The Llama occurrence is underlain by a small, northwest trending and moderate southwest dipping roof pendant of Lower Cretaceous Gambier Group volcano-sedimentary rocks surrounded by granodiorite of the Cenozoic-Mesozoic Coast Plutonic Complex. Mixed siliceous siltstones and felsic tuff have undergone strong metamorphism obliterating most primary textures and giving the rocks a quartzitic to gneissic appearance. The rocks are dominantly quartzose and have been silicified.

Mineralization consists of finely laminated pyrite hosted by the metasedimentary rocks. The pyrite occurs with biotite as streaks and veinlets usually parallel to bedding within an oxidized (gossan) zone. At the showing, a 20 metre long by 0.2 metre wide vein of massive pyrite-chalcopyrite-biotite occurs parallel to bedding and thins outs to a 1 to 2 centimetre thick band of weakly pyritic siltstone to the northwest but remains open to the southeast. The vein is located in non-pyritic siltstone beyond the southwest limit of the gossan zone. A chip sample of the vein assayed 3.2 per cent copper, 6.92 grams per tonne gold and 10.28 grams per tonne silver (Assessment Report 11729).