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Science 26 February 1999:
Vol. 283. no. 5406, pp. 1306 - 1309
DOI: 10.1126/science.283.5406.1306
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Reports

Seismic Evidence for a Detached Indian Lithospheric Mantle Beneath Tibet

G. Kosarev, 1 R. Kind, 23* S. V. Sobolev, 2 X. Yuan, 2 W. Hanka, 2 S. Oreshin 1

P-to-S converted teleseismic waves recorded by temporary broadband networks across Tibet show a north-dipping interface that begins 50 kilometers north of the Zangbo suture at the depth of the Moho (80 kilometers) and extends to a depth of 200 kilometers beneath the Bangong suture. Under northern Tibet a segmented south-dipping structure was imaged. These observations suggest a different form of detachment of the Indian and Asian lithospheric mantles caused by differences in their composition and buoyancy.

1 Institute of the Physics of the Earth, Russian Academy of Sciences, B. Gruzinskaya 10, 128810 Moscow, Russia.
2 GeoForschungsZentrum Potsdam, Telegrafenberg, 14473 Potsdam, Germany.
3 Freie Universität Berlin, Geophysik, Malteser Strasse 74-100, 12249 Berlin, Germany.
*   To whom correspondence should be addressed. E-mail: kind{at}gfz-potsdam.de

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