The Lasca 1 showing is located near the headwaters of Lasca Creek, 15 kilometres east of Nelson. Several trenches and adits have been developed on this showing.

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 1 vein is hosted in micaceous quartzites and paragneiss. The vein, 1 to 1.5 metres wide, strikes 146 to 150 degrees, dips 40 to 53 degrees north and has been traced for 390 metres. Mineralization consists of pyrite, pyrrhotite, some galena and rare sphalerite within a quartz gangue. Base and precious metal values from sampling are very low.