GEOSCAN, résultats de la recherche


TitreUpdate on recent observations in multi-component seismic reflection profiling
AuteurPugin, A J -M; Pullan, S E; Hunter, J A
SourceProceedings, SAGEEP'2010 (Symposium on the Application of Geophysics to Environmental and Engineering Problems); 2010 p. 607-614
Séries alt.Secteur des sciences de la Terre, Contribution externe 20090392
RéunionSAGEEP'2010; Keystone, CO; US; avril 11-15, 2010
Sujetslevés sismiques; profils sismiques; levés de reflexion sismiques; ondes sismiques; propagation des ondes; géophysique
ProgrammeAquifer Assessment & support to mapping, Géoscience des eaux souterraines
Résumé(disponible en anglais seulement)
Examples of multi-component shallow seismic reflection profiling from different environments in eastern Canada are presented to examine the benefits of shear wave reflection data and the latest developments in acquisition methodology, as well as our evolving understanding of the complex nature of seismic wave propagation. Examination of the wave motion through multi-component recording shows that, regardless of the source orientation, shear wave reflections may be polarized in varying directions. In "soft" soils characterized by low shear wave velocities, extremely high-resolution shear wave reflection sections can be obtained, with the highest-resolution data related to in-line or vertical components of motion. Data recorded in the transverse (SH) direction are generally somewhat lower in frequency but may be better able to penetrate into more compact (higher velocity) sediments. Multicomponent recording provides the capacity to record all data, without having to know the main shear wave polarization direction prior to data acquisition.