The Lasca 3 showing is located near the headwaters of Lasca Creek, 15 kilometres east of Nelson. The area is underlain by porphyritic hornblende granodiorite of the Nelson batholith of the Late to Middle Jurassic Nelson Intrusions. Small rafts and roof pendants consisting of Lower Jurassic Ymir Group and Lower Cambrian metamorphosed sediments occur in the batholith.

The Lasca number 3 vein is 0.5 to 0.75 metres wide and is enclosed in a long, northerly trending raft of metasediments. The vein strikes 360 degrees and dips 40 to 60 degrees west. Geochemistry indicates some minor arsenic but base and precious metal values are low.

A sample containing pyrite, pyrrhotite and hematite from the probable extension of the number 3 vein in an adit assayed 2.0 per cent lead, 0.22 per cent zinc, 37.4 grams per tonne silver and trace gold (Assessment 12940).