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Volume 27 Number 2
  • E-ISSN: 1365-2478

Abstract

A

Seismic velocity anisotropy is predicted for cracked rocks containing either a naturally‐occurring or an artificially‐induced preferred orientation of cracks. Methods developed for the study of velocity anisotropy in the uppermost mantle have been applied to the measurement of P‐wave velocity anisotropy in fractured Carboniferous Limestone in Northwest England. At three different sites, first‐arrival travel‐time data has been obtained using conventional refraction equipment and a weight‐drop source. Velocity anisotropy of 15–29% is identified with directions of maximum and minimum velocities that can be broadly related to previously mapped orientations of joints.

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2006-04-27
2024-04-26

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References

  1. Anderson, D. L., Minster, B., and Cole, D., 1974, The effect of oriented cracks on seismic velocities, J. geophys. Res.79, 4011–4015.
    [Google Scholar]
  2. Backus, G. E., 1965, Possible forms of seismic anisotropy of the uppermost mantle under oceans, J. geophys. Res.70, 3429–3439.
    [Google Scholar]
  3. Bamford, D., 1973, An example of the iterative approach to time‐term analysis, Geophys. J. R. astr. Soc.31, 365–372.
    [Google Scholar]
  4. Bamford, D., 1977, P n velocity anisotropy in a continental upper mantle, Geophys. J. R. astr. Soc.49, 29–48.
    [Google Scholar]
  5. Bamford, D., and Crampin, S., 1977, Seismic anisotropy—the state of the art, Geophys. J. R. astr. Soc.49, 1–8.
    [Google Scholar]
  6. Crampin, S., 1977, A review of the effects of anisotropic layering on the propagation of seismic waves, Geophys. J. R. astr. Soc.49, 9–27.
    [Google Scholar]
  7. Crampin, S., and Bamford, D., 1977, Inversion of P‐wave velocity anisotropy, Geophys. J. R. astr. Soc.49, 123–132.
    [Google Scholar]
  8. Dahlen, F. A., 1972, Elastic velocity anisotropy in the presence of an anisotropic initial stress, Bull. seis. Soc. Am.62, 1183–1193.
    [Google Scholar]
  9. Davies, O. L., 1961, Statistical methods in research and production, 3rd edition, Oliver and Boyd, Edinburgh , 369 p.
     [Google Scholar]
  10. Hagedoorn, J. G., 1959, The plus‐minus method of interpreting seismic refraction sections, Geophys. Prospect.7, 158–182.
    [Google Scholar]
  11. Moseley, F., 1972, A tectonic history of northwest England, J. geol. Soc. Lond.128, 561–598.
    [Google Scholar]
  12. Moseley, F., 1973, Orientations and origins of joints, faults and folds in the Carboniferous Limestones of N.W. England, Trans. Cave Research Group of Great Britain15, 99–106.
    [Google Scholar]
  13. Moseley, F., and Ahmed, S. M., 1967, Carboniferous joints in the north of England and their relation to earlier and later structures, Proc. Yorks. geol. Soc.36, 61–90.
    [Google Scholar]
  14. Nur, A., 1971, Effects of stress on velocity anisotropy in rocks with cracks, J. geophys. Res.76, 2022–2034.
    [Google Scholar]
  15. Todd, T., Simmons, G., and Baldridge, W. S., 1973, Acoustic double refraction in low‐porosity rocks, Bull. seis. Soc. Am.63, 2007–2020.
    [Google Scholar]
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  • Article Type: Research Article

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