The On occurrence is located south west of Kayouk Creek, approximately 2 kilometres west of the creek mouth.

The Kyoquot Peninsula is underlain by sediments and volcanics of the Lower Jurassic Bonanza Group, comprised of a lower sequence of calcareous sediments overlain by intermediate flows and intermediate to felsic pyroclastics. Small wedges of Upper Triassic Vancouver Group calcareous sediments of the Parson Bay Formation are in fault contact with the younger Bonanza Group rocks. A medium-grained syeno-diorite stock occurs 7.0 kilometres north, at the head of Kashutl Inlet. A quartz porphyry stock is reported at Malskope River, 5.0 kilometres northwest (Assessment Report 3008, page 4).

The On occurrence consists of extensive skarn mineralization with minor disseminated sphalerite. An area of silicification is reported 800 metres west of the skarn (Assessment Report 11664, Figure 5 and 15521, page 7).

Diamond drilling in 1982 intersected quartz-latite, skarned calcareous sediments and diorite. Gold values up to 0.585 grams per tonne were encountered (Assessment Report 11664, page 44).

In 1970, the Kyuquot Syndicate completed a program of reconnaissance silt and soil sampling on the area as the On claims. In 1980, the area was prospected by J.C. Stephen Explorations. In 1982, BP Minerals completed a program of geological mapping, rock sampling and 2 diamond drill holes, totalling 209.8 metres. During 1986 through 1989, Taywin Resources completed programs of geological mapping and geochemical sampling on the area as the Sin 1-7 claims.