The OK shear zone crosscuts argillites and quartzites of the Helikian Aldridge Formation (Purcell Supergroup). The vein/shear strikes east-west, has an apparent dip that is near vertical towards the south and is twelve metres wide at its widest exposure. Veins, irregular blebs and disseminations of galena are distributed throughout the altered and sheared argillites. An assay from 1997 graded 42.8 per cent lead, 686 grams per tonne silver and 0.34 gram per tonne gold with minor copper and zinc values (Exploration Report for Gallowai Metal Mining Corporation, September 22, 1997, Property File Document (PFD 676699). A parallel vein 100 metre upslope (about 50 metres on plan to the north) also occurs. These structures are interpreted as comprising a major hinge fault zone.

The 1982 airborne electromagnetic and magnetic survey carried out over large parts of the Bull River property on behalf of owner/operator R.H. Stanfield identified eight target areas for sulphide mineralization (Assessment Report 10570). The Dogwood 11 claim that contains the occurrence was part of the surveyed area.

In 1992 a helicopter borne DIGHEM survey over the Balsam, Cedar and Dogwood claims of R. H. Stanfield (Bul River Mineral Corporation Ltd.) was completed but appears to be just to the southwest of the Ross 2 occurrence (082FSW053) (Assessment Report 23012). In 2017, an NI43-101 technical report for Purcell Basin Minerals Inc. processed and published DIGHEM airborne survey data from 1991-1997 surveys (Assessment Report 37195).

Refer to Bull River (082GNW002) for details of the greater Bull River property which contained the OK occurrence and 25 other MINFILE documented mineral occurrences (as of October 2022).