The tectonic development and erosion of the knox subglacial sedimentary basin, East Antarctica
Sedimentary basins beneath the East Antarctic Ice Sheet (EAIS) have immense potential to inform models of the tectonic evolution of East Antarctica and its ice-sheet. However, even basic characteristics such as thickness and extent are often unknown. Using airborne geophysical data, we resolve the t...
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2016
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Online Access: | http://hdl.handle.net/10044/1/41638 https://doi.org/10.1002/2016GL071063 |
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ftimperialcol:oai:spiral.imperial.ac.uk:10044/1/41638 2023-05-15T13:51:15+02:00 The tectonic development and erosion of the knox subglacial sedimentary basin, East Antarctica Maritati, A Aitken, ARA Young, DA Roberts JL Blankenship, DD Siegert, MJ British Council (UK) 2016-10-15 http://hdl.handle.net/10044/1/41638 https://doi.org/10.1002/2016GL071063 unknown American Geophysical Union (AGU) Geophysical Research Letters ©2016. American Geophysical Union. All Rights Reserved. 2017-04-28 10737 10728 Science & Technology Physical Sciences Geosciences Multidisciplinary Geology ICE-SHEET DYNAMICS CONJUGATE MARGINS WILKES LAND GONDWANA INDIA BREAKUP OCEAN CONSTRAINTS TRANSITION EVOLUTION Meteorology & Atmospheric Sciences MD Multidisciplinary Journal Article 2016 ftimperialcol https://doi.org/10.1002/2016GL071063 2018-09-16T05:57:21Z Sedimentary basins beneath the East Antarctic Ice Sheet (EAIS) have immense potential to inform models of the tectonic evolution of East Antarctica and its ice-sheet. However, even basic characteristics such as thickness and extent are often unknown. Using airborne geophysical data, we resolve the tectonic architecture of the Knox Subglacial Sedimentary Basin in western Wilkes Land. In addition, we apply an erosion restoration model to reconstruct the original basin geometry for which we resolve geometry typical of a transtensional pull-apart basin. The tectonic architecture strongly indicates formation as a consequence of the rifting of India from East Gondwana from ca. 160-130 Ma, and we suggest a spatial link with the western Mentelle Basin offshore Western Australia. The erosion restoration model shows that erosion is confined within the rift margins, suggesting that rift structure has strongly influenced the evolution of the Denman and Scott ice streams. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet Wilkes Land Imperial College London: Spiral Antarctic East Antarctic Ice Sheet East Antarctica Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Geophysical Research Letters 43 20 |
institution |
Open Polar |
collection |
Imperial College London: Spiral |
op_collection_id |
ftimperialcol |
language |
unknown |
topic |
Science & Technology Physical Sciences Geosciences Multidisciplinary Geology ICE-SHEET DYNAMICS CONJUGATE MARGINS WILKES LAND GONDWANA INDIA BREAKUP OCEAN CONSTRAINTS TRANSITION EVOLUTION Meteorology & Atmospheric Sciences MD Multidisciplinary |
spellingShingle |
Science & Technology Physical Sciences Geosciences Multidisciplinary Geology ICE-SHEET DYNAMICS CONJUGATE MARGINS WILKES LAND GONDWANA INDIA BREAKUP OCEAN CONSTRAINTS TRANSITION EVOLUTION Meteorology & Atmospheric Sciences MD Multidisciplinary Maritati, A Aitken, ARA Young, DA Roberts JL Blankenship, DD Siegert, MJ The tectonic development and erosion of the knox subglacial sedimentary basin, East Antarctica |
topic_facet |
Science & Technology Physical Sciences Geosciences Multidisciplinary Geology ICE-SHEET DYNAMICS CONJUGATE MARGINS WILKES LAND GONDWANA INDIA BREAKUP OCEAN CONSTRAINTS TRANSITION EVOLUTION Meteorology & Atmospheric Sciences MD Multidisciplinary |
description |
Sedimentary basins beneath the East Antarctic Ice Sheet (EAIS) have immense potential to inform models of the tectonic evolution of East Antarctica and its ice-sheet. However, even basic characteristics such as thickness and extent are often unknown. Using airborne geophysical data, we resolve the tectonic architecture of the Knox Subglacial Sedimentary Basin in western Wilkes Land. In addition, we apply an erosion restoration model to reconstruct the original basin geometry for which we resolve geometry typical of a transtensional pull-apart basin. The tectonic architecture strongly indicates formation as a consequence of the rifting of India from East Gondwana from ca. 160-130 Ma, and we suggest a spatial link with the western Mentelle Basin offshore Western Australia. The erosion restoration model shows that erosion is confined within the rift margins, suggesting that rift structure has strongly influenced the evolution of the Denman and Scott ice streams. |
author2 |
British Council (UK) |
format |
Article in Journal/Newspaper |
author |
Maritati, A Aitken, ARA Young, DA Roberts JL Blankenship, DD Siegert, MJ |
author_facet |
Maritati, A Aitken, ARA Young, DA Roberts JL Blankenship, DD Siegert, MJ |
author_sort |
Maritati, A |
title |
The tectonic development and erosion of the knox subglacial sedimentary basin, East Antarctica |
title_short |
The tectonic development and erosion of the knox subglacial sedimentary basin, East Antarctica |
title_full |
The tectonic development and erosion of the knox subglacial sedimentary basin, East Antarctica |
title_fullStr |
The tectonic development and erosion of the knox subglacial sedimentary basin, East Antarctica |
title_full_unstemmed |
The tectonic development and erosion of the knox subglacial sedimentary basin, East Antarctica |
title_sort |
tectonic development and erosion of the knox subglacial sedimentary basin, east antarctica |
publisher |
American Geophysical Union (AGU) |
publishDate |
2016 |
url |
http://hdl.handle.net/10044/1/41638 https://doi.org/10.1002/2016GL071063 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) |
geographic |
Antarctic East Antarctic Ice Sheet East Antarctica Wilkes Land |
geographic_facet |
Antarctic East Antarctic Ice Sheet East Antarctica Wilkes Land |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet Wilkes Land |
op_source |
10737 10728 |
op_relation |
Geophysical Research Letters |
op_rights |
©2016. American Geophysical Union. All Rights Reserved. 2017-04-28 |
op_doi |
https://doi.org/10.1002/2016GL071063 |
container_title |
Geophysical Research Letters |
container_volume |
43 |
container_issue |
20 |
_version_ |
1766255014021431296 |