At the Ross 1 showing, diamond-drill hole 76-3 drilled to 600 metres, intersected black argillites and quartzites of the Helikian Lower Aldridge Formation (Purcell Supergroup) (Assessment Report 5900). Disseminated pyrite and pyrrhotite occurs along bedding surfaces. Minor quartz veins cut the strata and host some chalcopyrite and sphalerite mineralization.

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 (Assessment Report 23012). In 2017, an NI43-101 technical report for Purcell Basin Minerals Inc. defined exploration targets peripheral to the copper ore body on the Bull River Mine property (Assessment Report 37195). This work was facilitated by the processing of Dighem airborne EM (AEM) data acquired from 1991-1997 surveys. Processing and interpretation of the historic Dighem data identified several target areas of coincident EM and magnetic features. Figures 7, 8, and 9 show magnetic and resistivity coverage from the Bull River mine area southeast to the Elko community area (Assessment Report 37195).

Refer to Bull River (082GNW002) for details of the greater Bull River property which contained the Ross 1 occurrence and 24 documented MINFILE occurrences (as of October 2022).