The Sun occurrence is located on the southwest portion of the Klastline Plateau. The area has recently been mapped on a regional scale as Upper Triassic Stuhini Group sediments intruded by dikes, sills, plugs and plutons of Early Jurassic age (Open File 1997-3). The Sun claims were owned and investigated by Great Plains Development Company Ltd. in 1976. An unknown amount of rock sampling and geological work was reported done on the claim covering the showing. No further work is reported on this showing to date (October, 1998).

One small occurrence of copper mineralization was found which consists of a pod of malachite up to 60 centimetres in diameter with a length up to 6.1 metres, and soft blue-black veinlets of chalcocite that occur in a band of tuff. Mineralization is thought to have resulted from fluids migrating along planes of weakness parallel to bedding. Two grab samples were taken, the first containing 12.13 per cent copper and 20.57 grams per tonne silver, and the second containing 15.65 per cent copper and 35.66 grams per tonne silver (Assessment Report 6303).