Seismic imaging of the downwelling Indian lithosphere beneath central Tibet

被引：341

作者：

Tilmann, F ^{[1
]}

Ni, J ^{[1
]}

Hearn, T ^{[1
]}

Ma, YS ^{[1
]}

Rapine, R ^{[1
]}

Kind, R ^{[1
]}

Mechie, J ^{[1
]}

Saul, J ^{[1
]}

Haines, S ^{[1
]}

Klemperer, S ^{[1
]}

Brown, L ^{[1
]}

Pananont, P ^{[1
]}

Ross, A ^{[1
]}

Nelson, KD ^{[1
]}

Guo, J ^{[1
]}

Zhao, W ^{[1
]}

机构：

[1] New Mexico State Univ, Dept Phys, Las Cruces, NM 88003 USA

来源：

SCIENCE | 2003年 / 300卷 / 5624期

关键词：

D O I：

10.1126/science.1082777

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A tomographic image of the upper mantle beneath central Tibet from INDEPTH data has revealed a subvertical high-velocity zone from similar to 100- to similar 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.

引用

页码：1424 / 1427

页数：5

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