Articles | Volume 19, issue 2
https://doi.org/10.5194/tc-19-827-2025
© Author(s) 2025. 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-19-827-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
25 Feb 2025
Research article |
| 25 Feb 2025
| 25 Feb 2025
Evolution of crystallographic preferred orientations of ice sheared to high strains by equal-channel angular pressing
Qinyu Wang
Center for High Pressure Science and Technology Advanced Research, Beijing, 100193, China
Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China
Department of Geology, University of Otago, Ōtepoti / Dunedin, 9016, Aotearoa / New Zealand
Sheng Fan
Department of Geology, University of Otago, Ōtepoti / Dunedin, 9016, Aotearoa / New Zealand
Daniel H. Richards
Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, 7005, Australia
Rachel Worthington
Department of Geology, University of Otago, Ōtepoti / Dunedin, 9016, Aotearoa / New Zealand
David J. Prior
Department of Geology, University of Otago, Ōtepoti / Dunedin, 9016, Aotearoa / New Zealand
Chao Qi
CORRESPONDING AUTHOR
Center for High Pressure Science and Technology Advanced Research, Beijing, 100193, China
Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China
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We performed uniaxial compression experiments on synthetic ice samples. We report ice microstructural evolution at –20 and –30 °C that has never been reported before. Microstructural data show the opening angle of c-axis cones decreases with increasing strain or with decreasing temperature, suggesting a more active grain rotation. CPO intensity weakens with temperature because CPO of small grains is weaker, and it can be explained by grain boundary sliding or nucleation with random orientations.
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Short summary
Ice often exhibits a single-cluster fabric when deformed to high strains in glaciers and ice sheets. Using the equal-channel angular pressing technique, we achieved high shear strains in laboratory experiments and examined the fabrics. We investigated the evolutions of fabric and recrystallization mechanisms with strain. The results suggest that rotation recrystallization dominates fabric development when ice is deformed to high strains, explaining the fabrics found in natural ice.
Ice often exhibits a single-cluster fabric when deformed to high strains in glaciers and ice...
