The Sunshine (L.336), Fern (L.332) and Fern No. 1 (L.334) occurrences are centered on a west flowing tributary of Cass Creek, approximately 1 kilometre northeast of the creek mouth and 30 kilometres southwest of Port Alberni.

The area is underlain by Upper Triassic Vancouver Group, Quatsino Formation limestone in contact with andesite of the Lower Jurassic Bonanza Group. The strata are intruded by diorite of the Early to Middle Jurassic Island Plutonic Suite. The intrusive has altered the limestone to masses of garnet and epidote, while the andesite is intensely fractured and metamorphosed containing bunches and stringers of garnet, epidote and tremolite.

Locally, small lenticular bodies of magnetite occur in the contact altered limestone, the largest covers a 7.5- by 1.5-metre area. Other irregular shaped masses of very impure rocky magnetite, impregnated with considerable pyrite and chalcopyrite occur. Two showings of micaceous hematite associated with magnetite are also present. The most promising showing is reported to be a vein, striking 155 degrees and from 60 to 90 centimetres wide, consisting of alternating masses of pyrrhotite and chalcopyrite.

At least three tunnels were driven on the deposits in the early part of the century. From one of the tunnels, driven on the pyrrhotite-chalcopyrite vein, about 6.3 tonnes of ore was shipped, from which was extracted 758 kilograms of copper (Minister on Mines Annual Report 1928). Mineral Policy data indicates that from 5 tonnes of ore mined in 1916, 869 kilograms of copper and 218 grams of silver were produced.

In 1988 and 1989, Barona Resources completed programs of soil and rock sampling, geological mapping and ground geophysical surveys on the area as the Gold Nugget claim. Two chip samples (C4886 and C4888) from the Fern (L.332) assayed up to 10.5 grams per tonne silver, 0.12 per cent copper; while one chip sample (D2759) from the Sunshine (L.336) assayed 13.5 grams per tonne silver and greater than 1 per cent copper (Assessment Report 17714).

In 2007 through 2013, Nahminto Resources completed a program of prospecting, geological mapping, geochemical sampling, a ground magnetometer survey and airborne geophysical surveys on the area as the TJM claims, which are part of the Nahmint property. In 2007, a select outcrop grab sample of weakly foliated copper skarn from a small, 2 by 1.5 metre, adit assayed 3.7 per cent copper and 8.7 grams per tonne silver (Assessment Report 29252). The same year, a select grab sample (362674) from a 1.0 metre thick skarn zone exposed in a creek bed yielded 5.24 per cent copper and 13.7 grams per tonne (Assessment Report 29574). In 2013 Equitas Resources Corp. conducted geological mapping, rock, soil and stream moss mat sampling at the Three Jays North area of the Nahmint property.

In 2020 a structural analysis via photo interpretation and minor prospecting and stream and rock sampling were conducted on the Nahmint property for tenure holder B. McKinney.