| Abstract: | Multichannel analysis of surface waves (MASW) method is a non-invasive geophysical technique that uses the dispersive characteristic of Rayleigh waves to estimate a vertical shear (S)-wave velocity profile. A pseudo-2D S-wave velocity section is constructed by aligning 1D S-wave velocity profiles at the midpoint of each receiver spread that are contoured using a spatial interpolation scheme. The horizontal resolution of the section is therefore most influenced by the receiver spread length and the source interval. Based on the assumption that a dipping-layer model can be regarded as stepped flat layers, high-resolution linear Radon transform (LRT) has been proposed to image Rayleigh-wave dispersive energy and separate modes of Rayleigh waves from a multichannel record. With the mode-separation technique, therefore, a dispersion curve that possesses satisfactory accuracy can be calculated using a pair of consecutive traces within a mode-separated shot gather. In this study, using synthetic models containing a dipping layer with a slope of 5, 10, 15, 20, or 30 degrees and a real-world example, we assess the ability of using high-resolution LRT to image and separate fundamental-mode Rayleigh waves from raw surface-wave data and accuracy of dispersion curves generated by a pair of consecutive traces within a mode-separated shot gather. Results of synthetic and real-world examples demonstrate that a dipping interface with a slope smaller than 15 degrees can be successfully mapped by separated fundamental waves using high-resolution LRT. ?? Birkh??user Verlag, Basel 2009. |
| Genre: | Article |
| ProdID: | 70034583 |
| Citation Author: | Luo, Y.; Xia, J.; Xu, Y.; Zeng, C.; Miller, R. D.; Liu, Q. |
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| Citation End Page: | 374 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Pure and Applied Geophysics |
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| Citation Number Of Pages: | 22 |
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| Citation Search Results Text: | Dipping-interface mapping using mode-separated Rayleigh waves; 2009; Article; Journal; Pure and Applied Geophysics; Luo, Y.; Xia, J.; Xu, Y.; Zeng, C.; Miller, R. D.; Liu, Q. |
| Citation Start Page: | 353 |
| Citation Volume: | 166 |
| Citation Year: | 2009 |
| Type: | citation/reference |
| Text: | Dipping-interface mapping using mode-separated Rayleigh waves; 2009; Article; Journal; Pure and Applied Geophysics; Luo, Y.; Xia, J.; Xu, Y.; Zeng, C.; Miller, R. D.; Liu, Q. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1007/s00024-009-0451-z |
| Date Other: | Thu, 1 Jan 2009 00:00 -0600 |
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