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Subgrain boundaries and related microstructural features in EDML (Antarctica) deep ice core

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Title: Subgrain boundaries and related microstructural features in EDML (Antarctica) deep ice core
Authors: Weikusat, Ilka Browse this author
Kipfstuhl, Sepp Browse this author
Faria, Sérgio H. Browse this author
Azuma, Nobuhiko Browse this author
Miyamoto, Atsushi Browse this author
Issue Date: Jun-2009
Publisher: International Glaciological Society
Journal Title: Journal of Glaciology
Volume: 55
Issue: 191
Start Page: 461
End Page: 472
Publisher DOI: 10.3189/002214309788816614
Abstract: Subgrain boundaries revealed as shallow sublimation grooves on ice sample surfaces are a direct and easily observable feature of intracrystalline deformation and recrystallization. Statistical data obtained from the EPICA Dronning Maud Land (EDML) deep ice core drilled in East Antarctica cannot detect a depth region of increased subgrain-boundary formation. Grain-boundary morphologies show a strong influence of internal strain energy on the microstructure at all depths. The data do not support the classical view of a change of dominating recrystallization regimes with depth. Three major types of subgrain boundaries, reflecting high mechanical anisotropy, are specified in combination with crystal-orientation analysis.
Rights: © 2009 International Glaciological Society
Type: article
Appears in Collections:低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 宮本 淳

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