The East zone on the Trek Property is underlain by Upper Triassic Stuhini Group rocks, which have been intruded by Late Triassic monzonitic intrusions, Eocene granitic dikes, sills and stocks of the Major Hart Plutonic Suite, Paleocene to Eocene granodioritic plutons and Miocene basaltic and rhyolitic dikes.

The most significant quartz vein system on the Trek property as of 1990 was the East zone. It comprises several parallel quartz-pyrite veins with local concentrations of sphalerite, galena and chalcopyrite, hosted within discrete envelopes of intensely silicified and sericitized volcanic conglomerate. Select sample 245510, taken from a galena-sphalerite-chalcopyrite rich section of one of these veins, assayed 1.51 grams per tonne gold and 809 grams per tonne silver with 30 per cent combined copper-lead-zinc (Assessment Report 20956).

The East Zone veins, which are well exposed in two forks of a steep side-creek to Trek Creek, are very continuous and regular in width and orientation, with a true width of 80 centimetres for the widest and best mineralized one. These veins, and their associated 0.5 to 1.5 metre silica-sericite alteration haloes, trend east-west and dip steeply to the north. Similar alteration and veining outcrop in the next side-creek to the south, approximately 250 metres along strike to the west-southwest, suggesting that they are an extension of the East Zone veins.

In 2014, Romios Gold collected rock samples from their Trek property, including Tundra (104G 400), East (104G 402), Tomb (104G 404), Lower North (104G 406) and zones. The East Zone was investigated as a possible source/extension for the copper mineralization that was found at the Tomb Zone. Three samples were taken for analysis, but no significant mineralization was found.

Refer to North zone (104G 022) for details of the Trek property work history, of which the East showing is part of.