The Chopaka showing is located at about 680 metres elevation on the southern slopes of Richter Mountain, north of Highway 3. The Canada-United States of America boundary is 4.0 kilometres south of Richter Mountain. The occurrence is located on the Chopaka claim.

Previous work on the property includes a five metre adit driven between 1900 and 1920 (see also Border, 082ESW251). To the south, in the Nighthawk area of Washington State, exploration has been carried out on many properties since the 1880s. During 1985-86, Ascent Resources Ltd. located the old adit and carried out geochemical, magnetic and VLF-EM surveys. In 1989, a quartz vein was located during property exploration by M.J. Harris. From 1989 to 1991, M.J. Harris established 18.5 kilometres of grid, conducted a ground magnetometer survey over 7 kilometres, and took 528 soil samples and 104 rock samples for analysis.

The Chopaka showing is hosted by granite and granodiorite of the Similkameen intrusion, bordered by syenite of the Kruger pluton. The Kruger pluton forms an east-west trending band 1.3 to 2.0 kilometres long. Central phases of the Similkameen intrusion consist of quartz monzonite and granodiorite phases. Monzonitic phases crosscut both central phases and outer syenite. Roof pendants of metasediments and metavolcanics of the Carboniferous to Permian Kobau Group occur to the immediate east.

The 10-centimetre wide quartz vein is mineralized with galena, pyrite and sphalerite. The vein strikes 072 degrees and dips vertically and is exposed over 2 metres. Chlorite and hematite alteration are present. A grab sample from this vein yielded 0.46 gram per tonne gold and 8.0 grams per tonne silver (Assessment Report 20172).