BABOC: A new project aimed at analysing geological boundary conditions for the East Antarctic Ice Sheet in the Wilkes Subglacial Basin
The Wilkes Subglacial Basin extends for ca 1,400 km from George V Land into the interior of East Antarctica and hosts several major glaciers that drain a large sector of the East Antarctic Ice Sheet (EAIS). The region is of major significance for assessing the long-term stability of the EAIS, as it...
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ftunivgenova:oai:iris.unige.it:11567/596142 2024-02-11T09:56:14+01:00 BABOC: A new project aimed at analysing geological boundary conditions for the East Antarctic Ice Sheet in the Wilkes Subglacial Basin ARMADILLO, EGIDIO BALBI, PIETRO BOZZO, EMANUELE Fausto Ferraccioli Tom Jordan Duncan Young Don Blankenship Martin Siegert Armadillo, Egidio Fausto, Ferraccioli Balbi, Pietro Tom, Jordan Duncan, Young Don, Blankenship Bozzo, Emanuele Martin, Siegert 2013 ELETTRONICO http://hdl.handle.net/11567/596142 eng eng ispartofbook:Geophysical Research Abstracts Vol. 15 EGU General Assembly 2013 firstpage:13335 lastpage:13335 numberofpages:1 http://hdl.handle.net/11567/596142 info:eu-repo/semantics/conferenceObject 2013 ftunivgenova 2024-01-17T17:44:13Z The Wilkes Subglacial Basin extends for ca 1,400 km from George V Land into the interior of East Antarctica and hosts several major glaciers that drain a large sector of the East Antarctic Ice Sheet (EAIS). The region is of major significance for assessing the long-term stability of the EAIS, as it lies well below sea level and its bedrock deepens inland. This makes it potentially prone to marine ice sheet instability, much like areas of the West Antarctic Ice Sheet (WAIS) that are presently experiencing significant mass loss. This sector of the EAIS has also recently become a major focus of research within IODP Leg 318 that aims to better comprehend the initial stages of glaciation in East Antarctica and the subsequent history and stability of the ice sheet in response to major paleoclimatic changes (Escutia et al., 2010 IODP Rep.). Understanding geological boundary conditions in this region is therefore important to assess their influence on ice sheet dynamics and stability. Early geophysical models inferred the existence of a major extensional sedimentary basin beneath the region, which if true, could be similar to some areas of the WAIS, There thick subglacial sediments deposited within deep rift basins or forming thin marine sedimentary drapes have been inferred to exert a key influence on the onset and maintenance of fast- glacial flow. However, later geophysical models indicated that the Wilkes Basin contains little or no sediment, is not rift-related and formed in response to Cenozoic flexural uplift of the Transantarctic Mountains (TAM). A major joint Italian-UK aerogeophysical exploration campaign over parts of the Wilkes Basin is super-seeding these earlier geophysical views of the basin: i) Precambrian and Paleozoic basement faults can now be recognised as exerting fundamental controls on the location of the topographic margins of the basin; ii) the crust underlying the basin is thinner compared to the TAM, but is unlikely to be Cretaceous or Cenozoic-age rifted crust and; iii) its bedrock is ... Conference Object Antarc* Antarctic Antarctica East Antarctica George V Land Ice Sheet Università degli Studi di Genova: CINECA IRIS Antarctic East Antarctica West Antarctic Ice Sheet East Antarctic Ice Sheet Transantarctic Mountains George V Land ENVELOPE(148.000,148.000,-68.500,-68.500) Wilkes Subglacial Basin ENVELOPE(145.000,145.000,-75.000,-75.000) |
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Open Polar |
collection |
Università degli Studi di Genova: CINECA IRIS |
op_collection_id |
ftunivgenova |
language |
English |
description |
The Wilkes Subglacial Basin extends for ca 1,400 km from George V Land into the interior of East Antarctica and hosts several major glaciers that drain a large sector of the East Antarctic Ice Sheet (EAIS). The region is of major significance for assessing the long-term stability of the EAIS, as it lies well below sea level and its bedrock deepens inland. This makes it potentially prone to marine ice sheet instability, much like areas of the West Antarctic Ice Sheet (WAIS) that are presently experiencing significant mass loss. This sector of the EAIS has also recently become a major focus of research within IODP Leg 318 that aims to better comprehend the initial stages of glaciation in East Antarctica and the subsequent history and stability of the ice sheet in response to major paleoclimatic changes (Escutia et al., 2010 IODP Rep.). Understanding geological boundary conditions in this region is therefore important to assess their influence on ice sheet dynamics and stability. Early geophysical models inferred the existence of a major extensional sedimentary basin beneath the region, which if true, could be similar to some areas of the WAIS, There thick subglacial sediments deposited within deep rift basins or forming thin marine sedimentary drapes have been inferred to exert a key influence on the onset and maintenance of fast- glacial flow. However, later geophysical models indicated that the Wilkes Basin contains little or no sediment, is not rift-related and formed in response to Cenozoic flexural uplift of the Transantarctic Mountains (TAM). A major joint Italian-UK aerogeophysical exploration campaign over parts of the Wilkes Basin is super-seeding these earlier geophysical views of the basin: i) Precambrian and Paleozoic basement faults can now be recognised as exerting fundamental controls on the location of the topographic margins of the basin; ii) the crust underlying the basin is thinner compared to the TAM, but is unlikely to be Cretaceous or Cenozoic-age rifted crust and; iii) its bedrock is ... |
author2 |
Armadillo, Egidio Fausto, Ferraccioli Balbi, Pietro Tom, Jordan Duncan, Young Don, Blankenship Bozzo, Emanuele Martin, Siegert |
format |
Conference Object |
author |
ARMADILLO, EGIDIO BALBI, PIETRO BOZZO, EMANUELE Fausto Ferraccioli Tom Jordan Duncan Young Don Blankenship Martin Siegert |
spellingShingle |
ARMADILLO, EGIDIO BALBI, PIETRO BOZZO, EMANUELE Fausto Ferraccioli Tom Jordan Duncan Young Don Blankenship Martin Siegert BABOC: A new project aimed at analysing geological boundary conditions for the East Antarctic Ice Sheet in the Wilkes Subglacial Basin |
author_facet |
ARMADILLO, EGIDIO BALBI, PIETRO BOZZO, EMANUELE Fausto Ferraccioli Tom Jordan Duncan Young Don Blankenship Martin Siegert |
author_sort |
ARMADILLO, EGIDIO |
title |
BABOC: A new project aimed at analysing geological boundary conditions for the East Antarctic Ice Sheet in the Wilkes Subglacial Basin |
title_short |
BABOC: A new project aimed at analysing geological boundary conditions for the East Antarctic Ice Sheet in the Wilkes Subglacial Basin |
title_full |
BABOC: A new project aimed at analysing geological boundary conditions for the East Antarctic Ice Sheet in the Wilkes Subglacial Basin |
title_fullStr |
BABOC: A new project aimed at analysing geological boundary conditions for the East Antarctic Ice Sheet in the Wilkes Subglacial Basin |
title_full_unstemmed |
BABOC: A new project aimed at analysing geological boundary conditions for the East Antarctic Ice Sheet in the Wilkes Subglacial Basin |
title_sort |
baboc: a new project aimed at analysing geological boundary conditions for the east antarctic ice sheet in the wilkes subglacial basin |
publishDate |
2013 |
url |
http://hdl.handle.net/11567/596142 |
long_lat |
ENVELOPE(148.000,148.000,-68.500,-68.500) ENVELOPE(145.000,145.000,-75.000,-75.000) |
geographic |
Antarctic East Antarctica West Antarctic Ice Sheet East Antarctic Ice Sheet Transantarctic Mountains George V Land Wilkes Subglacial Basin |
geographic_facet |
Antarctic East Antarctica West Antarctic Ice Sheet East Antarctic Ice Sheet Transantarctic Mountains George V Land Wilkes Subglacial Basin |
genre |
Antarc* Antarctic Antarctica East Antarctica George V Land Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica George V Land Ice Sheet |
op_relation |
ispartofbook:Geophysical Research Abstracts Vol. 15 EGU General Assembly 2013 firstpage:13335 lastpage:13335 numberofpages:1 http://hdl.handle.net/11567/596142 |
_version_ |
1790601531825848320 |