. 1 to 4) yielded intercepts of 1.20, 2.85 and 1.68 grams per tonne gold over 0.14, 0.10 and 0.24 metre, respectively (Assessment Report 15578).

In 2022, a 0.3-metre chip sample (907449) from a vein in the main occurrence area assayed 3.98 grams per tonne gold (Assessment Report 42049).

Approximately 850 metres to the west of the gold vein occurrences and in the headwaters of Ridgeway Creek, a 10-centimetre wide shear zone, striking 133 degrees and dipping 65 degrees northwest cuts silicious siltstone and is mineralized with pyrrhotite and pyrite.

In 1983, a stream sediment sample (8221918) from Ridgeway Creek yielded greater than 10 000 parts per million gold and contained visible gold (Assessment Report 11347). The following year, a float sample from the creek assayed 1.24 per cent zinc and 23.7 grams per tonne silver (Assessment Report 12606).

In 1986, four samples (14521-14524) from the Ridgeway Creek shear zone yielded values of up to 0.51 per cent copper, 4.4 grams per tonne silver, 0.018 per cent cobalt and 0.006 per cent tungsten, and a float sample (14512) of mineralized quartz taken downstream of the shear zone assayed 0.14 per cent copper and 0.101 per cent tungsten (Assessment Report 15578).

Work History

In 1983 and 1984, Noranda Mining and Exploration Inc. conducted programs of geological mapping and geochemical (rock, silt and soil) sampling on the area as the NTI 1-4 claims.

In 1986 and 1987, International Cherokee Developments Ltd. conducted a program of geological mapping, trenching, geochemical (rock, silt and soil) sampling, a 4.3 line-kilometre ground magnetic and electromagnetic (VLF) survey and four diamond drill holes, totalling 353.0 metres, on the area as the Mike property.

In 2010, Rock-Con Resources Inc. completed a program of remote sensing analysis on the area.

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.