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On the “400-Kilometers” Discontinuity in the Mediterranean Area

  • G. Scalera
  • G. Calcagnile
  • G. F. Panza
Part of the Ettore Majorana International Science Series book series (EMISS, volume 11)

Abstract

It has been shown by Schwab et. al.(1974) and Calcagnile and Panza (1974) that the study of Sa waves propagation is an extremely powerful tool for investigating the properties of the so called 400-km discontinuity. Nolet (1977) by using stacking techniques, has obtained the dispersion relations for the first seven Rayleigh modes in Western Europe in the period range typical for Sa waves. Over tectonically heterogeneous areas, like the European-Mediterranean area (Panza et al. 1980), it may be preferable the use of the standard two-station method (Panza, 1976), which allows the sampling of more limited areas, even if by this procedure the accuracy obtainable in phase velocity determinations is less than the accuracy proper of dispersion relations obtained by stacking.

Keywords

Rayleigh Wave Baltic Shield Gravimetric Geoid Mantle Transition Zone Rayleigh Mode 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Akimoto, S., Fujisawa, H., 1968, Olivine-spinel solid solution equilibria in the sistem Mg2SiO4-Fe2SiO4, J. Geophys. Res., 73, 1467–1479.CrossRefGoogle Scholar
  2. Anderson, L., 1968, Chemical inhomogeneity of the mantle, Earth and Planetary Sci. Lett., 5, 89–94.CrossRefGoogle Scholar
  3. Bott, M. H. P., 1971, The mantle transition zone as possible source of global gravity anomalies, Earth and Planetary Sci. Lett., 11, 28–34.Google Scholar
  4. Calcagnile, G., Panza, G. F., 1974, Vertical and SV components of Sa, Geophys.J.R. Astr. Soc., 38, 317–325.CrossRefGoogle Scholar
  5. Calcagnile, G., Panza, G. F., 1978, Crust and upper mantle structure under the Baltic shield and Barent’s sea from the dispersion of Rayleigh waves, Tectonophysics, 47, 59–71.CrossRefGoogle Scholar
  6. Calcagnile, G., Panza, G. F., Knopoff, L., 1979, Upper mantle structure of North-Central Italy from Rayleigh waves phase velocities, Tectonophysics, 56, 51–63.CrossRefGoogle Scholar
  7. Chapman, D. S., Pollack, H. N., Cermak, V., 1979, Global heat flow with special reference to the region of Europe, in: “Terrestrial heat flow in Europe,” V. Cermak and L. R. Rybach, ed., Springer-Verlag, Berlin.Google Scholar
  8. Fuchs, K., Mayer-Rosa, D., Liebau, F., 1971, Lateral inhomogeneities of the earth’s mantle and their petrological interpretation, Zeits.Fur Geophysik, 37, 937–942.Google Scholar
  9. Kaula, W. M., 1970, Earth’s gravity field: relation to global tectonics, Science, 169, 982–985.Google Scholar
  10. Mayer-Rosa, D., Mueller, S., 1973, The gross Velocity-Depth distribution of P-and S-waves in the upper mantle of Europe from earthquake observations, Zeits.Fur Geophysik, 39, 395–410.Google Scholar
  11. Mseddi, R., 1976, Determination sismique de la structure du manteau superieur sous le Mediterranee, PhD Thesis, Université P. et M. Curie, Paris VI.Google Scholar
  12. NASA, 1977, Global detailed gravimetric geoid based upon a combination of the GSFC GEM-10 Earth model and 1×1 surface gravity data, Goddard Space Flight Center Greenbelt, Maryland.Google Scholar
  13. Nolet, G., 1977, The upper mantle under western Europe inferred from the dispersion of Rayleigh modes, J. Geophys. 43, 265–285.Google Scholar
  14. Panza, G. F., 1976, Phase velocity determination of fundamental Love and Rayleigh waves, Pure and Applied Geophys., 114, 753–763.CrossRefGoogle Scholar
  15. Panza, G. F., Calcagnile, G., Scandone, P., Mueller, S., 1980, La struttura profonda dell’area mediterranea, Le Scienze, 24, n 141, 60–69.Google Scholar
  16. Panza, G. F., Scalera, G., 1978, Higher mode dispersion measurement, Pure and Applied Geophys., 116, 1283-1294.Google Scholar
  17. Schwab, F., Kausel, E., Knopoff, L., 1974, Interpretation of Sa for a shield structure, Geophys. J. R. As tr. Soc., 36, 737–742.CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • G. Scalera
    • 1
  • G. Calcagnile
    • 2
  • G. F. Panza
    • 2
  1. 1.Istituto Nazionale di GeofisicaRomaItaly
  2. 2.Istituto di Geodesia e GeofisicaUniversità di BariItaly

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