Aitken_2014_Wilkes_Land.pdf (9.25 MB)
Download fileThe subglacial geology of Wilkes Land, East Antarctica
journal contribution
posted on 2023-05-18, 01:28 authored by Aitken, A, Young, D, Ferraccioli, F, Betts, P, Greenbaum, J, Richter, T, Jason RobertsJason Roberts, Blankenship, D, Siegert, MWilkes 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.
History
Publication title
Geophysical Research LettersVolume
41Issue
7Pagination
2390-2400ISSN
0094-8276Department/School
Institute for Marine and Antarctic StudiesPublisher
Wiley-Blackwell Publishing, IncPlace of publication
United StatesRights statement
Copyright 2014 American Geophysical UnionRepository Status
- Open