| Issue |
Europhys. Lett.
Volume 67, Number 6, September 2004
|
|
|---|---|---|
| Page(s) | 1038 - 1044 | |
| Section | Interdisciplinary physics and related areas of science and technology | |
| DOI | https://doi.org/10.1209/epl/i2004-10139-0 | |
| Published online | 01 September 2004 | |
Deformation of grain boundaries in polar ice
1
Laboratoire de Glaciologie et de Géophysique de l'Environnement (FRE 2192 CNRS - Université J. Fourier Grenoble 1) BP 96, F-38402 Saint Martin d'Hères cedex, France
2
Laboratoire de Spectrométrie Physique (UMR 5588 CNRS -Université J. Fourier Grenoble 1) BP 87, F-38402 Saint Martin d'Hères cedex, France
Corresponding author: graner@ujf-grenoble.fr
Received:
5
April
2004
Accepted:
8
July
2004
The ice microstructure (grain boundaries) is a key feature used to study ice evolution and to investigate past climatic changes. We studied a deep ice core, in Dome Concordia, Antarctica, which records past mechanical deformations. We measured a “texture tensor” which characterizes the pattern geometry and reveals local heterogeneities of deformation along the core. These results question key assumptions of the current models used for dating.
PACS: 83.80.Nb – Geological materials: Earth, magma, ice, rocks, etc / 81.70.-q – Methods of materials testing and analysis / 62.20.Fe – Deformation and plasticity (including yield, ductility, and superplasticity)
© EDP Sciences, 2004
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