Acoustic data from two long cores, comprising marine clays and silts taken from Emerald Basin off Nova Scotia, are presented. High‐resolution measurements of compressional wavevelocity,attenuation, and power law exponent are made using ultrasonic frequencies between 100 to 1000 kHz. The observed values of the frequency dependence of attenuation suggest that a nonconstant Q mechanism is needed to explain these data, and Biot–Stoll theory is used to model the experimental results. An inversion scheme is used to constrain physical parameters in the Biot–Stoll dispersion relation. The inversion shows that there is a restricted range of permeability and grain size. By assigning reasonable values for grain size in the inversion, the Biot–Stoll model predicts unique values for the permeability and frame bulk modulus that agree well with estimates made by other means.
Center for Coastal and Ocean Mapping Affiliate
Acoustical Society of America
Journal of the Acoustical Society of America
Digital Object Identifier (DOI)
The following article appeared in: R. C. Courtney, ‘Acoustic properties of fine-grained sediments from Emerald Basin: Toward an inversion for physical properties using the Biot–Stoll model’, The Journal of the Acoustical Society of America, vol. 93, no. 6, p. 3193, 1993. and may be found at http://dx.doi.org/10.1121/1.405703
© 1993 Acoustical Society of America.This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America.