The Tchentlo occurrence is situated west of the north end of Tchentlo Lake, approximately 52 kilometres southeast of Takla Landing. The area was explored for its mercury potential during the Second World War.

The area west of Tchentlo Lake is underlain by sediments assigned to the Carbonaceous to Jurassic Cache Creek Complex, west of the north-northwesterly striking Pinchi fault zone. Blue-grey limestone predominates in the area, although argillite does outcrop on small knolls flanking the lake and was exposed, with greywacke, in trenches.

Several large boulders and small pieces of carbonatized serpentine hosting cinnabar were reported in the area in the early 1940s. Stripping failed to located the bedrock source of this mineralization.

Altered limestone has been exposed in a roadcut approximately 3 kilometres west of the lake. A sample taken of what is described only as a "quartz-carbonate rock" assayed 0.00011 per cent mercury. Another sample assayed 0.140 grams per tonne gold and 0.0405 per cent arsenic (Assessment Report 11882, Figure 2).