April 2016 

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Anisotropy in the lowermost mantle—a marker for geodynamic processes.

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Resource details

Resource ID

476

Access

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Contributed by

Admin User

Volume

48

Keywords

Anisotropy in the lowermost mantle—a marker for geodynamic processes.

Named person(s)

Lowell Miyagi

Date

11 April 16

Number

4

Abstract

Mantle convection is the internal engine that
drives the dynamic processes of the solid
Earth. Plate tectonics, the surface
expression of convection, has a profound
impact on the Earth’s surface through
processes such as mountain building,
earthquakes, and volcanism. Unfortunately
there is no direct method for imaging mantle
flow and our understanding of mantle
convection remains limited. In the late 60’s,
it was realized that anisotropic propagation
of seismic waves in the shallow upper
mantle is due to crystallographic preferred
orientation (texture) of minerals that
develops during convection related plastic
deformation. If the relationship between
deformation geometry, texture development,
and seismic anisotropy are well understood,
observations of seismic anisotropy can be
used to map flow patterns in the deep Earth.

Editors

Bob Biek

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