Peculiarities of mantle waves from long-range profiles
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Vols. 1-18 (1924-1944), ISSN 0044-2801
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Abstract
Long-range seismic experiments carried out in different regions of the USSR show strong variations of the mantle wave velocities and attenuation. Relatively high mantle velocities, more than 8.2–8.3 km/s, are observed in the old platform areas. To exclude the crustal influence on the mantle waves and to separate the vertical and horizontal inhomogeneity effect the relations between the overlapping travel-time curves are analyzed. As a result, a mantle stratification with positive average velocity gradient in the strata is revealed up to depths of 200 km. Local inclusions with very high (more than 8.5 km/s) and relatively low (less 8.0 km/s) velocities are typical of the mantle.
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References
Averbuch, A.G. (1975) Interpretation of seismic refraction data. Nedra, Moscow
Burmakov, Y.A., Yegorkin, A.V., Popov, E.A., Ryaboy, V.Z. (1975) Upper mantle structure of the north-eastern regions of the European Platform from seismic data. Dokl. Akad. Nauk SSSR 224:84-87
Chichinin, I.S., Yegorov, G.V., Yemelianov, A.V., Bochanov, A.J. (1969) Portable telemonitored seismic equipment "Taiga". In: Methods of seismic research, pp. 95-119. Nauka, Moscow
Fuchs, K.: Structure, physical properties and lateral heterogeneities of the subcrustal lithosphere from long-range deep seismic sounding observations on continents. Tectonophysics 56, 1-5:1979
Gamburzev, G.A., Riznichenko, J.V., Berson, I.S. et al. (1952) Correlation method of refracted waves, AN SSSR, Moscow, 90-140
Pavlenkova, N.I., Pšenčik, I. (1977) Mathematical modelling as a method of solution of two-dimensional seismic problem, Publ. Inst. Geophys. Pol. Acad. Sc. A-4(115):267-275
Steinmetz, L., Whitmarsh, R.B., Moreira, V.S. (1977) Upper mantle structure beneath the Mid-Atlantic Ridge north of the Azores based on observations of compressional waves. Geophys. J. R. Astron. Soc. 50:353-380
Shimamura, H., Asada, T.A. (1976) Apparent velocity measurements on an oceanic lithosphere. Phys. Earth Planet. Int. 13v15-22
Yegorkin, A.V. (1980) General features of mantle structure. In: Seismic models of the lithosphere for the major geostructures on the territory of the USSR, pp. 161-170. Nauka, Moscow
Yegorkin, A.V., Pavlenkova, N.I. (1981) Studies of mantle structure of USSR territory on long-range seismic profiles. Phys. Earth Planet. Int. 25:12-26
Yegorkin, A.V., Ryaboy, V.Z., Starobinets, L.N., Druzinin, V.S. (1977) Construction of horizontal heterogeneous velocity model of the upper mantle from DSS data. Izv. AN SSSR, Fizika Zemli 7