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Melt distribution in mantle rocks deformed in shear

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Date

2000

Authors

Zimmerman, M
Zhang, Shuqing
Kohlstedt, D
Karato, Shun-ichiro

Journal Title

Journal ISSN

Volume Title

Publisher

American Geophysical Union

Abstract

Shear experiments on olivine-basalt aggregates provide compelling evidence that the dynamic distribution of melt is controlled by the magnitude and orientation of the differential stress. Our results suggest that deformed, partially molten upper mantle rocks will have highly anisotropic physical properties including seismic wave velocities and melt permeability. In addition, our results provide a basis for interpreting geophysical observations, such as shear-wave splitting and for modeling melt migration processes beneath mid-ocean ridges, specifically focused flow of melt toward the ridge axis.

Description

Keywords

Keywords: Mechanical permeability; Sedimentary rocks; Seismic waves; Shear deformation; Shear stress; Shear waves; Mantle rocks; Tectonics; basalt; fluid flow; mantle process; melt; olivine; partial melting; shear test

Citation

URI

http://hdl.handle.net/1885/93750

Collections

ANU Research Publications

Source

Geophysical Research Letters

Type

Journal article

Book Title

Entity type

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DOI

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