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The tectonic development and erosion of the Knox Subglacial Sedimentary Basin, East Antarctica

Citation

Maritati, A and Aitken, ARA and Young, DA and Roberts, JL and Blankenship, DD and Siegert, MJ, The tectonic development and erosion of the Knox Subglacial Sedimentary Basin, East Antarctica, Geophysical Research Letters, 43, (20) pp. 10728-10737. ISSN 0094-8276 (2016) [Refereed Article]


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Copyright Statement

2016. American Geophysical Union. All Rights Reserved.

DOI: doi:10.1002/2016GL071063

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.

Item Details

Item Type:Refereed Article
Keywords:tectonic development, erosion, Knox Basin, Antarctica, sedimentary basin
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
Author:Roberts, JL (Dr Jason Roberts)
ID Code:114868
Year Published:2016
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2017-03-01
Last Modified:2017-05-16
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