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Double Discontinuity in the Upper Mantle

Nature Physical Science volume 231, pages 201–203 (1971)Cite this article

Abstract

ALTHOUGH the use of seismic arrays for direct measurement of P wave travel time gradients (d T/dΔ) has greatly improved the resolution of upper mantle structure1–3, the technique is limited by the effects of local crustal structure beneath arrays and by the paucity of events giving arrivals of sufficient quality for dT/dΔ measurements. Using the Australian array WRA, we find that the combination of a large quantity of travel time data with selected dT/dΔ measurements provides a more powerful tool for the interpretation of P wave arrivals than either technique used in isolation.

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References

  1. Johnson, L. R., J. Geophys. Res., 72, 6309 (1967).

    Article  ADS  Google Scholar 

  2. Kanamori, H., Bull. Earthquake Res. Inst. Tokyo Univ., 45, 657 (1967).

    Google Scholar 

  3. Niazi, M., and Anderson, D. L., J. Geophys. Res., 70, 4633 (1965).

    Article  ADS  Google Scholar 

  4. Cleary, J. R., Wright, C., and Muirhead, K. J., Geophys. J., 16, 21 (1968).

    Article  ADS  Google Scholar 

  5. Wright, C., thesis, Australian National Univ. (1970).

  6. Wright, C., Earth Planet, Sci. Lett., 8, 41 (1970).

    Article  ADS  Google Scholar 

  7. Archambeau, C. B., Flinn, E. A., and Lambert, D. G., J. Geophys. Res., 74, 5825 (1969).

    Article  ADS  Google Scholar 

  8. Green, R. W. E., and Hales, A. L., Bull. Seism. Soc. Amer., 58, 267 (1968).

    Google Scholar 

  9. Whitcomb, J. H., and Anderson, D. L., J. Geophys. Res., 75, 5713 (1970).

    Article  ADS  Google Scholar 

  10. Anderson, D. L., Science, 157, 1165 (1967).

    Article  ADS  Google Scholar 

  11. Ringwood, A. E., Phys. Earth Planet. Interiors, 3, 109 (1970).

    Article  ADS  Google Scholar 

  12. Ringwood, A. E., in The Earth's Crust and Upper Mantle, Geophys. Monog. (edit, by Hart, P. J.), 13, 1 (American Geophysical Union, Washington, 1969).

    Google Scholar 

  13. Toksöz, M. N., Minear, J. W., and Julian, B. R., J. Geophys. Res., 76, 1113 (1971).

    Article  ADS  Google Scholar 

Download references

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Author notes

  1. C. WRIGHT

    Present address: Department of Energy, Mines and Resources, Ottawa

Authors and Affiliations

  1. Department of Geophysics and Geochemistry, Australian National University, Canberra, ACT

    D. W. SIMPSON, C. WRIGHT & J. R. CLEARY

Authors
  1. D. W. SIMPSON
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  2. C. WRIGHT
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  3. J. R. CLEARY
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SIMPSON, D., WRIGHT, C. & CLEARY, J. Double Discontinuity in the Upper Mantle. Nature Physical Science 231, 201–203 (1971). https://doi.org/10.1038/physci231201a0

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