The Arrowsmith occurrence is located on McBey Creek, a tributary of Lockwood Creek.

The area is underlain by massive and locally porphyritic andesite of the Upper Triassic Karmutsen Formation (Vancouver Group) near the fault contact with an extensive body of diorite 2.4 kilometres to the east. The andesite is cut by several shear zones up to 6 metres in width.

Mineralization consists of chalcopyrite, bornite, pyrrhotite and pyrite hosted in quartz veins and veinlets up to 60 centimetres wide in a shear zone. The veinlets strike 210 degrees. Some minor fault offsets of the veins are evident. An altered limestone bed 4.5 to 6 metres wide occurs locally in the andesite and carries minor disseminated chalcopyrite.

A grab sample across 1.2 metres from a lower adit assayed 9.05 per cent copper, 27.4 grams per tonne silver and 6.8 grams per tonne gold (Property File - Report by H. Laanela).

The Arrowsmith claims were staked in 1985 and 1986 by Blue Sun Resources Corporation. From 1987 to 1991, Blue Sun completed various programs of prospecting, geological mapping and geochemical sampling. In 2011, New Skoshoni Ventures completed a reconnaissance program consisting of prospecting and rock sampling. Past work included two adits, some crosscutting and a winze developed along the shear zone. One adit is at 454 metres elevation and the second is at 480 metres elevation. Surface work consisted of stripping and pits.