Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 41, Issue 7, Pages 2390-2400Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2014GL059405
Keywords
East Antarctica; Gondwana; Columbia; Rodinia; East Antarctic Ice Sheet
Categories
Funding
- Monash University Research Accelerator Program
- Centre for Exploration Targeting at UWA
- UWA Geoscience Foundation
- Australian Antarctic Division [3103, 4077]
- NSF [ANT-0733025]
- NASA [NNX09AR52G, NNG10HP06C-ARRA, NNX11AD33G]
- NERC [NE/F016646/1, NE/D003733/1]
- Jackson School of Geoscience
- University of Edinburgh
- Jet Propulsion Laboratory
- G. Unger Vetlesen Foundation
- Australian Government's Cooperative Research Centres Programme through the Antarctic Climate and Ecosystems Cooperative Research Centre
- NERC [NE/G00465X/1, bas0100026, NE/F016646/1] Funding Source: UKRI
- Natural Environment Research Council [NE/F016646/1, NE/G00465X/1, bas0100026] Funding Source: researchfish
- NASA [NNX11AD33G, 148741, NNX09AR52G, 106520] Funding Source: Federal RePORTER
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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.
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