The Western Silverstream occurrence is located on the north side of Marshall Creek, approximately 1.5 kilometres northwest of its junction with Brett Creek.

The area is underlain by a sequence of imbricated chert, intermediate volcanics, gabbro, limestone, blueschist and clastic rocks ranging in age from Permian to Jurassic of the Bridge River Complex, which are intruded by felsic dikes and numerous dikes of serpentinite and their altered equivalents.

Locally, there is a steeply dipping, southeast trending, mineralized shear zone, ranging from 1 to 4 metres wide and at least 45 metres in strike length.

The area was originally staked in 1987 and preliminary exploration programs, consisting of geological mapping, soil and rock sampling, ground geophysical surveys and trenching were completed in 1996. This work identified two anomalous zones, known as the Western and Southeastern zones. From 2005 to 2007, Gray Rock Resources completed programs of prospecting and seven diamond drill holes, totalling 1361.05 metres, on the Silver Stream property. Two of the holes, totalling 246.57 metres, were completed on the Western occurrence.

In 1995, sampling of the shear zone assayed: 8.9 grams per tonne gold over 2.8 metres, 5.8 grams per tonne gold over 1.2 metres, 9.6 grams per tonne gold over 1.0 metre, and 28.4 and 48.0 grams per tonne from grab samples along strike (Assessment Report 24348). In 2005, DDH SS 05-01 assayed 7.3 grams per tonne gold over 2 metres and 5.41 grams per tonne gold over 9.14 metres within two separate intervals of chert breccia (Assessment Report 28502).