Precambrian lithospheric structure in East Antarctica controls Phanerozoic basin forming and Gondwana breakup geometry ...

• Main Authors: Aitken, Alan, Li, Lu, Kulessa, Bernd, Schroeder, Dustin, Jordan, Tom, Whittaker, Jo, Anandakrishnan, Sridhar, Dawson, Eliza, Wiens, Douglas, Eisen, Olaf, Siegert, Martin
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: East Antarctica; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.57757/iugg23-2273; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018491

<!--!introduction!--> East Antarctica is the keystone to Gondwana and is fundamental to the understanding of continental breakup and the distribution of continents since the Jurassic, with further implications for the formation of today’s oceans and ice sheets and evolution of climate. Analysis of multiple geophysical datasets in East Antarctica, including radio-echo sounding, potential fields and seismic datasets have revealed the distribution of sedimentary basins within East Antarctica. Differences in the morphology and orientation of sedimentary basins define lithospheric domains separated by basement-dominated regions. The basement highs are defined by multiscale linear features evident in gravity, bed topography and seismic tomography models. These boundaries, we suggest, indicate the margins of former continental blocks that were assembled in the Precambrian to form East Antarctica. Rheological contrasts at block margins controlled later deformation during Phanerozoic extension. First, the ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...