Staal, T and Reading, A and Halpin, J and Whittaker, J, Towards a multi-domain lithospheric model of East Antarctica, TACtical Workshop Abstracts, 21-23 March 2018, Hobart, Tasmania (2018) [Conference Extract]
Official URL: https://www.conferences.com.au/2018-taking-the-tem...
We combine geophysical constraints with geological knowledge from the sparse outcrops and known geology from Gondwanan neighbours in a plate reconstruction framework to attempt a regionalization of East Antarctica. We use Bayesian inference to suggest the most probable boundaries by using a multivariate prior constrained by available geophysical datasets. The boundaries form a segmentation of the Antarctic lithosphere and can be weighted with probabilistic significance and location. Our implementation allows sequential improvement as updated and refined seismic tomography and potential field data compilations. Likewise, a more consistent approach to adding mapped geological information adds further robust constraints.
The result is presented as a first draft of a multi-domain tessellated terrane map of the East Antarctic lithosphere. We believe that this approach will be useful in estimating both basal lithosphere and crustal contributions to heat flux. The approach provides a stepping stone towards more refined models in an evolving framework.
|Item Type:||Conference Extract|
|Keywords:||Antarctica, lithosphere, Bayesian, heat flux|
|Research Division:||Earth Sciences|
|Research Field:||Seismology and seismic exploration|
|Objective Division:||Environmental Policy, Climate Change and Natural Hazards|
|Objective Group:||Understanding climate change|
|Objective Field:||Effects of climate change on Antarctic and sub-Antarctic environments (excl. social impacts)|
|UTAS Author:||Staal, T (Mr Tobias Staal)|
|UTAS Author:||Reading, A (Professor Anya Reading)|
|UTAS Author:||Halpin, J (Dr Jacqueline Halpin)|
|UTAS Author:||Whittaker, J (Associate Professor Jo Whittaker)|
|Deposited By:||Oceans and Cryosphere|
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