Recrystallization and deformation mechanisms in the NEEM deep ice core, Greenland
An overview of the deformation and recrystallization mechanisms that are active in the North Greenland Eemian Ice Drilling (NEEM) ice core is given, based on microscale models, light microscopy and cryogenic electron backscatter diffraction (cryo-EBSD). The Holocene ice (0-1419 m depth) deforms by d...
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ftawi:oai:epic.awi.de:53085 2023-05-15T16:27:40+02:00 Recrystallization and deformation mechanisms in the NEEM deep ice core, Greenland Kuiper, Ernst-Jan Drury, Martyn R. Pennock, Gill M. de Bresser, Hans Weikusat, Ilka 2020-08-24 https://epic.awi.de/id/eprint/53085/ http://www.geoutrecht2020.org https://hdl.handle.net/10013/epic.634dee4d-ca7e-4ea7-b92c-4cd388c66ddc unknown DVGeo, DGGV, EPOS Kuiper, E. J. , Drury, M. R. , Pennock, G. M. , de Bresser, H. and Weikusat, I. orcid:0000-0002-3023-6036 (2020) Recrystallization and deformation mechanisms in the NEEM deep ice core, Greenland , GeoUtrecht 2020, Utrecht, 100% virtual, 24 August 2020 - 26 August 2020 . hdl:10013/epic.634dee4d-ca7e-4ea7-b92c-4cd388c66ddc EPIC3GeoUtrecht 2020, Utrecht, 100% virtual, 2020-08-24-2020-08-26Utrecht, DVGeo, DGGV, EPOS Conference notRev 2020 ftawi 2021-12-24T15:45:56Z An overview of the deformation and recrystallization mechanisms that are active in the North Greenland Eemian Ice Drilling (NEEM) ice core is given, based on microscale models, light microscopy and cryogenic electron backscatter diffraction (cryo-EBSD). The Holocene ice (0-1419 m depth) deforms by dislocation creep with basal slip accommodated by non-basal slip. The amount of non-basal slip is controlled by the extent of strain induced boundary migration (SIBM). The most important recrystallization mechanisms and processes in the Holocene ice are grain dissection, strain induced boundary migration (SIBM), and bulging nucleation. In the glacial ice (1419-2207 m of depth) basal slip is accommodated by both non-basal slip and grain boundary sliding (GBS). Rotation recrystallization is more important, while SIBM is less important in the glacial ice compared to the Holocene ice. In the Eemian ice (2207-2540 m depth), which is at high temperature, different microstructures occur depending on the impurity content of the ice. The difference in microstructure and deformation mechanisms, between interglacial and glacial ice can have important consequences for ice rheology and ice sheet dynamics. Conference Object Greenland ice core Ice Sheet North Greenland Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Greenland |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
An overview of the deformation and recrystallization mechanisms that are active in the North Greenland Eemian Ice Drilling (NEEM) ice core is given, based on microscale models, light microscopy and cryogenic electron backscatter diffraction (cryo-EBSD). The Holocene ice (0-1419 m depth) deforms by dislocation creep with basal slip accommodated by non-basal slip. The amount of non-basal slip is controlled by the extent of strain induced boundary migration (SIBM). The most important recrystallization mechanisms and processes in the Holocene ice are grain dissection, strain induced boundary migration (SIBM), and bulging nucleation. In the glacial ice (1419-2207 m of depth) basal slip is accommodated by both non-basal slip and grain boundary sliding (GBS). Rotation recrystallization is more important, while SIBM is less important in the glacial ice compared to the Holocene ice. In the Eemian ice (2207-2540 m depth), which is at high temperature, different microstructures occur depending on the impurity content of the ice. The difference in microstructure and deformation mechanisms, between interglacial and glacial ice can have important consequences for ice rheology and ice sheet dynamics. |
format |
Conference Object |
author |
Kuiper, Ernst-Jan Drury, Martyn R. Pennock, Gill M. de Bresser, Hans Weikusat, Ilka |
spellingShingle |
Kuiper, Ernst-Jan Drury, Martyn R. Pennock, Gill M. de Bresser, Hans Weikusat, Ilka Recrystallization and deformation mechanisms in the NEEM deep ice core, Greenland |
author_facet |
Kuiper, Ernst-Jan Drury, Martyn R. Pennock, Gill M. de Bresser, Hans Weikusat, Ilka |
author_sort |
Kuiper, Ernst-Jan |
title |
Recrystallization and deformation mechanisms in the NEEM deep ice core, Greenland |
title_short |
Recrystallization and deformation mechanisms in the NEEM deep ice core, Greenland |
title_full |
Recrystallization and deformation mechanisms in the NEEM deep ice core, Greenland |
title_fullStr |
Recrystallization and deformation mechanisms in the NEEM deep ice core, Greenland |
title_full_unstemmed |
Recrystallization and deformation mechanisms in the NEEM deep ice core, Greenland |
title_sort |
recrystallization and deformation mechanisms in the neem deep ice core, greenland |
publisher |
DVGeo, DGGV, EPOS |
publishDate |
2020 |
url |
https://epic.awi.de/id/eprint/53085/ http://www.geoutrecht2020.org https://hdl.handle.net/10013/epic.634dee4d-ca7e-4ea7-b92c-4cd388c66ddc |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core Ice Sheet North Greenland |
genre_facet |
Greenland ice core Ice Sheet North Greenland |
op_source |
EPIC3GeoUtrecht 2020, Utrecht, 100% virtual, 2020-08-24-2020-08-26Utrecht, DVGeo, DGGV, EPOS |
op_relation |
Kuiper, E. J. , Drury, M. R. , Pennock, G. M. , de Bresser, H. and Weikusat, I. orcid:0000-0002-3023-6036 (2020) Recrystallization and deformation mechanisms in the NEEM deep ice core, Greenland , GeoUtrecht 2020, Utrecht, 100% virtual, 24 August 2020 - 26 August 2020 . hdl:10013/epic.634dee4d-ca7e-4ea7-b92c-4cd388c66ddc |
_version_ |
1766017119783223296 |