The JK showing is located on the western slopes of a prominent ridge separating Lyle and Rossiter creeks. The Highland Surprise occurrence (082KSW037) lies 1.5 kilometres to the northwest. The showing is about 24 kilometres northwest of Kaslo, British Columbia.

Hostrocks of the JK showing include andesite, andesitic tuffs, greenstone and serpentinized peridotite of the Permian Kaslo Group. Localized alteration of the greenstone along the serpentinized peridotite contact has produced chlorite biotite schist and talc carbonate schist. For the more detailed description of the area geology refer to the Highland Surprise occurrence.

Copper mineralization occurs in chlorite biotite schist and consists of weak and sporadic chalcopyrite. Copper and nickel mineralization within the serpentinized peridotite are also reported, although pyrrhotite and pyrite are the only reported sulphides. Elsewhere on the JK claims, along the northeast contact between greenstone and serpentinite, quartz veins contain noticeable amounts of galena, tetrahedrite, chalcopyrite and sphalerite.

Exploration work on this showing to date has not revealed economic concentrations of copper and nickel mineralization in the serpentinized peridotite. Mineralized quartz veins have not received much attention during exploration.