This occurrence gives a strong, approximately circular aeromagnetic signature some 5 km in diameter. It has been extensively drilled, which has indicated the intrusion to be principally carbonatite consisting of varying amounts of calcite, mica, amphibole, magnetite, apatite and accessory perovskite, fluorite, pyrochlore and sulphides. Pure apatite rocks and bands of magnetite rock 0.5 m in thickness are present. The granite gneisses around the intrusion are fenitized.
FERGUSON, S.A. 1971. Columbium (niobium) deposits of Ontario. Mineral Resources Circular, Ontario Department of Mines and Northern Affairs, 14: 1-58.
HEINRICH, E.W. 1966. The geology of carbonatites. Rand McNally, Chicago. 608 pp.