Structure and sedimentology of George VI Ice Shelf, Antarctic Peninsula: implications for ice-sheet dynamics and landform development
Collapse of Antarctic ice shelves in response to a warming climate is well documented, but its legacy in terms of depositional landforms is little known. This paper uses remote-sensing, structural glaciological and sedimentological data to evaluate the evolution of the c . 25000 km 2 George VI Ice S...
Main Authors: | , , , , , |
---|---|
Format: | Dataset |
Language: | unknown |
Published: |
Geological Society of London
2016
|
Subjects: | |
Online Access: | https://dx.doi.org/10.6084/m9.figshare.3453959.v1 https://geolsoc.figshare.com/articles/dataset/Structure_and_sedimentology_of_George_VI_Ice_Shelf_Antarctic_Peninsula_implications_for_ice-sheet_dynamics_and_landform___development/3453959/1 |
id |
ftdatacite:10.6084/m9.figshare.3453959.v1 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.6084/m9.figshare.3453959.v1 2023-05-15T13:15:19+02:00 Structure and sedimentology of George VI Ice Shelf, Antarctic Peninsula: implications for ice-sheet dynamics and landform development Hambrey, Michael J. Davies, Bethan J. Glasser, Neil F. Holt, Tom O. Smellie, John L. Carrivick, Jonathan L. 2016 https://dx.doi.org/10.6084/m9.figshare.3453959.v1 https://geolsoc.figshare.com/articles/dataset/Structure_and_sedimentology_of_George_VI_Ice_Shelf_Antarctic_Peninsula_implications_for_ice-sheet_dynamics_and_landform___development/3453959/1 unknown Geological Society of London https://dx.doi.org/10.1144/jgs2014-134 https://dx.doi.org/10.6084/m9.figshare.3453959 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY Geology FOS Earth and related environmental sciences dataset Dataset 2016 ftdatacite https://doi.org/10.6084/m9.figshare.3453959.v1 https://doi.org/10.1144/jgs2014-134 https://doi.org/10.6084/m9.figshare.3453959 2021-11-05T12:55:41Z Collapse of Antarctic ice shelves in response to a warming climate is well documented, but its legacy in terms of depositional landforms is little known. This paper uses remote-sensing, structural glaciological and sedimentological data to evaluate the evolution of the c . 25000 km 2 George VI Ice Shelf, SW Antarctic Peninsula. The ice shelf occupies a north–south-trending tectonic rift between Alexander Island and Palmer Land, and is nourished mainly by ice streams from the latter region. The structure of the ice shelf is dominated by inherited foliation and fractures, and with velocity data indicates a largely compressive flow regime. The formation of a moraine complex at the margin of the ice shelf is controlled by debris entrained within foliation and folds. This englacial debris is of basal origin, and includes both local Mesozoic sedimentary and volcanic lithologies, and exotic crystalline rocks from Palmer Land. Folding of basal ice to a high level in the source glaciers on Palmer Land is required to bring the debris to the surface. These results have implications for understanding flow dynamics of ice shelves under compressive flow, and debris entrainment and moraine formation associated with palaeo-ice shelves. Dataset Alexander Island Antarc* Antarctic Antarctic Peninsula George VI Ice Shelf Ice Sheet Ice Shelf Ice Shelves Palmer Land DataCite Metadata Store (German National Library of Science and Technology) Alexander Island ENVELOPE(-69.895,-69.895,-71.287,-71.287) Antarctic Antarctic Peninsula George VI Ice Shelf ENVELOPE(-67.840,-67.840,-71.692,-71.692) Palmer Land ENVELOPE(-65.000,-65.000,-71.500,-71.500) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Geology FOS Earth and related environmental sciences |
spellingShingle |
Geology FOS Earth and related environmental sciences Hambrey, Michael J. Davies, Bethan J. Glasser, Neil F. Holt, Tom O. Smellie, John L. Carrivick, Jonathan L. Structure and sedimentology of George VI Ice Shelf, Antarctic Peninsula: implications for ice-sheet dynamics and landform development |
topic_facet |
Geology FOS Earth and related environmental sciences |
description |
Collapse of Antarctic ice shelves in response to a warming climate is well documented, but its legacy in terms of depositional landforms is little known. This paper uses remote-sensing, structural glaciological and sedimentological data to evaluate the evolution of the c . 25000 km 2 George VI Ice Shelf, SW Antarctic Peninsula. The ice shelf occupies a north–south-trending tectonic rift between Alexander Island and Palmer Land, and is nourished mainly by ice streams from the latter region. The structure of the ice shelf is dominated by inherited foliation and fractures, and with velocity data indicates a largely compressive flow regime. The formation of a moraine complex at the margin of the ice shelf is controlled by debris entrained within foliation and folds. This englacial debris is of basal origin, and includes both local Mesozoic sedimentary and volcanic lithologies, and exotic crystalline rocks from Palmer Land. Folding of basal ice to a high level in the source glaciers on Palmer Land is required to bring the debris to the surface. These results have implications for understanding flow dynamics of ice shelves under compressive flow, and debris entrainment and moraine formation associated with palaeo-ice shelves. |
format |
Dataset |
author |
Hambrey, Michael J. Davies, Bethan J. Glasser, Neil F. Holt, Tom O. Smellie, John L. Carrivick, Jonathan L. |
author_facet |
Hambrey, Michael J. Davies, Bethan J. Glasser, Neil F. Holt, Tom O. Smellie, John L. Carrivick, Jonathan L. |
author_sort |
Hambrey, Michael J. |
title |
Structure and sedimentology of George VI Ice Shelf, Antarctic Peninsula: implications for ice-sheet dynamics and landform development |
title_short |
Structure and sedimentology of George VI Ice Shelf, Antarctic Peninsula: implications for ice-sheet dynamics and landform development |
title_full |
Structure and sedimentology of George VI Ice Shelf, Antarctic Peninsula: implications for ice-sheet dynamics and landform development |
title_fullStr |
Structure and sedimentology of George VI Ice Shelf, Antarctic Peninsula: implications for ice-sheet dynamics and landform development |
title_full_unstemmed |
Structure and sedimentology of George VI Ice Shelf, Antarctic Peninsula: implications for ice-sheet dynamics and landform development |
title_sort |
structure and sedimentology of george vi ice shelf, antarctic peninsula: implications for ice-sheet dynamics and landform development |
publisher |
Geological Society of London |
publishDate |
2016 |
url |
https://dx.doi.org/10.6084/m9.figshare.3453959.v1 https://geolsoc.figshare.com/articles/dataset/Structure_and_sedimentology_of_George_VI_Ice_Shelf_Antarctic_Peninsula_implications_for_ice-sheet_dynamics_and_landform___development/3453959/1 |
long_lat |
ENVELOPE(-69.895,-69.895,-71.287,-71.287) ENVELOPE(-67.840,-67.840,-71.692,-71.692) ENVELOPE(-65.000,-65.000,-71.500,-71.500) |
geographic |
Alexander Island Antarctic Antarctic Peninsula George VI Ice Shelf Palmer Land |
geographic_facet |
Alexander Island Antarctic Antarctic Peninsula George VI Ice Shelf Palmer Land |
genre |
Alexander Island Antarc* Antarctic Antarctic Peninsula George VI Ice Shelf Ice Sheet Ice Shelf Ice Shelves Palmer Land |
genre_facet |
Alexander Island Antarc* Antarctic Antarctic Peninsula George VI Ice Shelf Ice Sheet Ice Shelf Ice Shelves Palmer Land |
op_relation |
https://dx.doi.org/10.1144/jgs2014-134 https://dx.doi.org/10.6084/m9.figshare.3453959 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.3453959.v1 https://doi.org/10.1144/jgs2014-134 https://doi.org/10.6084/m9.figshare.3453959 |
_version_ |
1766268041016901632 |