Migration of wide-angle seismic reflection data from the Grenville front in Lake Huron
Abstract
Under the auspices of the Great Lakes International Multidisciplinary Program on Crustal Evolution (GLIMPCE), coincident steep- and wide-angle seismic reflection data sets were acquired in Lake Huron. The wide-angle data were recorded at stationary onshore receivers during the shooting and recording of the conventional marine steep-angle survey. To extract information from the wide-angle data, a variety of processing techniques including automatic trace editing, amplitude balancing, F-K filtering, static corrections, and predictive deconvolution were applied to the wide-aperture common-receiver gather before migration. The application of a slowness-weighted depth migration algorithm, which was first tested on synthetic data and which included a slowness filter, resulted in an image of the Grenville Front tectonic zone (GFTZ) remarkably similar to that observed in the multichannel steep-angle section. The migrated wide-angle data suggest that prominent bands of east dipping seismic reflections observed across the GFTZ extend unattenuated to depths of at least 45 km.
- Publication:
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Journal of Geophysical Research
- Pub Date:
- July 1990
- Bibcode:
- 1990JGR....9510987.
- Keywords:
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- Seismology: Body wave propagation;
- Information Related to Geographic Region: North America