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The subglacial geology of Wilkes Land, East Antarctica
Citation
Aitken, A and Young, D and Ferraccioli, F and Betts, P and Greenbaum, J and Richter, T and Roberts, JL and Blankenship, D and Siegert, M, The subglacial geology of Wilkes Land, East Antarctica, Geophysical Research Letters, 41, (7) pp. 2390-2400. ISSN 0094-8276 (2014) [Refereed Article]
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Copyright Statement
Copyright 2014 American Geophysical Union
Abstract
Wilkes Land is a key region for studying the configuration of Gondwana and for appreciating the role of tectonic boundary conditions on East Antarctic Ice Sheet (EAIS) behavior. Despite this importance, it remains one of the largest regions on Earth where we lack a basic knowledge of geology. New magnetic, gravity, and subglacial topography data allow the region's first comprehensive geological interpretation. We map lithospheric domains and their bounding faults, including the suture between Indo-Antarctica and Australo-Antarctica. Furthermore, we image subglacial sedimentary basins, including the Aurora and Knox Subglacial Basins and the previously unknown Sabrina Subglacial Basin. Commonality of structure in magnetic, gravity, and topography data suggest that pre-EAIS tectonic features are a primary control on subglacial topography the preservation of this relationship after glaciation suggests that these tectonic features provide topographic and basal boundary conditions that have strongly influenced the structure and evolution of the EAIS. Key Points Wilkes Land geology is comprehensively characterized for the first time New and known continent-scale faults and sedimentary basins are defined These major tectonic features define current subglacial topography © 2014. American Geophysical Union. All Rights Reserved.
Item Details
Item Type: | Refereed Article |
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Keywords: | East Antarctica, Gondwana, Columbia, Rodinia, East Antarctic Ice Sheet |
Research Division: | Earth Sciences |
Research Group: | Physical geography and environmental geoscience |
Research Field: | Glaciology |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the environmental sciences |
UTAS Author: | Roberts, JL (Dr Jason Roberts) |
ID Code: | 92301 |
Year Published: | 2014 |
Web of Science® Times Cited: | 100 |
Deposited By: | CRC-Antarctic Climate & Ecosystems |
Deposited On: | 2014-06-13 |
Last Modified: | 2017-11-30 |
Downloads: | 157 View Download Statistics |
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