| Title | Crustal structure in the Gulf of St. Lawrence region, eastern Canada: preliminary results from receiver function analysis |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Kao, H ; Shan, S
-J; Cassidy, J F; Dehler, S A |
| Source | Geological Survey of Canada, Open File 7456, 2014, 48 pages, https://doi.org/10.4095/293724  Open Access |
| Image |  |
| Year | 2014 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| File format | pdf |
| Province | Eastern offshore region |
| Area | Gulf of St. Lawrence |
| Lat/Long WENS | -68.0000 -58.0000 50.5000 43.5000 |
| Subjects | tectonics; marine geology; structural geology; crustal structure; crustal studies; tectonic environments; tectonic interpretations; tectonic evolution; oceanic crust; structural interpretations;
structural analyses; remote sensing; LITHOPROBE; Anticosti Basin; Magdalen Basin; Orpheus Basin; Sydney Basin |
| Illustrations | location maps; tables; photographs; profiles |
| Program | Public Safety Geoscience Eastern Canada Geohazards Assessment Project |
| Released | 2014 03 13 |
| Summary | (Plain Language Summary, not published)
In this study, seismic waveform data recorded at stations in the Gulf of St. Lawrence area are analyzed to constrain the regional seismic velocity
structure. The horizontal component seismograms are compared to the vertical component to delineate the depths and the amounts of contrast of velocity discontinuities at depths. Along the N-S profile, our preliminary results show that the crustal
thickness varies significantly from 28 km in the middle to 44 and 40 km in the north and south, respectively. In contrast, on the E-W profile, the thickest crust (46 km) is found beneath the middle station NATG. The crustal thickness gradually
decreases to the east (31 km, DRLN) and slightly to the west (44 km, ICQ). Given the relatively noisy site conditions that significantly limit the quality of earthquake waveform data, it is suggested that other technique, such as the ambient seismic
noise analysis, should be conducted in the future to provide further constraints. |
| GEOSCAN ID | 293724 |
|
|