The Mare occurrence is located approximately 5 kilometres north of Chromite Creek, about 126 kilometres north of the community of Dease Lake.

The occurrence area is underlain by plagioclase and/or pyroxene porphyritic andesitic flows and pyroclastic rocks in Divison III of the Tournaisian (lower Early Mississippian)-Permian(?) Sylvester allochthon (Fieldwork 1987).

The Mare showing consists of numerous small gossanous exposures of quartz, carbonate, clay, pyrite and chalcopyrite alteration which occur within a broader zone of bleached, carbonate-altered volcanics. In 1983, these zones were extensively rock chip sampled by Falconbridge Limited and assayed up to 201.5 grams per tonne silver (sample MM024) and 2.89 grams per tonne gold (sample MB011) (Assessment Report 11355).

The Mare group of claims was staked by Canadian Superior Exploration Ltd. in September 1981 after regional reconnaissance had located anomalous gold and silver values in locally derived angular float. The property was acquired by Falconbridge Limited in September 1982 and a rock chip sampling (135 samples) and mapping program of the main accessible gossans was carried out in late August/early September, 1983. Significant, but lower grade gold values were found by Falconbridge, together with one high silver value, before low cloud and snow precluded further work. On the basis of these results, Falconbridge contracted Access Geological Services to extend the reconnaissance in 1984 onto the untested main walls of the cirque and a total of 167 samples were taken and geological mapping completed.