The Claude Shoulder vein occurs in an area of Devonian to Permian Stikine Assemblage rock. This package is intruded to the immediate east by the Late Triassic Seraphim Mountain Pluton, consisting of quartz monzonitic rock, and to the northeast by the Early Jurassic Zippa Mountain Plutonic Complex, which ranges compositionally from leuco-syenite to mafic syenite and pyroxenite.

In 1989, Corona Corporation prospected the MAC 1, 2, ZIP 1 and 2 claims (of the Inhini property) and collected 24 heavy mineral, 19 silt and 163 rock samples (Assessment Reports 19969). In 1990, Link Resources Inc. carried out a 700-kilometre airborne magnetic and EM survey over the entire Inhini Property (Assessment Report 20972).

At the 1020 metre level on the southeast shoulder of Claude Mountain, a narrow quartz vein in sheared phyllite-argillite was located. The shear vein is 20 centimetres wide and intermittently exposed over 30 metres. The vein carries disseminated pyrite, galena, sphalerite and tetrahedrite. Six grab samples (samples 82242 to 82247) taken along this vein assayed up to 4.66 grams per tonne gold, 2820.37 grams per tonne silver and 4.12 per cent lead (Assessment Report 19969). Mineralization in this vein is reported to be discontinuous.