Maritati, A and Halpin, J and Whittaker, J, New geological insights fingerprint high heat producing crust in the remote interior of Wilkes Land, 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 examined the provenance of three low-grade quartzite erratic samples from the Windmill Islands region to provide evidence of the age and composition of the ice-covered bedrock. We suggest these quartzite erratic samples were sourced from a previously-unknown intra-continental sedimentary basin in the interior of Wilkes Land. U–Pb ages of detrital zircons include dominant age peaks at c. 1200 Ma and c. 1490 Ma, which fingerprint the provenance of this sedimentary basin.
Based on the detrital zircon record in these quartzite erratic samples, and using recent Australia-Antarctica plate reconstructions, we suggest there are heat-producing granitic source rocks in Wilkes Land equivalent in age and composition to those present in the Coompana Province of southwestern Australia. We further suggest that the significant heat production variability that characterises the Coompana granitic basement (2.52–6.39 μW/m3) can therefore also be expected in the interior of Wilkes Land. These new geological insights indicate that a higher and more variable regional sub-glacial heat flow might be expected in this region than currently resolved in available models.
|Item Type:||Conference Extract|
|Keywords:||Antarctica, Wilkes Land, heat production|
|Research Division:||Earth Sciences|
|Objective Division:||Expanding Knowledge|
|Objective Group:||Expanding Knowledge|
|Objective Field:||Expanding Knowledge in the Earth Sciences|
|UTAS Author:||Maritati, A (Mr Alessandro Maritati)|
|UTAS Author:||Halpin, J (Dr Jacqueline Halpin)|
|UTAS Author:||Whittaker, J (Associate Professor Jo Whittaker)|
|Deposited By:||Oceans and Cryosphere|
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