The depth distribution of azimuthal anisotropy in the continental upper mantle

被引：0
|
作者：
Federica Marone
Barbara Romanowicz
机构：
[1] Berkeley Seismological Laboratory,
[2] 209 McCone Hall,undefined
[3] Berkeley,undefined
[4] California 94720,undefined
[5] USA,undefined
[6] Present address: Swiss Light Source,undefined
[7] WLGA/135,undefined
[8] Paul Scherrer Institute,undefined
[9] 5232 Villigen,undefined
[10] Switzerland.,undefined
来源：
Nature | 2007年 / 447卷
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摘要：
Evidence for the presence of two layers of anisotropy with different orientations in the North American upper mantle is presented. At asthenospheric depths, the fast axis is sub-parallel to the plate motion, confirming the presence of shear related to current tectonic processes, whereas within the lithosphere, the orientation is significantly different, indicating that anisotropy at these shallower depths was 'frozen-in' long ago.
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页码：198 / 201
页数：3
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