Developing a consistent sequence stratigraphy for the Wilkes Land and Great Australian Bight margins

The conjugate margins of Wilkes Land, Antarctica, and the Great Australian Bight (GAB) are amongst the least understood continental margins. Breakup along the GAB–Wilkes Land part of the Australian–Antarctic margin commenced at approximately 83 Ma. Using recent stratigraphic interpretations develope...

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Bibliographic Details
Main Authors: Hannah Lane, R. Dietmar Müller, Jennifer M. Totterdell, Joanne M. Whittaker
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
Indian Ocean
Great Australian Bight
Bight Basin
Wilkes Land
Antarctica
seismic stratigraphy
continental margin
conjugate margins
Antarctic
Indian
The Antarctic
Antarc*
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.656.6679
http://earthbyte.org/Resources/Pdf/Lane_Aus_Ant_seismic_stratigraphy_EABS4_2012.pdf
Description
Summary:The conjugate margins of Wilkes Land, Antarctica, and the Great Australian Bight (GAB) are amongst the least understood continental margins. Breakup along the GAB–Wilkes Land part of the Australian–Antarctic margin commenced at approximately 83 Ma. Using recent stratigraphic interpretations developed for the GAB, we have established a sequence stratigraphy for the Wilkes Land margin that will, for the first time, allow for a unified study of the conjugate margins. By reconstructing the two margins to their positions prior to breakup, we were able to identify comparable packages on the Wilkes Land margin to those recognised on the GAB margin. Excluding the glacial sediments on the Antarctic margin, the sedimentary sequence along the Wilkes Land margin is very thin compared to the GAB margin, which has substantially more syn- and post-rift sediments. Despite the differences in

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