Relation between neighbouring grains in the upper part of the NorthGRIP ice core - Implications for rotation recrystallization

We propose a new method to investigate the relationships between neighbouring crystals and apply it to the textures measured along the upper 900 m of the NorthGRIP ice core. This method shows unexpected correlations between neighbours in the so-called normal grain growth regime, questioning the clas...

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Bibliographic Details
Main Authors: Durand, Gael, Persson, Asbjørn, Samyn, Denis, Svensson, Anders
Format: Article in Journal/Newspaper
Language:English
Published: 2008
Subjects:
Sciences de l'espace
Géographie physique
Pétrologie
Géochimie
Sciences de la terre et du cosmos
ice recrystallization
ice-sheet
polycrystalline
ice core
Ice Sheet
Online Access:http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/189582
https://dipot.ulb.ac.be/dspace/bitstream/2013/189582/1/Elsevier_173209.pdf
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Summary:We propose a new method to investigate the relationships between neighbouring crystals and apply it to the textures measured along the upper 900 m of the NorthGRIP ice core. This method shows unexpected correlations between neighbours in the so-called normal grain growth regime, questioning the classical view on the onset of rotation recrystallization in ice-sheets. Moreover, the fractionation rate associated to the rotation recrystallization appears constant through time. Finally, grains with low-angle boundaries do not present a special distribution pattern of their c-axes. This suggests that rotation recrystallization is an isotropic process not affected by the direction of the macroscopic strain. © 2007 Elsevier B.V. All rights reserved. SCOPUS: ar.j info:eu-repo/semantics/published

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