The Upper Bronson showing area is underlain by a sequence of folded and faulted upper Triassic andesitic volcanic and clastic sedimentary rock units of the Stuhini Group. The sequences of clastic layered rocks consist of volcanic wackes, andesitic flows, and argillite interbeds.

In 1988, Winslow Gold Corp collected 1895 soil and 582 samples from two grid (Bronson and Ridge) areas. A 112 kilometre Aerodat airborne VLF-EM and Magnetometer survey was completed over the property. A subsequent fifteen hole (3358 metres) drill program was carried out to test the Upper Bronson, Ridge (104B 299) and Handel (104B 205) prospects. Results were not published.

In 1997, exploration by Winslow Gold Corp continued and a total of 832 soil samples were collected and analyzed (Assessment Report 25187). Coincident anomalous gold, copper, arsenic and lead with slightly elevated molybdenum defined the Upper Bronson soil anomaly. The Upper Bronson anomaly was well investigated by intense prospecting and trenching performed. The Upper Bronson zone was defined by a 140 metre long between 120 and 930 parts per billion gold. The zone was initially trenched, with 3 samples yielding chlorite alteration and insignificant gold values. Further prospecting showed the large dimension of the anomaly was attributable to downslope dispersion from a 10 grams per tonne gold-bearing narrow chlorite-pyrite mineralised shear vein outcropping directly upslope from the sample locations.