The Tomb 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 Tomb zone has massive sulphide veins trending northeast dipping moderately to the northwest, varying up to 10 centimetres. These massive veins are in the similar orientation as the Trek fault and may be tension joints where hydrothermal activity could occur and was deposited. Grab samples taken from these veins yield 0.005 per cent copper and 0.25 grams per tonne gold or sample E594081 and 0.002 per cent copper and 0.40 gram per tonne gold for sample E594082 (Assessment Report 32866).

Alteration surrounding the veins is quartz-sercite-pyrite (QSP) with disseminated chalcopyrite, pyrite and bornite. The rock is highly fractured with heavy iron oxide staining. Assay from grab samples show 0.27 per cent copper and 0.08 gram per tonne gold from sample E594083 (Assessment Report 32866).

In 2014, Romios Gold Resources Inc. collected 22 chip samples across four chip lines as well as two individual chip samples at the Tomb Zone. Although traces of disseminated fine to medium-grained chalcopyrite and malachite stained fracture planes were observed in numerous samples, metal concentration demonstrated only anomalous copper and gold values in a few samples. The best copper and gold values came from sample H234757 collected from a fault zone containing 2.59 per cent copper and sample H234819 collected from a bluff 40 metres above the fault zone in a medium-grained andesite that yielded 0.125 gram per tonne gold (Assessment Report 31505).

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