The Berg 87 occurrence is located in the northern headwaters of the northern arm of the Goodspeed River, approximately 4.5 kilometres southeast of Knob Hill.

The area is underlain by Lower Jurassic Bonanza Group andesite to rhyodacite volcanics intruded by diorite of the Jurassic Island Plutonic Suite. The volcanics strike northwest and dip to the southwest. A pyrite-clay-silica alteration zone extends the length of the volcanic belt.

Locally, three zones (Berg 87, Berg 91 and B 2) of disseminated pyrite and molybdenite mineralization are hosted within strongly altered and silicified Bonanza Group volcanics (possibly rhyolite). The Berg 91 and B 2 zones are located approximately 900 metres to the southwest and 2.4 kilometres to the south, respectively, of the Berg 87 zone.

In 1989, a rock sample (109728) taken downslope of the Berg 87 zone assayed 1.02 per cent zinc, 0.187 per cent copper and 3.1 gram per tonne silver over 0.3 metre of a 1.5-metre mafic dike hosting 5 to 7 per cent pyrite in an andesite host (Assessment Report 19190).

During 1968 through 1970, Continental Cinch Mines Ltd. completed programs of prospecting, soil sampling, geological mapping and a 16.0 line-kilometre ground magnetic survey on the area as the Berg 1-178 and B 1-12 claims. In 1973, Pechiney Development Ltd. completed a 12.0 line-kilometre induced polarization survey on the area as the Ben-Hur claims. The following year, eight diamond drill holes, totalling 1029.0 metres, were completed on the Berg 91 area. In 1989, Mishibishu Gold Corp. completed a program of geological mapping and geochemical sampling on the area as the Nahwitti 1-4 claims.