The Hecla-Kilmer complex is completely covered by muskeg and glacial deposits, but aeromagnetic data indicate a complex of 18 km2. Drilling has proved the presence of essexite, ijolite, pyroxenite and nepheline syenite.
BELL, K. and BLENKINSOP, J. 1980. Grant 42 ages and initial 87Sr-86Sr ratios from alkalic complexes of Ontario. Miscellaneous Paper, Ontario Geological Survey, 93: 16-23.
SAGE, R.P. 1977. Carbonatite-alkalic complexes. Miscellaneous Paper, Ontario Geological Survey, 75: 69-79.
R.P. Sage personal communication, 1983.