The Buck 87 showing is located about 700 metres east of Rufus Creek and 350 metres north of the Stewart highway, approximately 25 kilometres northeast of Stewart.

The area is underlain by subhorizontal to gently dipping Lower Jurassic rocks of the Unuk River Formation (Hazelton Group). These rocks comprise mainly andesite tuffs and breccias (Bulletin 63).

The showing consists of an outcrop of silicified, porphyritic andesite containing disseminated pyrite and chalcopyrite. A grab sample assayed 2.9 grams per tonne gold, 3.4 grams per tonne silver, 0.01 per cent copper, 0.02 per cent lead and 0.27 per cent zinc (Assessment Report 12651).

A grab sample was taken from an argillite band mineralized with disseminated pyrite, about 150 metres west-southwest of the showing. The sample assayed 0.82 per cent zinc, 0.14 per cent lead, 3.1 grams per tonne silver and 0.2 gram per tonne gold (Assessment Report 12651).

In 2007, a grab sample from a rusty sericite altered andesite with minor pyrite located about 280 metres south near the river assayed 17.3 grams per tonne silver and 0.09 per cent zinc (Assessment Report 29358).

In 1983, Kingdom Resources Ltd. carried out reconnaissance soil and rock sampling in the southern part of the Buck 87 claim. This work outlined coincident copper-lead-zinc soil anomalies. Prospecting in 1984 located weakly mineralized outcrops near the anomalies. During 2005 through 2010, Auramex completed programs of prospecting, geological mapping, geochemical sampling and airborne geophysical surveys on the area as the Bear River-Surprise Creek property.