Articles | Volume 13, issue 1
https://doi.org/10.5194/tc-13-351-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-13-351-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
01 Feb 2019
Research article |
| 01 Feb 2019
Crystallographic preferred orientations of ice deformed in direct-shear experiments at low temperatures
Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, PA, USA
Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China
David J. Prior
Department of Geology, University of Otago, Dunedin, New Zealand
Lisa Craw
Department of Geology, University of Otago, Dunedin, New Zealand
Sheng Fan
Department of Geology, University of Otago, Dunedin, New Zealand
Maria-Gema Llorens
Departament de Geologia, Universitat Autónoma de Barcelona,
Barcelona, Spain
Albert Griera
Departament de Geologia, Universitat Autónoma de Barcelona,
Barcelona, Spain
Marianne Negrini
Department of Geology, University of Otago, Dunedin, New Zealand
Paul D. Bons
Department of Geosciences, Eberhard Karls University of Tübingen, Tübingen, Germany
David L. Goldsby
Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, PA, USA
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Short summary
Ice deformed in nature develops crystallographic preferred orientations, CPOs, which induce an anisotropy in ice viscosity. Shear experiments of ice revealed a transition in CPO with changing temperature/strain, which is due to the change of dominant CPO-formation mechanism: strain-induced grain boundary migration dominates at higher temperatures and lower strains, while lattice rotation dominates at other conditions. Understanding these mechanisms aids the interpretation of CPOs in natural ice.
Ice deformed in nature develops crystallographic preferred orientations, CPOs, which induce an...
