The Boo (Gert) occurrence is located west of Stump Lake, approximately 2 kilometres northwest of its southern end.

Regionally, the area is situated within the folded, fault-bounded eastern belt of the Upper Triassic Nicola Group and underlain by volcanics and sediments that have undergone low-grade greenschist facies metamorphism. To the west, Paleocene and Late Triassic to Early Triassic granodioritic intrusive rocks are exposed. The area lies on the west limb of a regional north-trending syncline, the axis of which passes through Stump Lake.

Locally, the area is underlain by massive, pyritic volcanic breccia, amygdaloidal andesite flows, tuff, interbedded sandstone and shale, and a highly sheared, serpentine-rich ultramafic with 1 per cent disseminated magnetite throughout. Narrow, post-mineral(?) diabase dikes intrude this sequence.

At the Boo occurrence, a quartz-carbonate-sericite–altered tuffaceous dacite hosts minor pyrite and traces of azurite and chrysocolla or brochantite. Celadonite, a nickel-bearing iron silicate, is also reported. Other reports on the Gert claims describe a shear zone hosting bornite in the area.

In 1971, a select sample from the no. 1 trench assayed 0.28 per cent copper, 0.06 per cent lead, 0.06 per cent nickel and 13.7 grams per tonne silver, whereas a chip sample of the trench yielded 0.08 per cent copper and 0.07 per cent nickel over 10.5 metres (Property File - A.E. Nevin [1971-08-14]: Letters Re: Boo Mineral Claims).

In 1968, Cyprus Exploration Corp. examined the area as the Gert claims. In 1971, the area was examined as the Boo claims by Maiko Resources Ltd.