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Science 11 October 1996:
Vol. 274. no. 5285, pp. 226 - 228
DOI: 10.1126/science.274.5285.226
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Reports
Lithosphere-Scale Seismic Image of the Southern Urals from
Explosion-Source Reflection Profiling
J. H. Knapp,
D. N. Steer,
L. D. Brown,
R. Berzin,
A. Suleimanov,
M. Stiller,
E. Lüschen,
D. L. Brown,
R. Bulgakov,
S. N. Kashubin,
A. V. Rybalka
Explosive-source deep seismic reflection data from the southern
Ural Mountains of central Russia provided a lithosphere-scale image of
the central Eurasian plate that reveals deep reflections (35 to 45 seconds in travel time;  130 to 170 kilometers deep) from the mantle.
The data display laterally variable reflectivity at the base of the
crust that deepens beneath the central part of the profile, documenting
a crustal thickness of 55 to 60 kilometers beneath the axis of the
orogen. These data provide an image of the structure of the crust and
underlying mantle lithosphere in a preserved collisional orogen,
perhaps to the base of the lithosphere.
J. H. Knapp, D. N. Steer, L. D. Brown, Institute for the Study of
the Continents, Cornell University, Ithaca, NY 14853, USA.
R. Berzin and A. Suleimanov, Spetsgeofisika, Moscow, 107140 Russia.
M. Stiller and E. Lüschen, GeoForschungsZentrum, D-14473 Potsdam,
Germany.
D. L. Brown, Instituto de Ciencias de la Tierra, Consejo Superior de
Investigaciones Cientificas-Barcelona, 08028 Spain.
R. Bulgakov, Bashneftegeofizika, Ufa, 450000 Russia.
S. N. Kashubin and A. V. Rybalka, Bazhenov Geophysical Expedition,
Scheelite, 624051 Russia.
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