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The correlation between stress direction and extinction pattern of radial crystal fibres in synthetic quartz aggregates

Authors
Journal
Journal of Structural Geology
0191-8141
Publisher
Elsevier
Publication Date
Volume
11
Issue
6
Identifiers
DOI: 10.1016/0191-8141(89)90010-2
Keywords
  • Short Note

Abstract

Abstract Experimentally deformed synthetic quartz aggregates composed of spherulites show a strong relationship between the direction of applied stress (shortening direction) and the extinction pattern of deformed radial fibres as seen in a polarizing optical microscope. This pattern can be used to indicate that deformation has taken place and to determine the orientation of the principal stress responsible for the deformation.

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