Tectonic domains for the basement of the Western Canada Sedimentary Basin, based largely on interpretation of potential field data and U-Pb geochronology of selected samples of basement (modified from Hoffman, 1989).
Aeromagnetic anomaly map of Western Canada. Compiled by the Geophysics Division, Geological Survey of Canada.
Bouguer gravity anomaly map of Western Canada. Compiled by the Geophysics Division, Geological Survey of Canada.
Horizontal gravity gradient map of Western Canada. Compiled by the Geophysics Division, Geological Survey of Canada.
Filtered isostatic residual gravity anomalies for wavelengths 400 to 700 km. Approximate axis of the Peace River Arch is from Stephenson et al. (1989).
Filtered isostatic residual gravity anomalies for wavelengths 700 to 1200 km. Approximate locations of the axes of the Peace River Arch (from Stephenson et al., 1989) and the Severn Arch (from Porter et al., 1982) are indicated.
