The Arnold showing is located on the west side of Erie Creek, about 13 kilometres west of Ymir. This showing, along with the Copper King (082FSW213), the Ben Hassen (082FSW300) and the Hattie (082FSW226) showings, occur on the Erie Creek property.

The area is underlain by sediments of the Archibald Formation and minor volcanics of the Elise Formation, both of the Lower Jurassic Rossland Group. The Rossland Group rocks are intruded by granodiorite and quartz monzonite of the Middle to Late Jurassic Nelson Intrusions, locally known as the Erie stock. The Erie stock is comprised of a light grey quartz monzonite with associated aplitic and feldspar porphyry dykes. Biotite hornfels is apparently a contact metamorphic effect related to both the Nelson batholith and the Erie Creek dyke swarm. Hornfels is mainly developed in argillite and siltstone. Chlorite occurs mainly on fractures and in shear veins in augite andesite and hornfels.

Mineralization on the property occurs roughly in four concentric zones. An inner quartz-molybdenum plus scheelite zone followed by a chalcopyrite zone, a pyrite-pyrrhotite zone and an outer sphalerite- galena zone. The inner zone is approximately 600 metres in diameter and is centered on the east side of Erie Creek (Hattie). The host rocks are quartz monzonite dykes, stocks and white rhyolite. The chalcopyrite zone occurs over an area of 1.5 to 2 kilometres and occurs in quartz and sulphide veinlets as fracture coatings and in shear veins with pyrite, pyrrhotite and minor amounts of scheelite. The best copper values obtained, up to 1.3 per cent, were from vein and dump samples mainly from old workings on the west side of Erie Creek (Drum Lummon, Cooper King, Dora, Homestake). Pyrite and pyrrhotite, in an area about 1.5 by 2.5 kilometres, occur finely disseminated and as fracture coatings. Sphalerite and galena with some gold occur in shear veins beyond the inner zone, such as the Arnold and Ben Hassen showings.

Cominco drilled several holes in this area in 1926-1927. Old reports document galena, pyrite, sphalerite and chalcopyrite in a poorly defined "zone" of altered volcanics. In 1987, sphalerite and galena were found in shear veins on the Arnold Reverted Crown Grant. Two samples from a quartz vein in an old adit at elevation 1402 metres assayed 41.4 grams per tonne silver, 0.049 grams per tonne gold and 67.3 grams per tonne silver, 0.032 grams per tonne gold, respectively (Assessment Report 15510).

The mineralization is believed to be part of a zoned porphyry type deposit which has a central quartz vein stockwork zone contain- ing molybdenum-copper-tungsten mineralization and a peripheral zone with veins containing copper-lead-zinc-silver mineralization. This showing is interpreted as occurring in the outer zone.

The Arnold claim is located at the 1371.6 metres elevation on the west side of Erie Creek some 22.5 kilometres south-southwest of Nelson. An early settlement about 3.2 kilometres to the south was known as Craigtown or Green City.

Workings on the Arnold claim in 1896 included a 7.6 metre shaft and 16 metres drift. The claim was Crown-granted (Lot 4079) toW.A. Arnold in 1902.

The Arnold and adjacent Gracie R, Rosebud Fr. and Arnold Fr. claims were owned from about 1920 by W. Connolly. The Consolidated Mining and Smelting Company of Canada Limited optioned the property and carried out diamond drilling in 1926-27 on the Arnold and Gracie R claims, and on the St. Louis (Lot 12176) about 1.6 kilometres to the south. The drilling indicated wide zones of mineralization but failed to locate commercial ore.