Hayden, Travis G. et al. (2011): One dimensional backstripping results from IODP Expedition 318, Site U1356; tectonic implications for the Wilkes Land margin of Antarctica
Leg/Site/Hole:
Related Expeditions:
IODP 318
Identifier:
ID:
2013-009998
Type:
georefid
Creator:
Name:
Hayden, Travis G.
Affiliation:
Western Michigan University, Department of Geosciences, Kalamazoo, MI, United States
Role:
author
Name:
Kominz, Michelle A.
Affiliation:
CSIC-Universidad de Granada, Spain
Role:
author
Name:
Gonzalez, Jhon
Affiliation:
Utrecht University, Netherlands
Role:
author
Name:
Escutia Dotti, Carlota
Affiliation:
Role:
author
Name:
Brinkhuis, Henk
Affiliation:
Role:
author
Name:
Klaus, A.
Affiliation:
Role:
author
Name:
Fehr, A.
Affiliation:
Role:
author
Name:
Williams, T.
Affiliation:
Role:
author
Name:
Bendle, J.
Affiliation:
Role:
author
Name:
Bijl, Peter K.
Affiliation:
Role:
author
Name:
Bohaty, S.
Affiliation:
Role:
author
Name:
Carr, S.
Affiliation:
Role:
author
Name:
Dunbar, R.
Affiliation:
Role:
author
Name:
Iwai, M.
Affiliation:
Role:
author
Name:
Jiminez-Espejo, F.
Affiliation:
Role:
author
Name:
Katsuki, K.
Affiliation:
Role:
author
Name:
Kong, G.
Affiliation:
Role:
author
Name:
McKay, R.
Affiliation:
Role:
author
Name:
Nakai, M.
Affiliation:
Role:
author
Name:
Olney, M.
Affiliation:
Role:
author
Name:
Passchier, S.
Affiliation:
Role:
author
Name:
Pekar, S.
Affiliation:
Role:
author
Name:
Sugisaki, S.
Affiliation:
Role:
author
Name:
Tauxe, L.
Affiliation:
Role:
author
Name:
Tuo, S.
Affiliation:
Role:
author
Name:
van de Flierdt, C.
Affiliation:
Role:
author
Name:
Welsh, K.
Affiliation:
Role:
author
Name:
Yamane, M.
Affiliation:
Role:
author
Name:
Pross, J.
Affiliation:
Role:
author
Name:
Riesselman, C.
Affiliation:
Role:
author
Name:
Roehl, U.
Affiliation:
Role:
author
Name:
Sakai, T.
Affiliation:
Role:
author
Name:
Shrivastava, P.
Affiliation:
Role:
author
Name:
Stickley, C.
Affiliation:
Role:
author
Identification:
Title:
One dimensional backstripping results from IODP Expedition 318, Site U1356; tectonic implications for the Wilkes Land margin of Antarctica
Year:
2011
Source:
In: Anonymous, Geological Society of America, 2011 annual meeting
Publisher:
Geological Society of America (GSA), Boulder, CO, United States
Volume:
43
Issue:
5
Pages:
99-100
Abstract:
Wilkes Land is the conjugate margin of the Great Australian Bight, which underwent extension, thinning and rifting from approximately 160 Ma until breakup at approximately 83 Ma. Both Wilkes Land and the Great Australian Bight are considered passive margins, and were thought to be tectonically inactive since breakup at 83 Ma. We have backstripped the U1356 Core recovered from the continental rise off Wilkes Land, Antarctica by IODP Expedition 318. Backstripping input included lithological and sedimentary analysis, paleo-environmental indicators, combined paleomagnetic and biostratigraphic chronologies, and physical properties measurements. Tectonic subsidence shows a major event between 50 and 33.6 Ma, a time represented by a hiatus in the U1356 core. The magnitude of subsidence requires it to be tectonic in origin, and the timing matches with a reorganization of plate motions that represents the transition from slow spreading to fast spreading between Antarctica and Australia, which occurred at approximately 43 Ma. Coupled with a regional seismic framework, and using other Expedition 318 site analyses, the Wilkes Land margin is shown to be far more complex then the simple passive margin currently assumed. We explore several possible causes for the subsidence observed. One clue might be the tertiary episodic volcanism of Southeast Australia, which is suggested to be driven by lithospheric edge effect convection in the asthenosphere. Additional co-authors: A. Klaus, A. Fehr, T. Williams, J. Bendle, P. Bijl, S. Bohaty, S. Carr, R. Dunbar, M. Iwai, F. Jimenez-Espejo, K. Katsuki, G. Kong, R. McKay, M. Nakai, M. Olney, S. Passchier, S. Pekar, S. Sugisaki, L. Tauxe, S. Tuo, C. van de Flierdt, K. Welsh, M. Yamane, J. Pross, C. Riesselman, U. Rohl, T. Sakai, P. Shrivastava, C. Stickley, Expedition 318 Scientific Participants.
Language:
English
Genre:
Rights:
URL:
Coverage: Geographic coordinates: North:-63.1837 West:135.5956 East:
135.5956 South:-63.1837
Keywords: Solid-earth geophysics; Antarctica; asthenosphere; Australasia; Australia; backstripping; biostratigraphy; continental rise; convection; cores; crustal thinning; Expedition 318; extension tectonics; geophysical methods; Great Australian Bight; Indian Ocean; Integrated Ocean Drilling Program; IODP Site U1356; measurement; ocean floors; one-dimensional models; passive margins; physical properties; plate tectonics; rifting; sea-floor spreading; seismic methods; southeastern Australia; Southern Ocean; tectonics; volcanism; Wilkes Land;
.