Distribution of subglacial sediments across the Wilkes Subglacial Basin, East Antarctica
Topography, sediment distribution, and heat flux are all key boundary conditions governing the dynamics of the East Antarctic Ice Sheet (EAIS). EAIS stability is most at risk in Wilkes Land across vast expanses of marine-based catchments including the 1400 km × 600 km expanse of the Wilkes Subglacia...
Published in: | Journal of Geophysical Research: Earth Surface |
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Language: | English |
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American Geophysical Union
2016
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Online Access: | http://nora.nerc.ac.uk/id/eprint/513278/ https://nora.nerc.ac.uk/id/eprint/513278/1/Frederick_et_al-2016-Journal_of_Geophysical_Research__Earth_Surface.pdf http://onlinelibrary.wiley.com/wol1/doi/10.1002/2015JF003760/abstract |
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ftnerc:oai:nora.nerc.ac.uk:513278 2023-05-15T13:49:32+02:00 Distribution of subglacial sediments across the Wilkes Subglacial Basin, East Antarctica Frederick, Bruce C. Young, Duncan A. Blankenship, Donald D. Richter, Thomas G. Kempf, Scott D. Ferraccioli, Fausto Siegert, Martin J. 2016-04 text http://nora.nerc.ac.uk/id/eprint/513278/ https://nora.nerc.ac.uk/id/eprint/513278/1/Frederick_et_al-2016-Journal_of_Geophysical_Research__Earth_Surface.pdf http://onlinelibrary.wiley.com/wol1/doi/10.1002/2015JF003760/abstract en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/513278/1/Frederick_et_al-2016-Journal_of_Geophysical_Research__Earth_Surface.pdf Frederick, Bruce C.; Young, Duncan A.; Blankenship, Donald D.; Richter, Thomas G.; Kempf, Scott D.; Ferraccioli, Fausto orcid:0000-0002-9347-4736 Siegert, Martin J. 2016 Distribution of subglacial sediments across the Wilkes Subglacial Basin, East Antarctica. Journal of Geophysical Research: Earth Surface, 121 (4). 790-813. https://doi.org/10.1002/2015JF003760 <https://doi.org/10.1002/2015JF003760> Publication - Article PeerReviewed 2016 ftnerc https://doi.org/10.1002/2015JF003760 2023-02-04T19:42:51Z Topography, sediment distribution, and heat flux are all key boundary conditions governing the dynamics of the East Antarctic Ice Sheet (EAIS). EAIS stability is most at risk in Wilkes Land across vast expanses of marine-based catchments including the 1400 km × 600 km expanse of the Wilkes Subglacial Basin (WSB) region. Data from a recent regional aerogeophysical survey (Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)/IceBridge) are combined with two historical surveys (Wilkes basin/Transantarctic Mountains System Exploration-Ice-house Earth: Stability or DYNamism? (WISE-ISODYN) and Wilkes Land Transect (WLK)) to improve our understanding of the vast subglacial sedimentary basins impacting WSB ice flow and geomorphology across geologic time. Analyzing a combination of gravity, magnetic and ice-penetrating radar data, we present the first detailed subglacial sedimentary basin model for the WSB that defines distinct northern and southern subbasin isopachs with average sedimentary basin thicknesses of 1144 m ± 179 m and 1623 m ± 254 m, respectively. Notably, more substantial southern subbasin sedimentary deposition in the WSB interior supports a regional Wilkes Land hypothesis that basin-scale ice flow and associated glacial erosion is dictated by tectonic basement structure and the inherited geomorphology of preglacial fluvial networks. Orbital, temperate/polythermal glacial cycles emanating from adjacent alpine highlands during the early Miocene to late Oligocene likely preserved critical paleoclimatic data in subglacial sedimentary strata. Substantially thinner northern WSB subglacial sedimentary deposits are generally restricted to fault-controlled, channelized basins leading to prominent outlet glacier catchments suggesting a more dynamic EAIS during the Pliocene. Article in Journal/Newspaper Antarc* Antarctic Antarctica Antarctica Journal East Antarctica Ice Sheet Wilkes Land Natural Environment Research Council: NERC Open Research Archive Antarctic East Antarctica East Antarctic Ice Sheet Transantarctic Mountains Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Wilkes Subglacial Basin ENVELOPE(145.000,145.000,-75.000,-75.000) Journal of Geophysical Research: Earth Surface 121 4 790 813 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
Topography, sediment distribution, and heat flux are all key boundary conditions governing the dynamics of the East Antarctic Ice Sheet (EAIS). EAIS stability is most at risk in Wilkes Land across vast expanses of marine-based catchments including the 1400 km × 600 km expanse of the Wilkes Subglacial Basin (WSB) region. Data from a recent regional aerogeophysical survey (Investigating the Cryospheric Evolution of the Central Antarctic Plate (ICECAP)/IceBridge) are combined with two historical surveys (Wilkes basin/Transantarctic Mountains System Exploration-Ice-house Earth: Stability or DYNamism? (WISE-ISODYN) and Wilkes Land Transect (WLK)) to improve our understanding of the vast subglacial sedimentary basins impacting WSB ice flow and geomorphology across geologic time. Analyzing a combination of gravity, magnetic and ice-penetrating radar data, we present the first detailed subglacial sedimentary basin model for the WSB that defines distinct northern and southern subbasin isopachs with average sedimentary basin thicknesses of 1144 m ± 179 m and 1623 m ± 254 m, respectively. Notably, more substantial southern subbasin sedimentary deposition in the WSB interior supports a regional Wilkes Land hypothesis that basin-scale ice flow and associated glacial erosion is dictated by tectonic basement structure and the inherited geomorphology of preglacial fluvial networks. Orbital, temperate/polythermal glacial cycles emanating from adjacent alpine highlands during the early Miocene to late Oligocene likely preserved critical paleoclimatic data in subglacial sedimentary strata. Substantially thinner northern WSB subglacial sedimentary deposits are generally restricted to fault-controlled, channelized basins leading to prominent outlet glacier catchments suggesting a more dynamic EAIS during the Pliocene. |
format |
Article in Journal/Newspaper |
author |
Frederick, Bruce C. Young, Duncan A. Blankenship, Donald D. Richter, Thomas G. Kempf, Scott D. Ferraccioli, Fausto Siegert, Martin J. |
spellingShingle |
Frederick, Bruce C. Young, Duncan A. Blankenship, Donald D. Richter, Thomas G. Kempf, Scott D. Ferraccioli, Fausto Siegert, Martin J. Distribution of subglacial sediments across the Wilkes Subglacial Basin, East Antarctica |
author_facet |
Frederick, Bruce C. Young, Duncan A. Blankenship, Donald D. Richter, Thomas G. Kempf, Scott D. Ferraccioli, Fausto Siegert, Martin J. |
author_sort |
Frederick, Bruce C. |
title |
Distribution of subglacial sediments across the Wilkes Subglacial Basin, East Antarctica |
title_short |
Distribution of subglacial sediments across the Wilkes Subglacial Basin, East Antarctica |
title_full |
Distribution of subglacial sediments across the Wilkes Subglacial Basin, East Antarctica |
title_fullStr |
Distribution of subglacial sediments across the Wilkes Subglacial Basin, East Antarctica |
title_full_unstemmed |
Distribution of subglacial sediments across the Wilkes Subglacial Basin, East Antarctica |
title_sort |
distribution of subglacial sediments across the wilkes subglacial basin, east antarctica |
publisher |
American Geophysical Union |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/513278/ https://nora.nerc.ac.uk/id/eprint/513278/1/Frederick_et_al-2016-Journal_of_Geophysical_Research__Earth_Surface.pdf http://onlinelibrary.wiley.com/wol1/doi/10.1002/2015JF003760/abstract |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) ENVELOPE(145.000,145.000,-75.000,-75.000) |
geographic |
Antarctic East Antarctica East Antarctic Ice Sheet Transantarctic Mountains Wilkes Land Wilkes Subglacial Basin |
geographic_facet |
Antarctic East Antarctica East Antarctic Ice Sheet Transantarctic Mountains Wilkes Land Wilkes Subglacial Basin |
genre |
Antarc* Antarctic Antarctica Antarctica Journal East Antarctica Ice Sheet Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctica Antarctica Journal East Antarctica Ice Sheet Wilkes Land |
op_relation |
https://nora.nerc.ac.uk/id/eprint/513278/1/Frederick_et_al-2016-Journal_of_Geophysical_Research__Earth_Surface.pdf Frederick, Bruce C.; Young, Duncan A.; Blankenship, Donald D.; Richter, Thomas G.; Kempf, Scott D.; Ferraccioli, Fausto orcid:0000-0002-9347-4736 Siegert, Martin J. 2016 Distribution of subglacial sediments across the Wilkes Subglacial Basin, East Antarctica. Journal of Geophysical Research: Earth Surface, 121 (4). 790-813. https://doi.org/10.1002/2015JF003760 <https://doi.org/10.1002/2015JF003760> |
op_doi |
https://doi.org/10.1002/2015JF003760 |
container_title |
Journal of Geophysical Research: Earth Surface |
container_volume |
121 |
container_issue |
4 |
container_start_page |
790 |
op_container_end_page |
813 |
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1766251526698827776 |