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Fabric and texture at Siple Dome, Antarctica

Journal of Glaciology
By: , and 

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Abstract

Preferred c-axis orientations are present in the firn at Siple Dome, West Antarctica, and recrystallization begins as shallow as 200 m depth in ice below -20??C, based on digital analysis of c-axis fabrics, grain-sizes and other characteristics of 52 vertical thin sections prepared in the field from the kilometer-long Siple Dome ice core. The shallowest section analyzed, from 22 m, shows clustering of c axes toward the vertical. By 200 m depth, girdle fabric and other features of recrystallized ice are evident in layers (or regions), separated by layers (regions) of typically finer-grained ice lacking evidence of recrystallization. Ice from about 700-780 m depth, which was deposited during the last ice age, is especially fine-grained, with strongly vertical c axes, but deeper ice shows much larger crystals and strong evidence of recrystallization. Azimuthal asymmetry of some c-axis fabrics, trends in grain-size, and other indicators reveal additional information on processes and history of ice flow at Siple Dome.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Fabric and texture at Siple Dome, Antarctica
Series title Journal of Glaciology
Volume 51
Issue 173
Year Published 2005
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Journal of Glaciology
First page 281
Last page 290