P- and S-wave attenuation estimates of stacked basalt flows in the North Atlantic Margin

Schuler, J. and Christie, P. A. F. and White, R. S. (2011) P- and S-wave attenuation estimates of stacked basalt flows in the North Atlantic Margin. Society of Exploration Geophysicists, extended abstracts. pp. 520-525. DOI https://doi.org/10.1190/1.3628135

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Abstract

We present compressional (P-) and converted shear (S-) wave attenuation estimates (Q-values) obtained from near zero-offset VSP recordings through stacked basalt flows in the North Atlantic volcanic margin. The estimates are calculated with the classical spectral ratio method and root-mean-square amplitude technique. Effective attenuation estimates of 15–26 and 14–16 are obtained for P- and S-waves, respectively. This is one of the first shear wave attenuation estimates from a stacked basalt formation. Synthetic modeling reveals that seismic attenuation in the stacked basalt flow sequence is mainly caused by scattering, corresponding to Qscat = 27–29 for P- and S-waves where intrinsic energy absorption is small. ©2011 Society of Exploration Geophysicists

Item Type:	Article
Additional Information:	cml schlumberger
Uncontrolled Keywords:	2011AREP; IA63; cml;
Subjects:	02 - Geodynamics, Geophysics and Tectonics
Divisions:	02 - Geodynamics, Geophysics and Tectonics
Journal or Publication Title:	Society of Exploration Geophysicists, extended abstracts
Page Range:	pp. 520-525
Identification Number:	https://doi.org/10.1190/1.3628135
Depositing User:	Sarah Humbert
Date Deposited:	22 Oct 2011 14:17
Last Modified:	23 Jul 2013 10:02
URI:	http://eprints.esc.cam.ac.uk/id/eprint/2227

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