Textures in experimentally deformed olivine aggregates: The effects of added water and melt

F. Heidelbach, B. Holtzman, S. Hier-Majumder, D. Kohlstedt

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The texture development in experimentally sheared aggregates of olivine was monitored as a function of increased water content and added melt. In dry samples, an alignment of {010} with the shear plane and 〈100〉 and 〈001〉 with the shear direction, respectively, was observed, consistent with intracrystalline glide on the (010)[100] and (010)[001] slip systems. Samples with high water content showed consistently stronger textures of the (010)[100] component for comparable shear strains indicating that water may especially ease glide on this slip system. Samples with added melt showed an increased alignment of {010} and 〈001〉 subparallel to shear plane and shear direction respectively, whereby the maxima were consistently rotated 10 to 20° against the sense of shear. This type of texture can be explained by a combination of increased glide on the (010)[001] slip system in combination with a partitioning of the strain between melt rich bands and relatively melt free regions in the sample. Physical anisotropies calculated from the textures indicate that increased water content causes enhanced anisotropy for longitudinal and transverse seismic waves. The addition of melt on the other hand may change the type of anisotropy that develops during deformation, but does not significantly change the magnitude of anisotropy compared to samples of pure olivine.

Original languageEnglish (US)
Title of host publicationTextures of Materials, ICOTOM 14 - Proceedings of the 14th International Conference on Textures of Materials
PublisherTrans Tech Publications Ltd
Pages63-68
Number of pages6
EditionPART 1
ISBN (Print)087849975X, 9780878499755
DOIs
StatePublished - Jan 1 2005
Event14th International Conference on Textures of Materials, ICOTOM 14 - Leuven, Belgium
Duration: Jul 11 2005Jul 15 2005

Publication series

NameMaterials Science Forum
NumberPART 1
Volume495-497
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

Other14th International Conference on Textures of Materials, ICOTOM 14
Country/TerritoryBelgium
CityLeuven
Period7/11/057/15/05

Keywords

  • Deformation
  • Melt
  • Olivine
  • Seismic anisotropy
  • Stress
  • Texture
  • Water

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