Tuesday, 28 August 2007
2.PS-33

Gaussberg Rift – illusion or reality?

Dmitry A. Golynsky, The Saint-Petersburg State University, VNIIOkeangeologia, St.-Petersburg, 190121, Russia and Alexander V. Golynsky, VNIIOkeangeologia, 1, Angliysky Avenue, St. Petersburg, 190121, Russia.

Radio-echosounding and RADARSAT mosaic data provide new evidence for rifted crust in Princess Elizabeth Land, East Antarctica. The arcuate Gaussberg Rift consists of two sub-parallel depressions separated by segmented horst-like escarpments. The rift is about 500 km long and its width varies from 60 km in the south-western part to 150 km near the West Ice Shelf. The Gaussberg Rift, part of the Lambert rift system, was probably initiated in the Permian at the same time as the Lambert sub-meridional rift zone with deposition of coal-bearing Permian rocks. The Gaussberg Rift probably exploited a weak zone between the Proterozoic mobile belt and Vestfold-Rauer cratonic block.

[Manuscript]

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