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Author
Title
Highly deformed basal ice in the Vostok core, Antarctica
Type
Journal Article
Year
2002
Publication
Geophysical research letters
Abbreviated Journal
Volume
29
Issue
Pages
Keywords
1040 Geochemistry: Isotopic composition/chemistry; 1827 Hydrology: Glaciology; 4540 Oceanography: Physical: Ice mechanics and air/sea/ice exchange processes; 9310 Information Related to Geographic Region: Antarctica
Abstract
Our paper documents the build-up of a highly deformed basal ice layer in the basal part of the Vostok ice core. This is done mainly on the basis of an isotopic composition investigation of the ice. Complex deformation in the lower 228 m of the ice sheet has resulted in folding and intermixing of ice at a submetric scale and, for the upper part of this basal sequence, in interbedding of ice layers from distinct origins at a larger scale. This complex deformation occurred at a temperature largely below the pressure-melting point. The basal ice layer has built upwards and size-selective incorporation of bed material into the ice has taken place. The documentation of this complex basal deformation has implications for the maximum age of ice that will be useful in paleoclimate studies and for ice sheet dynamics.
Programme
902
Campaign
Address
Corporate Author
Thesis
Publisher
American Geophysical Union
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0094-8276
ISBN
Medium
Area
Expedition
Conference
Notes
Approved
yes
Call Number
IPEV @ Thierry.Lemaire @
Serial
5599
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