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


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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/40199

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
Relation:	http://www.igsoc.org/
Type:	article
URI:	http://hdl.handle.net/2115/40199
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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