The tectonic development and erosion of the knox subglacial sedimentary basin, East Antarctica

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Title: The tectonic development and erosion of the knox subglacial sedimentary basin, East Antarctica
Author(s): Maritati, A
Aitken, ARA
Young, DA
Roberts JL
Blankenship, DD
Siegert, MJ
Item Type: Journal Article
Abstract: 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.
Publication Date: 28-Oct-2016
Date of Acceptance: 15-Oct-2016
URI: http://hdl.handle.net/10044/1/41638
DOI: https://dx.doi.org/10.1002/2016GL071063
ISSN: 1944-8007
Publisher: American Geophysical Union (AGU)
Start Page: 10728
End Page: 10737
Journal / Book Title: Geophysical Research Letters
Volume: 43
Issue: 20
Sponsor/Funder: British Council (UK)
Funder's Grant Number: ICECAP-2
Copyright Statement: ©2016. American Geophysical Union. All Rights Reserved.
2017-04-28
Keywords: 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
Publication Status: Published
Appears in Collections:Centre for Environmental Policy
Faculty of Natural Sciences



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