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Olivine recrystallization textures

Published online by Cambridge University Press:  05 July 2018

Donal M. Ragan
Donal M. Ragan*
Affiliation:
Department of Geology, Arizona State University, Tempe, Arizona 85281
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Summary

Mosaic olivine textures, with straight triple grain boundaries meeting at angles of 120°, are common in dunites. This is a well-known feature of annealed metals, and is the result of grain-boundary migration during recrystallization in which the system tends toward a state of minimum interfacial energies. Geometrically similar textures are present at the boundaries between such mosaic grains and strain-banded relict olivine grains. The unstrained mosaic grains make angular projections into the strained grains exactly at the junctions between the deformation bands. These are interpreted to be triple junctions with the two differently oriented bands acting as separate grains, and thus also due to recrystallization.

Type
Research Article
Information
Mineralogical Magazine , Volume 37 , Issue 286 , June 1969 , pp. 238 - 240
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1969

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