The Darlin occurrence is in the head waters a small northwest flowing creek, approximately 2.5 kilometres southeast of Pudding Burn and at an elevation of approximately 1750 metres.

Regionally, the area lies within the central portion of the Purcell Anticlinorium, which consists of sedimentary argillites and quartzites and related intrusions of gabbro sills and dikes of the mid-Proterozoic (middle) Aldridge Formation and Moyie Intrusions. The mid-Proterozoic Hellroaring Creek stock intrudes this rock assemblage to the south west of the property and a major structural break (St. Mary's fault) has juxtaposed younger Precambrian rocks onto this rock formation to the south.

Locally, near the top of the lower Aldridge Formation, massive sulphide mineralization occurs in discrete beds varying in thickness from 0.10 metre to greater than 1.0 metres. Mineralization consists mainly of pyrrhotite with lesser galena, sphalerite and minor chalcopyrite. Alteration minerals consist of albite, silica and chlorite.

In 1991, samples of out crop, located approximately 900 metres to the north west, assayed up to 1.2 per cent zinc and 0.5 per cent lead (Property File - Daly, W. D. (1991-10-16): News Release: diamond drill program on Darlin claims). Later in 1991, a drill hole (D91-2) intersected several massive sulphide beds, over 70 metres of stratigraphy, returning up to 0.14 per cent lead and 3 grams per tonne silver over 0.5 metre, whereas another intersection yielded 0.67 per cent zinc over 0.3 metre (Assessment Report 22252).

In 1992, diamond drill hole H-92-02 yielded up to 0.24 per cent zinc and 0.63 per cent lead over 0.15 metre; other intersections included 3.4 per cent zinc over 0.07 metre, 3.0 per cent zinc over 0.10 metre and 1.4 per cent zinc over 0.10 metre (Property File - Kokanee Explorations Ltd. [1992-01-01]: 1992 Horn Summary Log). Also at this time, drill hole H-92-01 yielded intercepts with values of up to 1.35 per cent zinc, 0.98 per cent lead and 16.4 grams per tonne silver over 0.30 metre and 2.39 per cent zinc, 0.671 per cent lead and 22.0 grams per tonne silver over 0.20 metre (Property File - Minnova Inc. (1992-08-27): Drill Hole Record and Assays - H-92-1 - Horn).

Another area of mineralization, located approximately 0.6 kilometre to the south west on the Horn 80 claim, has been intersected by diamond drilling (hole H92-3ex) and consists of disseminated to blebby sulphides in scattered, thin, quartz-chlorite veinlets up to 2 centimetres thick, along with disseminated to semi-massive sulphides in beds varying in width from 2 to 25 centimetres. Mineralization consists of pyrrhotite with lesser arsenopyrite, sphalerite, galena and chalcopyrite.

In 1984 and, BP Resources completed programs of rock, silt and soil sampling on the area as the Pinetree 1-3 claims. In 1985, Trans-Artic Explorations completed an airborne geophysical survey on the area immediately west as the Angus and Burn claims. In 1991, Kokanee Exploration Ltd., on behalf of Chapleau Resources Ltd. and Barkhor Resources Inc., completed a program of geological mapping, geochemical surveys and 13 diamond drill holes, totalling 2700 metres, on the area as the Horn and Darlin claims. The following year, five diamond drill holes were completed on the area. This program confirmed the continuation of sulphides found in out crop, 1 kilometre away, and over 70 to 100 metres of stratigraphy. In 1995, Consolidated Ramrod Gold completed a single, 408.9-metre, diamond drill hole. In 1998 and 1999, Black Bull Resources conducted prospecting and soil sampling in the area as the Burn and Horn claims. During 2008 through 2012, the area was prospected and sampled as the Wilcum property by DW Exploration. In 2014, the area was prospected and rock sampled by C. Kennedy as the MS PEG property.