Imaging of the lithosphere using seismic reflection data from central Alberta

High quality crustal-scale seismic reflection data acquired by Lithoprobe in 1992, including two PRAISE'1994 seismic lines recorded also by Lithoprobe, have been reprocessed and interpreted in this thesis to image the structure of the lithosphere across central Alberta.;Starting with the stacked seismic data, phase-shift migration and coherency filtering was applied in the reprocessing with Second White Speckled shale (2WS)--a consistent stratigraphic marker flattened and shifted in a fixed two-way traveltime to remove errors in static corrections and the effect of the different processing datum elevations for individual seismic lines. Using the 2WS as a datum level tended to diffuse the multiples which was present after the data was migrated. This produced a section in which primary reflected energy dominates. As phase-shift migration can handle the dips of up to 90;A second method using depth migration, accurate for dips of up to 70;The seismic data was compared to the gravity and magnetic potential field during interpretation. Some effects of Precambrian basement reactivation were discovered. The Precambrian event shows regional crustal thrust imbrication. The depth crustal depth varied from 36 km to 43 km in central Alberta.