The Darlin (Horn) occurrence is located at an elevation of approximately 1400 metres on a north-facing slope, east of Pudding Burn Creek and approximately 1.6 kilometres south of the St. Mary River.

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 Mesoproterozoic (Middle) Aldridge Formation and Moyie Intrusions. The Mesoproterozoic Hellroaring Creek stock intrudes this rock assemblage to the southwest 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. Mineralization has been traced, intermittently, by drilling and in outcrops over a west-northwest–trending strike distance of approximately 2 kilometres.

Also in the occurrence area, pegmatites host anomalous values of tin.

In 1985, two chip samples (TC-85-128 and -127) of pegmatite yielded 0.032 and 0.040 per cent tin, respectively, and other samples yielded up to 0.004 per cent tungsten (Assessment Report 13871).

In 1991, a drillhole (D91-2), located approximately 950 metres west of the main outcrop occurrence, intersected several massive sulphide beds across 70 metres of stratigraphy and yielded up to 0.14 per cent lead and 3 grams per tonne silver over 0.5 metre (142.6 to 143.1 metres down hole); another intersection yielded 0.67 per cent zinc over 0.3 metre (195.3 to 195.6 metres down hole; Assessment Report 22252). Another drillhole (D91-3), located approximately 650 metres northwest of the outcrop occurrence, intersected several small beds of massive sulphides and a granophyric fragmental at the top of a gabbro sill yielding 0.26 per cent zinc over 0.2 metre (67.5 to 67.7 metres down hole; Property File - Stephenson, L.G. (1991-11-01): Report on the phase I exploration program on the Darlin Claims, St. Mary's Lake Area, Kimberley).

Also in 1991, a sample (no.1) of bedded massive pyrrhotite with sphalerite and galena from the main outcrop occurrence yielded 0.53 per cent lead and 1.43 per cent zinc, and two float samples of mineralized quartz from a road landing near the location of drillhole D91-2 yielded values of up to 5.59 per cent lead, 3.02 per cent zinc, 94.7 grams per tonne silver and 4.46 grams per tonne gold (Property File Kokanee Explorations Ltd. (1991-01-01): Horn Property Claims Map).

In 1992, diamond drill hole H-92-02, located approximately 1000 metres southeast of the main outcrop occurrence, yielded intercepts including: 3.44 per cent zinc, 1.00 per cent lead and 9.1 grams per tonne silver over 0.07 metre (195.00 to 195.07 metres down hole), 2.89 per cent lead, 2.95 per cent zinc, 58.9 grams per tonne silver and 0.10 gram per tonne gold over 0.10 metre (251.40 to 251.50 metres down hole) and 0.98 per cent lead, 1.35 per cent zinc and 16.4 grams per tonne silver 0.30 metre (263.10 to 263.40 metres down hole); a nearby drillhole (H-92-01) yielded intercepts of up to 0.09 per cent lead, 0.85 per cent zinc and 2.2 grams per tonne silver over 0.20 metre (191.90 to 192.10 metres down hole; Property File - Minnova Inc. [1992-07-17]: ICP Reports - 1992 - Horn).

Another area of mineralization, located approximately 350 metres southwest of hole H-92-02 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.

Work History

In 1971, Kerr Addison Mines Ltd. conducted a regional program of geological mapping and geochemical (soil and silt) sampling on the area as part of the Dewar Creek project.

The area was staked in 1983 by BP Resources after anomalous tin and tungsten values were identified in stream sediment samples. In 1984 and 1985, BP Resources completed programs of rock, silt and soil sampling on the area as the Pinetree 1-3 claims. Also in 1985, Trans-Arctic Explorations completed an airborne geophysical survey on the area immediately west as the Angus and Burn claims.

In 1991 and 1992, Kokanee Exploration Ltd., on behalf of Chapleau Resources Ltd. and Barkhor Resources Inc., completed a program of geological mapping, geochemical (rock and soil) 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 outcrop, 1 kilometre away, and across 70 to 100 metres of stratigraphy.

In 1995, Consolidated Ramrod Gold completed a single diamond drill hole, totalling 408.9 metres. 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, DW Exploration conducted programs of prospecting, hand trenching and rock sampling on the area as the Wilcum property. Also in 2009, Taranis Resources Inc. conducted a program of prospecting, geological mapping and silt sampling on the area to the south as the Sullivan West property. Silt samples yielded anomalous gold values of up to 452.8 part per billion, with six samples assaying greater than 100 parts per billion gold (Sample A7-1315; Assessment Report 31237).

In 2014, the area was prospected and rock sampled by C. Kennedy as the MS PEG property.