Several coal seams occur in the Konigus Creek area in the Skeena Mountains, 35 kilometres southwest of the significant anthracite coal prospects in the Mount Klappan area of the Groundhog Coalfield (104H 020, 21 and 22), about 125 kilometres north-northeast of the community of Stewart.
Seams were identified in 1983 during regional reconnaissance and coal prospecting of lesser explored areas of the Bowser Basin by Esso Resources Canada. In 1985, Esso extended their application area from Sweeny Creek to the north to include areas along Konigus Creek. Mapping at 1:10,000-scale was conducted and trenches were dug and sampled in the coal seam they discovered. Coal Assessment Report 714 recommended no further work in the Sweeny and Konigus creeks areas, citing complex structure, abrupt facies changes and lateral discontinuity, and the lack of economic coal seams.
Coal at Konigus Creek is semi-anthracite to anthracite in rank (Coal Assessment Report 789). The thickest seam found by the Esso exploration program was 1.57 metres thick (Coal Assessment Report 714).
In 1991, Dawson and Ryan (Geological Survey of Canada Open File 2555) mapped and sampled four trenches in coal showings in Konigus Creek. At those locations seam thicknesses range from 0.2 to 1.1 metres; vitrinite reflectance values (RoMax) range from 2.30 to 2.84 per cent (semi-anthracite).
The strata in the Konigus Creek area belong to the Bowser Lake Group. Esso Resources (Coal Assessment Reports 714 and 789) assigned the coal-bearing unit to the Lower Cretaceous McEvoy Formation of Bustin and Moffat (Canadian Society of Petroleum Geologists Bulletin 1983). The McEvoy Formation overlies the Upper Jurassic Currier Formation, the major coal-bearing formation of the Groundhog coalfield. This stratigraphic placement of the Konigus Creek rocks in the McEvoy Formation was based on a rank study of coals in the Currier and McEvoy formations by Bustin (1983), which observed vitrinite reflectance values of 1.7 to 3.5 per cent RoMax in McEvoy Formation coals, and values of 3.0 to 5.8 in Currier Formation coals. Samples collected by the Esso project yielded reflectance values in the range 2.56 to 3.24 per cent RoMax. Evenchick and Thorkelson (Geological Survey of Canada Bulletin 577) assigned the rocks in Konigus Creek area to the Late Jurassic Skelhorne Assemblage. This assemblage underlies the Groundhog-Gunanoot Assemblage, the main coal-bearing unit of the Groundhog coalfield. See Mount Klappan-Lost Fox (104H 021), located 38 kilometres northeast, for further discussion of the history of formation nomenclature of the Bowser Lake Group.