Staal, T and Reading, A and Halpin, J and Whittaker, J, Linking Antarctic geological observations and geophysical data in a probabilistic space, Abstracts from the XIII International Symposium on Antarctic Earth Sciences, 22-26 July 2019, Incheon, Republic of Korea, pp. A082. (2019) [Conference Extract]
Official URL: https://www.isaes2019.org:12090/home/
Recently, a number of improved geophysical datasets have been published. Data includes gravity acceleration from satellites, airborne measurements of the magnetic field, and maps of subglacial topography. Seismic models of the crust and lithosphere have also been refined, with new data and improved processing methods. Similar progress is seen in geological studies: new geological data have been acquired, and older data are reviewed and compiled. Observations from outcrops have been extended by marine core data and studies of glacial erratics to suggest properties of the subglacial terranes. Interpretations are supported by tectonic reconstructions of the East Antarctic continental margin.
We present an example of Antarctic basement/lithospheric terranes interpreted by linking geological observations with geophysical data utilising a probabilistic and multidimensional grid model. We use these domains to generate subglacial heat flow maps of the catchment area of the Aurora Basin for wider interdisciplinary use. The models are based on age-constrained crustal heat production, and we also include thermal properties from observations in adjoint Gondwanan margins, where available. We populate the domains with properties as age and provenance from geological data and use geophysics to extrapolate domain boundaries into the Antarctic interior.
The probabilistic approach illustrated in this presentation provides a robust and repeatable workflow. Our results and process are shareable with the broader community to use for interdisciplinary studies, and as a platform that will allow ongoing refinement.
|Item Type:||Conference Extract|
|Keywords:||Antarctica, lithosphere, Gondwana, seismology, gravity|
|Research Division:||Earth Sciences|
|Research Field:||Seismology and Seismic Exploration|
|Objective Division:||Expanding Knowledge|
|Objective Group:||Expanding Knowledge|
|Objective Field:||Expanding Knowledge in the Earth Sciences|
|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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