The Jane mercury showing area is underlain mainly by the Upper Triassic Nicola Group comprising massive to plagioclase porphyritic andesite, tuff, agglomerate, argillite, and basaltic flows with picritic phases. The Nicola rocks trend northwesterly with moderate to steep northeast or southwest dips and are cut by major northwest trending faults.
Several large carbonate (ankerite)-silica alteration zones extend from the shore of Kamloops Lake northward and northwestard. The buff to yellow weathering carbonate zones contain varying amounts of stockworks and veins of dolomite, ankerite and calcite with one or more stages of silica (chalcedonic) veining and varying amounts of sericite, kaolinite and pyrite. Ten alteration zones have been recognized which vary from 100 metres long by 10 metres wide up to 1500 metres long by 150 metres wide. Most are poorly exposed and have been traced mainly in rubble outcrop.
The Jane showing occurs in a silicified and ankerite altered zone in andesitic volcanics where stringers of dolomite carry thin films of cinnabar; small masses of cinnabar also occur in the silicified rock.
The initial claims of the Jane group were staked in about 1940 when only limited prospecting work took place. The workings as observed in the early 1940s comprised three old and largely sloughed in opencuts. The next period of exploration was in 1982, when heavy mineral sampling conducted by Canadian Nickel Company Ltd. yielded anomalous mercury and gold and resulted in the staking of the Kam claim group. Exploration personnel from Canadian Nickel became aware that the numerous hydrothermal mercury occurrences in the area could be a manifestation of zoning in epithermal gold deposits and exploration was pursued intensively from 1982-85. This work mainly focused on the Sabiston Flats showing (092INE059) but also covered the Jane showing where a rock sample from some trenches in 1984 yielded 3800 parts per billion mercury (Assessment Report 13618). See Sabiston Flats occurrence for a complete work history.
