The Hilltop and Roadside showings are located on Aaron Hill, roughly 7.5 kilometres east of Castlegar. The showings were discovered in 2009 by Swift Resources Inc. as a part of its Amazing Grace project.
Regionally, the area is underlain by granite and granodiorite of the Late to Middle Jurassic Nelson Intrusions and small areas of volcanic rocks of the Lower Jurassic Elise Formation (Rossland Group).
Locally, the property covers a portion of the multi-phase Bonnington pluton, which has intruded sedimentary, volcanic and subvolcanic rocks of the Jurassic Rossland Group. These older rocks occur as embayments, pendants, and possible fault slices within the pluton, and are typically metamorphosed with relic textures preserved only locally. An east to southeast trending pendant of mafic volcanics and subvolcanic intrusives, belonging to the Rossland Group (Elise Formation), occurs in the central part of the property.
The most prominent structural feature on the property are late-stage (Eocene) faults. Large zones of intense alteration (sericitic, argillic, carbonate, silica) occur along northwest trending normal faults, with gold-bearing quartz veins along and in the hangingwall of these structures.
In 2010, rock samples of the Roadside showing returned values up to 85.6 grams per tonne gold (Assessment Report 31442).
In 2011, two grab sampling (5319 and 5320) of trench TR-11-02 located on the Roadside zone yielded 2.6 and 1.0 grams per tonne gold, respectively (Dandy, L. (2018-05-25): Technical Report on the Cobalt Hill Property)
The Hilltop zone, roughly 100 metres to the east, is an area of intense sericite alteration with patchy galena and sphalerite, where samples have returned up to 286.6 grams per tonne silver, 0.26 per cent lead and 0.67 per cent zinc (Assessment Report 31929).
Work History
Previous work in the area has been centred on the Maud S. and Meister (MINFILE 082FSW325) showings to the south east.
Firestone ventures optioned the property in 2004 and in 2005 completed a program of prospecting, rock and soil sampling and geological mapping. In 2007 and 2008, Medallion Resources examined the property and completed a helicopter-borne mag-AeroTEM-radiometric survey and soil sampling. During 2009 through 2011, Cassidy Gold and Swift Minerals completed programs of prospecting, soil sampling, geological mapping, three diamond drill holes, totalling 147 metes, and 147 metres of trenching on the area. During 2012 through 2018, the area was prospected by B. Doyle. Later in 2018, Walcott Resources Ltd. completed a program of ground geophysical surveys on the area as the Cobalt Hill property.
