The Black Prince occurrences are located on the western slopes of Hecate Mountain, approximately 2.5 kilometres north-northeast of the mouth of Cass Creek and 28 kilometres southwest of Port Alberni.

Volcanics of the Lower Jurassic Bonanza Group overlie Upper Triassic Vancouver Group rocks consisting of Karmutsen Formation volcanics and Quatsino Formation limestone. The strata may be intruded locally by diorite and granodiorite of the Early to Middle Jurassic Island Plutonic Suite. The limestone of this skarn deposit may be from the Quatsino Formation or from beds found in the upper part of the Karmutsen Formation.

Locally, six separate masses of pure and rocky magnetite occur along a northeast trend for about 60 metres. The largest of these masses has an exposure of about 23 square metres. They are irregular in shape and occur in association with a fine grained, cherty, porphyritic andesite or tuff, near its contact with intrusive hornblende diorite. Limestone is reported to occur within a few hundred metres.

Two bodies of high-grade, lustrous, granular magnetite occur. These are strongly sheeted, with sheets from about 4 to 5 centimetres thick, having a sugary texture. Pyrrhotite, pyrite, copper minerals and garnet are also reported. A sample assayed 70.2 per cent iron, 1.4 per cent silica and traces of phosphorous and sulphur (Minister of Mines Annual Report 1916).

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 (C4858 and C4865) assayed up to 19.7 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, part of the Nahmint property. In 2009, a select outcrop grab sample (813568) from a 0.25 metre thick mineralized skarn assayed 1.85 per cent copper, 7 grams per tonne silver and 48 per cent iron (Assessment Report 31248). 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.