Seismic imaging of the downwelling Indian lithosphere beneath Central Tibet

Tilmann, Frederik; Ni, J.; INDEPTH III Seismic Team,; 2.2 Geophysical Deep Sounding, 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum

doi:10.1126/science.1082777

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Seismic imaging of the downwelling Indian lithosphere beneath Central Tibet

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Tilmann, Frederik
Publikationen aller GIPP-unterstützten Projekte, Deutsches GeoForschungsZentrum;
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Ni, J.
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Publikationen aller GIPP-unterstützten Projekte, Deutsches GeoForschungsZentrum;

INDEPTH III Seismic Team,
Deutsches GeoForschungsZentrum;
Publikationen aller GIPP-unterstützten Projekte, Deutsches GeoForschungsZentrum;

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Tilmann, F., Ni, J., INDEPTH III Seismic Team (2003): Seismic imaging of the downwelling Indian lithosphere beneath Central Tibet. - Science, 300, 5624, 1424-1427.
https://doi.org/10.1126/science.1082777

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_230411

Abstract

A tomographic image of the upper mantle beneath central Tibet from INDEPTH data has revealed a subvertical high-velocity zone from 100- to 400- kilometers depth, located approximately south of the Bangong-Nujiang Suture. We interpret this zone to be downwelling Indian mantle lithosphere. This additional lithosphere would account for the total amount of shortening in the Himalayas and Tibet. A consequence of this downwelling would be a deficit of asthenosphere, which should be balanced by an upwelling counterflow, and thus could explain the presence of warm mantle beneath north-central Tibet.