Mechanical Behaviour of Antarctic Ice
Open Access
- 1 January 1982
- journal article
- research article
- Published by International Glaciological Society in Annals of Glaciology
- Vol. 3, 92-95
- https://doi.org/10.1017/s0260305500002585
Abstract
The mechanisms of Antarctic ice deformation are discussed. Diffusional flow (Nabarro-Herring or Coble creep) seems to dominate creep for the first 905 m near Dome C. Formation mechanisms of single-maximum fabrics are examined. Dislocation creep does not explain the preferred c-axis orientation observed in the Antarctic ice sheet. The quantitative effects of crystallographic orientation on strain-rate are given. The activation energy for dislocation creep was found to be 78 kJ mol−1between -7.2°C and -30°C. Rate-limiting mechanisms are discussed.Keywords
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