Geophysics of the Levack Gneiss Cartier Batholith Complex
Abstract
LITHOPROBE high resolution seismic reflection data from the Abitibi-Grenville transect (Milkereit et al., 1992) combined with gravity, aeromagnetic, airborne radiotnetric, and airborne VLF-KM data and field mapping (Hearst et al., 1992: Fueten et al., 1992) have been used to study the Levack Gneiss Cartier Batholith Complex in the Sudbury region of Ontario. The data acquired suggest that the Archean gneisses and/or greenstone belts of the Superior Province to the immediate north and west of the Sudbury Structure are dipping towards the south under the Sudbury Basin. Geologic field mapping has suggested the presence of previously unmapped ductile shear zones, increasing foliations towards the Sudbury Structure, and possible revisions to the current "mapped" geologic boundaries. Supporting evidence for these ductile shear zones and geologic boundary revisions has been derived from the analysis of the geophysical datasets, providing a more detailed and complex structure for the Levack Gneiss Cartier Batholith Complex.