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Highly deformed basal ice in the Vostok core, Antarctica
- Source :
- Geophysical Research Letters, Geophysical Research Letters, 2002, 29 (7), ⟨10.1029/2001GL014192⟩, Geophysical Research Letters, American Geophysical Union, 2002, 29 (7), ⟨10.1029/2001GL014192⟩
- Publication Year :
- 2002
- Publisher :
- HAL CCSD, 2002.
-
Abstract
- International audience; 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.
- Subjects :
- 1827 Hydrology: Glaciology (1863)
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere
geography
geography.geographical_feature_category
010504 meteorology & atmospheric sciences
4540 Oceanography: Physical: Ice mechanics and air/sea/ice exchange processes
Ice stream
1040 Geochemistry: Isotopic composition/chemistry
Antarctic sea ice
Pressure ridge
010502 geochemistry & geophysics
01 natural sciences
Geophysics
Ice core
9310 Information Related to Geographic Region: Antarctica
Pancake ice
Sea ice
General Earth and Planetary Sciences
Ice divide
Ice sheet
Petrology
[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment
Geomorphology
Geology
0105 earth and related environmental sciences
Subjects
Details
- Language :
- English
- ISSN :
- 00948276 and 19448007
- Database :
- OpenAIRE
- Journal :
- Geophysical Research Letters, Geophysical Research Letters, 2002, 29 (7), ⟨10.1029/2001GL014192⟩, Geophysical Research Letters, American Geophysical Union, 2002, 29 (7), ⟨10.1029/2001GL014192⟩
- Accession number :
- edsair.doi.dedup.....bc2e39d7cf6934805c44cd46cb5f7c76